Compare and contrast substances and mixtures with two examples

The half-life of bismuth is 5 days. How much of a 100 gram sample will remain after 20 days? a. 50 grams b. 12.5 grams c. 6.25 grams d. 0 grams

The molar mass of methane is 16.04 g/mol. Calculate the number of moles of methan burned in the experiment.

According to one acid-base theory, a water molecule acts as an acid when the water molecule (1) accepts an H + (3) donates an H+ (2) accepts an OH - (4) donates an OH-

After five days both sets of cheese i touched are moldy both sets of cheese that I left alone have no mold

If equal volumes of 0.8M sodium lactate and 0.4M lactic acid are mixed, and the pKa of lactic acid is 3.86, the final of the solution pH should be

What jobs involve chesmistry

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?

A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?

Is the water density higher than the aluminum density