3 years ago

Pollen

Chemistry

1 answer:

Leokris [45]3 years ago

5 0

Answer:

Yes! The above answer is correct.

Adding to it, your answer is option A.

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Limescale removers contain sulfamic acid, H3NSO3, which reacts with minerals in hard water

I am Lyosha [343]

Answer:

0.375 moles of CaCO₃ are required

Explanation:

Given data:

Number of moles of sulfamic acid = 0.75 mol

Number of moles of calcium carbonate required = ?

Solution:

Chemical equation:

2H₃NSO₃ + CaCO₃ → Ca(SO₃NH₂)₂ + CO₂ + H₂O

Now we will compare the moles of H₃NSO₃ and CaCO₃ .

H₃NSO₃ : CaCO₃

2 : 1

0.75 : 1/2×0.75 = 0.375 mol

Thus, 0.375 moles of CaCO₃ are required.

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3 years ago

5<br> What is a physical property of matter?

anyanavicka [17]

Explanation:

Characteristic of matter that is not associated with its change in chemical composition.

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3 years ago

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What are some of the ethical issues of editing human DNA? Cite examples from the text to defend your answer.

dsp73

Answer:

one would be if the human had no say in it

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3 years ago

Group VII corresponds to the...

SCORPION-xisa [38]

Answer:

Halogens family

Explanation:

Be familiar with the periodic table

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4 years ago

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A gas occupies a volume of 140 mL at 35.0°C and 697 mm Hg. What is the volume of the gas at STP?

Harlamova29_29 [7]

Answer:

113.80 mL

Explanation:

Given that:

Volume $V_1 = 140 mL$

Temperature $T_1 = 35.0^0C$

$= (273 + 35) = 308 \ K$

Pressure $P_1 = 697 mmHg$

At standard temperature and pressure;

Temperature $T_2 = 273 K$

Pressure $P_2$ = 760 mmHg

Using the formula for a combined gas law:

$\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2}$

$V_2 = \dfrac{P_1V_1T_2}{T_1P_2}$

$V_2 = \dfrac{697 \ mmHg \times 140 \ mL \times 273 \ K }{308 \ K \times 760 \ mmHg}$

$\mathbf{V_2 = 113.80 \ mL}$

6 0

3 years ago