From the chemical formula, 1 formula unit of KAl (SO4)2.12H2O
encompasses 1 atom of Al = 4 * 2 atoms of O in KAl (SO4)2 + 12 atoms of O in
12H2O which is equal to 20 atoms of O.
So, if you have 1.3 × 10^21 Al atoms, you have 20 * 1.3 × 10^21 O atoms will
now be equal to 2.6 * 10^22 atoms of O.
Answer:
The Earth's interior exhibits a change in trend in the "outer core."
Explanation:
<u>The 4 Main Layers of the Earth</u>
<em>1. Crust - </em>This is the outermost layer of the Earth. It consists of igneous, metamorphic and sedimentary rocks. This makes the crust rock solid.
<em>2. Mantle - </em>The mantle is formed by silicate rocks. It is located between the crust and the outer core. It consists of the upper mantle and the lower mantle. The upper mantle lies between the crust and the lower mantle while the lower mantle lies between the upper mantle and outer core.
<em>3. </em><em>Outer Core- </em>This is the only liquid layer of the earth. It is mostly made of iron and nickel. This causes a change in trend among all the other parts of the Earth which are solid.
<em>4. Inner Core- </em>This is the innermost part of the Earth. The temperature here is hotter than the sun. The solid inner core is said to be growing at the expense of the outer core. This also has the highest density of all.
Answer:
Molecular formula is C₂₆H₃₆O₄
Explanation:
The compound is 75.69 % C, 8.80 % H and 15.51 % O. This data means, that in 100 g of compound we have 75.69 g, 15.51 g and 8.80 g of, C, O and H, respectively. We know the molar mass of the compound, so we can work to solve the moles of each element.
In 100 g of compound we have 75.69 g C, 15.51 g O and 8.80 g H
In 412 g of compound we would have:
(412 . 75.69) / 100 = 311.8 of C
(412 . 15.51) / 100 = 63.9 g of O
(412 . 8.80) / 100 = 36.2 g of H
Now, we can determine the moles of each, that are contained in 1 mol of compound.
312 g / 12 g/mol 26 C
64 g / 16 g/mol = 4 O
36 g / 1 g/mol = 36 H
Molecular formula is C₂₆H₃₆O₄
