Answer:
3 atoms of O
8.57g
Explanation:
The problem here is to find the mass of oxygen in the compound and the number of atoms of oxygen.
The formula of the compound is:
NaHCO₃;
Here we have:
1 atom of Na
1 atom of H
1 atom of C
3 atoms of O
So there are 3 atoms of O
To find the mass of oxygen , we use the molar mass of oxygen;
Molar mass of oxygen = 16g/mol
Mass of oxygen = 
x 15 = 8.57g
Answer:
an open area, one typically with crops. a particular branch of a study or interest.
Explanation:
As soon as the metal gets into the water a temperature transfer will start between both of them resulting in
1. Metal will cool down.
2. Some water will get evaporated.
3. Temperature of water will rise.
4. As the metal gets into the water, a sound like chissssss will be heard.
Hope it helps.
Don't be shy and say thx.<span />
<span>The statement is false. It was Democritus, a Greek
philosopher, who first theorized that matter was ultimately composed of atoms.
His ideas were not widely accepted in his time (460-370 B.C), but during the 19th
century, John Dalton proposed this theory and gained broad acceptance.</span>
The ratio of effusion of rates of oxygen (O2) to Hydrogen (H2) is calculated as follows
rate of O2/ rate of H2 = square root of molar mass of H2/molar mass of O2
= square root = 2 /32 = 0.25
