Combination reaction also called synthesis reaction, the product will always be a compound.
For example:
A + B -> AB
C2 + O2 -> CO2
H2+Cl2 -> HCl
Answer:
A. 100 g of this solution contains 39 g of phosphoric acid
Explanation:
The formular for percentage by a mass id usually given as;
( Mass of element / Mass of compound ) * 100%
So when a solution contains 39% by mass of phosphoric acid, it means that in 100 units of the solution, there are 39 units of phosphoric acid.
The only option that satisfies this is option A. 100 g of this solution contains 39 g of phosphoric acid
Answer:
14.None would shine if bulb 1 broke
Explanation:
Bulb one connects all the other bulbs to the switch. If bulb 2 broke instead only 1 and 3 will shine because bulb 2 is not connected to bulb 3. all the bulbs should light when the switch is on.
I dont think I actually got this right pls dont take my answer for fact.
1. It is the generation of photoelectrons.
2. The existence of a threshold frequency.
