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The concentration of the standard in the first well is 90 ngmL. The aliquot volume is 100uL. The volume of diluent in well 2-8 is 100 uL each. What is the concentration of the standard in well 8?
What is the name of the hybrid orbitals used by phosphorus in PCl3? Express your answer in condensed form in order of increasing orbital energy
Given the reaction: A + B C + 43.3 kJ

a) When the temperature is decreased the (forward/reverse) ____________________________
reaction will be the faster one.

b) During this time, the [A] and [B] will ________crease and the [C] will
_________crease.

c) Because [C] is ____________creasing, the rate of the __________________________
reaction will increase.

d) Sooner or later, the forward rate and the reverse rate will again become ___________.

At this point a new ___________________________________ is established.

e) In the new equilibrium, [A] and [B] will be __________________er than they were
before the temperature is increased.

In the new equilibrium, [C] will be _____________________er than it was before.

f) In this example, we say that the equilibrium has shifted to the ____________________
Deborah has 33 g of H2 in a balloon. The pressure inside the balloon is 1.87 atm and the temperature inside the ballon is 25 Celsius. What's is the volume of the balloon? (Celclius should be converted to Kelvin)
You need to make an aqueous solution of 0.229 M manganese(II) nitrate for an experiment in lab, using a 500 mL volumetric flask. How much solid manganese(II) nitrate should you add? Also, How many milliliters of an aqueous solution of 0.144 M lead acetate is needed to obtain 17.5 grams of the salt?



2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O ΔH = -385 kJ


How much heat is released when 77.90 grams of C2H6 reacts?
A 1−g sample of glucose (a common sugar or carbohydrate) was burned in a bomb calorimeter. The temperature of 1.00 × 103 g H2O was raised from 24.6°C to 28.1°C (ΔTw = 3.5°C). Calculate the fuel value of the sugar.
Suppose 5.00 g of sodium carbonate reacts completely with an excess of hydrochloric acid. show how to calculate the mass (g) of sodium chloride that would be formed. what is the limiting reagent?
2Ca(s)+O2(g) → 2CaO(s)
ΔH∘rxn= -1269.8 kJ; ΔS∘rxn= -364.6 J/K
Part A
Calculate the free energy change for the reaction at 27 ∘C.
Looking for the chemical equation of this bond Bismuth(III) carbonate. With explanation considering carbonate has a -2 charge on it.