Answer:
Explanation:
An element whose atomic number is 68 (number Z), has 68 electrons and 68 protons. According to the periodic table it corresponds to the element Erbium (Er), whose mass number (A) is 167. The number of neutrons is 167-68 = 99.
14mg to kg
1kg = mg /1,000,000
Answer would be
0.000014kg
Answer:
Explanation:
Start with the number of grams of each element, given in the problem.
Convert the mass of each element to moles using the molar mass from the periodic table.
Divide each mole value by the smallest number of moles calculated.
Round to the nearest whole number. This is the mole ratio of the elements and is.
Answer:
Explanation:
The oxidizing agent in a chemical reaction is the reactant that undergoes chemical reduction. An oxidizing agent is an electron pair acceptor which causes a co-reactant to be oxidized in a reaction.
In the given reaction MnO₄⁻ is the oxidizing agent.
One of the ways to spot an oxidizing agent is that the number of electronegative atoms around it reduces considerably.
Also we see that the oxidation number of Mn reduces in moving from reactants to products.
