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Chemistry

2 answers:

vampirchik [111]3 years ago

6 0

Answer:

What's up CRAZYMILOU!!!!!!!!!!!!

____ [38]3 years ago

3 0

Hello, how are you? ¯\_(ツ)_/¯

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PLEASE ANSWEER THIS HURRY HURRRRRRRRRYY

klemol [59]

The first one would be it

6 0

3 years ago

why would dry cleaners use nonpolar tetrachloroethylene, c2cl4, to get cheeseburger grease out of clothes?

Sergeeva-Olga [200]

Grease is nonpolar. It is made up of lengthy hydrocarbon chains attached to glycerol (triacylglycerols). Because of this property, nonpolar solvents, such as tetrachloroethylene, can get grease out of clothes. This solvent acts by dissolving the grease, thereby removing it from clothes without leaving any residue.

3 0

3 years ago

Read 2 more answers

How many moles of nitrogen gas are there in 16.8 L of this gas at STP?

sweet-ann [11.9K]

According to Avogadro's Law, same volume of any gas at standard temperature and pressure will occupy same volume. And one mole of any Ideal gas occupies 22.4 dm³ (1 dm³ = 1 L).

Data Given:

n = moles = ?
V = Volume = 16.8 L

Solution:
As 22.4 L volume is occupied by one mole of gas then the 16.8 L of this gas will contain....

= ( 1 mole × 16.8 L) ÷ 22.4 L

= 0.75 moles

Result:
16.8 L of Nitrogen gas will contain 0.75 moles at standard temperature and pressure.

4 0

3 years ago

Describe the overall enthalpy of the chemical reactants compared to the enthalpy of the chemical products in the combustion of p

Veronika [31]

Answer:

A thermochemical equation for the combustion of propane (C3H8)(C3H8) is written as follows:

C3H8(l)+5O2(g)→3CO2(g)+4H2O(g);ΔH∘rxnC3H8(l)+5O2(g)→3CO2(g)+4H2O(g);ΔHrxn∘ = -2202.0 kJ/mol

The value given for ΔH∘rxnΔHrxn∘ means that:

a. the reaction of one mole of propane absorbs 2202 kJ of energy from the surroundings.

b. the reaction is endothermic.

c. the enthalpy of formation of propane is 2202 kJ/mol.

d. the reaction of one mole of propane releases 2202 kJ of energy to the surroundings.

e. None of these.

3 0

1 year ago

Define unit hi hope u have a great day

Crank

Answer:

Unit is the quantity of a constant magnitude which is used to measure the magnitudes of other quantities of the same nature. 

Explanation:

6 0

3 years ago