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3 years ago

You want 200 mL of a 0.1 g/mL solution of sugar. how do you prepare the solution?

Chemistry

1 answer:

Inga [223]3 years ago

4 0

0.1/200= 0.0005 , u need to dissolve .0005 grams of sugar

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A copper penny has a mass of 2.6 g Assuming it is pure copper, how much of this mass is contributed by a) the neutrons in the co

Lelu [443]

The copper has a normal atomic mass of 63.546

it's atomic number is 29

it's atomic mass is 63 disregarding other mass in atom
Atomic mass - atomic number = neutron mass

63 - 29 = 34

Hope this helps

6 0

4 years ago

Read 2 more answers

30 POINTS!!!<br> NEED ASAL

nata0808 [166]

Answer:

ITS THE LAST ONE AND THE SECOND ONE

Explanation:

4 0

3 years ago

Compare the state of plasma to the other states of matter

dmitriy555 [2]

Plasma is the most least form on Earth and we hardly use it but it is the most common in the universe because it is mostly loacted in space

4 0

4 years ago

All the substances listed below are fertilizers that contribute nitrogen to the soil.

kvv77 [185]

Answer:

Ammonia is the richest source of nitrogen on a mass percentage basis because it has 82.35% of nitrogen by mass.

Explanation:

Percentage of element in compound :

$=\frac{\text{number of atoms}\times text{Atomic mass}}{\text{molar mas of compound}}\times 100$

(a) Urea, $(NH_2)_2CO$

Molar mass of urea = 60 g/mol

Atomic mass of nitrogen = 14 g/mol

Number of nitrogen atoms = 2

$N\%=\frac{2\times 14 g/mol}{60 g/mol}\times 100=46.67\%$

(b) Ammonium nitrate, $NH_4NO_3$

Molar mass of ammonium nitrate = 80 g/mol

Atomic mass of nitrogen = 14 g/mol

Number of nitrogen atoms = 2

$N\%=\frac{2\times 14 g/mol}{80 g/mol}\times 100=35.00\%$

(c) Nitric oxide, NO

Molar mass of nitric oxide = 30 g/mol

Atomic mass of nitrogen = 14 g/mol

Number of nitrogen atoms = 1

$N\%=\frac{1\times 14 g/mol}{30 g/mol}\times 100=46.67\%$

(d) Ammonia, $NH_3$

Molar mass of ammona = 17 g/mol

Atomic mass of nitrogen = 14 g/mol

Number of nitrogen atoms = 1

$N\%=\frac{1\times 14 g/mol}{17 g/mol}\times 100=82.35\%$

Ammonia is the richest source of nitrogen on a mass percentage basis because it has 82.35% of nitrogen by mass.

4 0

4 years ago

What are the steps for writing the formula for a molecular compound? Naming a molecular

Vlad [161]

Answer:

Your question was explained in my chemistry book so I just shared the picture

Hope that helps

6 0

3 years ago