Answer:
48.049 kJ or 48049 J
Explanation:
Hello again.
So we know the formula 
. c is the heat capacity but this time, it is not given. However, water has a very well known heat capacity which is 4.184 J/(g°C). This is in fact the number we refer to a calorie which is the amount of energy you burn that can raise the temperature of 1g of water by 1°C. So, plugging in values, you get the above. But double check if I am wrong.
Answer:
D. 0.160
Explanation:
The solution A is obtained adding 2.0mL of a solution of bromocresol green, 5.0mL of 1.60M HAc and 2.0mL of a solution of KCl. The solution is diluted to 50mL
That means the HAc is diluted from 5.0mL to 50.0mL, that is:
50.0mL / 5.0mL = 10 times.
And the final concentration of HAc must be:
1.60M / 10 times =
0.160M
Right answer is:
<h3>D. 0.160</h3>
Answer:
Explanation:
A Brönsted-Lowry acid is defined as any substance that has the ability to lose, or "donate a proton" [H +].
A Brönsted-Lowry base is a substance capable of gaining or "accepting a proton" [H +].
Then a proton transfer occurs, which requires the presence of a proton donor, that is, an acid and a base that accepts them.
This theory has the disadvantage of leaving out several substances that are acidic and that do not have protons.
Thiocyanic acid is a chemical compound that can be considered, but not a Bronsted Lowry base, giving up the proton and generating the anion [SCN] -
Answer:
c. Polystyrene
Explanation:
Caleb wants a synthetic material that is not soluble in water, so it must be a nonpolar material because water is polar.
Cellulose is a nonpolar molecular, but is a natural product;
Nylon is a synthetic compound, but is polar, so it' soluble in water;
Vulcanized rubber is polar and the rubber is a natural compound.
The only compound that he can use is polystyrene, which is insoluble in water and is a synthetic material.
