Answer:
C
Explanation:
A negative deltaH means that the reaction has to give up heat in order to happen. You have to treat deltaH as a reactant. So the question is do you need to add heat to the reactants to make the products. If you do, deltaH is plus.
Heat is required to make a solid go to a gas. deltaH is plus. A is not the answer.
A lot of heat is required for B (something like 400 Kj / mole. Like A, deltaH is plus and B is not the answer.
C: The liquid has to give up heat in order for the this reaction to take place. C is the answer.
D requires heat. It is not the answer.
Answer : Option D) The pH of the solution is 8.0.
Explanation : pOH of a solution is a measure of hydroxide ion 
concentration in a particular solution. It gives the measure of alkalinity of a solution. Normally, aqueous solutions at 25°C have pOH which is less than 7 are usually alkaline, when pOH is found to be greater than 7 then they are acidic and when pOH will be equal to 7 then it is neutral.
pH + pOH = 14, this relationship is used to find pH of any unknown solution with given pOH value,
Here, we known pOH is 6.0, so we get,
pH = 14 - 6 = 8.0;
Hence, the pH will be 8.0.
Answer:
D. two-stroke cylinder engine.
Explanation:
<u>Two-stroke cylinder engine:</u> In chemistry, the term "two-stroke cylinder engine" is described as one of the types of "internal combustion engine" that tends to complete a single "power cycle" possessing two different strokes of the "piston" during a particular "crankshaft revolution".
<u>It generally</u> consists of two different strokes that are being often known as power or exhaust and suction stroke.
<u>In the question above, the given statement signifies the "two-stroke cylinder engine". </u>
Answer:
n = 3
l = 1
ml = +1
ms = +1/2
Es paramagnético
Explanation:
Siguiendo las reglas de llenado de orbitales, los 17 electrones del cloro se llenan así:
1S = <u>⇅</u>
2S = <u>⇅</u>
2P = <u>⇅</u> <u>⇅</u> <u>⇅</u>
3S = <u>⇅</u>
3P = <u>⇅</u> <u>⇅</u> <u>↑</u>
<u />
El número cuántico principal n, es el nivel energético donde se encuentra este electrón:
n = 3 (Porque está en el orbital 3P
El número cuántico secundario, l, para el orbital 3P es = 1:
l = 1
El número cuántico magnético, ml, es determinado por la posición del electrón. Como está en el tercer orbital 3P:
ml = +1
Y el número cuántico de spin, ms (↑ = +1/2; ↓ = -1/2)=
ms = +1/2
Dado que el último electrón se encuentra desapareado, el cloro es paramagnético dado que el espín de el último electrón no tiene su electrón complementario haciendo que este compuesto pueda interactuar con un campo magnético.
<h3>Answer:
234 90Th → 0 -1e + 234 91Pa Explanation:
Given that :
Thorium 234 decays by beta emission Beta emission = 0, - 1 e
234 90Th → 0 -1e + 234 91Pa Hence, when Thorium 234 90 undergoes a beta Decay ; mass number remains the same at 234 while atomic number increases by 1, becoming (90 + 1) = 91 to form a protactinium nuclide.
</h3>
