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Mekhanik [1.2K]
3 years ago
13

Why do scientists use STP? options: A. STP has no negative numbers which makes calculations easier. B. Because temperature and p

ressure affect gases, scientists want to "standardize" the conditions at which gases are studied. C.Using 500 K and 500 kPa for standard temperature and pressure, conditions are kept constant. D. STP is used so that the Celsius temperature can be used in gas law calculations
Chemistry
1 answer:
alexdok [17]3 years ago
6 0

Answer: B

Explanation: It makes the most sense to me as the way temperature is measured, is with 0 degrees Celsius as the standard and 1 atm for pressure, if I am incorrect for any reason, please let me know

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Answer:

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24.0 mL of a 0.120 M Ca(OH)2 solution is required to titrate 160 mL of an HCl solution to its equivalence point. Find the moles
Alex787 [66]
T<span>he balanced reaction is as follows;
Ca(OH)</span>₂<span> + 2HCl ---> CaCl</span>₂<span> + 2H</span>₂<span>O
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number of moles of Ca(OH)</span>₂<span> reacted = 0.120 mol/L x 0.0240 L = 0.00288 mol according to molar ratio of 1:2 number of HCl moles reacted = twice the number of Ca(OH)</span>₂<span> moles reacted
number of HCl moles reacted = 0.00288 mol x 2 = 0.00576 mol
number of HCl moles in 160 mL - 0.00576 mol
therefore number of HCl moles in 1000 mL - 0.00576 mol / 160 mL x 1000 mL = 0.036 mol
molarity of HCl = 0.036 M</span>
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A. He sent a cathode ray between electrically charged metal plates

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The answer would be c <span>a jar of mixed nuts.</span>
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