Scientists can determine if oxygen existed in Earth's Archean atmosphere by

What occurs when plants make sugars for food

For some jobs, "good enough" is good enough. That's sometimes true in chemistry. More often, though, careful planning, calculations, measurement, and laboratory work are necessary to get the desired result.

What is bias in an experiment?

How many grams of potassium iodine, kl, must be added to 500.0 grams of water to produce a 6.00% solution?

Spring tides happen when? A.) The sun, the moon, and Earth are aligned. B.) The sun and moon are at right angles to the earth. C.) The earth is facing the moon. D.) The earth is facing away from the moon.

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution

Balance the following equation with the smallest whole number coefficients. Choose the answer that is the sum of the coefficients in the balanced equation. Do not forget coefficients of "one". RbOH + H3PO4 → Rb3PO4 + H2O

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume