Which of these is a pure substance?

a. ocean water

b. 10 carat gold

c. solid gold

d. cake mix

Atoms from which two elements would form ionic bonds

Which of the following is most likely the distance between two places on Earth? 6,456 miles 30 million kilometers 10.8 billion light years 1.14 astronomical units

A current of 9 A flows through an electric device with a resistance of 43 Ω. What must be the applied voltage in this particular circuit?

Matter is made up of small

Which of the following factors contributes to the decrease in ionization energy within a group in the periodic table as the atomic number increases?

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?