Differences between practical work inside a laboratory and outside a laboratory​

Answers

Answer 1

The practical work inside the lab includes lab equipments, chemicals, and the practical outside a laboratory is more about conservation of nature and practicals include natural things in their living areas.

What are lab practicals?

Practicals are set up stations with lab equipments and  chemicals and where students learn practical of the theoretical statements.

The exams of practicals are done to test the leaning of chemistry of the students.

Thus, the practical work inside the lab includes lab equipments, chemicals, and the practical outside a laboratory is more about conservation of nature and practicals include natural things in their living areas.

Learn more about lab practicals

https://brainly.com/question/11850721

#SPJ1


Related Questions

The element __ is the most similar to oxygen in chemical and physical properties.

Answers

Answer:

the element air is the most similar to oxygen in chemical. and physical properties

Potassium fluoride has a solubility of 92 g of KF in 100. g of H₂0 at 18 °C. Determine if
each of the following mixtures forms an unsaturated or saturated solution at 18 C:

a. adding 24 g of KF to 25 g of H₂O


b. adding 47 g of KF to 50. g of H₂O


c. adding 127 g of KF to 150. g of H₂O

Answers

a) In 25 grams of water, the solubility is 92/4 = 23 grams, so adding 24 grams will produce a supersaturated solution.

b) In 50 grams of water, the solubility is 92/2 = 46 grams, so adding 47 grams will produce a supersaturated solution.

c) In 150 grams of water, the solubility is 92(1.5) = 138 grams, so adding 127 grams will produce an unsaturated solution.

Consider the ions of potassium (K) and sulfur (S), Write chemical formulas for all possible ionic compounds involving these ions, using the simplest ratio(s) of potassium (K) and sulfur (S). Keep in mind that the sum of the charges in an ionic compound must equal zero. Answer:​

Answers

The compounds that could exists between the ions K^+ and S^2- are K2S and K2S2.

What is an ionic compound?

An ionic compound is a commpound that is composed of ions. Let us note that ionic compounds are always such that the sum of the charges on the ions is zero.

Hence, the compounds that could exists between the ions K^+ and S^2- are K2S and K2S2.

Learn more about ionic compounds:https://brainly.com/question/9167977

#SPJ1

The compounds between the ions [tex]K^+[/tex] and [tex]S^{2-}[/tex] are [tex]K_2S.[/tex]

What is an ionic compound?

An ionic compound is a compound that is composed of ions. Let us note that ionic compounds are always such that the sum of the charges on the ions is zero.

You need two potassium atoms to form an ionic bond with one sulfur atom. Potassium ions are formed by donating and losing their electrons in the outermost shell, the lost electrons are gained by sulphur atom to form [tex]2K^+[/tex] and [tex]S^{2-}[/tex], respectively.

The attraction between the positive ions and negative ions gives rise to the ionic bond and the molecular formula is [tex]K_2S[/tex]

Learn more about ionic compounds:

brainly.com/question/9167977

#SPJ1


Write the ion symbol for an atom with the given number of protons and electrons.
55 protons and 54 electrons

Answers

The element is identified with the number of protons, and the element with 55 protons is Cs.

Since there are 54 electrons, the overall charge is +1, so the answer is [tex]\boxed{\text{Cs}^{+}}[/tex]

The ion symbol for an atom with 55 protons and 54 electrons is [tex]Cs^+[/tex]. In chemistry, a "ion" is a term used to describe an electrically charged particle.

An electrically charged particle is referred to as a "ion" in chemistry. It can be negatively charged (referred to as an anion) or positively charged (referred to as a cation). Ions are created when there is an imbalance between the number of protons and electrons in an atom, which happens when atoms gain or lose electrons. Ions are essential in many chemical processes and are in charge of an electrolytic solution's conductivity. Electric current can flow because in solution, ions are free to travel and carry electrical charges. Ions play an important role in cellular communication and the transport of chemicals through cell membranes in biological systems.

To know more about ion, here:

https://brainly.com/question/29183072

#SPJ6

Question 17 of 30
For a reaction, AH = -286 kJ. When is the reaction spontaneous?
A. When TAS> 0
B. When TA S= -286 kJ
C. When TAS<-286 kJ
D. When TAS = 2(-286 kJ)

Answers

The reaction is spontaneous when TΔS is greater than zero (TΔS>0).

Spontaneous reaction

A spontaneous reaction is determined by applying Gib's free energy formula as follows;

ΔG = ΔH - TΔS

A reaction is spontaneous when Gib's free energy is negative.

For the given example, the change in enthalpy is negative (-286 kJ), to obtain a negative Gib's free energy, the entropy must be positive.

Thus, the reaction is spontaneous when TΔS is greater than zero (TΔS>0).

Learn more about spontaneous reaction here: https://brainly.com/question/24376583

#SPJ1

A high temperature reaction vessel is charged with 0.5860 mol of iron powder and 35.1 L of oxygen gas at standard temperature pressure. On heating, the iron and oxygen react according to the balanced reaction below.

4Fe(s) + 3O2(g) ®️ 2Fe2O3(s)

After the reaction vessel is called, and assuming the reaction goes to completion, what volume of oxygen remains?

Answers

Answer: 25.1195 L

Explanation:

Given:

There are 0.5860 mol of Iron powder (Fe)

The volume of oxygen gas at STP is 31.5 L

The volume filled by a gas at STP is approximately 22.71 L

Therefore, the moles of oxygen gas at STP = Volume of oxygen gas at STP/ 22.71

= 35.1/22.71

= 1.5456 mol

The balanced chemical equation given for this reaction is:

4Fe(s) + 3O2 (g) ----> 2Fe2O3 (s)

Dividing the above equation by 2, yields:

2Fe(s) + 3/2O2(g) -------> Fe2O3 (s)

From the equation we see:

2 moles of Fe reacts with 3/2 mole of O2 to give one mole of Fe2O3

Thus, let x moles of O2 react with 0.5860 moles of Fe

0.5860/2=x/3/2

0.5860*3=4*x

x = 1.758/4

x =0.4395 mol

So the remaining moles of oxygen gas = 1.5456 - 0.4395

= 1.1061 mol

Therefore, the amount of oxygen gas, in litres, remaining is = 1.1061*22.71

= 25.1195 L

For addition and subtraction, round the result to match the measurement with the fewest decimal places. For example,

3.4 cm + 4.75 cm = 8.2 cm

because 3.4 cm is only measured to the nearest 0.1 centimeter.

Choose the answer with the correct number of significant digits.

4.6 cm + 2.35 cm =
cm

Answers

Answer:

7 cm

Explanation:

If the following digit is greater than or equal to 5, the decimal place is rounded up (moved up to the next number); if the following digit is less than 5, the decimal place stays the same.

4.6 + 2.35 = 6.95 cm

However, as stated in your question, cm is only being measured to the nearest 0.1 centimeters in your question.

So, you would round the digit 9 up by 1, meaning you would round it to 10. However, there are only nine digits available in our base-10 counting system, so you carry the value over,

6.95 cm could be rounded to '6. 100 cm', which is 7 cm.

Monosaccharides and disaccharides are what kind of molecules?

Answers

Answer:

They are small molecules

Explanation: Hope this helps

Answer: C) Carbohydrates

Explanation:

A) Lipids

B) Nucleic acids

C) Carbohydrates

D) Proteins

apex

Methane has a heat of fusion of 0.84 kJ/mol and a heat of vaporization of 9.2 kJ/mol. Estimate the value for the heat of sublimation.
9.00 kJ/mol
11.0 kJ/mol
8.00 kJ/mol
10.0 kJ/mol
12.0 kJ/mol

Answers

J   BIJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ

Does a displacement reaction take place in 'magnesium + lead nitrate'? and if so why?

Answers

Answer:

Maybe or maybe not (not sure)

Explanation:

A displacement reaction is a type of reaction where one element is displaced by another from a compound.

In the case of magnesium and lead nitrate, magnesium is more reactive than lead. Therefore, it will displace lead from lead nitrate to form magnesium nitrate and lead.

The reaction can be represented as:

Mg(s) + Pb(NO3)2(aq) → Mg(NO3)2(aq) + Pb(s)


Another answer could be;

A displacement reaction does not take place in 'magnesium + lead nitrate' because magnesium is more reactive than lead.

URGENT!!! Based on the following reaction, how much water is produced when oxygen react with 1 mole of C₂H8?

C₂H8 (g) + 40₂ (g) →2CO2 (g) + 4H₂O(g)​

Answers

Answer:

4 moles

Explanation:

For every mole of deuteriomethane consumed, 4 moles of water are produced.

So, the answer is 4 moles

A scientist stores a very large number of particles in a container. In order to determine the number of particles, the scientist measures the temperature, pressure, and volume of the container and calculates the moles using the ideal gas law. In order for the calculated value to have the greatest accuracy, the scientist should make sure that (select all the apply)

A the temperature is high
B the volume is high
C the pressure is high
D the ideal gas law is always accurate, the conditions will not matter

Answers

When the temperature and the volume of the gas stored in the container are high then the number of the moles will be measured accurately. Thus, options A and B are correct.

What is the ideal gas law?

The ideal gas law is the establishment of the relation between the elements like the moles, pressure, temperature, and the volume of the gas containing the particle.

The ideal gas states:

PV = nRT

With an increase in the temperature, the number of particles that collides increases as the kinetic energy increases. The particle of the container is more when the volume of the gas is more.

Therefore, in options A and B high temperature and volume increase the accuracy.

Learn more about ideal gas here:

https://brainly.com/question/14552813

#SPJ1

i) Explain why chlorine(1) oxide has a low melting point.

Answers

Answer:

Being a covalent compound, the intermolecular forces between the Cl2O molecules are weak and easily overcome. Therefore little heat energy, in terms of low boiling point is involved.

For an atom electrons, how many energy sublevels are present in the principal energy level n = 4?

Answers

There are 4 energy sublevels are present in the principal energy level n = 4.

What is sublevels?

Sub-level is a type of level that is lower than another level or it is a part or component of a big level. S, p, d and f are the four energy levels in which electrons are present.

So we can conclude that 4 energy sublevels are present in the principal energy level n = 4.

Learn more about energy here: https://brainly.com/question/13881533

#SPJ1

Which law states that at constant temperature the pressure of a given amount of gas is inversely proportional to the volume of the gas?
A.
Combined gas law
B.
Gay-Lussac’s law
C.
Charles’s law
D.
Boyle’s law
E.
Ideal gas law

Answers

Boyle’s law states that at constant temperature the pressure of a given amount of gas is inversely proportional to the volume of the gas. Hence, option D is correct.

What is Boyle’s law?

The volume of a gas at a constant temperature varies inversely with the pressure exerted on it.

Boyle's law states " The pressure of a gas is inversely proportional to the volume occupied by the gas when the temperature(in kelvins) is held constant ".

[tex]P[/tex] ∝ [tex]\frac{1}{V}[/tex]

[tex]PV =CONSTANT[/tex]

This means that with an increase in the volume of gas the pressure exerted by the gas decreases or vice versa. Here variables were pressure and volume.

[tex]P[/tex] ∝ [tex]\frac{1}{V}[/tex]

Boyle’s law states that at constant temperature the pressure of a given amount of gas is inversely proportional to the volume of the gas. Hence, option D is correct.

Learn more about the Boyle’s law here:

https://brainly.com/question/1437490

#SPJ1

Calculate the number of moles of hydrogen chloride produced from 10 moles
of hydrogen.
H₂(g) + Cl₂(g) → 2HCl(g)?

Answers

Answer:

20 moles HCl

Explanation:

To find the final answer, you need to use the mole-to-mole ratio (from the equation) to convert from moles H₂ to moles HCl. Make sure to arrange the ratios in a way that allows for the units of H₂ to cancel out.

1 H₂ (g) + Cl₂ (g) --> 2 HCl (g)

10 moles H₂          2 moles HCl
-------------------  x  ---------------------   = 20 moles HCl
                               1 mole H₂

You have now identified whether crabs are able to see plankton they eat near the ocean floor. Based on your answer, explain how this information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor (what other organisms live at the bottom? How are these able to see their food/ attract food to survive?

Answers

They are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.

How this information can be used to help to understand the environment of the ocean floor?

This information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor because they are able to see the seas floor and can find out other creatures as well.

So we can conclude that they are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.

Learn more about crabs here: https://brainly.com/question/1120881

#SPJ1

True or False?
The same carbon atoms are used repeatedly on Earth.

Answers

Answer:

True

Explanation:

had the same question

ASAP PLS 100 POINTS Which statement best describes the role of oxygen in cellular respiration?
A. Oxygen molecules are a waste product of electron flow.
OB. Oxygen molecules form as ATP molecules are made.
OC. Oxygen molecules form as sugar molecules are broken down.
OD. Oxygen molecules are used to make water molecules.

Answers

It’s A .. I think I hope this helps !

Answer:

Option C

Explanation:

Oxygen molecules form as sugar molecules are broken down.

Sugar or carbohydrates are known as glucose or sucrose and malltose i.e C6H12O6 etc.

So they are broken down by cellular respiration and forms Oxygen for cells

What types of intermolecular forces are important in controlling bio-molecular structure of proteins?
- H-bonding
- Van der Waals
- Dipole Dipole
- All of the above
- None of the above

Answers

Answer:

What types of intermolecular forces are important in controlling bio-molecular structure of proteins?

hydrogen bond

option a

H - bonding

hope it's helpful thanks

What bonds break in the combustion of butane?

Answers

Activation energy
This barrier is due to the fact that to make CO2 and H2O we have to break 4 carbon-hydrogen bonds and some oxygen-oxygen bonds.

Hope this helps!

What is known about a reaction with a positive enthalpy?
A. Heat is given off as a product of the reaction.
B. The reaction has a large activation energy.
OC. Heat is required to make the reaction occur.
OD. The reaction will never be spontaneous.

Answers

Answer: C

Explanation:

In endothermic reactions, enthalpy is positive, and in exothermic reactions, enthalpy is negative, So, if enthalpy is positive, then it is an endothermic reaction, and hence is required for the reaction to occur.

The specific heat of aluminum is approximately
0.90 J/g °C. How much heat energy would be
required to raise the temperature of a 50 g
sample of aluminum from 20 °C to 100 °C?

Answers

Answer:

3600J

Explanation:

Q = mc∆T

= 50 x 0.9 x (100 - 20)

= 3600J

A chemical reaction can be reversed if?

Question 18 options:

The energy of the products is less than the activation energy threshold.


The energy of the products exceeds the activation energy threshold.


The energy of the reactants exceeds the activation energy threshold.


The energy of the reactants is less than the activation energy threshold.

Answers

A chemical reaction can be reversed if the energy of the products exceeds the activation energy threshold.

What are reversible reactions?

Reversible reactions are reactions which can proceed in two directions.

In reversible reactions, reactants can form products and products can also break down to form reactants.

For a chemical reaction to be reversed, the original reaction conditions leading to formation of products are reversed.

Therefore, a chemical reaction can be reversed if the energy of the products exceeds the activation energy threshold.

Learn more about reversible reactions at: https://brainly.com/question/16614705

#SPJ1

The electron configuration of an element is 1s^2 2s^2 2p^6. Describe what most likely happens when an atom of this element comes near an atom having seven valance electrons. (5 points)

Answers

Answer:

In some cases, they could bond to form covalent compounds. However, in most instances they will not interact.

Explanation:

Remember that elements desire to have a full octet (8 valence electrons). The configuration given represents an element with 8 valence electrons. I know this because the outermost shell (denoted by the 2 coefficient) has 8 electrons (2s²2p⁶ = 2 + 6 = 8). Therefore, this element is stable.

The other atom has 7 valence electrons. Since it is 1 electron away from having a full octet, it really wants 1 more electron. The original element is unlikely to give up an electron because that would prevent it from having a full octet. As such, when the atoms are close to one another, they will most likely not interact. The element with the full octet is most likely a noble gas, and these elements rarely form bonds. Noble gases can form bonds with halogens (elements with 7 valence electrons) but only if there are excess halogens and particular noble gases in the system.

The electron configuration of an element is 1s2 2s2 2p6 is Neon with atomic number 10. They either will form covalent bond with other element of does not from bond with any other element.

What is chemical bond?

Chemical bond is defined as any of the interactions that allow for the grouping of atoms into molecules, ions, crystals, and other stable species that make up ordinary substances.

It can also be defined as a connection between atoms in molecules or compounds, as well as between ions and molecules in crystals.

There are basically four types of chemical bond.

Covalent bondIonic bondMetallic bondMolecular bond

Thus, the electron configuration of an element is 1s2 2s2 2p6 is Neon with atomic number 10. They either will form covalent bond with other element of does not from bond with any other element.

To learn more about chemical bond, refer to the link below:

https://brainly.com/question/15444131

#SPJ2


ICI(g) + Cl₂(g) → ICl3(s). The AG(f) of ICI(g) is -5.5 kJ/mol and the
AG(f)° of ICl3(s) is -22.59 kJ/mol
What is the AG of the reaction, in kJ/mol?

Answers

Answer:

KJ8RT898TGHO7-6734354546746R476

Explanation:

The parent element 42 19 K decays by beta decay. Which daughter element will
form?
O A. Ca
OB. 1 Ar
O C. C
OD. K

Answers

Answer: A

Explanation:

This means that the atomic number decreases by 1 but the mass remains constant, meaning the atomic number of the new element is 20. This corresponds to calcium.

Which of the following is the correct set-up for the problem: How many grams of water will be produced from 3.2 moles of oxygen and an excess of C2H4?​

Answers

Option C is the correct set of the problem for mass of water produced by 3.2 moles of oxygen and an excess ethene.

Reaction between oxygen and ethene

Ethene (C2H4) burns in the presence of oxygen (O2) to form carbon dioxide (CO2) and water (H2O) along with the evolution of heat and light.

C₂H₄  + 3O₂   ----- > 2CO₂ + 2H₂O

from the equation above;

3 moles of O₂ ---------> 2(18 g) of water

3.5 moles of O₂ ----------> x

[tex]x = 3.2 \times [\frac{2 \ moles \ H_2O}{3 \ moles \ O_2} ] \times[ \frac{18.02 \ g \ H_2O}{1 \ mole \ H_2O} ][/tex]

Thus, option C is the correct set of the problem for mass of water produced by 3.2 moles of oxygen and an excess ethene.

Learn more about reaction of ethene here: https://brainly.com/question/4282233

#SPJ1

The diameter of a hydrogen atom is 106 pm. Find the length in kilometers of a row of 4.34 x 1023 hydrogen atoms?

Answers

The length in kilometers of a row of 4.34 x 1023 hydrogen atoms is 4.34 x 10¹⁴ km.

Length of the entire hydrogen atoms

The length of the entire hydrogen atom is calculated as follows;

Length of the row = number x diameter of one

Length of the row = 4.34 x 10²³ x 10⁶ x 10⁻¹²

Length of the row = 4.34 x 10¹⁷ m

Length of the row = 4.34 x 10¹⁴ km

Thus, the length in kilometers of a row of 4.34 x 1023 hydrogen atoms is 4.34 x 10¹⁴ km.

Learn more about diameter of hydrogen atom here: https://brainly.com/question/13796082

#SPJ1

discribe a test to distinguish between consentrated HNO3and H2SO4​

Answers

Answer:

https://www.quora.com/What-is-the-difference-between-HNO3-and-H2SO4

Explanation:

HNO3 is a protic acid and H2SO4 is a diprotic acid, this means that while HNO3 donates a single H+ H2SO4 donates 2 H+ ions.

HNO3 is highly volatile as compared to H2SO4.

The components are different, the molecular weights and melting point and boiling points are different.

H2SO4 is dubbed the king of acids because it has a variety of reactions, while HNO3 has quite a few reactions it is not comparable to H2SO4’s

Other Questions
Question 2 of 10Music that has melodies created based on the roll of dice or a random set ofnumbers is called.OA. Fate musicOB. Chance musicOC. Gambling musicOD. Non-linear music Problem is in the picture A surveryor wants to know how many shoppers at a mall like to read books. He surveys 100 people coming out of a bookstore at the mall.Is this sampling method biased?A. YesB. No How large the size of a sample needs to be if we want to a 90% confidence level with a margin of error no more than 1.5% Triangle P Q R is shown. Angle Q P R is a right angle. The length of Q P is 8 StartRoot 3 EndRoot and the length of P R is 8.Consider triangle PQR. What is the length of side QR? Part A? QuestionBoth texts examine the theme that social acceptance threatens one's self-identity. What does the theme reveal aboutboth characters?O Both characters reach the decision that to advance in the world, their old identity must be abandoned.O Both characters move through new social situations without grasping the barriers that limit their acceptance.Both characters are aware of the qualities in their lives that will make social acceptance difficult.O Both characters reach the decision that social acceptance is not something worth valuing if it leads to challenges.Submit Vertical angles are equal in measure.OsometimesOneverO always Find all the missing angles and side lengths What is the type given to aduplicate specimen of orginal type What reaction is 2KCLO3 2KCI + 3O2 Huw has a maths test. the second question is: here is huw's working. 9 days is incorrect. work out the correct answer. Seleccione el nmero que se puededescribir mejor como enteros. The occupants of a vehicle not wearing a seat belt, traveling at a speed of 50 mph and colliding head-on with another vehicle, will Why does each generic business model require a different set of business-level strategies? What is the main role of t cells in the immune response?. What are the answers?? Please help Select the correct answer.Which of the following occurred as a result of the lateral movement of continental plates?OA.Hurricane Katrina in 2005OB.San Francisco Earthquake of 1906O C.volcanic ash covering Pompeii in 79 A.D.OD.eruption of Mt. St. Helens in 1980UndoNext The revenue from selling x necklaces is r(x) =10x. The cost of buying x necklaces is c(x)=4x+15. The profit from selling x necklaces is p(x)=r(x)-c(x). why is it important to know about the impact of colonization on indigenous women in 1876?Giving brainliest:) speech " the only unifying factor "