Answer : The nutritional Calories per gram of the candy are, 5.36 calories
Explanation :
First we have to calculate the amount of heat.
where,
q = heat = ?
c = specific heat = 
= change in temperature = 
Now put all the given values in the above formula, we get:
Now we have to calculate the heat for per gram of sample.
Heat = 
Now we have to calculate the heat in terms of calories.
As, 1 nutritional Calories = 1000 calories
and, 1 calories = 4.2 J
As, 4.2 J = 1 calories
So, 22510 J = 
Therefore, the nutritional Calories per gram of the candy are, 5.36 calories
<u>Answer</u>:-
When the reaction takes place Ca is reduced or is an oxidizing agent.
Reaction:
Ca + 2Cl =CaCl2
Note: There is a +2 charge on Ca(Calcium) and -1 charge on each Cl-atom(Chlorine atom) hence the charges are cancelled. Therefore, the total charge on the whole compound is zero.
Explanation:-
• Reduction: gain of electron/electrons
gain of hydrogen
loss of oxygen
Oxidation: gain of oxygen
loss of hydrogen
loss of electron/electrons.
• Oxidizing agent/reduced
Reducing agent/oxidized
• The molecule that is oxidized loses an electron and the molecule that is reduced gains the electron that was lost by the oxidized molecule.
<span>Answer:
3 electron pairs
Let's take BF3 for an example.
When you find the valence electrons for this molecule --> [3+(3x6)], you'll get 24e-. You draw the Lewis dot structure and each of the F atom would have six dots around it (a total of 18 because there's 3 F atoms) and the B would have three lines [one line attached to each F. One line would equal to 2 valence electrons] and you get a total of 24 valence e-.
The question asks how many groups are on the CENTRAL atom, meaning on the B. It would be three</span>
Mass = 90.0 g
Density = 0.70 g/mL
Volume = in mL ?
D = m / V
0.70 = 90.0 / V
V = 90.0 / 0.70
V = 128.57 mL
