If 37.4 grams of water decompose at 297 Kelvin and 1.30 atmospheres, how many liters of oxygen gas can be produced? Show all of the work used to solve this problem. 2H2O (l) yields 2H2 (g) + O2 (g)

Answers

Answer 1

Answer: To determine the liters of oxygen gas, we convert the 37.4 grams of water to moles, which is 2. 078 moles. The moles oxygen is half the moles of water which is equal to 1.039 moles. Using ideal gas equation, PV=nRT, we get the volume from the given temperature and pressure. The volume is 19.49 liters.

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How many grams of solute are present in 615 ml of 0.630 m kbr?

Answers

molarity is the number of moles of solute in 1 L of solution
molarity of KBr solution is 0.630 M
this means that there there are 0.630 moles of KBr in 1 L solution
then in 615 mL number of KBr moles are - 0.630 mol/L x 0.615 L = 0.387 mol
mass of KBr is - molar mass x number of moles
KBr molar mass is 119 g/mol x 0.387 mol = 46.1 g
mass of KBr is 46.1 g

Is americium a solid, liquid or gas

Answers

Americium at standard temperature and pressure is solid. This element is a radioactive one and is a member of the actinide group. It was first produced by the group of Glenn T. Seaborg. It common application is in household smoke detectors.

A body moving with a velocity of 20 m/s begins to accelerate at 3 m/s2. How far does the body move in 5 seconds?A. 137.5 m
B. 196 m
C. 260 m
D. 162.5 m

Answers

The distance covered will be:

$d = v_0\cdot t + (1)/(2)a\cdot t^2 = 20(m)/(s)\cdot 5\ s + (5)/(2)(m)/(s^2)\cdot 5^2\ s^2 = \bf 162,5\ m$

The correct answer is D).

The Correct answer to this question for Penn Foster Students is: 137.5 m

How many grams of methane are needed to form 33.6 L of carbon dioxide

Answers

If you suppose standard temperature and pressure, 1 mol = 22.4 liters.

33.6 liters* 1mol/22.4liters = 1.5 mols.

Molar mass of carbon dioxide: 12 g/mol + 2x16 g/mol = 44 g/mol

Mass of 1.5 mols = 1.5mol * 44 g/mol = 66 g.

List two general properties of molecular compounds

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Molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.

What are molecular compounds?

Any substance made up of similar molecules with atoms from two or more different chemical elements is referred to as a chemical compound. Atoms from more over 100 specific chemical elements, both in their pure forms and when mixed to form chemical compounds, make up all matter in the universe.

For instance, the atoms that make up carbon differ from those which make it up iron, which differ from the ones that make up gold. Molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.

Therefore, molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.

To know more about molecular compounds, here:

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Low melting points and boiling points. ...Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.Soft or brittle solid forms. ...Poor electrical and thermal conductivity.

Food is shipped thousands of miles throughout our country using various types of transportation such as trucks, planes, and boats. Food availability would be most affected by a shortage in which of the following energy sources? Coal Natural gas Petroleum Water power

Answers

The correct answer for this would be the third option: PETROLEUM. So when food is shipped thousands of miles throughout our country using various types of transportation such as trucks, planes, and boats, food availability would be most affected by a shortage of PETROLEUM. Petroleum is the energy that is used to operate trucks, planes and boats. Hope this answers the question.

Answer: Petroleum

Explanation:

Petroleum is a fossil fuel. It is also called as crude oil. It is a yellowish black liquid that can be found beneath the earth crust. It is a highly combustible fuel and generates lot of heat energy necessary for running the vehicle. It is the most commonly used fuel for shipping, and road transportation of goods and services. It helps the vehicles to run for long and covering the large distance.

The food availability would be affected by the shortage in absence of petroleum.

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