The temperature scale that starts with absolute zero is the ___ scale

Which statement is true about elements? They are finite in number. They are infinite in number. They combine to form atoms. They combine to form electrons.

The following questions deal with safety issues in the Solutions and Spectroscopy experiment. (Select all that apply.

A compound is known to contain 46.45% carbon and 20.61% oxygen by mass. each molecule contains two atoms of oxygen. what is the molar mass of this substance?

Select the correct answer. Darryl finds a bottle of what looks like clear water, with dirt settled at the bottom. When he shakes the bottle, the water gets dirty. Which term best describes the matter in the bottle? A. substance B.

You are performing an experiment in a lab to attempt a new method of producing pure elements from compounds. The only problem is that you do not know what element will form. By your previous calculations you know that you will have 6.

What do scientists do during data collection? O A. Analyze information to form a summary B. Gather information during an experiment C. Observe and ask scientific questions O D. Design an experiment to test a hypothesis

Organic molecules always: A. contain carbon. B. contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C. are produced by living organisms. D. dissolve in water.

Whats the scientific notation of 0.00000923

A catalyst increases the rate of a chemical reaction by

What energy is changed to cell energy in stage 1 of photosynthesis. true or false