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Natasha2012 [34]
3 years ago
10

What kinds of evidence are scientists using to learn about how the moon came to be ?

Chemistry
1 answer:
slamgirl [31]3 years ago
7 0

Answer:

were learning about this right now can you help me with the wuestion 8th grade sucks.

Explanation:

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A large glycogen molecule is converted into may smaller glucose molecules.what type of chemical reaction is this
likoan [24]
Answer is: catabolism.

Missing question:
Synthesis.
Catabolism.
Rearrangement.
Anabolism.
Catabolism (<span>the set of </span>metabolic<span> pathways)</span> breaks down large molecules (in this example glycogen, a polysaccharide) into smaller units (in this example glucose, a monosaccharide).
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2 Zn + 2HNO2-&gt; 2 ZN(NO2)2 + H2
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3 years ago
the normal boiling point of ethanol is 78.3 and its molar heat of vaporization is 393. Calculate the vapor pressure of ethanol a
madam [21]

<u>0.12 atm</u><u> </u><u>vapor pressure</u><u> of ethanol at 45.0 C.</u>

What is vapor pressure in science definition?

  • Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature.
  • The temperature at which the vapour pressure at the surface of a liquid becomes equal to the pressure exerted by the surroundings is called the boiling point of the liquid.

We will use the Clausius-Clapeyron equation,

ln(P2/P1) = dHvap/R[1/T1-1/T2]

where,

P1 = unknown

P2 = 1 atm

T1 = 30 oC = 30 + 273 = 303 K

T2 = 78.3 oC = 78.3 + 273 = 351.3 K

dHvap = 39.3 kJ/mol = 39300 J/mol

R = 8.314 J/K.mol

Feed values,

ln(1/P1) = 39300/8.314[1/303 - 1/351.3]

P1 = 0.12 atm

thus, the vapor pressure at 30° C is 0.12 atm.

Learn more about vapor pressure

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8 0
2 years ago
Which set of elements have chemical properties similar to carbon
KonstantinChe [14]

Answer:

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Explanation:

carbon group element, any of the six chemical elements that make up Group 14 (IVa) of the periodic table—namely, carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl).

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