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Anna11 [10]
3 years ago
5

It has more protons than Cl but less than K

Chemistry
1 answer:
timama [110]3 years ago
8 0

Answer: Argon (Ar), which has 18 protons.

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How much heat does it take to raise 100g of aluminum (c= .9 J/gC) from 12.5C to 31C?
zlopas [31]

Answer:

When two substances having different temperatures are introduced or kept together, heat energy, Q, flows from a substance at higher temperature to a substance at lower temperature. Also, heat continues to be transferred until their temperatures are equalized, at which point the substances are in thermal equilibrium. In a closed system, the amount of energy lost is equal to but opposite the amount of energy gained.

Explanation:

5 0
3 years ago
How many grams of Cl are in 38.0 g of each sample of chlorofluorocarbons (CFCs)?
natulia [17]
<span>If there are 38 g of CFC, then there will be 120.9135 g of CFCl2 per mol. You will multiply this times the number of moles of Cl (2) for every mole of CFCl2, and then by the number of grams of Cl per mole, which is 35.4532: (38.0 g CF2Cl2) / (120.9135 g CF2Cl2/mol) x (2 mol Cl / 1 mol CF2Cl2) x (35.4532 g Cl/mol) = 22.3 g Cl in CF2Cl2 Next, if there are 38 g of CFC, there will be 137.3861 g of CFCl3 per mole. You will multiply this times the number of moles of Cl (3 this time) for every mole of CFCl3. You will then multiply this by 35.4532 again: (38.0 g CFCl3) / (137.3681 g CFCl3/mol) x (3 mol Cl / 1 mol CFCl3) x (35.4532 g Cl/mol) = 29.4 g Cl in CFCl3 Continue following these steps until you are able to multiply 1 mole of Cl per 1 mol CF3Cl by 35.4532: (38.0 g C2F3Cl3) / (187.3756 g C2F3Cl3/mol) x (3 mol Cl / 1 mol C2F3Cl3) x (35.4532 g Cl/mol) = 21.6 g Cl in C2F3Cl3 (38.0 g CF3Cl) / (104.4589 g CF3Cl/mol) x (1 mol Cl / 1 mol CF3Cl) x (35.4532 g Cl/mol) = 12.9 g Cl in CF3Cl</span>
5 0
3 years ago
5. Identifying the limiting reagent: Given the reaction 2Cu + S → Cu2S, if you had 3 moles of both Cu and S, which would you run
Lady_Fox [76]

The reaction is

2Cu + S → Cu2S

So as per balanced given reaction we need one mole of sulphur over two moles of copper

Or

To react with one mole of sulphur we need two moles of copper

Thus we can say that the mole ration required for complete reaction will be

Cu : S = 2 : 1

As per the given problem the moles of each Cu and S are 3 moles

Thus for each three moles of given sulphur we need six moles of Cu to give three moles of Cu2S

However we have only three moles of copper available

So the limiting reagent is copper

It is going to decide the actual yield of reaction

The three moles of Copper will get completely utilized and only 1.5 moles of S will be used in the reaction making S an excess reagent

The moles of S left will be = 1.5 moles

moles of Cu2S formed = 1.5 moles


8 0
3 years ago
What is a low pressure system?
KonstantinChe [14]

A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.

<u>Explanation</u>:

  • Wind flow towards the low pressure and the air rises in the atmosphere. As the air increases, the water vapor within it solidifies, forming clouds and undergo precipitation. Low pressure formed in the center areas.
  • The atmospheric circulations of air up and down in a low-pressure area remove a small amount of atmosphere. This usually happens between warm and cold air masses by flowing air which tries to reduce the contrast of temperature.          
5 0
3 years ago
Explain why argon is used in tungsten filament lamps​
PSYCHO15rus [73]

Answer:

Because it helps the filament from decaying

5 0
3 years ago
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