Which two notations represent atoms that are isotopes of the same element?

a. 12150sn and 11950sn

b. 12150sn and 12150sn

c. 198o and 199f

d. 3917cl and 3919k?

Solids we need to live

For the reaction 2 nh3 + ch3oh → products, how much ch3oh is needed to react with 93.5 g of nh3? 1. 1.31 mol 2. 46.8 mol 3. 2.75 mol 4. 11.3 mol 5. 3.32 mol 6. 88.1 mol 7. 5.50 mol

Earthquakes are caused by a sudden release of stress when pieces of the Earth's crust shift past each other along a fault. Which of the following could be caused by this sudden shift or its associated earthquake? A. the triggering of a landslide B.

f litmus paper is dipped in an acidic solution and then in a basic one, what will happen? The paper will turn from blue to red. The paper will turn from red to clear. The paper will turn from blue to clear. The solution will turn from red to blue.

What are moles on the body

Chris is studying oxidation and reduction reactions. Which of the following could she use as an example of an oxidation reaction?

In a short circuit as the resistance decreases what happens to the current?

Describe the characteristic of chemical structure found at the core of each steroid hormone

A molecule has one carbon-carbon double bond and four monovalent atoms or groups. how many different geometric isomers exist for this molecule?

While waiting for your car to warm up one winter morning, you notice a liquid dripping from your tailpipe. You recently learned in chemistry class that combustion reactions occur in car engines.