All categories

3 years ago

The atmosphere is composed of

Chemistry

1 answer:

allsm [11]3 years ago

8 0

I think it's the c (<span>.all the gases that surround the Earth)</span>

You might be interested in

Which type of wave interaction is shown in the photo? with ISSN AN O A. Diffraction O B. Reflection O C. Refraction O D. Absorpt

il63 [147K]

Answer:

I believe the answer is B.) Reflection

I hope I helped! ^-^

6 0

2 years ago

Write the name for the compound Al₂S₃

Svetlanka [38]

Answer:

Uh Joe stinky?

Explanation:

7 0

3 years ago

Read 2 more answers

How many iron atoms are in 0.32 mol of Fe2031? 3.9x 1023 jron atoms O 3.9 iron atoms O 6.02 x 1023 iron atoms 1.9 x 1023 iron at

Gennadij [26K]

Answer: $3.9\times 10^{23}$ iron atoms

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

$1 molecule of [tex]Fe_2O_3$ contains= 2 atoms of iron

$1 mole of [tex]Fe_2O_3$ contains= $2\times 6.023\times 10^{23}=12.05\times 10^{23}$ atoms of iron

thus 0.32 moles of $Fe_2O_3$ contains= $\frac{12.05\times 10^{23}}{1}\times 0.32=3.9\times 10^{23}$ atoms of iron

Thus the sample would have $3.9\times 10^{23}$ iron atoms.

8 0

3 years ago

Help please

aleksklad [387]

C. The number of neutrons
Since Carbon 12 has 6 neutrons
And carbon 13 has 7 neutrons.
You know that elements have equal protons (atomic number) and electrons

5 0

2 years ago

Calculate the number of carbon atoms contained in 5.6 g of C2H4

miss Akunina [59]

Molecular mass of C₂H₄ is,

M = 2×12 + 4×1 g/mol

M = 28 g/mol

Moles of C₂H₄ in 5.6 g of C₂H₄ :

n = 5.6/28 mol

n = 0.2 mol

Now, 1 mol of C₂H₄ contains 2 moles of carbon.

So, number of moles of carbon are :

n = 0.4 mol

We know, 1 mol of any atom contains 6.022 × 10²³ atoms.

So, number of carbon atoms are :

$N = 0.4 \times 6.022\times 10^{23} \\\\N = 2.409 \times 10^{23}$

Hence, this is the required solution.

4 0

3 years ago