Chemistry
Which of the following substances is water soluble:
W) ethanol
X) dichloro-methane
Y) chloroform
Z) benzene
W) Ethanol
Components of blood (bonus 50 pts for listing their functions)
white blood cells: immune responses, red blood cells: carry nutrients and oxygen, platelets: blood clotting, plasma: osmotic balance, pH buffering, transports nutrients and wastes
The work done by a friction force is:
w) always positive
x) always negative
y) always zero
z) either positive or negative depending upon the situation.
ALWAYS NEGATIVE
What is the smaller of two integers whose sum is 19 and whose product is 48?
3
What do you call pieces of rock thrown into the air during volcanic eruption?
Tephra
What is the principal intermolecular force that must be overcome when n-hexane (C6H14, bp = 69 °C) is vaporized?
(A) Hydrogen bonding
(B) Covalent bonding between carbon atoms
(C) Dipole-dipole forces
(D) London dispersion forces
D) London dispersion forces
What is ideal blood pressure for adult? (Hint: systolic/diastolic)
90-120/ 60-80 (systolic: contraction of ventricles/ diastolic: contraction of atria)
Work is equal to which of the following?
w) the cross product of force and displacement.
x) the product of force times time
y) force divided by time
z) the dot product of force and displacement
THE DOT PRODUCT OF FORCE AND DISPLACEMENT
Giving your answer in standard form, what is the last term in the binomial expansion of the following: (x + y)6
y6
Which of the following is best classified as a plutonic intrusive rock:
W) obsidian
X) granite
Y) basalt
Z) pumice
X) Granite
An organic compound contains only carbon, hydrogen, nitrogen, and oxygen. It is 61.71% C, 4.03% H, and 16.00% N by mass. What is its empirical formula?
C9H7N2O2
Name at least two organs that are involved in the lymphatic system
Tonsils, Thymus gland, Lymph nodes, bone marrow, spleen
A satellite is in a circular orbit about the Earth. Over a long period of time, the effects of air resistance decrease the satellite’s total energy by 1 J. The kinetic energy of the satellite:
(A) increases by 1 J.
(B) remains unchanged.
(C) decreases by 1 2 J.
(D) decreases by 1 J.
(E) decreases by 2 J.
(A) increases by 1 J
One-fifth of 0.04% is equal to:
8 × 10–5
The fertilizer potash provides plants with what element necessary for healthy growth and which is also the seventh most abundant element on Earth?
Potassium
Hydrogen and oxygen gas are combined in a reaction vessel and reacted completely to form water. What volumes of gases (at STP) will give the greatest mass of water?
(A) 1.0 L H2 and 4.0 L O2
(B) 2.0 L H2 and 3.0 L O2
(C) 3.0 L H2 and 2.0 L O2
(D) 4.0 L H2 and 1.0 L O2
C) 3.0 L H2 and 2.0 L O2
Which hormone is responsible for increased reabsorption of H2O from the kidney? (This is one of the two hormones that is released from anterior-posterior gland)
A packing crate with mass m = 115 kg is slid up a 5.00 m long ramp which makes an angle of 20.0 ◦ with respect to the horizontal by an applied force of F = 1.00 × 103 N directed parallel to the ramp’s incline. A frictional force of magnitude f = 4.00 × 102 N resists the motion. If the crate starts from rest, what is its speed at the top of the ramp?
(A) 4.24 m/s (B) 5.11 m/s (C) 7.22 m/s (D) 8.26 m/s (E) 9.33 m/s
(A) 4.24 m/s
Which of the following numbers is evenly divisible by both 11 and 3:
W) 7791
X) 7553
Y) 5181
Z) 8769
Y) 5181
What are the proper names of the 5 celestial bodies called wanderers by Greek astronomers because they had unusual paths in the sky throughout the year?
MERCURY; VENUS; MARS; JUPITER; SATURN
Addition of 10 mL of distilled water to 0.1 g of which salt produces a yellow, slightly cloudy solution?
(A) KMnO4
(B) FeCl3
(C) Co(NO3)2
(D) CuSO4
B) FeCl3; Ferric chloride forms hydrates upon exposure to water, reflecting its Lewis acidity.
Order of blood flow through the heart during pulmonary circulation (pumping of deoxygenated blood) and systemic circulation (puming of oxygenated blood)
A 3.0 kg mass moving at 30 m/s to the right collides elastically with a 2.0 kg mass traveling at 20 m/s to the left. After the collision, the center of mass of the system is moving at a speed of
(A) 5 m/s (B) 10 m/s (C) 20 m/s (D) 24 m/s (E) 26 m/s
B) 10m/s
Out of five mass extinction periods in the Earth's history, which one killed off the dinosaurs?
A) End Ordovician (444 milion years ago)
B) Late Devonian (360 mya)
C) End Permian (250 mya)
D) End Triassic (200 mya)
E) End Cretaceous (65 mya)
E) End Cretaceous (65 mya)