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Which of the following molecules is best described as having a nearly tetrahedral distribution of electron density?
A) BeCl2
B) OF2
C) SnCl2
D) none of these
In which of the following molecules does the carbon atom have a linear distribution of electron density?
A) C2H2
B) C2H4
C) C2H6
Which of the following is true for the molecule O=C=S?
A) it is nonpolar because it contains only double bonds
B) it is polar because the polarities of the O=C and C=S do not cancel
C) it is polar because it has a bent shape
D) it is nonpolar because it is linear
An aqueous solution of KNO3 has a molal concentration of 1.099 mol kg-1. Its density is 1.0630 g mL-1. Calculate the molar concentration of KNO3.
Pressure and temperature remain constant. What is the new voume if 0.500 mole O2 gas is added?
What mass of NaOH is needed to precipitate the Cd^{2+} ions from 38.0 mL of 0.480 M Cd(NO_3)_2 solution
Hydrocyanic acid (HCN) is a weak acid with Ka = 4.9 x 10-10. The pH of a solution that contains equal numbers of moles of HCN and KCN is closest to
A piece of amber was cut into a rectangular solid measuring 5.18cm by 10.8cm by 2.85m . What is the volume in cubic centimeters
A quantity of N2 occupies 62.2 L at a partic- ular temperature and pressure. Its density is 0.900 g/L. How many moles of N2 are in the container?
a) How many moles of water form when 5.00L of propane gas completely reacts? b) How many grams of CO2 are produced from 18.5 g of oxygen gas and excess propane? c) How many grams of H2O can be produced from the reaction of 8.50*10^22 molecules of ..
calculate the mass of KHP(KHC8H4O4) needed to react completely with 25 mL of a 0.10 M NaOH solution?
Predict whether a reaction will occur in each of the following. if so write the balanced chemical equation as well as the net ionic equation. Phases are all required for all species.
compounds are dissolved in 1.00 L of w ater: 0.220 mol HA (K a = 1.36 x 10 - 3 ), 0. 18 mol NaA, 0.0 8 mol H 2 SO 4 , and 0.08 mol KOH . What is the pH of the resulting solution?
If 18.4 mL of 0.800 M HCl solution are needed to neutralize 5.00 rm mL of a household ammonia solution, what is the molar concentration of the ammonia?
How many grams of the solid can be formed from 268 g of calcium nitrate and 115 g of phosphoric acid?
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