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navik [9.2K]
2 years ago
11

Please answer my questions. I really need them soon. I will post the links for other questions in the comments.

Chemistry
1 answer:
Assoli18 [71]2 years ago
6 0

Explanation:

option option B is the correct answer of given statement helium-4(He)=2

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when 10 moles of sodium reacts with excess oxygen for 60 minutes, only 3 moles of sodium remains in 1000 millimeters of H20. Wha
diamong [38]
That would be....................
8 0
3 years ago
0.28gram of NH3 on decomposition gave 0.25gram of nitrogen and hydrogen. Find the volume of hydrogen evolved at Ntp. (2gram hydr
hodyreva [135]

The volume of H₂ evolved at NTP=0.336 L

<h3>Further explanation</h3>

Reaction

Decomposition of NH₃

2NH₃ ⇒ N₂ + 3H₂

conservation mass : mass reactants=mass product

0.28 NH₃= 0.25 N₂ + 0.03 H₂

2 g H₂ = 22.4 L

so for 0.03 g :

\tt \dfrac{0.03}{2}\times 22.4=0.336

7 0
3 years ago
What is the law of fossil succession?:
nata0808 [166]

Different Fossil organisms succeed one another to go up through the different rock layers in a definite and determinable order. Therefore, any time period can be recognized by its fossil content

Explanation:

Different Fossil organisms succeed one another to go up through the different rock layers in a definite and determinable order. Therefore, any time period can be recognized by its fossil content

3 0
2 years ago
Dichlorine heptoxide (C1 2 0 7) is a
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Identify the "given" information and what the problem is asking you to "find."

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Mass of O in 1 mol Cl2O7 , 7 O: 7 x 16.00 g = 112.00 g

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8 0
2 years ago
How does producers get matter?
Margaret [11]
A producer gets it's matter from it's surroundings. E.g a plant will get minerals and water from the ground through it's roots for photosynthesis.                       
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6 0
3 years ago
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