How is beryllium (Be) similar to calcium (Ca) ?

A. Both are rare metals.

B. Both react readily with elements in Group 1.

C. Both are very reactive.

D. Both rarely combine with other elements.

A chemist requires 0.752 mol na2co3 for a reaction. how many grams does this correspond to?

Which of these is a mixture? A) air B) water C) vinegar D) carbon dioxide

What is the pH of a 7.5 x 10 exponent - 3 M H + solution

Which describes isotopes? Check all that apply.

The two covalent bonds in a water molecule are polar because a. oxygen is more electronegative than hydrogen. b. oxygen and hydrogen have similar electronegativities. c. oxygen is less electronegative than hydrogen. d. water is a small molecule. e.

The envelope of air that surrounds the earth is called

What is the chemical formula for potassium permanganate?

Is it always possible to identify something as an element compound pure substance or mixture

Why would someone weigh less on Pluto?

HNO3 + H2O > H3O (aq) + NO3 - (aq)