Answer: The correct option is C.
Explanation: Beta minus (
) decay is the decay in which a neutron is converted into proton and releases beta particle or generally known as electron.
There is an increase in the Atomic number because one protons is being formed.
In the case of beta-minus decay of phosphorous, the P-nucleus gets changed to Sulfur nucleus. The balanced Chemical equation for this process is:

Hence, the correct option is C.
You will use PV=nRT
First, water vapor pressure at 25°C is 23.8 mmHg. Subtract this from the total pressure to get 733.2 mmHg. Convert to atm to get 0.965 atm.
15.9g of Ag = .147 mole Ag
25°C +273.15 = 298.15K
Plug in the values.
(.965atm)V = (.147mol)(.08206 L*atm/mol*K)(298.15K) = 3.7 L
Answer:
the answer is d which is soap solution because it's a soap solution that can measure the degree of hardness of a water if the water forms with this soap solution then the water is hard but if the water forms foam with soap then it is soft
I believe the best answer to that question wud be D. I cud b wrong