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GuDViN [60]
2 years ago
5

A student wants to know if the effect of gravity is the same on all objects. She follows these steps:

Chemistry
1 answer:
BartSMP [9]2 years ago
8 0
Choose new balls (which is A I believe)
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1 A 3.80 g sample of bronze was dissolved in sulphuric acid. The copper in alloy reacted with
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The following information is to be used for the next 2 questions. In order to analyze for Mg and Ca, a 24-hour urine sample was
Ainat [17]

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Explanation:

From the given information:

The concentration of metal ions are:

[Ca^{2+}]= \dfrac{0.003474 \ M \times 20.49 \ mL}{10.0 \ mL}

[Ca^{2+}]=0.007118 \ M

[Mg^2+] = \dfrac{0.003474 \ M\times (26.23  - 20.49 )mL}{10.0 \ mL}

=0.001994 \ M

Mass of Ca²⁺ in 2.00 L urine sample is:

= 2.00 L \times 0.001994 \dfrac{mol}{L} \times \dfrac{40.08 \ g}{1 \ mol}

= 0.1598 g

Mass of Ca²⁺ = 159.0 mg

Mass of Mg²⁺ in 2.00 L urine sample is:

= 2.00 L \times 0.007118 \dfrac{mol}{L} \times \dfrac{24.31 \ g}{1 \ mol}

= 0.3461 g

Mass of Mg²⁺ = 346.1 mg

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3 years ago
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C. pollute water and damage aquatic ecosystems

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4. Determine the number of significant figures in each of the following (1 pt each, 3 pts total)
Anon25 [30]
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