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valentina_108 [34]
2 years ago
10

Which statements prove the law of conservation of matter (select all that apply)

Chemistry
1 answer:
andre [41]2 years ago
3 0
D . Water evaporating in the water cycle is an open system
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A galvanic cell generates a cell potential of 0.32V when operated under standard conditions according to the reaction above. Whi
Ugo [173]

The complete question is shown in the image attached to this answer.

Answer:

C

Explanation:

Let us quickly remember that the EMF of a cell under non standard conditions in given by the Nernst equation.

This equation states that;

E = E°cell - 0.592/n log Q

Where

E = EMF under non standard conditions

E°cell= standard EMF of the cell

n = number of electrons transferred

Q = reaction quotient

If the reaction quotient is greater than 1 then cell potential is less than the standard cell potential.

The cell that generates the lowest cell potential is the cell depicted in option C because Q has the greatest positive value(Q<1).

6 0
2 years ago
Estimate the standard internal energy of formation of liquid methyl acetate (methyl ethanoate, ch3cooch3) at 298 k from its stan
LenKa [72]

solution:

the reaction for formation of methyl acetate is\\CH_{3}OH+CH_{3}COOH----------->CH_{3}COOCH_{3}+H_{2}O\\standard internal energy \\\delta u=\delta H -\delta(pv)=\delta H -\delta n\times RT\\where \delta n=change in number of moles=0\\\delta u=\delta H\\=-442kj/mol

6 0
3 years ago
Read 2 more answers
Is it possible to use subatomic particles as an energy source?
Alex17521 [72]

Yes, Is it possible to use subatomic particles as an energy source.

<h3>What are subatomic particles?</h3>

A subatomic particle is nothing but a particle which is smaller than an atom in size. Typically, an atom can be broken down into three subatomic particles, namely: protons, electrons, and neutrons.

Yes, Is it possible to use subatomic particles as an energy source.

There are instances when the protons and electrons in an atom's outermost shells are not strongly attracted to one another. It is possible to force these electrons out of their orbits.

They may move from one atom to another by exerting force. Electricity is made up of these moving electrons.

Learn more about subatomic particles here:

brainly.com/question/13303285

#SPJ1

8 0
2 years ago
PLEASE HELP ASAP - WILL GIVE YOU BRAINIEST Can someone please help me figure out the correct answer to a science problem? I need
Alexxandr [17]

independent variable: how much bread is there

dependant variable: temperature, location, time, size.

hypothesis, the one with the bread will be way more moist than the one without.

control group: no bread at all.

experimental group: brownies with bread

constants: same tupperware, placement, time, size.

Hoped this helped!

8 0
3 years ago
A sample of a substance has these characteristics: melting point of 984 K hard, brittle solid at room temperature poor conductor
ANEK [815]

The correct answer is option 4, that is, an ionic compound.  

The mentioned features belong to an ionic compound. The ionic compounds exhibit strong bonds in between their atoms, that is, an ionic bond is the strongest molecular bond, this confirms that ionic compounds exhibit a high melting point.  

The ionic compounds do not transmit current, as they do not possess free electrons, like metals, thus, they are poor conductors as solid. The ionic compounds get dissolve in water and form ions that are the charges, which can move, making them good conductors as a liquid. The composition of the ionic compound is a set of crystals that makes them brittle and hard.  

7 0
3 years ago
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