Which of the following has 1.2 x 10^24 hydrogen atoms?
a) 1 mole of methane (ch4)
b) 2 moles of ammonia (nh 3)
c) 2 moles of hydrogen gas (h 2)
d) 1 mole of water (h 20)

Answer : The correct option is, (D) 1 mole of water

Explanation :

As we know that, 1 mole of substance contains number of atoms.

(A) 1 mole of methane

As, 1 mole of methane contains 3 moles of hydrogen atoms.

So, 1 mole of methane contains of hydrogen atoms.

The number of hydrogen atoms present in 1 mole of methane are

(B) 2 moles of ammonia

As, 1 mole of ammonia contains 3 moles of hydrogen atoms.

So, 2 mole of ammonia contains of hydrogen atoms.

The number of hydrogen atoms present in 1 mole of ammonia are

(C) 2 moles of hydrogen gas

As, 1 mole of hydrogen gas contains 2 moles of hydrogen atoms.

So, 2 mole of hydrogen gas contains of hydrogen atoms.

The number of hydrogen atoms present in 1 mole of hydrogen gas are

(D) 1 mole of water

As, 1 mole of water contains 2 moles of hydrogen atoms.

So, 1 mole of water contains of hydrogen atoms.

The number of hydrogen atoms present in 1 mole of water are

Hence, the correct option is, (D) 1 mole of water

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)