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 04:50
Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?
Answers: 1
Chemistry, 22.06.2019 18:10
Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)
Answers: 1
Chemistry, 22.06.2019 21:00
Acandle’s wick is the fabric string that holds the flame, and it burns down at a constant slow pace when the candle is lit. the wick is usually surrounded by wax. which is the most important property of covalent compounds that makes them useful for making candle wax? a low boiling point a low melting point a high boiling point a high melting point
Answers: 1
8. Read the text and answer the questions:
oxides, one of them very poisonous. The other is readily...
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