Answer:
Rock
Explanation:
A rock is a solid mixture of one or more minerals and organic matter. Rock is often defined as an aggregate of minerals.
Minerals are solids that are made up of inorganic materials with a definite composition and a well ordered arrangement.
- Rocks are usually classified based on their mode of formation.
- They are often grouped as igneous, metamorphic and sedimentary.
Answer:
D) 4.97M
Explanation:
firstly we will calculate the molar mass of K2HPO4.
K=39, H=1 , P=31, O=16
K2HPO4 = (39*2)+(1)+(31)+(16*4) =174g/mol
number of moles = mass / molar mass
mass of K2HPO4 =238g
number of moles = 
moles.
moles is contained in 275mL of solution.
The molarity of a solution is the number of moles of solute contained in 1000mL of solution.
if moles is contained i 275mL of solution
Then X will be contained in 1000 mL of solution
x=4.9739moles
x ≈ 4.97moles
4.97moles is contained in 1000mL of solution.
The molarity of the solution is 4.97M
<span>SO3
for the formal charges, we have:
for the single-bonded oxygens F.C. = 6 - [1/2(2) + 6] = -1
for the double-bonded oxygen F.C. = 6 - [1/2(4) + 4] = 0
for the sulfur F.C. = 6 - [1/2(8) + 0] = 2
Again, the formal charges add to zero. The oxidation numbers of O and S are -2 and +6, respectively. Note the three resonance forms!</span>
