Adding a catalyst to a reaction has an effect similar to

a. decreasing pressure.

b. increasing temperature.

c. adding water to a reaction.

d. lowering the concentration.

Why do certain substances conduct electricity? answer choices are: because they form charged particles in solutions because they form neutral particles in solution

Hich is an example of a chemical change? mixing of poster colors formation of clouds metal corroding in salt water sugar dissolving in water separating salt from seawater

In the electron cloud model of the atom, an orbital is defined as the most probable of what?

What is the volume of 3.00 mol of neon gas at STP

4. What structural characteristics do all hydrogen atoms have in common?

The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 100 kj/mol and the change in enthalpy for the reaction is δh = - 375 kj/mol.

What process transform solar energy into chemical energy?

When the reaction was carried out the calculated theoretical yield for water was 176 grams but the measured yield was 148 grams what is the percent yield

For an atom's electrons, how many energy sublevels are present in the principal energy level n = 4?

Attempt 2 A sample of gas contains 49.16 % N 2 gas, 19.85 % Br 2 gas, 9.95 % CO 2 gas, and 21.04 % of an unknown gas. The average atomic mass of the gas mixture is 50.71 u. Calculate the atomic mass of the unknown gas.