How is chemistry used in body sytems

Consider a compound that is 67.57% C, 9.92% H, and 22.50% O by mass. Assume that we have a 100 g sample of this compound. Also consider that the molecular formula mass of this compound is 284.4 amu.

Andre adds a spoonful of baking soda to a glass of vinegar. Bubbles begin to appear in the vinegar. The bubbles signal the formation of a

Which of these describes the rate of this chemical reaction? H2 + Cl2 → 2 HCl a. an increase in the concentration of HCl and H2 with time b. an increase in the concentration of HCl with time c. an increase in H2 and Cl2 with time d.

A 1.36 L buffer solution consists of 0.109 M butanoic acid and 0.266 M sodium butanoate. Calculate the pH of the solution following the addition of 0.067 moles of NaOH.

Karl Landsteiner placed animal blood in human blood and discovered that the blood clumped. Which did his creativity lead to?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda