B is an isotope of the element 23892Ur. The isotope B has
46 protons and 119 neutrons
92 protons and 92 neutrons
92 protons and 146 neutrons
92 protons and 238 neutrons
Correct answer is C
No explanation has been provided for this answer.
1.45x1023
1.50 x l023
3.00x1023
3.15x1023
6.00x1023
Correct answer is B
No explanation has been provided for this answer.
Chlorine is used in water purification because it
bleaches impurities in the water
decolorizes water
destroys bacteria
is extremely soluble in water
is pleasant tasting
Correct answer is C
No explanation has been provided for this answer.
Which statement is NOT true about the composition of starch?
It contains only the atoms of carbon, hydrogen oxygen
It is a polysaccharide
Its empirical formula is C2H20.
It is made from the monomerC6H12O6.
The hydrogen and oxygen atoms are in the ratio 2:1.
Correct answer is C
No explanation has been provided for this answer.
Which compound is a component of baking powder?
Na2CO3
Na2SO4
KH2CO3
NaHCO3
NaHSO4
Correct answer is D
No explanation has been provided for this answer.