The net force is 15 and the box moves to the right
Answer:
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Answer:
56.8 g
Explanation:
Your first conversion factor is the molar mass of H2O to convert from grams of water to moles. Your second conversion factor is the mole ratio of 2 mol C2H10 for every 10 mol H2O. Your last conversion factor is the molar mass of C2H10 to convert from moles back to grams.
150. g H2O • (1 mol H2O / 18.02 g H2O) • (2 mol C2H10 / 10 mol H2O) • (34.1 g C2H10 / 1 mol C2H10) = 56.8 g C2H10
7. D. 668 joules
8. B. 3 grams
<h3>Further explanation</h3>
Given
2 grams of water
6768 joules of energy
Required
Energy
Mass of water
Solution
The heat to change the phase can be formulated :
Q = m.Lf (melting/freezing)
Q = m.Lv (vaporization/condensation)
Lf=latent heat of fusion
Lv=latent heat of vaporization
7. phase change (ice to water)⇒Heat of fusion water=334 J/g
Q = 2 g x 334 J/g
Q = 668 J
8. phase change(water to vapor)⇒heat of vaporization water=2260 J/g
6768 J = m x 2260 J/g
m = 3 g
Carbon monoxide : mixture, cigarette smoke : element and ice : element ,none of them are correctly matched, therefore option 3 is correct'
Crystalline structures are created when water molecules have been organized in an ordered, cage-like form. Crystalline compounds, such as ice particles as well as water molecules, are composed of particles or molecules which are arranged in a particular order to produce an ordered component known as just a crystalline compound.
Even though it is made up of a chemical link between an atom of carbon and an atom of oxygen, carbon monoxide would be a pure material. There is only one kind of molecule that makes up carbon monoxide, when nothing is physically mixed with that as well.
carbon monoxide = pure substance
cigarette smoke = mixture
Ice = element
Hence, carbon monoxide : mixture, cigarette smoke : element and ice : element ,none of them are correctly matched, therefore option 3 is correct'
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