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Katarina [22]
3 years ago
8

WORTH 20 POINTS PLZZZ HELP WILL GIVE BRANLIEST PLZZZ

Chemistry
2 answers:
inna [77]3 years ago
8 0

Answer: P represents electrical energy, Q represents thermal energy.

Explanation: The toaster takes electrical energy from the electrical socket through wires and converts that into thermal energy that heats up/toasts the bread.

scoundrel [369]3 years ago
5 0

Answer:

P represents electrical energy, Q represents thermal energy

Explanation:

I am sorry if I get this wrong, but when I put it in the sentence - A toaster transforms <u>electrical</u> energy into <u>thermal</u> energy - it made sense to me, so I think that is the answer. I am sorry if this does not help.

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What is the best description of osmosis?
Rus_ich [418]
<span>Movement of water from an area of lower solute concentration to an area of higher solute concentration</span>
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Why do different isotopes of an element generally have the same physical and chemical properties?
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Answer:

The correct answer is because they have same number of protons but different number of neutrons.

Explanation:

Isotopes are atoms of the same element but differ only in the number of neutrons in the nucleus, i.e. they have same atomic number but different mass number.

Mass number is affected as they have different number of neutrons, thus effecting their physical properties.

The number of electrons and protons are same, i.e. their atomic number is same and thus their chemical properties are same as chemical properties are determined by the atom’s electronic configuration and that relates to number of protons.

5 0
3 years ago
The use of nuclear power in place of coal, oil, and natural gas greatly reduces emissions of carbon dioxide and other greenhouse
xz_007 [3.2K]
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2 years ago
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Which sample has more atoms in it? 150.0 g of gold or 10.0 g of lithium.
Deffense [45]

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6 0
3 years ago
Suppose a student started with 142.0 mg of trans-cinnamic acid, 412 mg of pyridinium tribromide, and 2.30 mL of glacial acetic a
nirvana33 [79]

Answer: Theoretical Yield = 0.2952 g

               Percentage Yield = 75.3%

Explanation:

Calculation of limiting reactant:

n-trans-cinnamic acid moles = (142mg/1000) / 148.16 = 9.584*10⁻⁴ mol

pyridium tribromide moles = (412mg/1000) / 319.82= 1.288*10⁻³ mol

  • n-trans-cinnamic acid is the limiting reactant

The molar ratio according to the equation mentioned is equals to 1:1

The brominated product moles is also = 9.584*10⁻⁴ mol

Theoretical yield = (9.584*10⁻⁴ mol) * (Mr of brominated product)

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Percentage Yield is : Actual Yield / Theoretical Yield = 0.2223/0.2952

                                                                                           = 75.3%

4 0
3 years ago
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