Answer:
H2 molecules are reactants and H2O molecules are products.
Explanation:
The molecules that react to form a compound or any product is called reactants and the thing we get after the chemical reaction is product. Another definition is that the molecules or compounds that are present on the left side of the chemical equation is reactants and the molecules or compounds on the right side are products.
Answer:
Ionically, because they are ionic compounds
Answer: c. Broiling a steak on a grill
Explanation:
A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.
Example: Boiling water which involves phase change from liquid to gas.
Melting of wax which involves phase change from solid to liquid.
Condensing water vapor into rainfall which involves phase change from gas to liquid.
Carving a piece of wood which involves a change in shape.
A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.
Example: Broiling a steak on a grill which involves combustion and a change in chemical composition.
Answer:
7.92 mL
Explanation:
There is some info missing. I think this is the original question.
<em>A chemistry student weighs out 0.0617g of acetic acid (HCH₃CO₂) into a 250.mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1300 M NaOH solution.
</em>
<em>
Calculate the volume of solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.</em>
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First, we will calculate the moles of acetic acid (MW 60.05 g/mol).
0.0617 g × (1 mol/60.05 g) = 1.03 × 10⁻³ mol
Let's consider the neutralization reaction between HCH₃CO₂ and NaOH.
HCH₃CO₂ + NaOH ⇄ NaCH₃CO₂ + H₂O
The molar ratio of HCH₃CO₂ to NaOH is 1:1. The moles of NaOH are 1.03 × 10⁻³ moles.
The volume of 0.1300 M NaOH that contains 1.03 × 10⁻³ mol is:
1.03 × 10⁻³ mol × 1000 mL/0.1300 mol = 7.92 mL
It is 62.5g N2--------------
