A pH scale is used to measure

a. how acidic a liquid is

b. how basic a liquid is

c. both of the above

How do the cells get the raw materials that they need to respire

Suppose that you are given two unlabeled beakers. One beaker contains water, and the other beaker contains a solution of ethanol and water. How could you safely determine which beaker contains just water?

Predict which of butane (C4H10) or propanone (CH3COCH3) has the greater viscosity. Assume that they are both at the same temperature and in their liquid form. a. They have equal viscosities. b. It's impossible to know. c. propanoned. butane

Which statements about chemical properties and chemical changes are correct? Check all that apply. Combustibility is a chemical property. Color is a chemical property. Atoms are rearranged during a chemical change.

In a controlled experiment, the factor tested is called the A. constant. B. independent variable. C. dependent variable. D. control.

How can a mixture of nails and sawdust be most efficiently separated into its component parts? A:By cooling it B:By filtering it C: By using a magnet D:By using a catalyst

A 10.0 L balloon contains helium gas at a pressure of 655 mmHg. What is the new pressure, in mm Hg, of the helium gas if the volume is 20.0 L and if there is no change in temperature or quantity? 6550 mmHg 1000 mm Hg 1310 mmHg 300 mm Hg

Restate Newtons first law in terms of acceleration

Electrolysis of 10.0 g of a binary metal chloride deposits 6.207 g of the pure metal. what is the metal?

Which pair of elements are the most different