The Eukaryotic cell has a nucleus
Sr is the limiting reactant.
Given the reaction equation;
2Sr + O2 (g) → 2SrO
2 moles of Sr reacts with 1 mole of O2
2 moles Sr will react with x mole of O2
x = 2 ×1/2
x = 1 mole of O2
Since we have more O2 than required, it is the reactant in excess, hence Sr is the limiting reactant.
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Explanation:
An equation that consists of same number of atoms on both reactant and product side is known as a balanced chemical equation.
For example, 
Number of atoms on reactant side are as follows.
C = 7
H = 6
O = 3
Number of atoms on product side are as follows.
C = 1
H = 2
O = 3
Therefore, to balance this chemical equation we multiply 
by 8 on reactant side. Whereas we multiply 
by 7 and 
by 3 on product side.
Therefore, the balanced chemical equation will be as follows.
The reaction CFCl3 + UV Light -> CFCl2 + Cl does not need another reactant as with CFCl3 because the reaction itself is reactive to light. Note that there are reactions that are sensitive to light to form products and when this type of reaction are not exposed to light, no reaction occurs.
Answer:
When swallowed, the signs and symptoms may include:
Severe burning and associated pain in the mouth, throat, and food-pipe
Drooling from the mouth
Loss of vision; unable to speak
Inflammation of the throat may cause respiratory difficulties
Sudden reduction in blood pressure (hypotension)
Vomiting blood
On skin contact, the signs and symptoms may include:
Severe skin and tissue burns associated with pain
Severe eye burns associated with pain; loss of vision
When inhaled, the signs and symptoms may include:
Coughing (including coughing-up blood), choking
Heaviness in the chest; chest pain
Bluish discoloration of lips and beneath fingernails
Respiratory difficulties
Reduced blood pressure (hypotension)
Headache and weakness
Increased heart-rate
Collapse
Explanation:
