Answer:
The number of molecules in a mole (known as Avogadro's constant) is defined such that the mass of one mole of a substance, expressed in grams, is equal to the mean molecular mass of the substance. The molecular mass of CO2 = 12+2x16 = 44, so the mass of a mole of CO2 is approximalty 44 grams
Explanation:
The answer is c this is the answer
Answer:
height(h)=10 m
acceleration due to gravity (g)=10 m/s^2
mass (m)=?
potential energy=67
or,mgh= 67
or,m×10×10=67
or,m=67/100
or,m=0.67 kg
Therefore,m= 670 grams
Answer:
Place 20.0 g NaOH(s) in a flask and dilute to 1.00 L with water.
Explanation:
Answer:
Where it is on the periodic table
Explanation:
The periodic table is a table that provides a systematic pattern for arranging elements.
The table is based on the periodic law. The modern version of the periodic law states that " the properties of elements are periodic function of their atomic number".
In the modern periodic table, elements having the same number of electrons in their outermost shell are placed over one another in a vertical column.
Elements in the same group exhibits similar chemical properties because of the same number of electrons in their outermost shell. Physical properties also varies progressively down any group.
So, the position of an element on the periodic table determines its properties.