Answer:
matter is anything that has mass and takes up space so it could be heavy light small or big
Explanation:
whatever describes mass and space
Polar bond.
A very common example is H2O.
The oxygen atom has an electronegativity value of about 3.5, while the hydrogen atoms have a value of about 2.2 (each).
Electronegativity describes how “greedy” atoms are with sharing electrons.
Since the oxygen atom has a greater value, it will be more “greedy” with the electrons.
Answer:
22×10−3 g
Explanation:
Combustion equation of methane:
CH4 + 2O2 → CO2 + 2H2O
Given data:
mass of methane= 8.00 ×10−3 g
mass of carbon dioxide= ?
Solution 1:
m (CH4) = 8.00 ×10−3 g
v=m /M
v(CH4) = m (CH4)/ M (CH4)
v(CH4)= 8.00 ×10−3 g / 16 g/ mol
v(CH4)= 0.5 ×10−3 mol
according to balance chemical equation:
v(CH4) : v(CO2) = 1:1
v(CH4) = v(CO2)
M(CO2) = 44 g/mol
m (CO2) = M(CO2) × v(CO2)
m (CO2) = 44 g/mol ×0.5 ×10−3 mol = 22×10−3 g
Second method:
molecular weight of methane = 16 g/mol
molecular weight of carbon dioxide = 44 g/mol
mass of methane= 8.00×10−3 g
mass of carbon dioxide= ?
Solution:
mass of carbon dioxide= mass of methane × molecular weight of carbon dioxide / molecular weight of methane
mass of carbon dioxide= 8.00×10−3 g× 44 g/mol / 16 g/mol
mass of carbon dioxide= 22 × 10−3 g
Answer:
Explanation:
Absolute dating uses for example, radiocarbon dating method to tell the numeric age of an organic substance and this is not always exact. In the other hand, relative age dating give a more precision since it is comparing the age of a particular part of the substance to the other parts. For example, comparing the lower layer of a rock to the upper layer, it is certain that the lower layer is older than the upper one.