The luminosity of the Sun is 4 x 1026 W, which means that the sun emits 4 x 1026 J of energy every second. How much mass does it change into energy every second? Express your answer in kilograms. In fusion reactions, only a small fraction of the hydrogen mass is converted into energy. 99.3% of the hydrogen is converted into helium, and just 0.7% of the hydrogen is converted into energy. Based on this information, how much hydrogen undergoes fusion in the Sun every second? Express your answer in kilograms.

Solution :

The sun emits = J of energy per second

                        =

We know,

,   where C =

Dividing both sides by 1 second

Then,

Now according to the information, 99.3% hydrogen.

If 0.7 % of hydrogen produce = J of energy per second

Then 1% of hydrogen will produce =   J energy per second

So, 100% of hydrogen will produce =  J energy per second

                                                          =  J energy per second

Mass of hydrogen undergo fusion in sun per second

Similarly,

  kg

kg

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.