Deck 6 (101 - 120) Flashcards
- Give the name to:
Cl-CH2-COOH
2-chloroethanoic acid
- Catalysts increase the rate of a chemical reaction by means of:
a. increasing temperature
b. lowering activation energy
c. increasing the concentration of reactants
d. increasing collision energy
b. lowering activation energy
- A bond where electrons are shared is called a/an ?
covalent bond
- Which of the following conditions will always increase the rate of a chemical reaction?
a. an increase in pressure
b. a decrease in pressure
c. an increase in concentration of reactants
d. an increase in temperature
c. an increase in concentration of reactants
- To determine the molarity of a HCl solution, you need to know the number of …
moles of HCl in 1 L of solution
- What is the molar concentration of a solution that contains 125g NaCl (Mm = 58.44 g.mol-1) in 4.00 L solution?
a. 0.535 mol.dm-3 NaCl
b. 2.14 mol.dm-3 NaCl
c. 8.56 mol.dm-3 NaCl
d. 31.3 mol.dm-3 NaCl
a. 0.535 mol.dm-3 NaCl
- The atom has Z = 27 and A = 60. How many protons and electrons are in this atom?
Protons: 27
Electrons: 27
- Chemical bonds may be produced by any of the following processes involving electrons except:
a. gaining electrons
b. splitting electrons
c. sharing electrons
d. losing electrons
b. splitting electrons
- PIC
- An atom or group of atoms that have a net positive or net negative charge is a(n) …
ion
- Give the number of lone pairs in the molecule of oxygen
2
- Select the correct formula for tin(IV) oxide:
a. SnO2
b. SnO
c. SnO4
d. Sn2O3
a. SnO2
- All of the following are heterogenous mixtures except:
a. whole wheat bread
b. granite
c. tap water
d. oil-water mixture
c. tap water
- The principle quantum number of an orbital is 4. What are the possible angular momentum quantum numbers?
0, 1, 2, 3
- What is the molar concentration of a 500 ml solution that contains 60.0 g of NaOH?
Mm(NaOH) = 40 g.mol-1
a. 0.8 mol.dm-3
b. 1.5 mol.dm-3
c. 3.0 mol.dm-3
d. 6.0 mol.dm-3
3.0 mol.dm-3
