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3 years ago

If 500g of copper melts at 1085°C, at what temperature would 250g of copper melt?

Chemistry

1 answer:

Alex787 [66]3 years ago

6 0

Answer:

the copper would melt at the same temperature no matter how much quantity there is so 1085

Explanation:

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Ludmilka [50]

Answer:

Question 1 :

• A compound is ionic if it is made up of a metal or a cation (+) and a non metal or anion (-)

Question 2 :

• While naming ionic compounds, follow the formula → "metal" + "non-metal ending with ide "

• i.e; Sodium Chloride:

${ \rm{Na {}^{ + } _{(aq)} + Cl {}^{ - } _{(aq)} \: \dashrightarrow \: NaCl _{(aq)}} \: \: \: \: \: \: \: \: } \\ { \rm{sodium + chloride \: \dashrightarrow \: sodium \: chloride}}$

Question 3 :

• The answer above that question is perfect.

Question 4 :

1 atom → Mono. But it is highly recommended to ignore it

2 atoms → DI

3 atoms → TRI

4 atoms → TETRA

5 atoms → PENTA ( such as pentaoxide )

7 atoms → HEPTA ( such as heptaoxide )

Question 5 and 6:

Are perfectly answered.

5 0

3 years ago

How many orbitals does the s subshell contain? 1 3 5 7

Kryger [21]

Answer:1

Explanation: There is only one orbital in the s sublevel. It can hold up to two electrons.

6 0

3 years ago

Using Gibbs Equation, dU=TdS-pdV show that (dS/dV) at a constant U =P/T. The reciprocal of (dS/dU)v = 1/T.

Troyanec [42]

Explanation:

dU=TdS-pdV (given)

To prove = 1) $(\frac{dS}{dV})_U=\frac{P}{T}$ (at constant U)

2) $(\frac{dS}{dU})_v=\frac{1}{T}$ (at constant V)

Solution: 1)

dU=TdS-PdV

$PdV=TdS-dU$

$P=\frac{(TdS)}{dV}-\frac{dU}{dV}$

Derivative of constant is zero.

Given that internal energy is ,U = constant

$P=T\frac{dS}{dV}-0$

$\frac{dS)}{dV}=\frac{P}{T}$ (hence proved)

Solution: 2)

dU=TdS-PdV

Differentiating with respect to dU, we get:

$(\frac{dU}{dU})_v=T(\frac{dS}{dU})_v-P(\frac{dV}{dU})_v$

Derivative of constant is zero.

Given that volume is constant , V= constant

$1=T(\frac{dS}{dU})_v$

$(\frac{dS}{dU})_v=\frac{1}{T}$ (hence proved)

5 0

4 years ago

In mutualism _____.

yawa3891 [41]

Answer:

3'' one is correct answer

Explanation:

in mutualism, organisms of different species benefit from cooperation

8 0

3 years ago

2. How can glass be a liquid if it's so hard?

marin [14]

Explanation:

Glass is not a liquid in the strictest sense of the word. But it is also not a standard solid. The chemistry of glass is complex and research is ongoing, but the current consensus is that glass is a phase of matter all its own, known as an "amorphous solid". Scientists refer to any amorphous solid as a "glass". Glass transitions are highly complex and cannot be treated in the same way as traditional phase transitions.

7 0

3 years ago

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