Do you have evidence from the lab that your calorimeter was not a perfect insulator? Assuming that heat was lost from the calorimeter, describe specifically how that would impact the data you recorded and then chase that change through the calculations to show how the error would impact the calculated enthalpy change for a particular reaction.

In the past, we have done this lab with roughly 50 mL each of each reactant solution, instead of 25 mL. Yet the Δ T determined experimentally were roughly the same. Explain why that is.

Each student will have slightly different volumes of reactants for each reaction. Yet the results obtained for ΔH1, ΔH2, and ΔH3 should be quite similar and would in fact be quite similar for any range of reactants combined within 25-50 mL, provided that each is accurately measured. Explain why this is the case.

A student misreads the volume of one of the solutions as 25.0 mL when in fact it was 35.0 mL. Step through the quantitative consequences of this error on the heat generated, the Δ T observed, the q calculated, and the Δ H calculated. (Clarification: Both solutions “should” be 25.0 mL or something close, and one of the volumes is accidentally 35.0 mL)

A student pours the reaction solutions into a still wet Styrofoam cup. Step through the quantitative consequences of this error on the heat generated, the Δ T observed, the q calculated, and the Δ H calculated.

Answer:

Abiotic factor would be soil.

Biotic factor would be ants.

Explanation:

V = n : M

Mr CaCl₂ : 111 g/mol

n = mole = mass : Mr

V = 15 g/111 g/mol : 2 M

V = 0.068 L

This is known as the law of conservation of mass.

conservation of mass

Answer:T=200k

Explanation: the answer is 200k

Photosynthesis is a process of food and energy production by autotrophs. Water and carbon dioxide in the presence of sunlight gives oxygen and sugar.

Photosynthesis is a biochemical reaction that uses organic and inorganic compounds and converts the molecules with the help of biological organs and substances.

The reactant of the process includes atmospheric water vapours, carbon dioxide and the heat and energy from the sun. These reactants are used by plants and some other organisms.

The organism utilizes the reactants and produces molecules of sugar like glucose and by-product oxygen. These molecules are necessary for the metabolic and respiratory processes.

Therefore, option B. [tex]\rm sunlight + water + carbon\; dioxide \rightarrow oxygen + sugar[/tex] is the correct equation that describes photosynthesis.

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Answer:

a is unbalanced and bcd is balanced

Answer: There are 4.8 x 1024 hydrogen atoms in 2.0 moles of CH4

Answer:

There are 4.8 x 1024 hydrogen atoms in 2.0 moles of CH4 .

Explanation:

Answer:

Convert the 60 and round it up with how ever many bars are above the 60

sorry if this doesnt help

Explanation:

Answer:

There are four types of consumers: omnivores, carnivores, herbivores and decomposers. Herbivores are living things that only eat plants to get the food and energy they need. Animals like whales, elephants, cows, pigs, rabbits, and horses are herbivores. Carnivores are living things that only eat meat.

Explanation:

Answer:

cohesion

Explanation:

just got it right

Answer:

Cohesion

Explanation:

"cohesion: the attraction between molecules within a substance; the tendency of the molecules of a substance to "stick together" or group together" (edge)

Answer/Explanation:

[1] The difference in electron movement between ionic and covalent bonding is ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms.

[2] One way you can predict if a bond would be ionic or covalent based on the location of the elements on the periodic table is  to look how far apart the two atoms forming the bonds are in the periodic table. If one atom is on the far left (Group 1 or 2) and the other is on the far right (Group 5, 6, or 7), then the atoms will have large differences in EN and will form an ionic bond.

[3] You can predict if a bond would be ionic or covalent based on electronegativity is If the electronegativity difference is less than 0.5, then the bond is nonpolar covalent. If the ΔEN is between 1.6 and 2.0 and if a metal is involved, then the bond is considered ionic. If only nonmetals are involved, the bond is considered polar covalent.

[4] In Order for bonds to break in reactants Molecules must collide in order to react. In order to effectively initiate a reaction, collisions must be sufficiently energetic (kinetic energy) to break chemical bonds.

[5]  The height of an object affect the amount of gravitational potential energy it has by gravitational potential energy (P.E) depends on the mass of the body and the height at which it travels, the two quantities will therefore dictate the work done on the object which is eventually the same as  magnitude of the gravitational potential energy P.E. It is assumed that gravitational pull acts toward the earth surface. The more the object move upward the more the work is done on the object to pull it down. We can have different masses of object at different heights, but gravitational field strength will always remain constant on earth.Since the gravitational potential energy P.E depend on the mass of the body and the height at which it travels, the two quantities will therefore dictate the work done on the object which is eventually the same as  magnitude of the gravitational potential energy P.E.

[6] Kinetic energy is a form of energy that an object or a particle has by reason of its motion.Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass.

[7] The connection between kinetic energy and temperature is the relationship between temperature and kinetic energy is that the higher the temperature, the more kinetic energy there is. As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container.

[RevyBreeze]

Explanation:mok in this we learning about sum multiplication on a chart but  it to small but the answer 52

Answer:

1/20

Explanation:

an hour is 60 minutes and its 3 minutes of an hour therefore its 3/60 hour  or 1/20 of an hour

Answer:

soln,

=3×60

=180 answer

Answer:

It becuase it normally does that and normally down the groups number of energy level increases so there a bigger and greater radius

Explanation:

Answer: a

Explanation:

The correct option is A.

n-Propylbenzene is used to prepare benzoic acid. It is employed as a solvent for gas chromatography. It is also used as a solvent and an intermediate in organic synthesis.

n-Propylbenzene is formed inside H-ZSM-11 channels by intermolecular SN2 trans-alkylation between cumene and benzene.

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[tex]\\ \rm\longmapsto Fe_2O_3+3Mg\longrightarrow 3MgO+2Fe[/tex]

0.25mol will produce

Mass of Fe

Reaction:

N₂ (g) + 3 H₂ (g) ---> 2 NH₃ (g)

mol NH₃ = H₂ (limited reactant) :

[tex]\tt \dfrac{2}{3}\times 9=6~moles[/tex]

grams: mol x Mr NH₃ (17 g/mol):

[tex]\tt = 6\times 17=102~g[/tex]

Answer:

Laboratory equipment is generally used to either perform an experiment or to take measurements and gather data. Larger or more sophisticated equipment is generally called a scientific instrument.

Answer:

A liquid

Explanation:

Liquids has an indefinite shape, which means it could change from one shape to another. For example, if you pour water into a rectangular fish tank. The shape of the liquid changes into a rectangle. Definite volume means its volume is consistent and that it is unchangeable. If you fill the rectangular fish tank with water, the volume of the water stays the same even though it changes shape.

Hope this helps.

Answer:

I think B is the right answer.

hope this answer will help you

Dominant

Explanation:

Meaning that particular gene is stronger than the others.

Answer:

Nicotene

Explanation:

Answer:

balanced equation: CH₄ + 2O₂ → CO₂ + 2H₂O

Explanation:

Given sample: CH₄ + O₂ → CO₂ + H₂O

changes applied: CH₄ + 2O₂ → CO₂ + 2H₂O

Answer:

The answer is B                          

Answer: B

Explanation:

The pKa and the fraction of the carboxyl group is mathematically given as

a)  pH= 3.2

b) 1/2 Carboxyl group will give  COO_

Question Parameters:

25 mL of 0.1 M lactic acid (CH, CH(OH)COOH) is titrated with 0.1 M sodium hydroxide (NaOH).

Generally the equation for the pH   is mathematically given as

ph = pka + log [tex]\frac{[sodium lactate]}{[lactic acid]}[/tex]

Therefore

NaOH moles = 1/2 moles of acid then [sodium lactate]

Means

NaOH moles =[lactic acid]

Therefore

pH=pKa

Hence

Volume of NaOH = 12.5 ml

Therefore

pH = pka

pH= 3.2

b)

Generally at pKa =3.2, The 1/2 Carboxyl group will give  COO_

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Answer:

3.6 micrograms answers (c)

Explanation:

[tex]\\ \rm\longmapsto Sn+2Cl_2\longrightarrow SnCl_4[/tex]

Moles of Tin:-

Here

Mass of Tin chloride

[tex]\\ \rm\longmapsto 0.8(189)=151.2g[/tex]

For the cell notation shown, [tex]Ag(s)[/tex] is the species that is undergoing reduction.

Reduction can be defined as a chemical reaction or phenomenon through which the number of electrons or oxidation states associated with the atoms of a chemical element are changed.

This ultimately implies that, reduction is a half-reaction that typically involves decreasing the oxidation number of a chemical species, especially by gaining electrons.

In this scenario, [tex]Ag(s)[/tex] is the species that is undergoing reduction because it is not oxidized and it gains one (1) electron.

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Ag(s)

As here Ag gains one more electron from Ag^+1 so it undergoes reduction