Answer:
Francium
Explanation:
The atomic radius increases from top to bottom in a group, and decreases from left to right across a period.
so francium (Fr) is the largest atom or has highest radii.
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Answer:
Mass of the substance, grams
86.8
Molar mass of the substance
18.0
Molar mass details
2.0160 H (2*1.008) + 15.9990 O (1*15.999)
Dominant genes are those that will overpower recessive genes. For example, if someone has a dominant "brown eye color" gene and a recessive "blue eye color" gene, this person will have brown eyes. The only way someone will have blue eyes is if they have two recessive genes, in which there is no dominant gene to overpower them.
Answer:
19.4 g of alum, will be its theoretical yield
Explanation:
The reaction is:
2 Al + 2 KOH + 4 H₂SO₄ + 22H₂O → 3H₂ + 2KAl(SO₄)₂•12H₂O
Let's determine the amount of acid.
M are the moles contained in 1 L of solution or it can be mmoles that are contained in 1 mL of solution
M = mmol /mL
M . mL = mmol
We replace: 8.3 mL . 9.9 M = 82.17 mmoles
We convert to moles: 82.17 mmol . 1 mol / 1000mmol = 0.082 moles
Ratio is 4:2
4 moles of sulfuric acid can make 2 moles of alum
By the way, 0.082 moles of acid may produce ( 0.082 . 2) /4 = 0.041085 moles.
We convert moles to mass:
Molar mass of alum is: 473.52 g/mol.
0.041085 moles . 473.52 g/mol = 19.4 g
Answer:
C3H8 + 5O2 === 3CO2 + 4H2O
Explanation:
The balancing of a chemical equation is simply based on Law of conservation of mass which states that mass can neither be created nor be destroyed but it only changes from one form to another during a chemical reaction. According to this law, the tottal number of atoms of each element on both sides of the equation must be same. By following this rule, we just have to make sure that the if there are three number of Carbon atoms on the left hand side ( Reactant side) then there must be same number of Carbon atoms on the right hand side which is called product side. The number of Hydrogen( H )atoms, Oxygen (O) atoms are balanced on the same principle.