Answer:
B. hot to cold
Explanation:
Energy wants to reach thermal equilibrium (which is basically just balanced temperature) so it will move from hot to cold to make the cold object warmer and the hot object cooler.
Answer:
(C). Mg(s) | Mg2+(aq) Au+(aq) | Au(s)
<u>Answer:</u> The value of a is 2.955 and value of b is 8.
<u>Explanation:</u>
Scientific notation is defined as the notation in which a number is expressed in the decimal form. This means that the number is always written in the power of 10 form. The numerical digit lies between 0.1.... to 9.9.....
If the decimal is shifting to right side, the power of 10 is negative and if the decimal is shifting to left side, the power of 10 is positive.
We are given:
Speed of light in vacuum = 299,500,000 m/s
Converting this into scientific notation, we get:
As, the decimal point is shifting to left side, thus the power of 10 is positive.
Comparing the calculated value to the given number, which is:
Number =
Hence, the value of a is 2.955 and value of b is 8.
Answer:
CaBr2 and CaCl2 solubility increases with increase in pH while the solubility of Ca(OH)2 and MgCl2 increases with decrease in pH.
Explanation:
Yes, solubility of compounds change with ph. The solubility of CaBr2 increases with the increase occurs in pH. The solubility of CaCl2 also increases with the increase in pH of a solution. On the other hand, the higher pH, decreases the solubility of Ca(OH)2 while with low pH, Ca(OH)2 solubility increases. MgCl2 solubility also increases with the decrease occurs in pH. There are different solubilities for different compounds , some compounds having highest solubility in acidic and some in basic.