A sample of hydrated calcium sulfate has a mass of 2.643 g. After dehydration, the sample has a mass of 2.090 g. What is the percent by mass of water in the hydrate?

Based on the information in Figure 2, which substances would be gases at 0 degrees Celsius?

Which observation is illustrates the law of conservation mass

Each of these geometric shapes has a different number of sides. Arrange the shapes in order from the shape with the greatest number of sides to the shape with the fewest number of sides. 1. triangle 2. square 3. rectangle 4. octagon 5. hexagon 6.

What happens to the ph of a glass of water when you blow bubbles into it with a straw?

2. Which ecoregions are most likely to experience a drought or heatwave? a. West Texas Ecoregions b. Central Texas & Panhandle Ecoregions c East Texas Ecoregions d. Coastal Ecoregions

What burns fuel to release thermal energy

Scientist call an organism that has two different alleles for a trait

The molar mass of water (H2O) is 18.02 g/mol. Yun needs 0.025 mol H2O for a laboratory experiment. She calculates that she needs 72.0 g H2O for the experiment. Yun's calculation was incorrect because she set up her unit conversion incorrectly.

I'm doing isotope homework and I need the find the number of protons, neutrons, and electrons first one is chromium-58 and chromium-63

Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid.