Answer:
My answer would be
B.
Explanation:
Although helium is twice as heavy as (diatomic) hydrogen, they are both significantly lighter than air, making this difference negligible. The lifting power in air of hydrogen and helium can be calculated using the theory of buoyancy as follows: Thus helium is almost twice as dense as hydrogen.
<span>C) Sound is a mechanical wave and needs a medium to travel through while light is an electromagnetic wave.
There is no air for the sound waves to travel, therefore, no sound waves being transmitted. </span>
Answer:
<h3>The answer is 0.73 g/mL</h3>
Explanation:
The density of a substance can be found by using the formula
From the question
mass = 620 g
volume = 850 mL
We have
We have the final answer as
<h3>0.73 g/mL</h3>
Hope this helps you
In 100.0g of sucrose there are 42.1 g of carbon.
Answer:
1. Rearranged
2. Different
3. The same after the reaction.
Explanation: