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3 years ago

The molecular weight of vitamin C, CH06, is

Chemistry

1 answer:

icang [17]3 years ago

7 0

Mass = molecular mass x mol

mass = 176.128 x 0.000142

mass = 0.025 g (3 s.f)

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How many nitrogen atoms are in 2.79 mo.of NH3

alexandr1967 [171]

1 mol of any particles has 6.02 * 10 ²³ particles.

If we look at 1 NH3 (1 mol NH3 or 1 molecule NH3), we can see that 1 molecule NH3 has 1 atom of N and 3 atoms of H; also 1 mole of NH3 has 1 mole of N atoms and 3 moles of H atoms.

So, 1 mol of NH3 has 1 mol of N atoms,
and 2.79 mol NH3 have 2.79 mol of N atoms.

2.79 mol of N atoms* 6.02 * 10 ²³ N atoms/ 1 mol N atoms = 1.68*10²⁴ N-atoms

Answer is 1.68*10²⁴ N-atoms.

5 0

3 years ago

Identify this reaction.

Kobotan [32]

Answer: synthesis

Explanation:

4 0

2 years ago

Read 2 more answers

What is the energy of a photon emitted with a wavelength of 448 nm?

DIA [1.3K]

Answer:

i think D is correct

Explanation:

so think about it

yourself

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3 years ago

Determine the heat needed to warm 25.3 g of copper from 22 degrees celsius to 39 degrees celsius.

Serggg [28]

Answer:

The heat needed to warm 25.3 g of copper from 22°C to 39°C is 165.59 Joules.

Explanation:

$Q=mc\Delta T$

Where:

Q = heat absorbed or heat lost

c = specific heat of substance

m = Mass of the substance

ΔT = change in temperature of the substance

We have mass of copper = m = 25.3 g

Specific heat of copper = c = 0.385 J/g°C

ΔT = 39°C - 22°C = 17°C

Heat absorbed by the copper :

$Q=25.3 g\times 0.385 J/g^oC\times 17^oC=165.59 J$

The heat needed to warm 25.3 g of copper from 22°C to 39°C is 165.59 Joules.

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3 years ago

What does ClF3 stand for

Nostrana [21]

Answer:

CHLORINE TRIFLUORIDE

Explanation:

3 0

3 years ago