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Andreyy89
2 years ago
11

Calculate the number of moles in 7g of nitrogen gas​

Chemistry
1 answer:
Andru [333]2 years ago
5 0

Answer:

<h3>0.2498molN_{2}</h3>

Explanation:

7gN2 x \frac{1 mol}{2(14.01) g}

=0.2498mol N2

Nitrogen gas has the formula N_{2} so therefore that means you would have to multiply the mass in the molar by 2. To solve for the number of moles you need to cancel out the grams, you do this by using the molar mass of nitrgoen gas. You get the value on in the denominator from the periodic table (atomic mass of element). The grams will cancel out, leaving you with the number of moles when you divide 7/2(14.01).

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The chemical name of copper ii tetra sulphate pentahydrate​
Anastasy [175]

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3 0
2 years ago
MgNH4PO4•6H2O loses H2O in a stepwise fashion as it is heated. Between 40 degrees celsius and 60 degrees celsius, the monohydrat
tino4ka555 [31]

Answer:

\%\ Composition\ of\ phosphorus=20.00\ \%

Explanation:

The molecular formula of the monohydrate formed = MgNH_4PO_4.H_2O

The molecular mass of the monohydrate formed = Mass_{Mg}+Mass_{N}+6\times Mass_{H}+5\times Mass_O

So, Mass = 24 + 14 + 6 × 1 + 5 × 16 = 155 g

Mass of phosphorus = 31 g

Thus,

\%\ Composition\ of\ phosphorus =\frac{Mass_{phosphorus}}{Total\ mass}\times 100

\%\ Composition\ of\ phosphorus=\frac{31}{155}\times 100

\%\ Composition\ of\ phosphorus=20.00\ \%

4 0
3 years ago
Which compound is bonded covalently? A.KF B.MgS C.BeO D.SO2
Masja [62]

Answer:

SO2 is bonded covalently

Explanation:

Atoms that share electrons in a chemical bond have covalent bonds.

6 0
2 years ago
When the [H+] in a solution is 1.7 × 10−9 M, what is the pOH ? 8.80 5.23 14 8.60
kumpel [21]
PH = -log[H+]
pH = -log[1,7×10^-9]
pH = 8,77

pH + pOH = 14
pOH = 14 - 8,77
pOH = 5,23
5 0
3 years ago
Read 2 more answers
Write ionic formulas for the following compounds:
lakkis [162]

You may find the chemical formulas for the ionic compounds below.

Explanation:

a. Calcium Bromide - CaBr₂

b. Potassium Phosphide  - K₃P

c. Iron (III) Oxide  - Fe₂O₃

d. Iron (II) Oxide  - FeO

e. Magnesium Hydroxide  - Mg(OH)₂

f. Nickel (III) Sulfate​ - Ni₂(SO₄)₃

Learn more about:

 chemical formulas of ionic compounds

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#learnwithBrainly

6 0
3 years ago
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