Which of the following reactions have a positive ?Srxn? Check
all that apply.
2A(g) + 2B(g) -->5C(g)
2A(g) +3 B(s) --> 4C(g)
A(s) + 2B(g) --> C(g)
A(s) + B(g) -->2C(g)
Which of the following is a true statement? (Check all that
apply.)A technological improvement isolated to one sector can
indirectly result in more production in all other sectors.All points on the PPF are productively efficient.It is possible for a point to be allocatively efficient without
being productively efficient.PPFs slope down for the same reason that the demand curve slopes
down.
Which of the following homeostatic processes requires calcium?
(Select all that apply.)
Check All That Apply
neural communication
blood clotting
bone repair and growthbone repair and growth
production of gametesproduction of gametes
muscle contraction
Part A
Which of the following statements are true regarding
transformers?
Check all that apply.
Check all that
apply.
In a
transformer, if the primary coil contains more loops than the
secondary coil, then it is a step-up transformer.
A
transformer converts mechanical energy into electrical energy.
A
transformer is used to increase or decrease a direct current
voltage.
A
transformer is used to increase or decrease an alternating current
voltage.
In a
transformer, if the secondary coil contains more...
Which of the following reactions in the stratosphere cause an
increase in temperature there?
Check all that apply.
Check all that apply.
O2(g)+hν⟶2O(g)
O(g)+O2(g)⟶O3∗(g)
O(g)+N2(g)⟶NO(g)+N(g)
O3∗
(g)+M(g)⟶O3(g)+M∗(g)
The system: 2A + B ↔ 2C ; initially started with 1 mole of B and
1 mol A in a 1L flask. Keq = 6.8 x 10-5 To
calculate the equilibrium concentrations a simplifying assumption
(approximation) can be made.
True
False
Which of the following describe the σu*
orbital in H2? (Check all that apply.)
a. This orbital has a node coincident with the internuclear
axis.
b.This orbital is not symmetric with respect to inversion.
c.This is an "anti-bonding" orbital. This orbital has
a node perpendicular to the internuclear axis.
d. This is a "bonding" orbital.
Which of the following objects are chiral? Check all that
apply:
a wheelbarrow
a mug with MOM written to one side of the handle
a mug with MOM written opposite the handle
a remote control device
a nail
a screw
a mug with BOB written opposite the handle
a mug with BOB written to one side of the handle