YAY Math!
More Math Duh
It's Giving Scientist
EQUATIONS
T/F
100
What does 1 millimeter of mercury (1 mmHg) equal in torr?
1 torr
100
How many atoms are in exactly one mole of atoms?
6.022 x1023
100
Which step of the scientific method involves thinking about nature to develop an idea about how something works?
hypothesizing
100
Determine the reaction type: combination, decomposition, double-displacement, single-displacement.
Zn (s) + 2 HCl (aq) --> H2 (g) + ZnCl2 (aq)
single-displacement!
100
T/F:The amount of force exerted upon a surface per unit of area is pressure.
true
200
What is a MICROsecond in Scientific notation? 10? s
-6 (micro: one millionth)
200
What does standard atmosphere (atm) equal in torr?
760 torr
200
Which law implies that, at constant temperature and pressure, the molar volume of an ideal gas is constant?
Avogadro's Law!
200
What is the empirical formula of C40H56
C5H7
200
T/F: In the solid state of matter, particles have enough energy to MOVE FREELY but not enough energy to overcome their attraction for each other.
false; liquid
300
A sample of hydrogen gas has a VOLUME of 4.4 L at a PRESSURE of 800. torr. If the pressure decreases to 400. torr, what will the NEW VOLUME be?
8.8 L
300
What is the molar mass of diborane (B2H6)?
(MB =11 u; MH =1 u
28 g/mol
300
Browning meat is an example of a ______ change.
chemical-- can't go back!
300
Balance.
Al (s) + HCl (aq) --> AlCl3 (aq) + H2 (g)
2.... 6..... --> 2..... + 3......
300
T/F:The link between the microscopic and macroscopic levels of chemistry is Avogadro's number.
True!
400
A sample of nitrogen occupies 1.00 L at a TEMPERATURE of 250. K. What VOLUME would it occupy at 1500. K?
6.00 L
400
What does 1.5m equal?
15 km, 15 mm, 15 dm, 15 cm
15 dm (1.5 x 10)
400
Combining volumes has to do with whose law?
Gay-Lussac's law
400
Which of the following gases would you expect to diffuse fastest: H2, CH4, or C3H8?
H2.... there's less of it
400
T/F: Gas molecues are WEAKLY but SIGNIFICANTLY attracted to each other.
false..
500
A weather balloon contains 563 L of hydrogen gas. If the TEMPERATURE and PRESSURE at the surface are 288 K and 1.00 atm when the balloon is released, what will its VOLUME be at 32.0 km above the surface, where temperature and pressure are 229 K and 8.57 x 10-3 atm?
52,200 L
500
What does 5300g equal?
5.3 kg, 5.3 mg, 5.3 ug, 5.3 cg
5.3 kg
500
When food coloring dye is dropped into water, the dye spreads throughout the water until they are evenly mixed. Name the molecular process that causes the dye and water to mix.
Diffusion
500
2 NaCl (l) ---> 2 Na(l) + Cl2(g)
What volume of Cl2 at 293 K (20.oC) and 1.00atm can be obtained from 68.0g NaCl using this reaction?
(MNaCl = 58.44g/mol; R=0.0821 L*atm/[K*mol])
14.0 L
500
According to the deal gas law, the volume of a gas will decrease to 0 at a temp. of 0 K, if there's a constant pressure
true!