Answer:
Remove 1 electron
Explanation:
In the atom of each element, there are three subatomic particles viz: proton, neutron and electron. The number of proton (positively charged) and electron (negatively charged) determines the charge of that element. The more the proton, the more positively charged an ion is and vice versa for electron.
According to this question, a neutral atom of lithium (Li) with atomic no. 3 is given i.e. a lithium atom with charge 0. To make the lithium atom's charge change to +1, ONE ELECTRON MUST BE REMOVED OR LOST.
Note that, the proton number (atomic number) of an element does not change, rather the electron number changes in relation to the no. of protons.
Answer:
i think multipling 30 to the 40
30 × 40 = 1200ppt
Answer:
HBr is a strong acid
Explanation:
KBr is a salt which makes a base . also KOH is a base
Answer: m = 17.5 g Cl
Explanation: To find the mass of Cl we will need to convert the moles of Cl to mass using the relationship of 1 mole = molar mass of Cl.
0.500 mole Cl x 35 g Cl / 1 mole Cl
= 17. 5 g Cl
Answer:
71.5 %
Explanation:
mercury + bromine ⟶ compound
Mass/g: 60.2 24.0
According to the <em>Law of Conservation of Mass</em>, the mass of the product must equal the mass of the reactants
Mass of product = 60.2 + 24.0
Mass of product = 84.2 g
The formula for <em>percent composition</em> is
% by mass = mass of component/total mass × 100 %
% Hg = 60.2/84.2 × 100
% Hg = 0.7150 × 100
% Hg = 71.5 %
