Question

7. The percentage of hydrogen in a mixture was
increased by 25% to 150 mL. What was the
original amount of hydrogen in the mixture?​

Answer 1

Answer:

Step-by-step explanation:

=150 of 25%

=150 × 25/100

=37.5 ml

Total amount of hydrogen =150 +37.5ml

=187.5ml

Answer 2

Answer:

60

Step-by-step explanation: