Search & Filtering
Random samples of size 3 are taken from a population of the numbers 3, 4, 5, 6 , 7 and 8. Construct the sampling distribution of the sample means and determine its standard deviation.
Which of the following is TRUE about the law of conservation of energy? *
a. ∆E_sys = ∆E_surr
b. ∆E_sys = -∆E_surr
c. ∆E_sys - ∆E_surr = 0
d. none of the above
What is the ∆E for a gas that releases 43 J of heat and has 120 J of work done on it. *
a. 55 J
b. 77 J
c. 99 J
d. 110 J
Colligative property depends on the amount of ___________. *
a. Solvent
b. Solute
c. Ions
Which of the following is a characteristic of a non-electrolyte? *
a. Dissolves in water and conducts electricity
b. Dissolves in water but does not conduct electricity
c. A substance made up of ionic bonds
d. A substance formed by transfer electrons
How many moles of KBrO3 are required to prepare 0.0700 moles of Br2 according to the reaction: KBrO3 + 5KBr + 6HNO3 6KNO3 + 3Br2 + 3H2O *
A. 0.210
B. 0.0732
C. 0.0704
D. 0.220
A 500mL solution is made by dissolving 30.0g of NaCl in water. What is the molarity of the solution? *
A. 0.03
B. 1.03
C. 2.03
D. 3.03
A 50-g aqueous solution of phosphoric acid (H3PO4) contains 10.0 g of phosphoric acid. What is the mole fraction of solute? *
A. 0.0501
B. 0.0439
C. 0.415
D. 0.604
- ou must create a class named Bus.
- You should also create a main class named Main.
- In the Bus class, there should be member variables named:
-length, capacity, speed (must be an integer)
-fuel_capacity, fuel_burn_rate (must be a double)
-name, color (must be a string)
- Create a constructor in the Bus class containing the parameters:
-name
-length
-capacity
-color
-speed
-fuel_capacity
-fuel_burn_rate
A coil of wire is situated in a 0.5 T uniform magnetic field. The area of the coil is 2.0 m2. (a) What is the magnetic flux if the angle between the magnetic field and the normal to the surface of the coil is 60°? (b) After 5 s, the magnetic field is now parallel to the normal to the surface, (at 0°).
