In the formula for carbon tetrahydride, CH4, the percent composition of all elements is:

75% C, 25% H

25% C, 75% H

81% C, 19% H

20% C, 80% H

Explain the effects of human activity on groundwater and surface water in a watershed

What kind of compound has more than two atoms in it

The mass spectrum of an organic compound shows the relative abundances of m to be 85.03% and m 1 to be 21.15%. assuming the peaks are caused by 12c and 13c isotopes, determine the number of carbon atoms in the compound. natural abundances: 12c is 98.

What has 31 protons and 37 neutrons?

31p, 32p, and 33p. the atomic number of phosphorus is 15. how many protons does each of the isotopes have

What is an endothermic reaction? O A. A reaction that produces heat O B. A reaction that uses radiation waves C. A reaction that absorbs heat O D. A reaction that contains enthalpy

How does the conservation of matter relate to balancing equations?

Ethanoic acid and 1-butanol can react to produce water and a compound classified as an 1) aldehyde 2) amine 3) ester 4) halide

Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas. which equation below best describes the balanced equation for this reaction?

2H2 + O2 - - > 2H2O If 16 mol of oxygen were reacted with excess hydrogen gas, how many moles of water would be produced?