Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
48 Cards in this Set
- Front
- Back
|
What is the balanced equation for the combustion of sulfur?
|
S(s) + O2(g) → SO2(g)
|
|
|
In the word equation, sodium oxide + water → sodium hydroxide, the formula for |
NaOH
|
|
|
The reaction represented by the equation Cl2(g) + 2KBr(aq) → 2KCl(aq) + Br2(l) is a(n) |
single-displacement reaction
|
|
|
The reaction represented by the equation 2KClO3(s) → 2KCl(s) + 3O2(g) is a(n) |
decomposition reaction
|
|
|
The reaction represented by the equation Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) is a |
double-displacement reaction
|
|
|
The reaction represented by the equation Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq) is a |
single-displacement reaction
|
|
|
In what kind of reaction do the ions of two compounds exchange places in aqueous solution to form two new compounds? |
double-displacement reaction
|
|
|
In what kind of reaction does a single compound produce two or more simpler substances? |
decomposition reaction
|
|
|
The equation A + X → AX is the general equation for a(n |
synthesis reaction
|
|
|
In what kind of reaction does one element replace a similar element in a compound? |
displacement reaction
|
|
|
In the chemical equation 2Mg(s) + O2(g) ? 2MgO(s),
|
Mg represents the reagent magnesium
|
|
|
A chemical equation is balanced when the
|
same number of each kind of atom appears in the reactants and in the products.
|
|
|
According to the law of conservation of mass, the total mass of the reacting substances is |
always equal to the total mass of the products
|
|
|
What is the small whole number that appears in front of a formula in a chemical equation?
|
a coefficient
|
|
|
In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is |
H2
|
|
|
Which of the following molecular formulas does not have the corresponding empirical formula XY2Z?
|
XYZ
|
|
|
The molecular formula for vitamin C is C6H8O6. What is the empirical formula?
|
C3H4O3
|
|
|
A molecular compound has the empirical formula XY3. Which of the following is a possible molecular formula?
|
X2Y6
|
|
|
A compound contains 64 g of O and 8 g of H. What is the empirical formula for this compound?
|
H2O
|
|
|
A compound contains 259.2 g of F and 40.8 g of C. What is the empirical formula for this compound?
|
CF4
|
|
|
What is the empirical formula for a compound that is 43.6% phosphorus and 56.4% oxygen?
|
P2O5
|
|
|
The empirical formula may not represent the actual composition of a unit of a(n) |
molecular compound |
|
|
The empirical formula for a compound shows the symbols of the elements with subscripts indicating the
|
smallest whole-number ratio of the atoms.
|
|
|
The empirical formula is always the accepted formula for a(n) |
ionic compound
|
|
|
A formula that shows the simplest whole-number ratio of the atoms in a compound is the |
empirical formula
|
|
|
What is the mass percentage of chlorine in NaCl?
|
60.7%
|
|
|
What is the percentage composition of CO?
|
43% C, 57% O
|
|
|
What is the percentage composition of CF4? |
13.6% C, 86.4% F
|
|
|
How many molecules are there in 5.0 g of methyl alcohol, CH3OH?
|
9.4 1022
|
|
|
How many Mg2+ ions are found in 1.00 mol of MgO?
|
6.02 1023
|
|
|
How many OH– ions are present in 3.00 mol of Ca(OH)2?
|
3.61 1024
|
|
|
How many Cl– ions are present in 2.00 mol of KCl?
|
1.20 1024
|
|
|
The molar mass of LiF is 25.94 g/mol. How many moles of LiF are present in 10.37 g? |
0.3998 mol
|
|
|
What is the formula mass of ethyl alcohol, C2H5OH?
|
46.08 amu
|
|
|
The molar mass of an element is the mass of one |
mole of the element
|
|
|
What is the formula for hydrochloric acid?
|
HCl
|
|
|
What is the formula for sulfur dichloride? |
SCl2
|
|
|
What is the formula for dinitrogen trioxide?
|
N2O3
|
|
|
What is the formula for silicon dioxide?
|
SiO2
|
|
|
Name the compound SO3
|
sulfur trioxide
|
|
|
Name the compound SiO2
|
silicon dioxide
|
|
|
Name the compound Fe(NO3)2
|
iron(II) nitrate
|
|
|
Name the compound Ni(ClO3)2
|
nickel(II) chlorate
|
|
|
What is the formula for the compound formed by lead(II) ions and chromate ions? |
PbCrO4
|
|
|
What is the formula for the compound formed by calcium ions and chloride ions?
|
CaCl2
|
|
|
What is the formula for zinc fluoride? |
ZnF2
|
|
|
The formula for carbon dioxide, CO2, can represent |
a. one molecule of carbon dioxide.b. 1 mol of carbon dioxide molecules.c. the combination of 1 atom of carbon and 2 atoms of oxygen.d. all of the above. |
|
|
How many atoms of fluorine are present in a molecule of carbon tetrafluoride, CF4?
|
4
|
