One twelfth the mass of a carbon-12 atom is used to define a (an)

a. atomic mass.

b. mass number.

c. atomic number.

d. atomic mass unit.

12. The number of protons and neutrons tells us: | a. The principle quantum number b. The reactivity of the element e C. The atomic mass d. The atomic number . Both a and c

What does "like dissolves like" mean

Ammonia reacts with oxygen according to the equation: 4 nh3 (g) + 5 o2 (g) → 4 no (g) + 6 h2o (g) δhrxn = - 906 kj calculate the heat (in kj) associated with the complete reaction of 155 g of nh3.

Consider the reaction a + b c + d. at biochemical equilibrium (25°c, ph of 7), the concentration of a is 0.2 m, the concentration of b is 0.2 m, the concentration of c is 0.8 m, and the concentration of d is 0.8 m.

Consider this reaction: 2Cl2O5 (g) - ->2Cl2 (g) + 5O2 (g) At a certain temperature it obeys this rate law. rate = (17.4 M - 1. s - 1) [Cl2O5]2 Suppose a vessel contains Cl2O5 at a concentration of 1.46M.

If 100 grams citric acid react with 100 g baking soda how many grams of carbon dioxide?

What state of matter undergoes changes in volume most easily? a. solidb. liquidc. gasd. frozen

What was the result of the atomic theory?

Explain mitosis and meiosis in your own words.

What device changes mechanical energy into electrical energy? Question 4 options: transformer generator copper wire light switch