Which elements have only one electron orbit or shell? A. hydrogen (H) and helium (He) B. helium (He) and lithium (Li) C. krypton (Kr) and iron (Fe) D. hydrogen (H) and calcium (Ca)

Classify N2 as a substance

If 24.6 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 301 Kelvin and 1.01 atmospheres? Show all of the work used to solve this problem. 2Li (s) + 2H2O (l) yields 2LiOH (aq) + H2 (g)

A military jet cruising at an altitude of 12.0km and speed of 1400./kmh burns fuel at the rate of 40.7/Lmin. How would you calculate the amount of fuel the jet consumes on a 1500. km mission?

Qualitative and Quantitative

How many moles of cacl2 will be produced from 3.572 g of ca (oh) 2 reacting with hcl

Which layer of the earth can only be studied by indirect means

Is Euglena heterotroph or autotroph

What is the mass of 5000. atoms of silicon

Which coefficients balance this equation? _CH4 + _O2 - > _CO2 + _H2O A. 1, 1, 1, 1 B. 1, 1, 2, 1 C. 1, 2, 1, 2 D. 2, 1, 2, 1

Student B pushed on a cart against the wall with 500 N of force. The cart didn't move. How do u explain what happened?