Compounds
The formula, C14H10O4, is an empirical formula.
False
Actual empirical formula: C7H5O2
TRUE or FALSE
Oxidation is the gain of electrons.
False
TRUE or FALSE
The theoretical yield can be calculated from any reactant.
False
Balance the following equation:
K + CuCl2 -> Cu + KCl
2 K +CuCl2 -> Cu + 2 KCl
TRUE or FALSE
One mole of Carbon will always have a mass of 12.01g.
What is the central atom in CH2O?
C
Positively charged ions are called _____
The limiting reagent can be identified because it...
produces the least amount of product
Classify the following reaction:
CaCO3 (s) -> CaO (s) +CO2 (g)
Decomposition
Which element has chemical properties most similar to magnesium (Mg)?
Sr, Cs, Fe, S, or I
Sr
Which of the following are compounds?
N2O, H2O, O, Br2, C8H10N4O2
N2O, H2O, Br2, C8H10N4O2
*50 bonus point if anyone knows what this compound C8H10N4O2 is*
TRUE or FALSE
Radio waves have a longer wavelength than gamma rays.
True
How many significant figures are appropriate to show in the result?
(13.2+0.537) ÷ 100.078
Three
= 0.137
Which of the following compounds are are insoluble?
A. Co3(PO4)2 B. Pb(NO3)2 C. CuCO3
A and C
How many valence electrons does Carbon have?
4
What is the formula for Copper (II) Chloride?
CuCl2
Which element(s) would have 2 electrons in its Lewis dot structure?
Br, Ne, Mg, O, Ba
Mg and Ba
How many moles are in 22.7g of silver (Ag)?
Molar mass of Ag = 107.9 g/mol
0.21 mol Ag
What would be the products in this precipitation reaction?
AgNO3 (aq) + KCl (aq) -> ??
AgCl (s) + KNO3 (aq)
What is the electron configuration for Cl? Use noble gas notation.
[Ne]3s23p5
Name the compound: NaNO2
Sodium Nitrite
What is the Molecular Geometry of CO2?
Linear
How many molecules of NH4Br are in 4.246 g of NH4Br?
2.611x1022 molecules of NH4Br
What is the net ionic equation for this reaction?
MgCl2 (aq) + AgNO3 (aq) -> AgCl (s) + Mg(NO3)2
Ag+ (aq) + Cl- (aq) -> AgCl (s)
How many unpaired electrons does Fe (Iron) have?
4