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The pH in the stomach of a certain animal is 3.8. This means that the hydrogen ion concentration in the stomach is: A. 3.8 X 10-14 M B. - log(3.8) M C. [H+] < [OH-] D. antilog(3.8) M E. 10-4 M < [H+] < 10-3 M
Check all that apply Water is important to life because: - it does not dissolve certain substances - it causes brownian motion - it is colorless and odorless
A piece of copper alloy with a mass of 60.0 g is heated from 21.0 ?C to 44.0?C. In the process, it absorbs 507 J of energy as heat. What is the speci?c heat of this copper alloy.
Important information about Molar concentrations, Calculate the molar concentrations, I-, disulfur octaoxide, disulfur trioxide.
The half-life for the reaction at 550 C is 81.3 seconds. How long does it take for 78.5% of a phosphine sample to decompose?
A piece of metal of mass 13 g at 103?C is placed in a calorimeter containing 53.5 g of water at 21 ?C. The ?nal temperature of the mixture is 57.2 ?C. What is the speci?c heat capacity of the metal.
What is the density of a block of marble that occupies 253 cm3 and has a mass of 752 g?
Determine the number of significant digits in each number and write out the specific significant digits.
At 4.00 L, an expandable vessel contains 0.864 mol of oxygen gas. How many liters of oxygen gas must be added at constant temperature and pressure
Calculate the work done (in Joules) when 33.3g of tin dissolves in excess acid at 1.04 atm and 22 degrees C. Assume ideal gas behavior.
What one reagent should re-energize the light solution after it has faded? Explain using moles and limiting reagents.
If, in a certain experiment, over a specific time period, 0.0035 mol PH3 is consumed in a 2.0 L container during each second of reaction, what are the rates of production of P4 and H2 in this experiment?
Determine the percent yield for the reaction between 45.9g of NaBr and excess chlorine gas to produce 12.8g of NaCl and an unknown quantity of bromine gas.
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