Which of these does not cause a change in the reaction rate?

A. density

B. temperature

C. concentration

D. particle size

What it the main difference between an ionic and a covalent bond?

A cylinder of iron has a mass of 23.45 g. If it is placed on an electronic balance that reports all masses 18.00% too low due to miscalibration, what mass will the balance report for the cylinder of iron?

Which statement about a chemical reaction is true?

What is the number 0.0062985632 written in scientific notation to three significant figures?

Ms. Bristol measured the mass of a closed beaker containing several ice cubes. The mass was 100 g. An hour later, after the ice cubes had melted, Ms. Bristol measured the mass of the beaker again. What was the mass of the beaker the second time? * A.

A compound is made of copper, nitrogen, and oxygen atoms. A sample of the compound has 6.4 grams of copper, 2.8 grams of nitrogen and 9.6 grams of oxygen. The compound has a molar mass of 188 g/mol. Write the name and formula of the compound.

Identify the products when zinc metal is exposed to H2S gas

Compare and contrast absolute dating and relative dating.

What is competition a cause of? a. natural competition b. natural symbioses c. natural capacity d. natural selection

A sample of three mixed gases is at 632.0 mmhg. if the partial pressure of co2 is 124.3 mmhg and the partial pressure of n2 is 461.9 mmhg, what is the partial pressure of o2?