The equation below shows the decomposition of lead nitrate. How many molecules of PbO are produced when 11.5 g NO2 is formed?2Pb(NO3 )2 (s) → 2PbO(s) + 4NO2 (g) + O2 (g)
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Adding solvent or removing solute from a soltuion is called __________, and a solution is said to be _______________ if it has more solute.
What mass precipitate will form of 1.50 L of highly concentrated Pb(Clo3)2 is mixed with 0.300 L of 0.110 M NaI
b. Crude oil
c. Natural gas
d. Nuclear energy
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Given that:
delta Tb = Kbm Kb H2O = 0.52 degrees C/m
delta Tf = Kfm Kf H2O = 1.86 degrees C/m
We need to know the formula for Molality.
molality = mol solute / kg solvent
We are given the amount of solute in grams
Since amount of solute is given in moles, we have to convert 25 g NaCl to moles. Divide by molar mass.
25 g NaCl / 58.5 g/mol = 0.427 mol
Then, use the formula for molality.
molality = mol solute / kg solvent
= 0.427 / 1
= 0.427 m
Use now the formula to get the boiling point.
delta Tb = Kbm
= (0.52)(0.427)
= 0.22C
B. 12 carbon atoms
C. 24 carbon atoms
D. 3 carbon atoms
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The fewer the carbon atoms, the closer it is to being a gas. The only one you have to check out is A which is hexane. You know that gasoline at the pumps has 8 carbons and its a liquid. So B and C are both not gases because they are above 8.
C6 (hexane) is a liquid at room temperature not a gas.
The answer is D. If there is a gas present, it must be C3
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Answer:
Average speed of the racer is 5.8 m/s.
Explanation:
Total distance covered by racer = D = 406 m
Total time taken racer= T = 70 seconds
The formula of an average speed is given by:
Average speed :
Average speed of the racer is:
5.8 m/s=406/70
1km = 100m
1h= 3600s
(5.8m/s)(1km/100m)(3600s/1h)
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The ratio of atoms in HCl is
- 1:1
The ratio of atoms in hydrogen chloride shortened as HCl is 1:1. This is because there is only one atom of hydrogen that is reacted with another atom of chlorine. A ratio indicates the relative sizes of two or more quantities.
When given another compound like H₂ SO₄, we can describe the elements as being in the ratio of 2:1:4. Thus, we can see the relative quantities of the individual elements in the given compound.
In conclusion, the ratio of atoms in HCl is 1:1.
Learn more about the ratio of atoms here:
Answer:
Each molecule of HCl is composed of a one-to-one ratio of hydrogen and chlorine.
Explanation:
At room temperature, HCl is a colorless, poisonous gas. Dissolve it in water, and, voilà, you have hydrochloric acid. For the record, acids are substances that release hydrogen ions in water. The more hydrogen ions an acid releases in water, the stronger the acid (see "What is an ion?" below). If you concluded from the above discussion that HCl releases many hydrogen ions in water, you are right!