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Vika [28.1K]
3 years ago
13

??????????????? why ????????????????

Chemistry
2 answers:
Svetllana [295]3 years ago
8 0

Answer:

because

Explanation:

life sucks

stealth61 [152]3 years ago
4 0

Answer:

because

Explanation:

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How can the knowledge of a material’s chemical makeup or use be utilized?
shutvik [7]

To identify minerals

Each material chemical makeup are a variety of chemical compounds which has each own category. They have different functional groups which helps people identify which material they look for. For instance, hydroxyl group has chemical makeup of alcohol

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There is a 50 g sample of ra-229. It has a half-life of 4 minutes.how much will be left after 12 minutes? a. 3.13 g b. 6.25 g c.
polet [3.4K]

It's B. 6.25

first divide 50/2

then divide 25/2

after that divide 12.5/2

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Hope it helps!

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3 years ago
An 8.0 L sample of neon gas at 300. K exerts a pressure of 900. kPa. If the gas is compressed to 2.0 L and the temperature is ra
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7200 kPa

Explanation:

Applying,

PV/T = P'V'/T'................ Equation 1

Where P = Initial pressure of neon gas, V = Initial volume of neon gas, T = Initial temperature of neon gas, P' = Final pressure of neon gas, V' = Final volume of neon gas, T' = Final Temperature of neon gas

Make P' the subject of the equation

P' = PVT'/V'T.............. Equation 2

Given: P = 900 kPa, V = 8.0 L, T = 300 K, V' = 2.0 L, T' = 600 K

Substitute these values into equation 2

P' = (900×8×600)/(2×300)

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3 years ago
What would happen to the temreture if there was a sudden icrease in the amount of greenhouse gasses
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Answer:

The higher concentrations of greenhouse gases—and carbon dioxide in particular—is causing extra heat to be trapped and global temperatures to rise.

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Which of the following is equal to 5,800,000,000 cm?
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It would be 5.8 times 10^9cm

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