Answer:
1/4 or 25%
Explanation:
The Arctic region of the earth refers to that part of the earth around the north pole region. Hence, when we are talking about latitude O degrees North, the areas around this geographical location is referred to as the arctic.
Now , there is an estimated 1/4 or 25% of the world’s oil and natural gas here. Unfortunately, these are yet accessible because of the amount of ice or snow covering. With increase in technological advancements, this might be accessible in the nearest future
<span>1. Balance the reaction
Cu + 2AgNO3 → Cu(NO3)2 + 2Ag
2. Find the limiting [divide moles of reactant by their balancing numbers]
Cu: 4.2/1 =4.2
AgNO3: 6.3/2= 3.15
AGNO3 is the limiting
How many moles of silver metal will be formed?
The ratio between the limiting reactant and silver is 2:2 or 1:1
therefore 6.3 moles of silver will be formed.
How many moles of excess reactant will be left?
Since each mole of copper is equal to 2 moles of AgNO3. divide 6.3 by 2 then minus it from coppers moles
6.3/2 = 3.15
4.2-3.15 = 1.05 moles of copper will be left
</span>
Mendeleev's investigations suggested previous versions did not work for all known elements : <span>best explains why Mendeleev's periodic table became the first widely accepted organized scheme for the elements.</span>
Answer:
34,690 g O₂ used.
Explanation:
Balance Equation
12B₂H + 21O₂ => 12B₂O₃ + 6H₂O
Given 14,000g B₂H moles O₂ consumed to burn 619.47 mol B₂H
=(14,000g/22.6g/mol) = 21/12 x 619.47 mole O₂ = 1084 mole O₂
= 619.47 mol B₂H used 1084 mol O₂ x 32 g/mol = 34,690 g O₂ used.
