Answer:
is the correct choice that is option A.
Explanation:
An electron has 
times the mass of a proton, but an equal and opposite negative charge.
Lets 
is any element represented here.
Where 
is the number of protons as well as its atomic number.
And
is the mass number which is the number of protons and neutrons in any atom.
Note: We know that Hydrogen is devoid of neutron,so number of neutrons in a Hydrogen atom is zero.
Then
is also a representation of single proton.
So is the right choice that is option A.
There is no state that has the highest density. the state of matter is measured by temperature and pressure..
Answer:
C. 2.000 M C6H12O6
Explanation:
Let us obtain the molarity of the solution.
Molar Mass of C6H12O6 = (12x6) + (12x1) + (16x6) = 72 + 12 + 96 = 180g/mol
Mass of C6H12O6 = 180g
Number of mole = Mass /Molar Mass
Number of mole of C6H12O6 = 180/180 = 1mole
Volume = 500mL = 500/1000 = 0.5L
Molarity = mole /Volume
Molarity = 1/0.5
Molarity = 2M
So the solution will be best labelled as 2M C6H12O6
Standard temperature and pressure are 0°C and 1 atmosphere, and of course their equivalents in other units. 0°C=273K, 1 Atm = 101.3 KPa.
From the choices given, the correct answer is (3).
Why use significant digits you ask? Significant digits or significant figures are use as to not be too precise of an actual calculated measure.
Long decimal numbers location like 3.45 * sqrt of 3 gives 5.975575286112627.
That number is too precise.
Rounding it to 5.98 shows an exact closeness to the precision of the measure.
