A compound is 24.7% calcium, 1.2% hydrogen, 14.8% carbon, and the rest is oxygen. Write the empirical formula and name the compound.

Which of the mole ratios would be used to set up the below problem? How many liters of ammonia gas (NH3), can be formed from 54.

Water is separated into oxygen gas (o2) and hydrogen gas (h2) using a process called electrolysis. after electrolysis, 0.15 moles of hydrogen gas are collected at stp. what is the volume of 0.15 moles of hydrogen gas obtained at stp?

Approximately 240 ml / min of CO2 is exhaled by an average adults at rest. Assuming a temperature of 37°C and 1 atm pressure how many mol / min of CO2 is this? n = ... mol / min

Which term names enzymes in the body that speed up chemical reactions? A. catalysts B. cells C. concentrations D. chloroplasts

What was the total number of calories lost when 10 grams of water at 80c is cooled to 60c?

A 150ml sample of hydrochloric acid completely reacted with 60.0mL of a 0.100 M NaOH solution. What was the original concentration of the HCl solution

Rearrange in to a quadratic 5.333 = (0.6 + 2p) ² / (0.135 - p)

How hot would a 2.3 L balloon have to get to expand to a volume of 3.0 L? Assume the initial temperature of the balloon is 24 °C, and that the pressure inside the balloon remains constant. A. 3 K B. 42 K C. 128 K D. 390 K

Which pair of nitrogen bases will form a bond in a DNA molecule? a. cytosine and adenine b. adenine and thymine c. guanine and thymine d. thymine and cytosine

Most meteors that fall into the earths atmosphere burn up before reaching the ground. Why is this?