What is the mass of 2.25 moles of manganese(lv) sulfide(mns2)

Explanation:

Number of moles is defined as mass divided by molar mass of the substance or atom.

Mathematically,     No. of moles =

It is known that molar mass of is 119.058 g/mol and number of moles is given as 2.25 mol.

Therefore, calculate mass of as follows.

                          No. of moles =

                                   2.25 mol =

                                 mass = 267.88 g

Thus, we can conclude that mass of 2.25 moles of manganese(lv) sulfide(MnS2) is 267.88 g.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

the answer is   c.) 1575 j.

explanation: