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3 years ago

What is molecular formula

Chemistry

2 answers:

Vilka [71]3 years ago

4 0

Answer:

a formula giving the number of atoms of each of the elements present in one molecule of a specific compound.

Mazyrski [523]3 years ago

3 0

Answer:a formula giving the number of atoms of each of the elements present in one molecule of a specific compound.

Explanation:

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What is the volume at stp of 720.0 ml of a gas collected at 20.0 °c and 3.00 atm pressure?

MArishka [77]

Combined gas law is
PV/T = K (constant)

P = Pressure
V = Volume
T = Temperature in Kelvin

For two situations, the combined gas law can be applied as,
P₁V₁ / T₁ = P₂V₂ / T₂

P₁ = 3.00 atm P₂ = standard pressure = 1 atm
V₁ = 720.0 mL T₂ = standard temperature = 273 K
T₁ = (273 + 20) K = 293 K

By substituting,
3.00 atm x 720.0 mL / 293 K = 1 atm x V₂ / 273 K
V₂ = 2012.6 mL

hence the volume of gas at stp is 2012.6 mL

5 0

2 years ago

i need help with these. its balancing. the blank spaces are where u put the numbers. and the stuff on the sidd is how u show wor

zlopas [31]

7. 1,2,2,2
8. 4,3,1
9. 1,4,1,2
10. 3,4,1,4

7 0

2 years ago

Calcium is added to water,the liberated gas is

vlabodo [156]

Answer:

In both cases, the gas evolved is H2. When calcium reacts with water the heat evolved is not suffcient for hydrogen to catch fire. On the other hand, sodium metal reacts with water violently and in this case a lot of heat is evolved which is sufficient for hydrogen to catch fire.

Explanation:

may this answer is helpful for you

4 0

2 years ago

Read 2 more answers

Is the production of nitrogen(II) oxide exothermic or endothermic?

LuckyWell [14K]

It’s a exothermic reaction.

3 0

1 year ago

Determine the formula of chromic acid.

Katyanochek1 [597]

Answer: The formula of chromic acid is $H_2CrO_4$

Explanation:

We are given an ionic compound named as chromic acid. This acid is formed by the combination of hydrogen ion and chromate ion.

An acid is defined as the substance which releases hydrogen ion when dissolved in water.

Hydrogen is the 1st element of periodic table having electronic configuration of $1s^1$ .

This element will loose 1 electron to form $H^{+}$ ion.

Chromate ion is a polyatomic ion having chemical formula of $CrO_4^{2-}$

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

So, the chemical formula for the given compound is $H_2CrO_4$

Thus, the formula of chromic acid is $H_2CrO_4$

8 0

2 years ago