What is an example of a physical change

What is the theoretical yield of ammonia, in kilograms, that we can synthesize from 5.26 kg of h2 and 32.7 kg of n2?

Which of these is used to find the estimated age range of a fossil?

Dimensional analysis: if you count at the rate of 2 numbers every secound, how many days whould it take you to count to 1 million?

Match the correct piece of glassware to its function in an acid-base titration: Erlenmeyer flask volumetric pipet buret

In the following reaction, what is the effect of adding more NO2 to the starting reaction mixture? 2NO2 (g) ⇌ N2O4 (g) It would increase the final quantity of products It would make the reaction more endothermic It would slow the reaction down.

Atoms of metallic elements tend to A) gain electrons and form negative ions B) gain electrons and form positive ions C) lose electrons and form negative ions D) lose electrons and form positive ions

Only a small amount of the energy used in an incandescent light bulb (regular bulbs commonly used in households) is actually converted into light.

Suppose we want to charge a flask with 1.9 g of sugar. We put the empty flask on a balance and it is determined to weigh 450 g. Enter the weight we would expect to see on the balance when we're done adding the sugar.

The billiard ball model was working model of the atom until Thomson discovered the

9474 millimeters to centimeters using scientific notation showing work