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yawa3891 [41]
3 years ago
11

Describe how a measuring cylinder can be used to measure the volume of gas produced

Chemistry
1 answer:
Kamila [148]3 years ago
3 0
Cylinder are used to measure those things so yes correct I can’t write it all sorry
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an unknown sample required 21.05 mL of 0.02047 M KmnO4 to reach the end point. How many moles of KmnO4 reacted?
Angelina_Jolie [31]
.02047 = x / 0.02105 = 0.0004309mol
6 0
3 years ago
Hey guys pls answer this question
balandron [24]

Answer:3. B 4. C

Explanation:

7 0
3 years ago
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What is the mass number of an atom/ion with 32 electrons, 32 protons, and 31<br> neutrons?
bekas [8.4K]

Answer:

63

Explanation:

Relative mass = number of Protons + number of Neutrons

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6 0
4 years ago
What variable did the researchers intentionally vary in the experiment, and what are the units for this variable? what variable
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4 0
3 years ago
A 100.0 ml sample of 0.18 m hclo4 is titrated with 0.27 m lioh. determine the ph of the solution after the addition of 30.0 ml o
gizmo_the_mogwai [7]
From the molarity and volume of HClO4, we can determine how many moles of H+ we initially have: 
     0.18 M HClO4 * 0.100 L HClO4 = 0.018 moles H+

We can determine how many moles of OH- we have from the molarity and volume of LiOH:
     0.27 M LiOH * 0.030 L LiOH = 0.0081 moles OH-

When the HClO4 and LiOH neutralize each other, the remaining will be
     0.018 moles H+ - 0.0081 moles OH- = 0.0099 moles of excess H+

This means that the molarity [H+] will be
     [H+] = 0.0099 moles H+ / (0.100 L + 0.030 L) = 0.07615 M

The pH of the solution will therefore be
     pH = -log [H+] = -log 0.07615 = 1.12
6 0
4 years ago
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