Answer:

Explanation:
Hello
In this case, given the reaction:

It means that since the coefficients preceding phosphorous and phosphorous trifluoride are 1 and 4, the correct mole ratio should be:

Because given the mass of phosphorous it is convenient to convert it to moles and then cancel it out with the moles on bottom of the mole ratio.
Bes regards!
Answer:
Coefficients are the numbers in front of the formulas.
Answer:
uranium, caesium, potassium, beryllium,
Explanation:
The final temperature of the water will be 31.2 °C... i don’t know the second one sorry :(