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2 years ago

Somebody please answer this i’ll give brainly

Chemistry

1 answer:

motikmotik2 years ago

4 0

Answer:

number of molecules and the number of moles

Explanation:

Its always same for molcols

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Ca(OH)2 + 2 H2SO4 → CaSO4 + 2 H2O

Pie

Answer:

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Calcium Hydroxide + Sulfuric Acid = Calcium Sulfate + Water

Explanation:

6 0

2 years ago

Read 2 more answers

NO + H2-> N2 + H2O Balance equation?

Oksanka [162]

Answer:

2NO + 4H-> N2 + 2 H2O

Explanation:

Both sides must be equal. :)

5 0

3 years ago

3. Give one example of an element and one

zhenek [66]

Answer:

Element: H (hydrogen)

Compound: H2O (water)

Explanation: An element is made up of a singular atom while a compound is made up of 2 or more

7 0

3 years ago

Calculate the number of moles of a gas that is present in a 7.55 L container at 45°C, if the gas exerts a pressure of 725mm Hg.

vovikov84 [41]

Answer: The number of moles of gas present is 0.276 moles

Explanation:

To calculate the number of moles of gas, we use the equation given by ideal gas:

PV = nRT

where,

P = Pressure of the gas = 725 mm Hg

V = Volume of the gas = 7.55 L

n = number of moles of gas = ?

R = Gas constant = $62.3637\text{ L.mmHg }mol^{-1}K^{-1}$

T = Temperature of the gas = $45^oC=(45+273)K=318K$

Putting values in above equation, we get:

$725mmHg\times 7.55L=n\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 318K\\\\n=0.276mol$

Hence, the number of moles of gas present is 0.276 moles

4 0

3 years ago

What element came from of the chemist who first published the periodic table?

Andrew [12]

Dmitri Mendeleev published first the periodic. He didn't "discover" any elements but predicted where some would be on his table. These included Gallium and Germanium.

6 0

3 years ago