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baherus [9]
3 years ago
14

Four people weigh a standard mass of 10.00g on the same balance. Which of the following sets of readings suggests measurements t

hat are neither precise nor accurate
Chemistry
1 answer:
Svetach [21]3 years ago
5 0
An example of accurate but not precise would be 3 people weigh a 10g sample. the weights are 0g, 10g, & 20 grams. the scale is way off but the weights average to the right thing.
precise but not accurate would weighing a 10g sample 3 times and getting 5.5, 5.4, & 5.5. they'e all incredibly similar therefore precise but its nowhere near 10, so not accurate. 
neither precise nor accurate would be 3 weights being 10, 20, &30. It averages wrong and is imprecise.
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ii. Use the solubility table to label the state symbols of each compound in the reaction. (1 point) AgNO3 + KCL = AgCl + KNO3
rjkz [21]

Answer:

  • AgNO₃ (aq) + KCl (aq) → AgCl (s) + KNO₃ (aq)

Explanation:

In a <em>solubility table</em> you find:

  • AgNO₃ (silver nitrate) is highly soluble
  • KCl (potassium chloride) is soluble
  • AgCl (silver chloride) is insoluble
  • KNO₃ (potassium nitrate) is soluble

In a chemical equation the states of soluble compounds is identified as aqeous, using the letter "aq" in parenthesis, and the state of insoluble compounds is identified as solid, using "s" in parenthesis.

Then, the reaction showing the states of the reactants and products is:

  • AgNO₃ (aq) + KCl (aq) → AgCl (s) + KNO₃ (aq)
4 0
3 years ago
balance by oxidation number method&lt;br /&gt;KMnO4 + Na2O₂ + H2 so4 ko2so4 +&lt;br /&gt;Mosou4 + Na2so&lt;br /&gt;4 + O2 + H₂O​
Katarina [22]

Answer:

8H2SO4 + 2KMnO4 + 5Na2O2 => 8H2O + 2MnSO4 + 5Na2SO4 + 5O2 + K2SO4

have:

Explanation:

6 0
3 years ago
what information do the reduction potentials of two elements give a redox reaction between those elements?
RSB [31]

Answer:

為什麼你認為

加利利的月亮是第一個

物件要發現與

望遠鏡

Explanation:

私 伝える私あなたが

5 0
3 years ago
What initial observation led to the Alvarez asteroid-impact theory? a large undersea crater off the coast of the Yucatan Peninsu
Nikitich [7]

Answer: high iridium levels in a 66- million-year-old clay layer in Denmark and Italy

Explanation:

6 0
3 years ago
Read 2 more answers
How many grams of MgCl2 (molar mass = 95.20 g/mol) will be formed from 25.6 mL of a 0.100 M HCL solution reacting with excess ma
lorasvet [3.4K]
The balanced equation for the above reaction is as follows;
Mg + 2HCl ---> MgCl₂ + H₂
stoichiometry of HCl to MgCl₂ is 2:1
we have been told that Mg is in excess therefore HCl is the limiting reactant 
number of HCl moles reacted - 0.100 mol/L x 0.0256 L = 0.00256 mol
according to molar ratio, number of MgCl₂ moles formed - 0.00256/2 
Therefore number of MgCl₂ moles formed - 0.00128 mol
mass of MgCl formed - 0.00128 mol x 95.20 g/mol = 0.122 g
3 0
3 years ago
Read 2 more answers
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