General Questions and Answers

Science The concentration of hydrogen ions in household dish
Physical Chemistry
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Science The concentration of hydrogen ions in household dish detergent is 10-12. What is the pH level of household dish detergent?
A chemist needs to mix a 20% alcohol solution with a 50%
Physical Chemistry
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A chemist needs to mix a 20% alcohol solution with a 50% alcohol solution to get 15 liters of a 36% alcohol solution. How many liters of the 20% solution should be used? How many liters of the 50%
The formula for pH is pH = -log [H+], where [H + ] is the
Physical Chemistry
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The formula for pH is pH = -log [H+], where [H + ] is the hydrogen ion concentration. The pH of a fruit juice is 3.2. What is the hydrogen ion concentration of the juice? The hydrogen ion
How many grams of strontium are in 2.92 moles of strontium?
Physical Chemistry
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How many grams of strontium are in 2.92 moles of strontium? [?] g Sr
How many moles is equivalent to 72.9 g Mg? The molar mass of
Physical Chemistry
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How many moles is equivalent to 72.9 g Mg? The molar mass of Mg is 24.31 g/mol. [?] moles Mg
How many grams of copper are in 3.42 moles of copper? The
Physical Chemistry
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How many grams of copper are in 3.42 moles of copper? The molar mass of copper is 63.55 g/mol. [?] g Cu
Prepare 120 mL 70% alcohol from 85% alcohol and 40% alcohol.
Physical Chemistry
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Prepare 120 mL 70% alcohol from 85% alcohol and 40% alcohol. 1. What volume (mL) of 85% alcohol should be used? 2. What volume (mL) of 40% alcohol should be used?
The gas law for an ideal gas at absolute temperature 7 (in
Physical Chemistry
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The gas law for an ideal gas at absolute temperature 7 (in kelvins), pressure P (in atmospheres, atm), and volume V (in liters) is PV = nRT, where n is the number of moles of the gas and R = 0.0821 is
Which of the following is/are synthesis reactions? 1. 1CH4
Physical Chemistry
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Which of the following is/are synthesis reactions? 1. 1CH4 (g) +2O₂ (g) --> 1CO₂ (g) + 2H₂(l) 2. 1 Ca(s) + 1CO₂ (g) --> 1 CaCO3 (s) 3. 2Mg(s) + 1O₂ (g) --> 2Mg(s) 4. 1PbCO3 (s)--> 1Pb(s) + 1CO₂ (g) a
An atom has the atomic number of 48. a. What element is
Physical Chemistry
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An atom has the atomic number of 48. a. What element is this? b. What family of elements is this element in? c. How many protons does it have? d. How many electrons does it have? e. If the total mass
Label if each is lonic, Covalent, or Both NH3 Na3PO4 K₂S
Physical Chemistry
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Label if each is lonic, Covalent, or Both NH3 Na3PO4 K₂S H₂SO4
Name the following compounds or Figure out the formula: MgF2
Physical Chemistry
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Name the following compounds or Figure out the formula: MgF2 Ca(OH)2 TiBr4 HCI