Something used to represent a complex idea or process in science is a

1 program

2 microscope

3 hypothesis

4 model

What will increase the salt concentration in seawater?

A temperature change in a reaction indicates

What causes an increase in the reaction rate between molecules

Plaster casts, CaSO4 Spell out the full name of the elements in alphabetical order separated by commas.

An organic compound contains C=61%, H=11.8% and O=27.12%. Calculate the empirical formula and molecular formula of the compound. The vapour density of the compound is 59.

For the reaction: n2 (g) + 3h2 (g) ⇔ 2nh3 (g), at a particular temperature, the concentrations of n2, h2 and nh3 are 2.1 x 10-3 m, 3.2 x 10-2 m, and 1.8 x 10-1 m, respectively. calculate a value of k for this reaction

Empirical formula for 6. 63.52% Fe, 36.48% S

Name the term used for the configuration of a stereoisomer having R groups whose positions alternate from one side to the other side along the backbone chain.

Under the Implied Consent law, which of the following is true? A. Your driving privileges will be suspended if you refuse a chemical test to measure your alcohol level. B.

If 0.366 g of hydrogen is obtained in this experiment, how many grams of sulfur must be obtained