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snow_lady [41]
3 years ago
11

What element is this?

Chemistry
1 answer:
LiRa [457]3 years ago
8 0

i think helium hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

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How many moles are in 89 liters of water vapor?
Brut [27]

Answer:

4 moles

Explanation:

A mole is equal to 6.02214076 × 1023 of any chemical unit (atoms, molecules, ions)

To find number of moles in 89 litres of water vapor use the following formula:

1 mole = 22.4 L

That is 1 L = \frac{1}{24} mole

Volume of water vapor = 89 litres

Therefore,

Number of moles in 89 litres = \frac{89}{24}=3.7 ≈ 4 moles

5 0
2 years ago
What is the half-life of sodium-24? EXPLAIN how you determined your answer.
liraira [26]
Half-life is basically how long it takes for a radioactive molecule to get to 1/2 of its original mass.

so if sodium 24 mass was 5g and it's half life was 24years then:

after every 24years 1/2 of 5g would have decayed. so in 48years there will only be 2.5g left.
8 0
3 years ago
Magnesium element has three isotopes: 24Mg, 25Mg, and 26Mg. The natural abundance of the isotopes on Earth is 78.99% 24Mg with a
Dafna11 [192]

Answer:

24.305 to the nearest thousandth.

Explanation:

That is 0.7899*23.985 + 0.10* 24.985+0.1101*25.9825

= 24.305.

3 0
3 years ago
Scientific endeavor must be driven by the needs of society and not by simple curiosity. true false
vazorg [7]
False people can do whatever they want without people telling them what to do.
5 0
3 years ago
Calculate the amount of CaO that would be produced when 35.5g of CaCO3 decompose on heating (Ca= 40, O = 16, C = 12, H = 1
DanielleElmas [232]

amount of CaO that would be produced when 35.5g of CaCO3 decompose on heating (Ca= 40, O = 16, C = 12, H = 1

just put the values to have answer

4 0
3 years ago
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