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Dominik [7]
2 years ago
7

How many joules are required to heat 120.5!grams of water from 5.6°C to 62.5°C

Chemistry
1 answer:
DENIUS [597]2 years ago
6 0

Answer:

The amount of energy required is 17 kJ.

Explanation:

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Show work: Convert 4.21g of K3PO4to atoms
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1.1943571. The molar mass of K3PO4 is 212.27. After using stochieometry, you get your answer.
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2 years ago
Determine the net change in NADHNADH , FADH2FADH2 , and GTPGTP from the passage of two acetyl-SCoA molecules through the citric
CaHeK987 [17]

Answer:The citric acid cycle is the final common pathway for the aerobic oxidation of fuel molecules. Moreover, as we will see shortly (Section 17.3) and repeatedly elsewhere in our study of biochemistry, the cycle is an important source of building blocks for a host of important biomolecules. As befits its role as the metabolic hub of the cell, entry into the cycle and the rate of the cycle itself are controlled at several stages.

Explanation:

8 0
3 years ago
The blue colour of the sky results from the scattering of sunlight by air molecules. Blue light has a frequency if about 7.5*10^
erastovalidia [21]

Answer: The energy of a mole of photon associated with this frequency is 49.5\times 10^{-20}J

Explanation:

The energy and frequency are related by :

E=N\times h\times \nu

E = energy of photon

N = number of moles = 1

h = planks constant = 6.6\times 10^{-34}Js

\nu = frequency = 7.5\times 10^{14}Hz

E=1\times 6.6\times 10^{-34}Js\times 7.5\times 10^{14}s^{-1}=49.5\times 10^{-20}J

The energy of a mole of photon associated with this frequency is 49.5\times 10^{-20}J

6 0
2 years ago
15. In the image given below, magnesium metal is coiled as a thin ribbon. What property of metal is exhibited by it? A Ductility
Sholpan [36]

Answer: The property of magnesium that is exhibited by it is DUCTILITY. The correct option is A.

Explanation:

Magnesium is a member of the alkaline earth metals. It occurs in nature, only in the combined state, as Epsom salt, dolomite and in many trioxosilicates( IV) including talc and asbestos. They have the following physical properties:

--> Appearance: they are silvery-white solids

--> Relative density: It has a relative density of 1.74

--> DUCTILITY: it's very ductile in nature

--> melting point: it has a melting point of 660°C.

--> Conductivity: They are good conductor of heat and electricity.

Furthermore, DUCTILITY is the physical property of a metal associated with the ability to be hammered thin or stretched into wire without breaking. A metal such as magnesium can therefore be coiled as a thin ribbon without fracturing due to its ductile physical properties.

8 0
2 years ago
PLEASE HELP
devlian [24]
Metals have a low electron affinity- a less likely chance to gain electrons because they want to give up their valence electrons rather than gain electrons, which require more energy than necessary.
6 0
2 years ago
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