Answer:
atoms of hydrogen
Explanation:
The molecular formula for a water molecule is 
.
From the above formula, we can conclude that 1 molecule of water contains 2 atoms of hydrogen and 1 atom of oxygen.
There are 
molecules of water.
1 molecule of water = 2 atoms of hydrogen.
∴ molecules of water = 
atoms of hydrogen.
Therefore, there are atoms of hydrogen in molecules of water.
Answer:
advantages of fossil fuels are:
1. they can generate a large amount of electricity at a single location.
2. they can be found very easily.
3. they are cost-effective.
hope this helps you:)
I think it is B the distance light travels from the sun to the earth
For the first question, salt is soluble while sand is insoluble or not dissolvable in water. The salt should have vanished or melted, but the sand stayed noticeable or visible, making a dark brown solution probably with some sand particles caught on the walls of the container when the boiling water was put in to the mixture of salt and sand. The solubility of a chemical can be disturbed by temperature, and in the case of salt in water, the hot temperature of the boiling water enhanced the salt's capability to melt in it.
For the second question, the melted or dissolved salt should have easily made its way through the filter paper and into the second container, while the undissolved and muddy sand particles is caught on the filter paper. The size of the pores of the filter paper didn’t change. On the contrary, the size of the salt became smaller because it has been dissolved which is also the reason why it was able to go through the filter paper, while the size of the sand may have doubled or even tripled which made it harder to pass through.
Answer:
I THINK it's D, I could be incorrect, however.
Explanation:
C3H8O, as it is flammable, and thus I wouldn't imagine it being a product of combustion. I could be incorrect, so take my answer with a grain of salt.
