A.How many moles of hydrogen do you have?
2.0158 g H2 ( 1 mol / 2.02 g ) = 1.00 mol H2
B. How many moles of oxygen would react with this much hydrogen?The chemical reaction would be:
H2 + 1/2O2 = H2O
1.00 mol H2 ( 1/2 mol O2 / 1 mol H2 ) = 0.50 mol O2
C. What mass of oxygen would you need for this reaction?
<span>0.50 mol O2 (32 g / 1 mol ) = 16.00 g O2
</span>
D. How many grams of water would you produce?
<span>1.00 mol H2 ( 1 mol H2O / 1 mol H2 ) ( 18.02 g H2O / 1 mol H2O ) = 18.02 g H2O</span>
As common sense dictates, Mohs Scale is based on the fact that a harder material will scratch a softer one. By using a simple scratch test, you can determine the relative hardness of an unknown mineral.
Answer:
=745 Kelvin
Explanation:
- According to the pressure law the relationship between the pressure and absolute temperature of a gas at a constant volume is directly proportional.
- An increase in temperature causes a corresponding increase in pressure at a constant volume.
That is;
Mathematically;
When there are two varying conditions;
In this case;
P1 = 0.8 atm
T1 = 25+273 = 298 K
P2 =2.00 atm
T2= ?
Therefore;
Therefore, the temperature can be raised up to 745 kelvin without bursting vessel.
Answer: Refrigerator and fire extinguisher
Explanation: Refrigerator:An evaporator fan draws air from the refrigerator and blows it over the evaporator coils. The liquid refrigerant absorbs heat from the air and the air blows back into the refrigerator at a lower temperature, cooling the refrigerator. The liquid refrigerant starts to vaporize as it heats up and moves to the compressor.
Fire extinguisher:They work by smothering the fire: when you put a layer of powder or foam on the fire, you cut the fuel off from the oxygen around it, and the fire goes out. Carbon dioxide (CO2) extinguishers contain a mixture of liquid and gaseous carbon dioxide (a nonflammable gas).
Answer: option A. to decrease the solubility of the organic product in water
Explanation: sodium chloride solution act as a drying agent to remove water from an organic compound that is in solution. The salt water works to pull the water from the organic layer to the water layer,therby decreasing
