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3 years ago

10

Stoichiometry is only used to measure the amount of reactant that is needed. TRUE or FALSE

1 answer:

slamgirl [31]3 years ago

7 0

False.

Stoichiometry is also used to make other calculations: limitant or excess reagents and quantity of products produced are two important uses of stoichiometry. Furthermore it is used to make energy calculations related with the chemical reactions.

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Would you expect Nio to dissolve in an aqueous solution of NaNO3?

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Answer:

NiO Does Not Dissolve In An Aqueous Solution Of NaNO3.

Explanation:

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How might a renewable energy source become non-renewable???

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if it is used continuously

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Besides two molecules of pyruvate, what are the net products of glycolysis?

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Wastewater from a cement factory contains 0.280 g of Ca2+ ion and 0.0220 g of Mg2+ ion per 100.0 L of solution. The solution den

faltersainse [42]

<u>Answer:</u> The concentration of $Ca^{2+}\text{ and }Mg^{2+}$ ions are 2.797 ppm and 0.212 ppm respectively.

<u>Explanation:</u>

To calculate the mass of solution, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Volume of gold = 100 L = 100000 mL (Conversion factor: 1 L = 1000 mL)

Density of gold = 1.001 g/mL

Putting values in above equation, we get:

$1.001g/mL=\frac{\text{Mass of solution}}{100000mL}\\\\\text{Mass of solution}=1.001\times 10^5g$

To calculate the concentration in ppm (by mass), we use the equation:

$ppm=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^6$

<u>Calculating the concentration of calcium ions:</u>

Mass of $Ca^{2+$ ions = 0.280 g

Putting values in above equation, we get:

$ppm(Ca^{2+})=\frac{0.280g}{1.001\times 10^5}\times 10^6=2.797ppm$

<u>Calculating the concentration of magnesium ions:</u>

Mass of $Mg^{2+$ ions = 0.0220 g

Putting values in above equation, we get:

$ppm(Mg^{2+})=\frac{0.0220g}{1.001\times 10^5}\times 10^6=0.212ppm$

Hence, the concentration of $Ca^{2+}\text{ and }Mg^{2+}$ ions are 2.797 ppm and 0.212 ppm respectively.

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3 years ago

A rising tide is also known as what kind of tide

Softa [21]

A rising tide is also known as an occurrence between low tide to high tide.

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3 years ago