If 32.5 grams of CaO are dissolved in 212 grams of water, what is the concentration of the solution in percent by mass?

6.52% CaO

8.67% CaO

13.3% CaO

15.3% CaO

A rigid cylinder with a movable piston contains 50.0 liters of a gas at with a pressure of 1.00 atmosphere. What is the volume of the gas in the cylinder at STP? a. 5.49 L b. 45.0 L c. 55.5 L d. 455 L

The density of a liquid can be found by using what tool?

Match each base with its common use. 1. magnesium hydroxide A. laxative 2. sodium hydroxide B. soap 3. calcium hydroxide C. plaster 4. aluminum hydroxide D. deodorants 5. ammonium hydroxide E. household cleaner

Name the type of chemical reaction that occurs when aluminum (Al) reacts with copper nitrate (Cu (NO3) 2).

Which of the following is equivalent to the complex number i^28

Convert 1.67 x10^24 atoms of carbon to moles of carbon

The knowledge of chemistry not important in one of the following? A, in agriculture B, in Geology C, in medicine D, none

Which is the balanced equation for: Al2O3 + Fe - Fe3O4 + AL

Why are lab apparatus made of ceramics

The volume of oxygen required for complete combustionof a mixture of 5 cm3 of ch4 and5 cm3 c2h4