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100
This is standard pressure in atm.
What is 1atm?
100

This is how many extra electrons are in the Lewis structure of the sulfate ion, SO42–.

What is 2?

100
This acid is produced in the stomach.
What is hydrochloric acid?
100
The constant bombardment of gas molecules against the inside walls of a container produces this.
What is pressure?
100
Neon-22 contains 12 neutrons. It also contains this many protons.
What is 10?
200
These values were recorded as the mass of products when a chemical reaction was carried out three separate times: 9.83 g; 9.84 g; 9.82 g. The mass of products from that reaction is 8.60 g. The values are
What is precise but not accurate?
200
According to the law of conservation of mass, the total mass of the reacting substances is
What is always equal to the mass of the products?
200
A chemical reaction involving substances A and B stops when B is completely used. B is the
What is limiting reactant?
200

This is what alpha particles are:

What is Helium nuclei?

200
An atom is
What is the smallest unit of matter that maintains its chemical identity?
300
In drawing a Lewis structure, each nonmetal atom except hydrogen should be surrounded by
What is 8 electrons?
300
How many minutes are in 1 week?
What is 10,080 min?
300

In the equation 2Al(s) + 3Fe(NO3)2(aq)--> 3Fe(s) + 2Al(NO3)3(aq), aluminum replaced

What is iron (Fe)?

300
In most chemical reactions the amount of product obtained is
What is less than the theoretical yield?
300

The reaction represented by the equation 2HgO(s) --> 2Hg(l) + O2(g) is a(n)

What is decomposition reaction?

400
The half-life of an isotope is the time required for half the nuclei in a sample to
What is undergo radioactive decay?
400

For the reaction represented by the equation C + 2H2--> CH4, this is this is the mole ratio of hydrogen to methane, CH4.

What is 2:1?

400

This is the density of a 14 gram cube with a volume of 27 cm3

What is 0.52 g/cm3?

D=m/v  = 14g/27cm3 = 0.51851... = 0.52 g/cm3

400

When U-235 absorbs a neutron and splits into Ba-141, Kr-92 and 3 neutrons it is this type of reaction:

What is fission?

400

When Hydrogen-2 and Hydrogen-3 combine to form Helium-4 is this type of reaction: 

What is fussion?

500

For the reaction represented by the equation 2H2 + O2 --> 2H2O, this is how many grams of water are produced from 6.00 mol of hydrogen.

What is 108g?

500

When the equation __NaI +__Pb(SO4)2 -->__PbI4 + __Na2SO4 is correctly balanced, this is the coefficient of NaI?

What is 4?

500

The density of aluminum is 2.70 g/cm3. What is the mass of a solid piece of aluminum with a volume of 1.50 cm3?

What is 4.05g?

D=m/v  m=DV  = 2.70 g/cm3 x 1.50 cm3 = 4.05 g

500
If the temperature of a fixed quantity and volume of gas changes, what also changes?
What is pressure?
500

When this equation is balanced this is what goes in the blank:  

22688Ra -> 222 86 Rn + _____

What is an alpha particle ( 42He)?