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netineya [11]
2 years ago
14

Which of the following is in the same group as strontium? a Calcium b Chlorine c Xenon d Silver

Chemistry
2 answers:
klasskru [66]2 years ago
6 0

Answer:

Calcium and strontium are in the same group.

Group 2a of the perodic table are the alkaline earth metals

matrenka [14]2 years ago
4 0

Answer:

a. Calcium

Explanation:

Strontium and Calcium are both in the same group, Group 2.

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A sample of a compound is found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen. What is the empirical formula of this
Shtirlitz [24]

Answer:

The empirical formula is CH2O, and the molecular formula is some multiple of this

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We divide thru to get, C:H:O = 3.33:6.65:3.34. When we divide each elemental ratio by the LOWEST number, we get an empirical formula of CH2O, i.e. near enough to WHOLE numbers. Now the molecular formula is always a multiple of the empirical formula; i.e. (EF)n=MF.So 60.0⋅g⋅mol−1=n×(12.011+2×1.00794+16.00)g⋅mol−1.Clearly n=2, and the molecular formula is 2×(CH2O) = CxHyOz.

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