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Calculate rate constant for 1. level reaction where 81% of the matters have already react after 27 seconds.
Which of the following best describes the motion of the particles in a piece of steel? None are moving. A few are moving. All are moving. Most are moving.
Does purified aspirin appear to be purer than crude aspirin? What is your evidence?
Use of fossil fuels - Should we be burning the raw materials for medicine and polymers? Where will we be in 50 years on this issue?
If 19.2 g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O, how many grams of H2O are produced in this reaction.
A major oil company has used a gasoline additive called MMT to boos the octane rating of its gasoline. What is the emperical formula of MMT if it is 49.5% C, 3.2% H, 22.0% O, and 25.2% Mn.
In the tin oxide laboratory activity, what was the color of the vapor emitted when the nitric acid was added to the tin.
how many grams of K2SO4 would you need to prepare 1500g of 5.0% K2SO4 (m/m) solution?
determine How many formula units(formula un) of sodium iodide(NaI) are present in 9.54 grams of this compound and also calculate how many gms of sodium iodide are present in 6.07E+21 formula units of this compound.
Compute the mass of salt required to bring the freezing point of 200 mL of H 2 O from 0 degrees C to -5 degrees C.
the products formed are sodium bromide and hydrogen sulphite. Calculate the mass of sodium bromide produced.
What mass of ethanol, C2H5OH a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0C? Assume the density of water is 1.0 g/mL. Kf of water is 1.86C/m.
The % mass composition of 0.1458g sample of a compound was measured by burning the compound in an excess of oxygen.
How many joules of heat are required to heat 143 g of aluminum from 55.0 oC to 66.5oC?
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