Which of the following is not a catalyst? A. Nickel B. Platinum C. Enzymes D. Phosphorus

Which has greater surface area a cube of sugar or crushed sugar

Which of the following is not a mixture? Group of answer choices 7-UP sugar air seawater

How did scientists refute the early atomic theory claim that atoms were indivisible? Select all that apply. A.

The pH of a neutral solution is below 7 above 7 7 7.5

The table lists the chemical formulas or symbols of a few common substances. Which two substances are compounds? A) aluminum and iron B) iron and sodium chloride C) carbon dioxide and aluminum D) sodium chloride and carbon dioxide

If you pump air into cycle tyre a slight warming effect is noticed at valve stem why

Butter is melted in a pan. Which of the following is true about the change? A. It is a physical change that releases energy B. It is a chemical change that absorbs energy C. It is a physiscal change that absorbs energy D.

Describe how secondary consumer is dependent on the sun for its energy

What % of the ideal soil is air?

Calculate the number of formula units in 4.55 grams of lithium carbonate, Li2CO3