3 years ago

Number of moles of 25 grams of HF

Chemistry

1 answer:

Marizza181 [45]3 years ago

6 0

N=m/M

so n = 25g/(1.01+19.00)g/mol

n = 25g/20.01g/mol

n = 1.2493

Round to 2 sig figs

So the answer is 1.2 mol

You might be interested in

What is the volume in liters of hydrogen gas that would be produced by the reaction of 40.0 g of Al with excess HCl at STP accor

DaniilM [7]

The volume in liters of Hydrogen gas = 49.28 L

<h3>Further explanation </h3>

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products

Reaction

2 Al (s) + 6 HCl (aq) → 2 AlCl₃ (aq) + 3 H₂ (g)

mol Al :

$\tt mol=\dfrac{mass}{Ar}=\dfrac{40}{27}=1.481$

mol H₂ :

$\tt \dfrac{3}{2}\times 1.481=2.2$

At STP, 1 mol =22.4 L

so the volume of hydrogen :

$\tt 2.2 \times 22.4=49.28~L$

8 0

2 years ago

Read 2 more answers

Write the balanced equation for the burning of nonane, c9h20, in air.

Ivanshal [37]

C9H20 + 14O2 --> 9CO2 + 10H2O

3 0

3 years ago

Help me with chemmm!!!

Lisa [10]

srry the pic is not clear......

l cant see it.....

7 0

3 years ago

If 10.0 g water at 0.0°C is mixed with 20.0 g of water at 30.0°C what is the final temperature of the mixture?

Bond [772]

Answer:

1.67 gradius Celcius

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

7 0

3 years ago

How do you explain reaction of stiochiometry

Mama L [17]

Answer:

Chemical reactions are balanced by adding coefficients so that the number of atoms of each element is the same on both sides. Stoichiometry describes the relationship between the amounts of reactants and products in a reaction.

Explanation:

3 0

3 years ago