Answer:
B. When it is obtained by rounding, as in 3.0
Explanation:
Answer:
the last answer, and I'm stuck on this one too
Explanation:
I did the test
They got to plant heven lol! XD XD
Answer:
Molecule formula is C8Cl4
Explanation:
Empirical formula of a compound is it's simplest formula while the molecular formula gives the exact number of moles of atoms of the component elements in one mole of the compound.
To calculate the molecular formula;
Step 1:
Write the elements in the compound with their percentage quantities.
Carbon = 33.33%
Chlorine = 100 - 33.33 = 66.67%
Step 2:
Divide both components by its relative atomic mass
C = 12, Cl = 35.5
Carbon 33.33/ 12 = 2.7775
Chlorine 66.67/ 35.5 =1.8780
Step 3: divide both values by the smallest
1.8780 is the smallest
So therefore,
2.7775/ 1.8780 = 1.4790 = ~2
1.8780/ 1.8780 = 1
Empirical formulae = C2Cl
(C2Cl)x = 248.75
(12*2 + 35.5)x = 248.75
(59.5)x = 248.75
x = 248.75 / 59.5
x = 4.18 = 4
Molecular formula = C8Cl4
Answer:
Waves; wavelength; electromagnetic energy; ultraviolet light.
Explanation:
Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.
Sound travels faster through solids than it does through either liquids or gases.
Lightwave can be defined as an electromagnetic wave that does not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
Hence, sound and light are both found as waves, with a variety of wavelengths. The sun, a source of light waves specifically, releases a type of electromagnetic energy. It can be found as UVA or UVB types. These lights give off different levels of ultraviolet light, some of which can be harmful.
Additionally, the ultraviolet spectrum is divided into three categories and these are; UVA, UVB ,and UVC.