8. Read the text and answer the questions:
oxides, one of them very poisonous. The other is readily soluble in water and forms a weak
The chemical element X forms several simple substances (allotropic forms). It has 2
oxoacid.
1) which is the element X?
2)Write the names of its allotropic forms.
3)Write the formulas of the oxides and determine the oxidation state of the element X in
each of these two oxides.
4)Represent by an equation the formation of the oxoacid.
5)Calculate how many grams are 2 mol of the element X.
Answers: 1
Chemistry, 22.06.2019 19:50
A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution
Answers: 3
Chemistry, 23.06.2019 03:40
The following questions a24 - a26 relate to 100 ml of 0.0150 m solution of benzoic acid (c6h3cooh). ka(c6h3cooh) = 6.4 x 10^-5. what is the ph of the solution after the addition of 1 x 10^-3 moles of naoh? you may assume no volume change to the solution upon addition of the naoh.
Answers: 2
Chemistry, 23.06.2019 14:30
The atomic number of an element is based on the number of electrons around its core mass of its nucleus number of protons in its nucleus number of neutrons in its nucleus
Answers: 2
8. Read the text and answer the questions:
oxides, one of them very poisonous. The other is readily...
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