Answer:
Iron, according to:
Explanation:
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In this case, according to the law of conservation of mass, which states that matter cannot be neither created nor destroyed, it is possible for us to figure out the missing element in the reaction by taking into account this is a single displacement reaction in which Al goes with NO3 to produce the Al(NO3)3, and therefore the other element would be iron (Fe) as can be seen on the following chemical reaction:
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Answer: Option (A) is the correct answer.
Explanation:
The name of ion is hydroxide.
Name of ion is phosphite.
Name of ion is phosphate.
Name of ion is ammonia.
Name of ion is acetate.
Name of ion is oxalate.
Thus, we can conclude that the symbols and names for the ions given correctly is OH-:hydroxide
The mass of piece of sterling silver jewelry is 33.24 g. It contains 92.5% silver Ag by mass. Since, sterling silver is an alloy of Ag-Cu thus, percentage of Cu will be:
% Cu=100-92.5=7.5%
Thus, mass of copper will be:
Molar mass of Cu is 63.546 g/mol, thus, number of moles of Cu can be calculated as follows:
Here, m is mass and M is molar mass.
Putting the values,
Now, in 1 mole of Cu there are thus, in 0.03923 mol, number of Cu atoms will be:
Thus, number of atoms of Cu will be.