Answer:
zero gram present after the reaction is completed
201 grams.
<h3>Explanation</h3>
What's the formula of Silver Sulfide?
Consider the two kinds of ions in silver sulfide:
- Silver ions , and
- Sulfide ions .
The charge on the two types of ions should balance. The charge on each sulfide ion is twice as much as that on a silver ion. There needs to be <em>two</em> silver ions for each sulfide ion.
Hence the formula: .
How many <em>moles </em>of formula units in 174 grams of Ag₂S.
Relative atomic mass from a modern periodic table:
- Silver Ag: 107.868;
- Sulfur S: 32.06;
- Chlorine Cl: 35.45.
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How many <em>moles</em> of AgCl formula units will be formed from 174 grams of Ag₂S?
The question doesn't mention the other product in this reaction. Finding that product isn't a must as long as all Ag from Ag₂S end up in AgCl.
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We are trying to answer the question: how many moles of AgCl does <em>each</em> mole formula unit of Ag₂S produce. Thus, assign a coefficient of <em>one</em> to Ag₂S.
There are two silver atoms in each formula unit Ag₂S. Both would end up in AgCl. However, there's only one silver atom in each formula unit of AgCl. Two Ag atoms would make two formula units of AgCl. In other words, each mole formula units of Ag₂S would produce <em>two</em> moles formula units of AgCl.
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There are 0.702 moles of Ag₂S formula units in 174 grams of the compound. That would lead to of AgCl.
What's the mass of 1.40 mol of AgCl?
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Answer:
Well, currently CO2 levels have been increased. The concentration of this gas has not stopped increasing since the beginning of the sixties, when the records of this gas began to be made.
Explanation:
The atmospheric concentration of CO2 has reached 415 parts per million, passing the 400 barrier, which was exceeded in 2015, the crucial year where the Paris Agreement was signed. This agreement seeks to reduce greenhouse gases whose purpose is to avoid an increase in temperature. The current concentration of carbon dioxide is 145% of the industrial levels, very high levels in the atmosphere for this gas.
There are 2 significant figures.
"Rule 3: Trailing zeros are significant if a decimal point is shown in the number, but may or may not be significant if no decimal point is shown."