The fertilizer ammonium sulfate, (nh4)2so4, is prepared by the reaction between ammonia (nh3) and sulfuric acid: 2nh3(g) + h2so4(aq) ? (nh4)2so4(aq) how many kilograms of nh3 are needed to produce 3.60 × 105 kg of (nh4)2so4?


Answer 1
Answer: The chemical reaction would be:

2nh3(g) + h2so4(aq) = (nh4)2so4(aq)

To determine the ammonia needed, we use the given amount of the product to be produced and use the chemical equation to relate the substances. We do as follows:

3.60 × 105 kg (nh4)2so4 ( 1 kmol / 132.14 kg ) ( 2 kmol NH3 / 1 kmol (nh4)2so4 ) (17.04 kg / 1 kmol ) = 92846.98 kg NH3 needed

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What Type of reaction is this equation
C2H5S + O2 ---> CO2 + H2O + SO2


I think it might be a decomposition.
The answer is decomposition

A particular atom of an element has a mass number of 15. There are 10 electrons in the -3 ion of the atom. Identify the element, using the correct element symbol, the number of protons and number of neutrons in this atom.




7 protons

8 neutrons


The -3 ion of the atom principal means that the atom has received 3 extra electrons to become electrically charged negatively. Hence, before it has received 3 electrons. We need to know that the original number of electrons is 7.

For an electrically neutral atom, the number of protons is equal the number of electrons. This means that the number of protons is 7

An element could be identified by using the number of protons which is the atomic number. This means that the atomic number of the element is 7 and consequently the element in question is nitrogen N.

Now, we can obtain the number of neutrons since we now know the number of protons and the mass number. The number of neutrons is thus the mass number minus the atomic number or number of protons. This is this 15 -7 = 8

The number of neutrons is thus 8


Refrigerators are usually kept at about 5°C, while room temperature is about 20°C. if you were to take an empty sealed 2 liter soda bottle at room temperature and place it in the fridge, would you expect it to contact to one fourth it's original volume? options. (a) yes, because 5 is one fourth of 20.
(b) No, because there is no gas inside the bottle.
(c) No, because Celsius is not an absolute temperature scale.



c) No, because Celsius is not an absolute temperature scale


converting  5 oC to kelvin which is the absolute temperature scale gives = 273 + 5 = 278 K

and converting 20 oC to kelvin = 20 + 273 = 293 K

the ratio = 278 / 293 = 0.94 approx 1 not 4


What is the oxidation number of chromium in K2Cr2O7?(1) +12 (3) +3(2) +2 (4) +6


(4) +6 is your answer.
Oxygen has an oxidation number of -2, and Potassium, as an alkali metal, has a oxidation number of +1. There are 7 Oxygen atoms and 2 Potassium atoms, therefore it has a change of -14 + 2 = -12. Since the oxidation number for this entire compound is 0, we know that the two Chromium atoms have oxidation number sums adding up to 12, since it has to balance out the -12. 12/2 = 6, so the Chromium atoms each have +6 as their oxidation number.

As you move from ice to water to steam, which statement is true? A) Temperature, density, and compressibility all increase.
 B) Temperature, kinetic energy, and compressibility all increase.
 C) Temperature and compressibility increase as molecular motion decreases.
 D) Temperature and kinetic energy increases while compressibility decreases.


Answer: Option (B) is the correct answer.


It is known that when ice changes to water then intermolecular forces between the atoms decreases and they move away from each other because they are absorbing energy.

As a result, solid state changes into liquid state.

Whereas when liquid state of water changes into steam then molecules move further apart from each other as intermolecular forces further decrease due to increase in temperature there will also be increase in kinetic energy.

Hence, compressibility will also increase.  

Therefore, we can conclude that as you move from ice to water to steam,  temperature, kinetic energy, and compressibility all increase.

Temperature, kinetic energy, and compressibility all increase.

How many oxygen atoms are in three moles of NaCO3


If you think about it, it is really simple. Na stands for Sodium. C stands for Carbon and O stands for Oxygen. Whenever it is a capital letter, it indicates a new element. The number next to the letter indicates how many atoms are there. This means that there are 3 atoms for O. If there is no number, then it indicates that there is only 1 atom. 1 for Na, and 1 for C, making it a total of 5 atoms. But to answer your question, there are 3 oxygen atoms.
There is 1.81x10∧24 Atoms of O2 in 3 Moles of NaCO3

(need 12) project due monday! what are things we use in everyday life that contain minerals (please list the minerals) <3


We use Granite counter tops

We take vitamins 

We use salt.

How many miles of carbon dioxide gas can be produced if 25 g of cr2(co3)3 are reacted with excess nitric acid hno3 ?



0.264 moles of carbon dioxide are produced.


Limiting reagent : The reactant that is consumed in a reaction is called the limiting reagent.

Molar mass = mass of substance  in grams present in 1 mole of the compound.

before solving this question,

It is needed to know , the molar mass of  cr2(co3)3 and CO2

Molar mass of  cr2(co3)3  = 2(mass of Cr) + 3(massof C) + 9(mass of O)

                                           = 2(52) + 3(12) + 9(16)

                                          = 104 + 36 + 144

                                          = 284 g

This means 1 mole of  cr2(co3)3  = 284 g............(1)

Molar mass of CO2 = mass of C + 2(mass of O)

                                  = 12 + 2(16)

                                  = 12 + 32

                                  = 44 g

This means 1 mole of CO2 contain 44 g of it.

So, 3 mole of CO2 contain = 44x3 g

3 mole of CO2 contain = 132 g.............(2)

The balance equation for the reaction is :

HNO3 = excess reagent , it can't be used in for predicting the moles of CO2

= Limiting reagent = It will tell the amount of CO2 that will be produced

In the balanced equation ,

1 mole of cr2(co3)3  is giving = 3 mole of CO2

Use equation (1) and (2)

284 g of cr2(co3)3  is giving = 132 g of CO2

1 gram of cr2(co3)3  is giving =

g of CO2

25 g of cr2(co3)3 will give =

g of CO2

= 11.62 gram CO2

now , moles of CO2 can be calculated using ,

     (molar mass of co2 = 44 g)

moles of CO2 = 0.264


Which statement best describes the climate of a specific place?



Typical summer weather is hot and dry, and winter weather is cold and snowy.


I believe it is its distance from the equator but it would help if I had the answer choices.
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