Search & Filtering
determine the mass of 2.345 mol
The electronic configuration for elements : Q = 2,7, R = 2, 8, 8 P = 2, 5 and S = 2,8,7. Which statements
below best states the relationship of the elements? Q and P are in the same group, Q , R and S are in the same period, Q and P are in the same period, R and S are all Inert gases
the radius of an magnesium atom is 0.160nm. calculate the radius of a magnesium nucleus.
He(g)+l2 (g) 2 HI (g) AH °> 0
Predict the effect of the following changes on the direction of the reaction and the
concentrations of the reactants and products (Motivate your answers):
(2)
1.4.1. Increasing temperature
(2)
1.4.2. Removing H2 from the mixture
Differentiate crystal structure, crystal system, and crystal form.
Which would have a lager mass, 2.0 moles of hydrogen gas, H2, or 2.0 moles of methane gas, CH4?
Explain your answer
How to prepare 800 ml of 2 mole NaCl solution?
31.5 g NH4Cl is dissolved in 500.ml H2O initially at 23c . Determine the final temperature of the resulting solution
The electrolysis of an aqueous solution of KBr has the overall reaction:
2H2O + 2Br^- (aq) → H2(g) + Br2(1) +20H^- (aq
During the electrolysis, 0.497 mol of electrons pass through the cell.
a. How many electrons does this represent?
b. How many electrons does this represent?
c. Assuming 100% yield, how many liters of H2 and Br2 are produced at 25ºC and 0.997 atm? The density of Br2 (l) is 3.10 g/mL
2Cu + S Cu2S
How many moles of S are needed to react with 10 moles of Cu?
#340153 on Dec 2023