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3 years ago

A certain element forms an ion with 10 electrons and a charge of +2. identify the element.

1 answer:

3 0

An element with a charge +2 means it loses two electrons, whenever an atom or element has positive charge it means it loses electrons. +2 charge means atom loses 2 electrons and now electrons are 10. so before there was 12 electrons and an element with 12 electrons means its atomic number is 12. An element with atomic number 12 is magnesium.

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If 3.31 moles of argon gas occupies a volume of 100 L what volume does 13.15 moles of argon occupy under the same temperature an

kumpel [21]

Answer:

397 L

Explanation:

Recall the ideal gas law:

$\displaystyle PV = nRT$

If temperature and pressure stays constant, we can rearrange all constant variables onto one side of the equation:

$\displaystyle \frac{P}{RT} = \frac{n}{V}$

The left-hand side is simply some constant. Hence, we can write that:

$\displaystyle \frac{n_1}{V_1} = \frac{n_2}{V_2}$

Substitute in known values:

$\displaystyle \frac{(3.31 \text{ mol})}{(100 \text{ L})} = \frac{(13.15\text{ mol })}{V_2}$

Solving for V₂ yields:

$\displaystyle V_2 = \frac{(100 \text{ L})(13.15)}{3.31} = 397 \text{ L}$

In conclusion, 13.15 moles of argon will occupy 397* L under the same temperature and pressure.

(Assuming 100 L has three significant figures.)

3 0

2 years ago

3 points

vfiekz [6]

Answer:

density=6.74g/ml

:320g÷47.5ml

d=6.74g/ml

thank you

I hope this is helpful

8 0

3 years ago

Which of the following might be included in a chemical

azamat

Answer:

I think it's D

Explanation:

5 0

2 years ago

State one alternative to burning fossil fuels in order to produce electricity? Please answer

Oksanka [162]

Answer:

Some well-known alternative fuels include bio-diesel, bio-alcohol (methanol, ethanol, butane), refuse-derived fuel, chemically stored electricity (batteries and fuel cells), hydrogen, non-fossil methane, non-fossil natural gas, vegetable oil, propane and other biomass sources

8 0

2 years ago

Was the reign of terror justified

arlik [135]

I would say that the reign of terror was justified because they had to strike fear in people in order to get control and they did that by executing people via guillotine

Another reason i would say that it is justified is that they had to stop the people that where supporting the revolution or the revolution would not be successful

The last reason I would say its justified is that they had to fight to get there rights and they had to fight to get they changes they needed

4 0

3 years ago