3 years ago

PLZ help! 10 Points is all i could afford

Chemistry

1 answer:

LekaFEV [45]3 years ago

4 0

Answer:

Explanation:

protons and neutrons are in the nucleus which i where most of the mass of an atom comes from

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The molecular mass of the compound is 132 amu. What is the molecular formula?

densk [106]

C6H12O3 is a molecular formula that contains 54.5% C, 9.1% H, and 36.4% O and <span>has a molar mass 132 amu. </span>

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3 years ago

Seawater is typically 3.5% salt and has a density of 1.03 g/mL. How many grams of salt would be needed to prepare enough seawate

Bas_tet [7]

Answer:

Amount of salt needed is around 2.3*10³ g

Explanation:

The salt content in sea water = 3.5 %

This implies that there is 3.5 g salt in 100 g sea water

Density of seawater = 1.03 g/ml

Volume of seawater = volume of tank = 62.5 L = 62500 ml

Therefore, the amount of seawater required is:

$=Density*Volume = 1.03g/ml*62500ml = 6.44*10^{4} g$

The amount of salt needed for the calculated amount of seawater is:

$=\frac{6.44*10^{4}g\ water*3.5g\ salt }{100g\ water} =2254 g =2.3*10^{3} g$

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3 years ago

Technetium-99 is an ideal radioisotope for scanning organs because it has a half-life of 6.0 h and is a pure gamma emitter. supp

Nadusha1986 [10]

Answer: 20 mg Te-99 remains after 12 hours.

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N(t) = (80 mg)*(0.5)^(12/6)

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2 years ago

How much calcium hypochlorite (65% strength) is needed to make 200 L of 2% hypochlorite solution? (Assume that a 1% solution is

g100num [7]

To solve this we use the equation,

M1V1 = M2V2

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3 years ago

Please help with 2 chem questions thank you!

xeze [42]

The correct answers are A and C.

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3 years ago

Read 2 more answers