2 years ago

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

s344n2d4d5 [400]

Answer:

yeyeye

Explanation:

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3 0

3 years ago

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Paha777 [63]

The answer should be d

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3 years ago

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]

Answer:

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

If not managed properly, aquaculture can

Damm [24]

C. pollute water and damage aquatic ecosystems

7 0

2 years ago

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

Anon25 [30]

Answer:

a. 4 sig figs
b. 3 sig figs
c. 2 sig figs

8 0

3 years ago