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3 years ago

Sally does the work in 2.3 hours and Pete does 2.5

Chemistry

2 answers:

Yuri [45]3 years ago

5 0

Pete because 2.5 x 2.3 is faster

Ipatiy [6.2K]3 years ago

5 0

I agree with the other comment

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How many moles of hydrogen gas are needed to produce 20 grams of hydrochloric acid (HCl)?

Charra [1.4K]

Answer:

0.27 mole

Explanation:

Data given:

mass of hydrochloric acid (HCl) = 20 g

moles of hydrogen (H₂O) = ?

Solution:

First we look to the reaction in which hydrogen react with Chlorine and make hydrochloric acid (HCl)

Reaction:

H₂ + Cl₂ -----------> 2HCl

Now look at the reaction for mole ratio

H₂ + Cl₂ -----------> 2HCl

1 mole 2 mole

So it is 1:2 mole ratio of hydrogen to hydrochloric acid (HCl)

As we Know

molar mass of H₂ = 2(1) = 2 g/mol

molar mass of HCl = 1 + 35.5 = 36.5 g/mol

Now convert moles to gram

H₂ + Cl₂ -----------> 2HCl

1 mole (2 g/mol) 2 mole (36.5 g/mol)

2 g 73 g

So,

we come to know that 2 g of hydrogen gives 73 g of hydrochloric acid (HCl) then how many grams of hydrogen will be required to produce 20 grams of hydrochloric acid (HCl).

Apply unity formula

2 g of H₂ ≅ 73 g of HCl

X g of H₂ ≅ 20 g of HCl

Do cross multiplication

X of H₂ = 2 g x 20 g / 73 g

X of H₂ = 0.55 g

Now convert grams of H₂ into moles

No. of moles = mass in grams/molar mass

Put values in above formula

No. of moles = 0.55 g / 2 (g/mol)

No. of moles = 0.27 mol

0.27 mole of hydrogen needed to produce 20 gram of hydrochloric acid (HCl).

7 0

3 years ago

Which of the following specifies the correct reducing agent in the given redox reaction? View Available Hint(s) Which of the fol

padilas [110]

Answer: $NiO+CO\rightarrow Ni+CO_2$ : reducing agent is CO.

Explanation:

a) $Fe+Cu^{2+}\rightarrow Fe^{2+}+Cu$

The oxidation state of copper reduces from +2 to 0, it is getting reduced. As $Cu^{2+}$ gets reduced, it acts as an oxidising agent.

The oxidation state of iron increases from 0 to +2. Thus, it is getting oxidized. As $Fe$ gets oxidized, it acts as a reducing agent.

b. $2Na+Cl_2\rightarrow 2NaCl$

The oxidation state of chlorine reduces from 0 to -1, it is getting reduced. As $Cl_2$ gets reduced, it acts as an oxidising agent.

The oxidation state of sodium increases from 0 to +1. Thus, it is getting oxidized. As $Na$ gets oxidized, it acts as a reducing agent.

c. $C+O_2\rightarrow CO_2$

The oxidation state of oxygen reduces from 0 to -2, it is getting reduced. As $O_2$ gets reduced, it acts as an oxidising agent.

The oxidation state of carbon increases from 0 to +2. Thus, it is getting oxidized. As $C$ gets oxidized, it acts as a reducing agent.

d. $NiO+CO\rightarrow Ni+CO_2$

The oxidation state of nickel reduces from +2 to 0, it is getting reduced. As $Ni^{2+}$ gets reduced, it acts as an oxidising agent.

The oxidation state of carbon increases from +2 to +4. Thus, it is getting oxidized. As $CO$ gets oxidized, it acts as a reducing agent.

3 0

4 years ago

Simple cell?

poizon [28]

Answer:

I don't know..but plz follow me

4 0

3 years ago

Potassium Oxide + Calcium Chlorate react to form what (double replacement)

Dennis_Churaev [7]

They would react to form:

Potassium Chlorate + Calcium Oxide

Here is an attachment with the skeleton equation and balance:

3 0

3 years ago

Which of the following describes the distribution of sodium and potassium between cells and body

S_A_V [24]

You’re answer would be B love!

5 0

3 years ago