What is a substance?

A. A physical property of matter

B. A chemical property of matter

C. An element or compound that cannot be physically separated

D. characteristics used to tell the difference between mixtures

How many carbon atoms are in 4.56 grams of ethanol (ch3ch2oh). 1. 5.97 * 1022 atoms 2. 6.32 * 1025 atoms 3. 2.00 atoms 4. 1.26 * 1026 atoms 5. 0.198 atoms 6. 1.19 * 1023 atoms 7. 3.29 * 10-25 atoms 8. 0.0991 atoms?

Convert the following mass of a compound into moles. 23.5g of NaCl

Can anyone tell me what is bioluminescence is?

Will 1 gram of sugar or 1 gram of salt dissolve more quickly which one

Mathematical evidence that 1 calorie equal 4.18 joule

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?