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For which cation does fluoride ion have no masking effect? Al_Mo_Be_Fe
Why would the pH of your blood plasma increase if you breathe fast?
A Ricocheting Bullet.
0.100-kg stone rests on a frictionless, horizontal surface. A bullet of mass 6.00 g, traveling
horizontally at 350 m/s, strikes the stone and rebounds horizontally at right angles to its original direction with a speed of 250
m/s.
(a)
Compute the magnitude and direction of the velocity of the stone after it is struck.
(b)
Is the collision perfectly elastic?
A 0.150-kg frame, when suspended from a coil spring, stretches the spring 0.050 m. A
0.200-kg lump of putty is dropped from rest onto the frame from a height of 30.0 cm (Fig.).
Find the maximum distance the frame moves downward from its initial position.
the
spring to
find the force constant
k
of the spring. Let
s
be the amount the spring is stretched.
A 0.150-kg frame, when suspended from a coil spring, stretches the spring 0.050 m. A
0.200-kg lump of putty is dropped from rest onto the frame from a height of 30.0 cm (Fig.).
Find the maximum distance the frame moves downward from its initial position.
the
spring to
find the force constant
k
of the spring. Let
s
be the amount the spring is stretched.
a cube with edge length of 10cm is inscribed in a sphere, what is the surface area of the sphere
A reaction has a rate constant, k = 1.29 s-1. What is the half-life (seconds) when the initial concentration is 0.784 M?
Direction: Solve the following problems. Attach your solutions.
1. Calculate the standard enthalpy ∆H°, for the following reaction:
2CH3OH (l) + 3O2 (g) ---> 2CO2 (g) + 2H2) (g)
Given: CH3OH (l) ∆Hf° = - 238.7 kJ
CO2 (g) ∆Hf° = - 393.5 kJ
H2O (l) ∆Hf° = - 285.8 kJ
Essay.
Water, compared to other substances, has one of the highest specific heat values. What is the advantage of this fact for the human body?
1. Calculate the enthalpy change for the following chemical reaction:
CS2(1) + 3O2(g) ---> CO2(g) + 2SO2(g)
1.C(s) + O2(g) ---> CO2(g) ∆H° = - 393.5 kJ
2.S(s) + O2(g) ---> SO2(g) ∆H° = - 296.8 kJ
4.C(s) + 2S(s) ---> CS2(1) ∆H° = + 87.9 kJ
A certain population has a variance of 2.5, and a sample size of 4 is used to obtain the sampling distribution of the sample mean of this population. What is the variance of the sampling distribution of the sample mean?
Write your answer as a fraction in lowest terms.
#340153 on Dec 2023