2 years ago

2.15 mol of hydrogen sulfide, H2S

1 answer:

8 0

Equation below, how many moles of hydrogen sulfide (H2S) are produced? HCl + Na2S → H2S + 2 NaCl. A) 1 mol. B) 1.25 mol. (C) 2.5 mol.

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Standard units of measure for density

Mrrafil [7]

Answer:

g/cm³ for solids,

g/ml for liquids

g/L for gases.

Explanation:

Though SI unit of density is kg/m³, for convenience we use g/cm³ for solids, g/ml for liquids and g/L for gases. Mathematically, density is defined as mass divided by volume: ρ=m/V

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2 years ago

What is the chemical name of this compound? Na2S:

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Answer:

Sodium Sulfuret

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Osmium: atomic number

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Osmium atomic number is 76

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For the Bradford assay, the instructor will make a Bradford reagent dye by mixing 50 ml of 95% v/v ethanol with 100 mg of Coomas

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Answer:

4.25% is the final concentration of phosphoric acid.

Explanation:

Initial concentration of phosphoric acid = $C_1=85\%=0.85$

Initial volume of phosphoric acid = $V_1=50 mL$

Final concentration of phosphoric acid = $C_2=?$

Final volume of phosphoric acid = $V_2=1 L=1000 mL$

( 1L = 1000 mL)

$C_1V_1=C_2V_2$

$C_2=\frac{C_1times V_1}{V_2}$

$=\frac{0.85\times 50 mL}{1000 mL}=0.0425=4.25%$

4.25% is the final concentration of phosphoric acid.

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2 years ago

“The maximum amount of energy that can be used to do work.” This statement describes which measure?

Elza [17]

Free energy is the amount of energy that can do work.

Free energy is the internal energy of a system less the amount of energy that cannot perform work.

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2 years ago

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