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2 years ago

A wind turbine generating electricity involves

Chemistry

1 answer:

Debora [2.8K]2 years ago

6 0

Answer:

A. electromagnetic energy.

B. thermal energy.

C. solar energy.

D. mechanical energy.

Explanation:

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A urine sample has a mass of 147 g and a density of 1.020 g/mL. What is the volume of this sample?

son4ous [18]

So we know that the equation for density is:

$D=\frac{m}{V}$

where D is the density, m is the mass in grams, and V is the volume in mL.

So since we know two of the variables, mass and density, we can solve for the volume:

$\frac{1.020g}{mL}=\frac{147g}{V}$

$V=\frac{147g}{\frac{1.020g}{mL}}$

$V=144.12mL$

Therefore, the volume of this urine sample is 144.12mL.

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2 years ago

Covert 1.57 x 10^14 nm= ___m

LekaFEV [45]

Answer:

1.57 x 10⁷m

Explanation:

Given quantity is;

1.57 x 10¹⁴nm

Now;

1 nm = 10⁻⁹

So, let us convert this given quantity;

1 nm = 10⁻⁹

1.57 x 10¹⁴nm will give 1.57 x 10¹⁴ x 10⁻⁹ = 1.57 x 10⁷m

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2 years ago

Which of these prevents conduction from occuring?

valentinak56 [21]

C. Equal temperatures

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2 years ago

Read 2 more answers

The amount of nitrogen in an organic substance can be determined by an analytical method called the Kjeldahl method, in which al

Solnce55 [7]

Answer:

The mass percentage of nitrogen in the sample is 1.96%.

Explanation:

$Moles (n)=Molarity(M)\times Volume (L)$

21.0 mL of 0.150 M HCl

Moles of hydrogen chloride = n

Volume of hydrogen chloride solution = 21.0 mL = 0.021 L

Molarity of the hydrogen chloride = 0.150 M

$n=0.150 M\times 0.021 L=0.00315 mol$

$NH_3 (aq) + HCl(aq)\rightarrow NH_4Cl ( aq )$

According to recation, 1 mole of HCl neutralizes 1 mole ammonia.Then 0.00315 moles of HCl will neutrtalize:

$\frac{1}{1}\times 0.00315 mol=0.00315 mol$ of ammonia

1 mole of ammonia has 1 mole of nitrogen atom . Then 0.00315 moles of ammonia will have = 1 × 0.00315 mol = 0.00135 mol

Mass of 0.00315 moles of nitrogen= 0.00315 mol × 14 g/mol = 0.0441 g

Mass of the sample = 2.25 g

The mass percentage of nitrogen in the sample:

$\%=\frac{0.0441 g}{2.25 g}\times 100=1.96\%$

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2 years ago

What kinds of places may hold life ?

emmasim [6.3K]

The planets that could host liquid water and might have rocky ... Liquid water is a necessity for the kind of life we know

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2 years ago