Answer:
The answer is
<h2>2.7 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula

From the question
mass of aluminum = 40.5 g
volume = 15 mL
Substitute the values into the above formula and solve for the density
We have

We have the final answer as
<h3>2.7 g/mL</h3>
Hope this helps you
(A) Na2CO3
(B) NaHCO3
(C) H2CO3
(D) HF
(E) SO3
(F) CuSO4
(G) H2SO4
(H) H2S
- Remember to place the subscripts correctly. Hope I helped.
The ratio which denotes the relation between the two different units is said to conversion factors.
According to conversion factors, the relation between calorie and kilojoule is given as, one Calorie is equal to 4.184 kJ.
1 Cal = 4.184 kJ
Now, according to above relation, convert 300 calories into kilojoules.
300 calories =
= 

Thus, kilojoules present in soda is equal to 
Alloys are mixtures of metals and other elements, which still keeps many characteristics of metal.
Alloys are sometimes desirable as they have some properties that the original metals don't, for example more flexibility or less fragility. Steel is such an alloy: it prevents movement of iron parts, making it stronger.