A mixture is -

a. a chemical combination of two or more different materials.

b. a physical combination of two or more different materials.

c. a precipitate and its solution.

d. a single element.

You wish to make a 0.283 M hydrobromic acid solution from a stock solution of 12.0 M hydrobromic acid. How much concentrated acid must you add to obtain a total volume of 75.0 mL of the dilute solution

What is the name of S2Br6

Jim measures the side of a box and finds it to be 0.564 meters long. How long is it in centimeters a) 0.00564 b) 0.564 c) 5.64 d) 56.4

Which of these steps would most likely be part of a lab procedure?

An blank is a group of organisms that can mate and produce offspring that can mate

If an amino acid contained a hydrocarbon (a group of multiple carbons and hydrogens linked together) as its side group, in which of the following categories could it be appropriately designated? A) hydrophilicB) polar C) nonpolarD) basicE) acidic

Which atom can bond with each other to form chains, rings or networks? (1) carbon atoms (2) hydrogen atoms (3) oxygen atoms (4) nitrogen atoms

How many electrons in an atom can have each of the following quantum number or sublevel designations? (a) 4p (b) n = 3, l = 1, m1 = + 1 (c) n = 5, l = 3

The ksp of copper (ii) carbonate, cuco3, is 1.4 * 10-10. calculate the solubility of this compound in g/l.

A 1.0857 gram pure sample of a compound containing only carbon, hydrogen, and oxygen was burned in excess oxygen gas. 2.190 g of carbon dioxide and 0.930g of water were produced. Find the empirical formula of the compound.