A sample of carbon-12 has a mass of 6.00 g. How many atoms of carbon-12 are in the sample?

3.01 * 1023

6.02 * 1023

1.20 * 1024

3.60 * 1024

What is mass? A. the amount of matter in a substance B. the amount of weight in a substance C. the number of atoms in a substance D. the amount of volume of a substance

Explain Rutherford Bohr model?

What volume (ml) of a 0.2450 m koh (aq) solution is required to completely neutralize 55.25 ml of a 0.5440 m h3po4 (aq) solution?

If 152 grams of ethane (c2h6) are reacted with 231 grams of oxygen gas, what is the mass of the excess reactant leftover after the reaction has reached completion? 2c2h6 (g) + 7o2 (g) → 4co2 (g) + 6h2o (g)

For an alloy that consists of 93.1 g copper, 111.7 g zinc, and 4.0 g lead, what are the concentrations of (a) Cu, (b) Zn, and (c) Pb in weight percent? The atomic weights of Cu, Zn, and Pb are 63.54, 65.39, and 207.2 g/mol, respectively.

A solution of cough syrup contains 5.00% active ingredient by volume. if the total volume of the bottle is 41.0 ml, how many milliliters of active ingredient are in the bottle?

All of the following are true for a catalyst except that it A. provides an alternative pathway for a reaction. B. increases the rate of a chemical reaction. C. provides a lower required activation energy. D. is consumed during a chemical reaction.

Describe the relationship between gravitational force and distance as shown in the diagram.

Crystals Choose one: A. display asymmetry. B. have an orderly internal arrangement of atoms arranged in a lattice pattern. C. grow inward from a seed. D. are youngest in the center and oldest at the outer edge.

50. mL of water is initially 70. k and cooled to 25. k. What is the thermal energy?