Answer:
An element is a substance that cannot be split out into simpler substance by chemical means
A compound i is a substance consisting atoms of 2 or more different elements and these atoms are chemically joined together
Explanation:
Assuming a basis of 100 g of Kevlar, therefore the masses
are:
C = 70.6 g
H = 4.2 g
N = 11.8 g
O = 13.4 g
We know the molar masses are:
C = 12.01, H = 1.008, N = 14.01, O = 16.00
Calculating for the moles per element:
C = 70.6 / 12.01 = 5.88 mol
H = 4.2 / 1.008 = 4.17 mol
N = 11.8 / 14.01 = 0.84 mol
O = 13.4 / 16 = 0.84 mol
To get the empirical formula, the next step is to divide
everything by the smallest moles = 0.84. So:
C = 7
H = 5
N = 1
O = 1
Hence the empirical formula is:
C7H5NO
Answer:
Brittle
Explanation:
because thas for non metals
Answer:
[Ar] 4s2 3d10 4p3
Explanation:
Arsenic is Element 33. It is the 15th element in the Fourth Row, following the noble gas Ar at the end of the Third Row.
Thus, its noble gas electron configuration is
[Ar] 4s2 3d10 4p3
Answer:
Why has my town experienced record-breaking cold and snowfall if the climate is warming? Is there scientific consensus that people are causing today's climate change? Do natural variations in climate contribute to today's climate change?
Explanation:
Yan po ang answer tama po yan
