Answer:
43 mole
Explanation:
Given data:
Number of atoms of Li = 2.6× 10²⁵ atoms
Number of moles = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
2.6× 10²⁵ atoms × 1 mole / 6.022 × 10²³ atoms
0.43 × 10² mole
43 mole
Polyethylene is a type of plastic.
The two dimensions of aluminum foil are given 13.72 cm and 8.63 cm respectively with mass 3.1 g.
The density of aluminum is 
. It is defined as mass per unit volume thus, volume of aluminum can be calculated as follows:
Putting the values.
The volume of cuboid is 
, the length and breadth are given, height can be calculated as follows;
Putting the values,
Or, approximately 9.7\times 10^{-3}cm
Therefore, thickness of aluminum foil is 
Answer:
Ca(ClO3)2
Explanation:
The chemical formula of calcium chlorate is Ca(ClO3)2, which means in this molecule, Ca2+ ion is bonded to two ClO3- ions. So the formula can be expended to O3Cl-Ca-ClO3, or CaCl2O6 (basically times the numbers of the elements inside the bracket by the number outside the bracket.
Answer:
The correct answers are "occur as Earth rotates through areas where ocean water bulges", "form due to the gravitational pull of the moon and Sun" and "occur on a predictable schedule".
Explanation:
Tides are defined as the rise and fall of the sea level that are formed due to the gravitational pull of the moon and Sun, however, the moon exerts a more stronger influence since it is much closer to the Earth. Tides occur as Earth rotates through areas where ocean water bulges, actually, Earth rotation makes an inertia effect that also contributes to tides force. Tides occur on a predictable schedule. For instance, it is known that coastal areas experience two low tides and two high tides every lunar day (24 hours and 50 minutes).
