Answer:
Group 2
Explanation:
Because group 2 is very reactive and forms salts with other non metals. Example Calcium Chloride. Calcium is from group 2, forms ionic salts with other non metal, and exists as solid at standard temp and pressure.
Answer:
0.35 M
Explanation:
Molar mass of calcium chloride= 40+2(35.5)= 111gmol-1
Mass calcium chloride= 21.84g
Volume of solution= 562.43ml
From
n= CV
But n=m/M
n= number of moles
C=concentration
V= volume of solution in litres
m=mass of substance
M= molar mass of substance
n=21.84/111= 0.197moles
C= 0.197 ×1000/562.43
C= 0.35 M
Answer:
3120.75J
Explanation:
So, we have the formula 
. For this example, q is the heat energy in Joules, m is the mass in grams, c is the specific heat capacity in 
, and 
t is the change in temperature. In this case, m = 47.5g, c = 0.9 , and t = 94-21 = 73°C. Plugging in the values, we get the joules of heat required to raise 47.5g of Al from 21°C to 94°C which is stated above. You can double check my answer but that should be it. An important thing to be aware of are the units. Sometimes, the heat capacity may not be . I may be in Kelvin or something. Anyways, hope this helps.
Answer:
Answer is A: a uniform mixture that can’t be separated
Explanation:
