Why does 13c - have a negative sign

What parameter must remain the same for k to be a constant in the rate law equation? Temperature Pressure Volume Activation energy

Sodium reacts with chlorine gas according to the following reaction: 2Na (s) + Cl2 (g) →2NaCl (s) What volume of Cl2 gas, measured at 689 torr and 39 ∘C, is required to form 28 g of NaCl?

An IV bag is labeled as 0.800% w/w sodium chloride in water solution with a density of 1.036g/mL. What is the concentration of sodium chloride in the solution expressed in molarity, molality, and mole fraction?

1 example of o neutral

Calculate the energy difference for a transition in the paschen series for a transition from the higher energy shell n=4. express your answer to four significant figures and include the appropriate units.

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom

Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react to form water, carbon dioxide (CO2), and Na3C6H5O7.

Four properties of water are listed. 1. It is colorless and odorless in its pure form. 2. It reacts with metals to form metal hydroxide and hydrogen gas. 3. When heated to 100 °C, water evaporates. 4. It decomposes to form hydrogen and oxygen.