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3 years ago

Given the following table, which statement is true about atoms A and B?

Chemistry

1 answer:

lisabon 2012 [21]3 years ago

6 0

Answer:

The statement true is A. A and B are isotopes of the same element.

Explanation:

Isotopes correspond to atoms of the same element with different mass numbers (A), that is to say they differ in the amount of neutrons in the nucleus. In the case of compound A it has 10 neutrons, and B has 11.

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Convert 10erg into joule

Luden [163]

Answer:

0.000001 joule

Explanation:

brainlest?

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3 years ago

Whether a material is magnetic or not depends on what

Inessa05 [86]

It depends on what the material is.

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3 years ago

The combustion of 44.45 grams of a hydrocarbon gas mixture releases 2,649 kJ of heat. How much energy, in kWh, will the combusti

Naddika [18.5K]

Explanation:

It is given that 44.45 g of hydrocarbon gas produces 2649 kJ or $2649 \times 10^{3} J$ of heat.

Also here, 1 lb = 453.592 g.

Therefore, amount of energy released by 453.592 g of hydrocarbon gas will be calculated as follows.

$\frac{2649 \times 10^{3} J \times 453.592 g}{44.45 g}$

= $27.03 \times 10^{6} J$

It is known that 1 J = $2.778 \times 10^{-7} Kwh$ .

Hence, $27.03 \times 10^{6} J$ = $27.03 \times 10^{6} J \times 2.778 \times 10^{-7} Kwh/J$

= 7.508 Kwh

Thus, we can conclude that the combustion of exactly one pound of this hydrocarbon gas produce 7.508 Kwh energy.

3 0

3 years ago

When determining the mass of product used or reactant consumed, the number of moles must be determined before comparing two subs

FromTheMoon [43]

Answer:

moles react.

Explanation:

In a chemical reaction equation, we know that chemical species react in moles. It is actually the moles of the individual chemical species that participate in a chemical reaction and not the masses of those species.

In solving stoichiometric problems, it is mandatory to use moles as a conversion factor in calculating the mass of product formed or the mass of reactant consumed. We often read off the number of moles that reacted from the balanced reaction equation and then convert the reacting mass of species given to the number of moles of that specie that actually participated in the reaction in order to obtain any required information from a reaction.

7 0

4 years ago

Read 2 more answers

Predict the spontaneity of a reaction (and the temperature dependence of the spontaneity) for each possible combination of signs

Akimi4 [234]

Answer and Explanation:

At constant pressure and constant temperature, the Gibbs free energy of a process is given by the following equation:

ΔG= ΔH - T ΔS

The process is spontaneous when ΔG<0. For this, there are four alternatives depending on the signs of ΔH and ΔS and the temperature (T):

1) ΔH negative, ΔS positive ⇒ b)The reaction will be spontaneous at all temperatures.

ΔG= (-H) - T (+S) ⇒ ΔG<0 always

2) ΔH positive, ΔS negative ⇒ c)The reaction will be nonspontaneous at all temperatures.

ΔG= (+H) - T (-S) ⇒ ΔG>0 always

3) ΔH negative, ΔS negative ⇒ d)The reaction will be spontaneous at low temperature, but nonspontaneous at high temperature.

ΔG= (-H) - T (-S) ⇒ ΔG<0 if TΔS is lower than ΔH, because is the positive term

4)ΔH positive, ΔS positive ⇒ a)The reaction will be nonspontaneous at low temperature, but spontaneous at high temperature.

ΔG= (+H) - T (+S) ⇒ ΔG<0 if TΔS higher than ΔH because is the negative term

8 0

3 years ago