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3 years ago

How many moles of water will be produced from the reactions 3.25 moles of hydrochloric acid react with excess calcium hydroxide

Chemistry

1 answer:

alina1380 [7]3 years ago

4 0

Answer:

3.25 moles of H2O

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

2HCl + Ca(OH)2 —> CaCl2 +2H2O

Now, we can obtain the number of mole H2O produced from the reaction as follow:

From the balanced equation above,

2 moles of HCl reacted to produce 2 moles of H2O.

Therefore, 3.25 moles of HCl will also react to produce 3.25 moles of H2O.

Therefore, 3.25 moles of H2O were produced from the reaction.

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How many H atoms are in 6.43g x 10^24 molecules of water

kow [346]

Answer:

$12.86\times 10^{24}$ atoms of hydrogen

Explanation:

The molecular formula for a water molecule is $H_2O$ .

From the above formula, we can conclude that 1 molecule of water contains 2 atoms of hydrogen and 1 atom of oxygen.

There are $6.43\times 10^{24}$ molecules of water.

1 molecule of water = 2 atoms of hydrogen.

∴ $6.43\times 10^{24}$ molecules of water = $2\times 6.43\times 10^{24}=12.86\times 10^{24}$ atoms of hydrogen.

Therefore, there are $12.86\times 10^{24}$ atoms of hydrogen in $6.43\times 10^{24}$ molecules of water.

5 0

3 years ago

A sample of nitrogen gas, stored in a 2.96-L container at 32.0°C, exerts a pressure of 4.27 atm. Calculate the number of moles o

inysia [295]

Answer: The number of moles of nitrogen gas is 0.505 moles.

Explanation:

To calculate the number of moles of nitrogen gas, we use ideal gas equation, which is:

$PV=nRT$

where,

P = pressure of the gas = 4.27 atm

V = Volume of the gas = 2.96 L

T = Temperature of the gas = $32.0^oC=[32.0+273]K=305K$

R = Gas constant = $0.0821\text{ L. atm }mol^{-1}K^{-1}$

n = number of moles of gas = ?

Putting values in above equation, we get:

$4.27atm\times 2.96L=n\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 305K\\n=0.505mol$

Hence, the number of moles of nitrogen gas is 0.505 moles.

6 0

4 years ago

Read 2 more answers

2Na(s) + 2H,O(l) — 2NaOH(?) + H, (g) 0 what is the missing symbol

Klio2033 [76]

Answer:

the symbol that is missing might be 2.

Explanation:

I am not 100% on this, so correct me if I am wrong.

3 0

3 years ago

What is the empirical formula of a compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and 77.39% oxygen (O) by mass?

blsea [12.9K]

CH2O3

C=19.36\12 = 1.61
H=3.25\1.008 =3.22
O=77.39\16=4.83

then dived the moles with the smallest mole

C=1.61\1.61=1
H=3.22\1.61=2
O=4.83\1.61=3

E.F
CH2O3

8 0

3 years ago

Read 2 more answers

Nếu có 40g dung dịch NaOH 20% phairn dùng hết bao nhiêu gam dung dịch HCl 25% để trung hoà

worty [1.4K]

Answer:

nếu có 40g dung dịch NaOH 20% phairn dùng hết bao nhiêu gam dung dịch HCl 25% để trung hoà

6 0

3 years ago