Answer:
The penny now weighs 0.0025kg
Hope this helps please give me brainliest!
God bless!
The maximum number of electrons that can fill the second energy level
Answer:
8
Explanation:
How many atoms of each element are in one molecule of 2-heptanone?
Name this element.
i need the answer like now
what is the formula for sulfuric acid
Answer:
H₂SO₄
Explanation:
Hope this helps!
A cup of hot water contains fewer molecules than a tub of hot water. This same cup of hot water will freeze faster than a tub of hot water. The total thermal energy of a system is not only dependent on the state of the material but also on the (resistance, heat, temp, half-life) and the total number of (atoms, currents, compounds, electromagnetic waves) in the system.
Answer:
The correct options are;
1) Heat
2) Atoms
Explanation:
The heat required to raise a unit mass of a substance by one degree which is the specific heat capacity of the substance, is a quantity characteristic of a given substance and the amount of temperature change experienced by the substance when an amount of heat energy transferred to the substance is a function of the mass of the substance, which is a function of the number of atoms present in the substance.
So also, the total thermal energy that is stored by a substance, that causes a given amount of temperature change, is a function of the heat capacity of the substance.
true or false there is a risk of explosion in factories handling powders such as custard powder
Answer:
True? I think so At least
Explanation:
Which two elements make up household ammonia?
A. neon and
helium
B. neon and
hydrogen
C. nitrogen and
helium
D. nitrogen and
hydrogen
ordt
English (US
Answer:
D. Nitrogen and Hydrogen
Explanation:
Answer: d
Explanation: took test
why does the moon shine
Answer:
The moon reflects light from the sun making it appear bright in the sky.
Explanation:
Answer: Its a reflection of the sun's light
Explanation: the light from the sun bounces off of the moon
What would be the phenotypes of the offspring?
The first chemists, philosophers like, Aristotle were from which country?
Answer:
greece
Explanation:
aristole was particularly from stagria, greece. but most early philosophers are from greece
Air is a mixture of different gases like nitrogen and oxygen. Carbon dioxide is the most important contributor to human-caused global warming. _________________ _________________ Forest fires and cities with lots of car traffic cause air pollution.
3. In an exercise to teach students how to use and analytical balance, the instructor
gives a student a quarter which has been pre-weighed as 5.6026 g. The weight that the
student obtains for the same quarter is 5.6013 g. What is the percent error in the
students reading?
Answer:
The percent error is 0.023%.
Explanation:
Pre-weighed of a quarter is 5.6026 g.
The weight that the student obtains for the same quarter is 5.6013 g.
We need to find the percent error in the students reading. It is given by the formula as follows :
[tex]\%=\dfrac{|\text{original value-calculated value}|}{\text{original value}}\times 100[/tex]
Putting all the values, we get :
[tex]\%=\dfrac{5.6026 -5.6013 }{5.6026 }\times 100\\\\\%=0.023\%[/tex]
So, the percent error is 0.023%.
Which of the following elements has the lowest ionization energy?
A. chlorine (CI)
B. potassium (K)
C. magnesium (Mg)
D.neon (Ne)
Answer:
B. Potassium
Explanation:
Potassium
HELP ME PLEASE WILL MARK BRAINLIEST! DUE AT 8PM TODAY1. What is the unit of measure for the graduated cylinder? What is the maximum it can measure? What is the minimum measurement?
2. Look at the smallest division on the graduated cylinder. What amount does the smallest division measure?
3.
What are the units of measure on the plastic cup? What is the maximum amount it can measure? What is the minimum measurement?
Answer:
1. Is fortnite travis scott burger
2. Beetlejuice the second
3. The measurement is 69420
Explanation:
my mom told me
5. The diagram above shows what happened when an irregular solid was immersed in water. This irregular solid has the same mass as a gold block, which is 2 cm wide by 2 cm high by 5 cm long. Using the method described in the passage, compare the density of the unknown with the density of gold.
A. Equal to gold
B. Less than gold
C. Greater than gold
D. Cannot be determined
The density of the unknown will be greater than the density of gold.
An overview will be given since the diagram isn't given. The formula to calculate the density of an irregular shape will be the mass divided by the volume.
The density is the mass per volume. From the information given, since they've the same mass, then it means that the volume of the gold will be more than the volume of the unknown. Therefore, the density of the unknown will be greater than gold.
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Prototypes are used to
a. communicate a solution.
b. test the operation of a product.
c. identify a need.
d research a problem.
Answer:
Test the operation of the product
Explanation:
1. The ability to dissolve in water and to conduct
electricity are examples of
a. physical properties.
b. chemical changes.
c. chemical properties.
d. chemical bonding.
Answer:
Physical
Explanation:
Because thats the answer
Answer question number 4
Answer: Choice A
Explanation:
Why Hund's Rule is called maximum spin multiplicity rule?
Answer:
The rule states that for a given electron configuration, the lowest energy term is the one with the greatest value of spin multiplicity. This implies that if two or more orbitals of equal energy are available, electrons will occupy them singly before filling them in pair
Explanation:
which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect?
Answer:
Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect? Energy of electrons depends on light's frequency, not intensity. A change in which property of light will have no effect on whether or not the photoelectric effect occurs?
Explanation:
Name five elements of the Periodic Table and name three properties for each element listed. For example, Oxygen: polarity.
Organizing information in a meaningful way is an example of what?
Answer:
Observation
Explanation:
In chemistry a chemist conducts an experiment and he/she concludes some points and arranges information about his/her experiment can be called observation or result
Organizing information in a meaningful way is an example of good management and the proper establishment of the research parameters.
In research, the correct organization of information is of the utmost importance.Information is the key to get proper results during research.That is why researchers must be very careful in the way they handle information.Proper sources should be taken into consideration to do research.The information obtained should be correctly organized and classified, according to the framework of research. This meaningful organization is key to the following interpretation of results.We conclude that organizing information in a meaningful way is an example of the proper control and follow-up process in research to interpret data and have valid conclusions.Learn more about this topic here:
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at room temperature oxygen gas travels at 393.5 meters per second. How fast does oxygen travel in mile per hour ?
Answer:
Oxygen travels in 1,416,600
Explanation:
True or false? The mass number of an atom equals the sum of the protons and
electrons.
Answer:
false, it is the number of protons and neutrons
Explanation:
how does litmus indicator work
Help it’s for a test!!!!!!!!!!!How many moles are in 2.16 x 1023 atoms of magnesium?
A. 35.9 moles
B. .359 moles
C. 7.18 moles
D. 0.359 moles
E. 0.90 moles
after eating an apple and levaing it on top of the table. what will happend to the color of the inner part of the apple? what makes the color of the apple change
Answer:
Answer Below
Explanation:
When you leave an apple on a table outside it will turn brown. This happens because when you cut an apple, you are exposing it's insides to the oxygen in the air. This causes the PPO (polyphenol oxidase) enzyme in the apple's flesh to oxidize the polyphenols, turning them into some other brown colored products. Hence, the color change.
Answer:
brown i can't explain because its a matter of the atoms in the apple mixing with the air and apple is made with nitrogen
Write a complete, balanced chemical equation where tin metal reacts with aqueous hydrochloric acid to produce tin(II) chloride and hydrogen gas. Include states.
From the equation, which element is oxidized, and which element is reduced?
Answer:
1. The balanced equation is given below:
Sn (s) + 2HCl (aq) –> SnCl₂ (aq) + H₂ (g)
2a. H is oxidized.
2b. Sn is reduced.
Explanation:
1. Balanced equation for the reaction between tin (Sn) metal and aqueous hydrochloric acid (HCl) to produce tin(II) chloride (SnCl₂) and hydrogen gas (H₂).
This is illustrated below:
Sn (s) + HCl (aq) –> SnCl₂ (aq) + H₂ (g)
There are 2 atoms of Cl on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HCl as shown below:
Sn (s) + 2HCl (aq) –> SnCl₂ (aq) + H₂ (g)
Now, the equation is balanced
2. Determination of the element that is oxidize and reduced.
This can be obtained as follow:
We shall determine the change in oxidation number of each element.
NOTE:
a. The oxidation number of H is always +1 except in hydrides where it is –1.
b. The oxidation state of Cl is always –1.
Sn (s) + 2HCl (aq) –> SnCl₂ (aq) + H₂ (g)
For Tin (Sn):
Sn = 0
SnCl₂ = 0
Sn + 2Cl = 0
Cl = – 1
Sn + 2(–1) = 0
Sn – 2 = 0
Collect like terms
Sn = 0 + 2
Sn = +2
Therefore, the oxidation number of Tin (Sn) changes from 0 to +2
For H:
H = +1
H₂ = 0
The oxidation number of H changes from +1 to 0
For Cl:
Cl is always –1. Therefore no change.
Summary:
Element >>Change in oxidation number
Sn >>>>>>>From 0 to +2
H >>>>>>>>From +1 to 0
Cl >>>>>>>No change
Therefore,
Sn is reduced since its oxidation number increased from 0 to +2.
H is oxidized since it oxidation number reduced from +1 to 0
The balanced chemical equation for the reaction is
Sn(s) + 2HCl(aq) → SnCl₂(aq) + H₂(g)
and the element that oxidized is tin (Sn) while the element that is reduced is hydrogen (H)
The balanced chemical equation for the reaction where tin metal reacts with aqueous hydrochloric acid to produce tin(II) chloride and hydrogen gas is
Sn(s) + 2HCl(aq) → SnCl₂(aq) + H₂(g)
From the equation,
The element that is oxidized is tin (Sn), because the oxidation state of Sn increased from 0 to +2
The element that is reduced is hydrogen (H), because the oxidation state of H decreased from +1 to 0.
Hence,
The balanced chemical equation for the reaction is
Sn(s) + 2HCl(aq) → SnCl₂(aq) + H₂(g)
and the element that oxidized is tin (Sn) while the element that is reduced is hydrogen (H).
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what are the units for the volume of a solid volume of a liquid
Answer:Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.
Explanation:
An object has a mass of 4 grams and a volume of 2 cm3. What is the density of the object
Answer:
The answer is 2.0 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 4 g
volume = 2 cm³
We have
[tex]density = \frac{4}{2} \\ [/tex]
We have the final answer as
2.0 g/cm³Hope this helps you
Answer:
D = 2 g/cm³
Explanation:
Density = mass over volume
D= m/v
Step 1: Define
m= 4 grams
v= 2 cm³
Step 2: Substitute and Evaluate
D= 4 g/2 cm³
D= 2 g/cm³