When the equation H2O + NO2 NO + HNO3 is balanced, the sum of all the coefficients (both written and understood) is ______________.
Fill in the blank(s) with correct word
[Ques. 2] An automobile travels due north with a speed of 68 km/h and an acceleration of 1.5 m/s2 . All forces considered, the unbalanced force acting on the auto is
a. zero.
b. southward.
c. northward.
d. downward.
e. upward.
[Ques. 3] In chemical equations, numbers placed before formulas are known as ______________.
Fill in the blank(s) with correct word
[Ques. 4] An automobile travels due north with a constant speed of 81 km/h. All forces considered, the unbalanced force acting on the auto is
a. zero.
b. southward.
c. northward.
d. downward.
e. upward.
[Ques. 5] When the forward and reverse reactions are proceeding at the same rate, the reaction is said to have reached ______________.
Fill in the blank(s) with correct word
[Ques. 6] Two equal and opposite forces of 6.0 N act on an object. The unbalanced force on the object
a. is 6.0 N.
b. is 0 N.
c. is 8 N.
d. is 12 N.
e. cannot be determined from given information.
[Ques. 7] 6.02 1023 is known as ______________.
Fill in the blank(s) with correct word
[Ques. 8] Mass is a measure of
a. inertia.
b. force.
c. grams.
d. weight.
e. kilograms.
[Ques. 9] The substances formed in a chemical reaction are called the ______________.
Fill in the blank(s) with correct word
[Ques. 10] A mass is accelerated when ______________ acts upon the mass.
a. a balanced force
b. any force
c. no force
d. an unbalanced force
e. none of these
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