Answer:
One tablet can neutralize 150 mL of stomach acid at a pH of 1.0
Explanation:
Step 1: Data given
Mass of calcium carbonate = 750 mg = 0.75 grams
Molar mass of CaCO3 = 100 g/mol
pH = 1.0
Step 2: The balanced equation
2HCl + CaCO3 → CaCl2 + H2CO3
Step 3: Calculate molarity of HCl
pH = -log[H+] = 1
[H+] = 0.1 M = 0.10 mol/L
Step 4: Calculate moles of CaCO3
Moles CaCO3 = 0.75 grams / 100g/mol
Moles CaCO3 = 0.0075 mol
Step 5: Calculate moles of HCl
For 2 moles HCl we need 1 mol CaCO3 to produce CaCl2 and 1 mole of H2CO3
For 0.0075 moles of CaCO3 we have 2*0.0075 = 0.015 moles HCl
Step 6: Calculate volume of HCl
Volume = moles /molarity
Volume = 0.015 moles / 0.1 M
Volume = 0.15 L = 150 mL
One tablet can neutralize 150 mL of stomach acid at a pH of 1.0.
Answer:
197 + (35.5×3) = 303.5
Explanation:
relative formula mass is the sum of the relative atomic masses of the atoms in the formula ( AuCl3 )
True, different reactions require different catalysts. Hence, option 1 is correct.
<h3>What are catalysts?</h3>
A catalyst is a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.
Though a catalyst is supposed to remain unaltered at the end of the reaction, it does take part in the reaction by providing active centres for the reaction to take place.
By helping to form a suitable activated complex in the course of the reaction, the catalyst increases the rate of formation of the product, as well as its yield.
Therefore, a catalyst has to be reactant-specific to form the favourable activated complex or intermediate.
Hence, option 1 is correct.
Learn more about the catalysts here:
brainly.com/question/12260131
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Answer:
the first one I believe is right but I could be wrong.
Explanation:
can you make your question understandable?
I'll try to solve it
