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1) If 28% of the objects in a box weighed 45 gm each and other72% weighed 55 gm each, what is the average weight of theobjects.
2) If you mix 8.0 tons of sand, 12 tons of rock, and 4.0 tonsof cement to make concrete, what will the percent by weight of sandbe?
3) If milk is $2.12 per half gallon, eggs are $0.85 perdoz, flour is $1.95 for 5 lb, sugar is $2.05 for 5 lb andshortening is $3.35 for 3 lb, what will be the cost of theingredients for the following cake recipe: 1pt (2cup) milk, 4 eggs,2lb (4 cups) flour, 1 lb (2 cup) sugar, 1 lb shortening.
4) If you have a mixture of 10 lb. sunflower seeds whichcost 32 cents per pound and 16 lb of cracked corn whic cost 18cents per pound, how much will this mixture cost perpound.
Calculate the empirical formula and the molar formula.
Determine the concentration of the sodium hydroxide solution? Considering this balanced equation given as :
How do you calculate the concentration % of a unknown solution with the equation y=30.662x-0.2147 with a known absorbtion of 0.330
The active ingredient in aspirin is acetylsalicylic acid (HC9H7O4) a monoprotic acid with Ka = 3.3 10-4 at 25°C. What is the pH of a solution obtained by dissolving two extra-strength aspirin tablet
Give the bond angle and describe the shape around the central atom designated in this molecule.
The pH at the ½ neutralized point in the titration of a weak acid is 6.824. What is the pKa of this acid
calculated using the energy level equation. A Li2+ ion emitted a photon with a wavelength of 11.4 nm to reach an energy level with n=1. What was the value of n for its initial energy level?
write the molecular and net ionic equation for when AgNO3 and Na2CO3 are mixed. Then write the net ionic equation when each of the following stresses are applied to the same mixture.
consider the titration of 25.00ml of 0.650 M propanoic acid, HC3H5O2 ( Ka = 1.3 X 10^-5), with 0.750 M sodium hydroxide, NaOH, and answer the following questions?
For a certain process at 25 degrees C, deltaG = -2.4 kJ and deltaH = +1.2kJ. Calculate deltaS for the process.
a soil is 65 saturated with ca cec 10 me100g.nbspa. calculate the lbacre-foot of ca.nbspnbspb. calculate lbs ca in
Identify the subshell in which electrons with the quantum number n = 5, l = 4 are found. (Just write A,B, C, D, or E on the answer sheet) a) 5d b) 5p c) 5g d) 5f e) 4f
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