Report to 2 decimal places
Answer Options:
Answer: 1.35
Question: Name this compound: Zn3(PO4)2.
Answer Options:
Answer: zinc phosphate
Question: A gas at STP has a volume and mass of 20.504 mL and 58.61 g, respectively. What is the molar mass of this gas?
Answer Options:
Answer: 64.07 g/mol
Question: Under extreme conditions, a new ion with the chemical formula SiO4^2- is discovered. Using the rules covered in class, what is the oxidation state of the silicon in the ion?
Answer Options:
+2
-4
-3
+1
+4
-3
-1
+2
0
3.00E-007
Answer: +4
Question: If 4.0 grams of sodium metal and 4.0 grams of chlorine gas react, how much (in grams) NaCl is produced?
Answer Options:
Answer: 6.59
Question: The smallest particle of an element that retains the characteristics of the element is a(n) ______.
Answer Options:
Answer: atom
Question: A vineyard has 145 acres of Chardonnay grapes. A particular soil supplement requires 5.50 kg for every square meter of vineyard. How many kilograms of the soil supplement are required for the entire vineyard? (Use this conversion: 1 acre = 4046.85642 m^2)
Answer Options:
Answer: 2,614.75
Question: The chemical formula for a certain ionic compound is M5(SO4)3. Assume M is a cation. If the Ksp for the compound at 25°C is 8.30 x 10^-20, determine the solubility of the ionic compound in water at 25°C.
Answer Options:
9.11 x 10^-7 M
5.72 x 10^-6 M
4.15 x 10^-7 M
4.36 x 10^-9 M
3.20 x 10^-6 M
2.75 x 10^-8 M
Answer: 4.36 x 10^-9 M
Question: Wilson is such a dork that when he found a strange rock on walk through JHU’s Arboretum, he brought it back to the lab to study it. It turns out that he discovered a new element! He named it wilsonium, Wl. While studying it, he noticed that the rock is really shiny. He stuck it with a hammer, and it shattered into pieces. He hooked a voltmeter up to it and discovered that it conducts electricity, but not well. When he reacted it to study the compounds it forms, he discovered that it forms a compound with chlorine: WlCl4. Based on these properties, what type of element is wilsonium?
Answer Options:
metalloid
metal
nonmetal
Not enough information to determine this.
Answer: metalloid
Question: Calculate the amount, in grams, of solute needed to prepare this solution: 161 g of a 43.5% (m/m) LiBr solution.
Answer Options:
Answer: 70.04
Question: Which of these molecules would exhibit capillary depression?
Answer Options:
CSO
NH3
CO2
HCN
Answer: NH3
Question: Calculate the number of grams of solute needed to prepare 1.60 L of a 2.390 M NaCl solution.
Answer Options:
Answer: 215.06
Question: When a solution is made by combining 2.5 grams of CCl4 and 4.5 g of benzene, which compound is the solvent?
Answer Options:
Answer: benzene