If it takes three "breathes" to blow up a balloon to 1.2 L, and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 L balloon?

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?