In a chemical reaction, the mass of the reactants always equals the mass of the products.

True

False

The molecule in question 1 is ethyl alcohol. The oxygen atom in ethyl alcohol forms a polar covalent bond with the hydrogen atom.

In stars, helium can sometimes be fused into carbon and heavier elements (in their final stages of life). why didn't the same fusion processes produce carbon and heavier elements in the early universe?

What property of diamond makes it suitable for use on the cutting end of a drill bit?

There are (blank) atoms in 2Ca (CIO2) 2? how many atoms?

5. How many cubic centimeters are in one 0.354 L can of soda? A. 0.0354 B. 3.54 C. 35.4 D. 354 E. 3540

How is the ocean important to human survival? restate the question

A sample of pure lithium contains 7.99% lithium by mass. What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

What ecosystem is being described in the passage?

In the enzyme reaction above, catechol is the substrate, oxygen is a reactant, catechol oxidase is the enzyme, benzoquinone is the product, and water (H2O) is a by-product. Which of the following will decrease the rate of this reaction? a.

How do acids and bases affect the quality of freshwater sources?