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Naily [24]
2 years ago
13

3. Which of the following sentences apply to neutrons? a. have a negative charge. b. circle around the atom nucleus. c. are the

only particles that form the nucleus. d. have a mass of 1 amu. SA 2​
Chemistry
1 answer:
DerKrebs [107]2 years ago
3 0

Answer:

d.have a mass of 1 amu..

Explanation:

Does not match a as the answer for a is electrons B.electron circle around the nucleus because neutrons are inside the nucleus.C.proton and neutrons make the nucleus so the only answer left is .d .which is correct

You might be interested in
The solid dissolves quickly is a chemical or physical reaction
Vladimir79 [104]

Answer:

i think it is chemical wait no physical

Explanation:

4 0
3 years ago
Aluminum–lithium (Al–Li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of
brilliants [131]

Answer:

6.54% is the required concentration of lithium in an alloy (Al–Li).

Explanation:

Suppose 100 grams of an alloy of aluminium and lithium.

Density of an alloy = d  2.14 g/cm^3

Volume of an alloy = V

V=\frac{100 g}{2.14 g/cm^3}=46.73 cm^3

Volume of aluminum = v_1

Mass of aluminum = x

Density of aluminum = d_1=2.71 g/cm^3

v_1=\frac{x}{d_1}

Volume of lithium = v_2

Mass of lithium = y

Density of lithium= d_2=0.534 g/cm^3

v_2=\frac{y}{d_2}

x+y=100 ..[1]

v_1+v_2=V

\frac{x}{d_1}+\frac{y}{d_2}=46.73 cm^3

\frac{x}{2.71}+\frac{y}{0.534}=46.73..[2]

Solving [1] and [2] :

we get :

x = 93.46 g

y = 6.54 g

Concentration of Li (in wt%) that is required:

Li\%=\frac{6.54 g}{100 g}\times 100=6.54\%

5 0
3 years ago
Answer please and thank you
Alex73 [517]

Answer:

Option B. 30 KJ.

Explanation:

The following data were obtained from the question:

Temperature (T) = 5000 K

Enthalpy change (ΔH) = – 220 kJ/mol

Change in entropy (ΔS) = – 0.05 KJ/mol•K

Gibbs free energy (ΔG) =...?

The Gibbs free energy, ΔG can be obtained by using the following equation as illustrated below:

ΔG = ΔH – TΔS

ΔG = – 220 – (5000 x – 0.05)

ΔG = – 220 – (– 250)

ΔG = – 220 + 250

ΔG = 30 KJ

Therefore, the Gibbs free energy, ΔG is 30 KJ.

3 0
3 years ago
Which of the following best describes solids?
Angelina_Jolie [31]
In my opinion I would pick D. 

Multiple answers could be chosen, just due to the fact that a solid is nothing more than just an object that cannot change it's physical shape into an object; just as water would. a solid can have a low density; such as paper, plastics, or even just a piece of wood. 

But think of a block of ice. You can break it, and crush it. It cannot be formed into any other shape. If you did break it, it only would make more ice fragments. And it's next phase is a liquid; if it were to be melted.
3 0
3 years ago
Read 2 more answers
Is burning sugar a chemical or physical change? Please provide explanation
solong [7]

Answer:

It is a chemical change

Explanation:

the reason is because the will not be able to materialize back into it's original form.

6 0
3 years ago
Read 2 more answers
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