The law of definite proportions states that
pure samples of the same compound contain the same elements combined in the same proportion by mass
pure samples of substances are in the same proportion by mass
chemical compounds are pure because they contain the same elements
matter can neither be created nor destroyed.
Correct answer is A
The Law of Definite Proportions states that all pure samples of a particular chemical compound contain similar elements combined in the same proportion by mass.
1:1
1:2
2:1
2:3
Correct answer is A
1g of Hydrocarbon = 0.93g of Carbon, therefore, Hydrogen = (1 - 0.93)g = 0.07g
C : H
0.93 : 0.07
\(\frac{0.93}{12}\) : \(\frac{0.07}{1}\)
0.078 : 0.07
\(\frac{0.078}{0.07} : \frac{0.07}{0.07}\)
\(\approxeq 1:1\)
Which of the following statements is true about ionic radius? Ionic radius
increases as nuclear charge increases
decreases as nuclear charge increases
decreases as nuclear charge decreases
remains constant as nuclear charge increases
Correct answer is B
No explanation has been provided for this answer.
Which of the following methods can be used to seperate blood cells from plasma?
Centrifugation
Filtration
Chromatography
Distillation
Correct answer is A
No explanation has been provided for this answer.
+2 to +3
0 to +2
+3 to +2
+3 to 0
Correct answer is C
The oxidation number of Iron in \(FeCl_{3}\) = +3. The oxidation number in \(FeCl_{2}\) = +2.