What compotent of air is least nessasery for life on earth

Which of the following are chemicals? (1) clothing (2) food (3) fuels (4) all of the above

1. Write the complete balanced equation for the following reaction: C5H9O + O2 yields CO2 + H2O 2. Is this right?

According to le chatelier's principle, what would happen if the equilibrium of a weack acid or weak base were upset

A chemist is using a solution of HNO3 that has a pH of 3.75. What is [H+] for the solution?

Part b calculate the enthalpy change, δh∘, for the "expansion" of methane: ch4 (g) →c (g) + 4h (g) express your answer to one decimal place and include the appropriate units.

Kwame wants to measure the volume of water contained in a disposable foam coffe. Which should he use? Nanoliters? Milliliters? Or liters?

Which of the following changes the solid Earth the most?

Read the two questions. Question 1: Should acid precipitation be a concern for the new age environmentalist? Question 2: Does acid precipitation in forests affect the reproduction rate in birds?

How is excitation in spectroscopy brought about

What is the best reason for a student to remove a dangling bracelet when heating test tubes of acidic solutions in a hot-water bath in a chemistry lab?