carbon-14
phosphorus-32
cobalt-60
iodine-131
Correct answer is C
No explanation has been provided for this answer.
How many atoms are present in 6.0g of magnesium? [Mg = 24, N.A = 6.02 x 10 \(^{23}\)mol]
1.20 x 10\(^{22}\)
2.4 x 10\(^{22}\)
1.51 x 10\(^{22}\)
3.02 x 10\(^{22}\)
Correct answer is C
No explanation has been provided for this answer.
0.40 moldm\(^{-3}\)
0.50 moldm\(^{-3}\)
0.05 moldm\(^{-3}\)
0.30 moldm\(^{-3}\)
Correct answer is B
No explanation has been provided for this answer.
Zn
Ca
Al
Pb
Correct answer is A
No explanation has been provided for this answer.
1-methyl pentane
3-methylbutane
2-methylbutane
1-dimethyl propane
Correct answer is C
The longest carbon chain is butane, with one substituent attached at carbon number 2
therefore the compound is named 2-methyl butane
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