How many moles of sulfur are in 53.7 grams of sulfur?
What is 1.67 moles of sulfur
100
Which of the following has the largest mass of carbon per gram?
What is CH3CH2OH
100
What is the name of the change from a solid to a gas?
What is Sublimation.
100
A solution is defined as a mixture that is...
What is homogeneous
100
Do acids and bases neutralize each other?
What is Yes, they do neutralize each other.
200
Calculate the number of moles in 82.05 grams of Ca(NO3)2.
What is .50 moles
200
One mole of (NH4)2Cr2O7 contains
What is Seven moles of oxygen
200
Do solids and liquids both show a vapor pressure?
What is Yes, they both show a vapor pressure.
200
True or False: Salt water is a solution.
What is Yes, it is a solutions
200
What is the pH of vinegar?
What is 2.4
300
If you were given a sample of CaCO3 that weighed 36.5 g, how many moles of CaCO3 do you have?
What is .365 moles of CaCO3
300
One atom of an element has a mass of 9.123 x 10-23g. There is only one isotope of the element. The element is:
What is manganese
300
When a pot is heated, does the volume of the water increase or decrease?
What is Increase slightly.
300
Solutions with low concentrations of solutes are...
What is Dilute
300
True or False: Water is a neutral with a pH of 5.
What is False, water is a neutral with a pH of 7.
400
How many water molecules are in 2.0 moles of water?
What is 1.2*10^24
400
Oxygen gas can be produced by decomposing potassium chlorate using the reaction below. If 138.6 g of KClO3 is heated and decomposes completely, what mass of oxygen gas is produced?
What is 54.286 g O2
400
Do solids, liquids, or gases have a definite state?
What is Solids.
400
True or False:Colloids are solutions with very small particles suspended in a liquid.
What is True.
400
A particular vinegar solution has a H3O+ concentration of 0.015 M. What is the pH of the solution?
What is 1.8
500
What is measured by the molar mass of an element or compound?
What is Mass of 6.022*10^23
500
When the equation __Ca(OH)2(aq) + __H3PO4(aq) -->__H2O(g) + __Ca3PO4)2(s) is balanced, how many moles of water will be produced for each mole of calcium phosphate?
What is 6
500
What is the reason that liquids have different normal boiling points?
What is Intermolecular forces are different for different molecules. When the forces are weak the points are low and when the forces are strong the points are high.
500
The concentration of solutions is directly related to...