How many years ago were seven score and four years ago? (a score means 20)

Consider the chemical equations shown here. CH4 (g) + CO2 (g) + 2H20 (g) 2H2o (g) 2h20 (i) What is the equation for the overall reaction obtained by adding these equations?

What is the net loss of hydrogen for each full cycle of the proton-proton chain

End-users of natural gas include (check all that apply) :

What must occur for a change to be a chemical reaction

If the ka of a monoprotic weak acid is 5.8 * 10-6, what is the ph of a 0.45 m solution of this acid?

How to find the better buy of two of the same item, but they have different units of measurements and different costs.?

The agricultural practice of spraying insecticides leaves behind which pollutant in the soil? A. Chemical poison B. Excess nitrogen C. Excess salt D. Acidic compounds

What is the name of the compound composed of iron and carbonate? [hint: iron has a + 3 charge in this compound]?

In a chemical equation the products appear on which side of the equation? A. Left B. Top C. Right D. Bottom

What does the shape of a protein molecule resemble?