When an acid reacts with a carbonate or hydrogen carbonate, the products are water, ______________, and a salt.
Fill in the blank(s) with correct word
[Ques. 2] An object will ______________ in a fluid if its average density is ______________ the density of the fluid.
a. sink; greater than
b. float; equal to
c. sink; less than
d. float; twice
[Ques. 3] The definitions of an acid and a base as substances that give H+ and OH- ions, respectively, in water were proposed by the chemist named ______________.
Fill in the blank(s) with correct word
[Ques. 4] An object will ______________ in a fluid if its average density is ______________ the density of the fluid.
a. float; greater than
b. float; less than
c. sink; less than
d. sink; equal to
[Ques. 5] If two clear solutions are mixed and solid particles form, the particles are called a(n) ______________.
Fill in the blank(s) with correct word
[Ques. 6] On which planet (other than Earth) have air bags been deployed?
a. Venus
b. Mars
c. Mercury
d. Saturn
[Ques. 7] The H3O+ ion is called the ______________ ion.
Fill in the blank(s) with correct word
[Ques. 8] An automobile air bag
a. increases the contact time in stopping a person.
b. reduces the impact force in a collision.
c. increases the surface area of the impact force.
d. does all of the above.
[Ques. 9] According to the Arrhenius theory, basic properties are caused by ______________ ions.
Fill in the blank(s) with correct word
[Ques. 10] It is generally easier to push an object once it is moving than when you are getting it started. This is because
a. sliding friction is zero.
b. sliding friction is less than static friction.
c. static friction is less than sliding friction.
d. static friction is zero.
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