The grams of CuCl2 required to prepare 1250g of 1.25% by mass is calculated as follow
1250 = 100%
what about 1.25%
by cross multiplication
= 1.25 x1250/100 = 15.63 grams
Answer:
Hg
Explanation:
We are given information about the unknown element, and using each characteristic, we can narrow down the possible elements until we have just one possibility left.
Conducts electricity: This means that the element has to be a metal, or a semi-metal, because non-metals cannot conduct electricity.
Forming chloride and oxide ions: When it is seen that it forms chloride and oxide ions in the form of XCl₂ and XO, it can be seen that this element has an ionic charge of +2. This narrows it down to the elements in <u>Group 2.</u>
Liquid at room temperature: This is tricky, because we realize that there are no elements in group 2 that are liquid at room temperature. So hence we can look at groups 3 to 12, and see if there are any liquid metals with an ionic charge of +2.
Taking all this information into account, we can see that the only element it can be is mercury (Hg).
Answer:
Sorry can't right now and theres pedos out there so no
Love,<em> lavenderhelper</em>
This is a redox reaction where oxidation and reduction take place. Here, Mg(s) oxidizes into Mg²⁺(aq) by increasing oxidation number from 0 to +2 while Ni²⁺(aq) reduces into Ni(s) by decreasing oxidation number from +2 to 0.
Oxidation
Mg(s) → Mg²⁺(aq) + 2 e
Reduction
Ni²⁺(aq) + 2 e → Ni(s)
Hence, 2.0 moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni²⁺(aq).
Answer:
Covalent bond
Explanation:
A chemical bond formed when two atoms share one or more pairs of electrons with each other. Double bond: A covalent bond consisting of two pairs of electrons. Electronegativity : A numerical method for indicating the relative tendency of an atom to attract the electrons that make up a covalent bond.