3.84 Kg of sodium chloride is needed to lower the freezing point of the water so that ice melts.
Explanation:
Data given:
mass of ice = 30 Kg
molar mass of NaCl = 58.5 grams/mole
ΔT(depression in freezing point) = 15.4 F or - 9.22 degrees
Kf = 1.86 degree C/ mole
Molality = ?
mass of NaCl =?
i = 2 (because NaCl breaks into 2 ions)
ΔT = iKfm equation 1
Depression in freezing point when ice melts, the temperature is 0 degrees so
the depression in temperature = 9.22 degrees
putting the values in the equation:
9.22 = 2 x 1.86 x 
x
mass = 3.84 kg of NaCl will be required to lower the freezing point of the water so that the ice melts.
i think it's <em>C, biosphere</em>
Answer:
1) Pentane 2) 2-Pentene
Explanation:
Both molecules have five carbons so you will add thhe prefix "pent-" and the first molecule only has single bonds so it will end in "-ane" because is it an Alkane. The second hydrocarbon has a double bond; therefore, it's a Alkene resulting in the ending of "-ene". BUT the double bond is located on the second carbon; therefore you must add "2-" before the name.
Answer:
0.333 L CO2
Explanation:
Hello,
I'm attaching the picture with the mathematical procedure for this exercise.
Don't forget to consider that the HCl is in excess because the resulting solution's weight is pretty much similar to the HCl's mass (40 mL*1.14 g/mL=45.6g), so we can say that it is by far in excess, thus, the resulting CO2 is computed based in the initial amount of calcium carbonate as is shown in the picture. One could say that the reaction is likely to be:
For us to know the stoichiometric relationship.
Best regards.
