An electron in a sodium atom moves from the third shell to the fourth shell. This change is a result of the atom

(1) absorbing energy (3) gaining an electron

(2) releasing energy (4) losing an electron

shayla was late for school. she ran the last half mile in four minutes. what was her average speed in miles per hour

Concentrated nitric acid is 15.6M and has a density of 1.41g/mL. What is the weight percent of concentrated HNO3?

Carbon dioxide affects O2binding to Hb by: a) CO2forming iron carbonate with the heme-iron atom. b) Hb competing with carbonic anhydride for CO2. c) directly binding to heme-Fe in the oxygen binding site of hemoglobin.

Which of the following are second-order reactions? a. C2H6 → 2 CH3 b. 2 N2O5 → 4 NO2 + O2 c. 2 HI → H2 + I2 d. 2 N2O → 2 N2 + O2 e. 2 NO2 → 2 NO + O2

Consider this reaction mechanism: Step 1: Mo (CO) 6→ Mo (CO) 5 + CO Step 2: Mo (CO) 5 + P (CH3) 3→ Mo (CO) 5P (CH3) 3 Which of these is an intermediate

Identify the following: 1. The only 2 liquid elements. 2. The element in period 4, group 0. 3. The second metalloid in period 4. 4. The first element in group 4A.

You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." the soy milk is most likely a

Give reason: a. Fractionating columns with beads are used for fractional distillation b. Crystallisation is a better technique than evaporation

How can a gardener remedy soil that is overly acidic?

True or false everything has the same amount of energy?