No, only a chemical change will change what a subtance is...physical change pertains to smell, color, etc...
1 mole ------------- 6.02 x 10²³ atoms
0.70 moles -------- ( atoms zinc )
atoms platinum = 0.70 x ( 6.02 x 10²³ ) / 1
<span> = </span>4.2 x 10²³ atoms zinc
<span>hope this helps!</span>
Answer:
a 1) XZ2
2) YZ
3) X2
b 1) Ionic bond
2) Ionic bond
3) covalent bond
c) ionic compounds has high melting and boiling point
ionic compounds can conduct electicity in aqueous form
covalent compounds have electrons shared between the atoms
covalent compounds have lower melting point compared to ionic compound
Answer:
A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.
Explanation:
The net ionic equation for the precipitation of calcium phosphate from aqueous solution is Ca²+ (aq)+ S²- (aq)=>CaS(s)-----> CaS(s).
<h3>How is a precipitation process expressed in a net ionic equation?</h3>
For a precipitation reaction, the net ionic equation is written by first knowing the precipitate, then use the solubility rules (if there are any).
Then one can write down the precipitate's formula that was made to the right of an arrow. The ions that react to get the precipitate as the reactants to the left of the arrow should have their formulas written down also:
Hence:
Since the molecular fomular is: H2S(aq) + CaCl2(aq) -------> CaS(s) + 2HCl(aq)
Then the full ionic equation will be: 2H^+(aq) + S²-(aq) + Ca²+(aq) + 2Cl^-(aq) -------> CaS(s) + 2H^+(aq) + 2Cl^-(aq)
Learn more about precipitation from
brainly.com/question/21319390
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