The OH-ion concentration of a blood sample is 2.5 x 10-7M. What is the pH of the blood?
a. 6.60
b.0.99
c.740
d.1

How have the greenhouse gasses increased from the year 2000 to 2018

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural. question 2 reflects a moral or social value. question 3 refers to something that can be measured. question 4 reflects a question that can’t be observed.

Sodium chloride can be made as follows: 2na + cl2 ? 2nacl i calculate the maximum amount of nacl possible if 2.3 g of sodium was reacted with excess chlorine. show all your workings.