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3 years ago

Naturally occurring strontium consists of four isotopes, Sr-84, Sr-86, Sr-87 and Sr-88.

Chemistry

1 answer:

Alina [70]3 years ago

6 0

Answer:

7+9.86+.56=17.42, 100-17.42= 82.58%

Explanation:

Add them all together then minus by 100%

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Natural gas is nonrenewable or renewable resources ?

SOVA2 [1]

The answer is Non-renewable

7 0

3 years ago

Read 2 more answers

To determine the concentration of chloride ion (Cl-) in a 100 mL sample of ground water, a chemist adds a large enough volume of

Orlov [11]

Answer:

$[Cl^-]=232.3\frac{mgCl^-}{L}$

Explanation:

Hello,

In this case, we can represent the chemical reaction as:

$Cl^-(aq)+AgNO_3(aq)\rightarrow AgCl(s)+NO_3^-(aq)$

In such a way, since the mass of the obtained silver chloride is 93.9 mg, we can compute the chloride ions in the ground water by using the following stoichiometric procedure whereas the molar mass of chloride ions and silver chloride are 35.45 g/mol and 143.32 g/mol respectively:

$m_{Cl^-}=93.3mgAgCl*\frac{1mmolAgCl}{143.32mgAgCl}*\frac{1mmolCl^-}{1mmolAgCl} *\frac{35.45mgCl^-}{1mmolCl^-} =23.23mgCl^-$

Finally, for the given volume of water in liters (0.100L), we compute the required concentration:

$[Cl^-]=\frac{23.2mgCl^-}{0.100L}\\$

$[Cl^-]=232.3\frac{mgCl^-}{L}$

Best regards.

5 0

4 years ago

Which statement best explains why earth and the other planets of our solar system became layered as they were being formed

bija089 [108]

What are your answer choices?

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3 years ago

Aqueous sulfuric acid H2SO4 reacts with solid sodium hydroxide NaOH to produce aqueous sodium sulfate Na2SO4 and liquid water H2

Pie

Answer:

109.34 g

Explanation:

2NaOH(aq) + H2SO4(aq) ------> Na2SO4(aq) + 2H2O(l)

Number of moles of NaOH = 105g/40g/mol = 2.6 moles

From the reaction equation;

2 moles of NaOH yields 1 mole of sodium sulphate

2.6 moles of NaOH yields = 2.6 × 1/2 = 1.3 moles of sodium sulphate

Number of moles of H2SO4= 75.5g/98 g/mol = 0.77 moles

From the reaction equation;

1 mole of H2SO4 yields 1 mole of sodium sulphate

Hence, 0.77 moles of H2SO4 yields 0.77 moles of sodium sulphate

So H2SO4 is the limiting reactant.

Theoretical yield = number of moles × molar mass

= 0.77 mol ×142 g/mol

= 109.34 g

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3 years ago

The Balanced equation for the combustion of ethene is given below. If 97.7 g of oxygen is used, how much heat energy will be pro

umka2103 [35]

Answer:

the answer is d. 74.02

Explanation:

When ogyen all together with the different things to get this.

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3 years ago