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topjm [15]
4 years ago
13

A rook is dropped into a graduated cylinder filled with 35 mL of water.

Chemistry
1 answer:
KonstantinChe [14]4 years ago
7 0

Answer:

5 cm³.

Explanation:

The following data were obtained from the question:

Volume of water = 35 mL

Volume of water + Rock = 40 mL

Volume of rock =.?

The volume of the rock can be obtained as follow:

Volume of rock = (Volume of water + Rock) – (Volume of water)

Volume of rock = 40 – 35

Volume of rock = 5 mL

Finally, we shall convert 5 mL to cm³. This can be obtained as illustrated below:

1 mL = 1 cm³

Therefore,

5 mL = 5 cm³

Thus, the volume of the rock is 5 cm³.

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50 mL of a chlorofluorocarbon gas effused through a porous barrier in 157 seconds. The same volume of argon effused in 76 second
Anna11 [10]

Answer:

CCl_{2}FCF_{3}

Explanation:

To solve this equation we can use Graham's Law of effusion to calculate the molar mass of the chloroflourocarbon

\sqrt{\frac{M_{1} }{M_{2} } } = \frac{t_{1} }{t_{2} } \\\\\sqrt{\frac{M_{1} }{39.948 } } = \frac{157 }{76}\\\\\\M_{1}  = 170.477\\

Which chloroflorocarbon has this molar mass?

C2Cl2F4

7 0
3 years ago
In the first law of thermodynamics, Δ e=q-w what does q stand for
VLD [36.1K]
Answer:
the heat exchange between the system and the surrounding medium

Explanation:
The first law of thermodynamics states that: "Energy can neither be created nor destroyed, but can convert from one form to another"
It is represented mathematically as:
<span>Δ e=q-w
where:</span>
<span>Δ e is the total change in the system's internal energy
q is </span><span>the heat exchange between the system and the surrounding medium
w is the work done either on the system or by the system

Hope this helps :)
</span>
5 0
3 years ago
What is the formula for a hydrate which consists of 90.7 % SrC2O4 and 9.30 % H20
jekas [21]
Carbon dioxide could possibly be the answer unfortunately idk wat im talking about
5 0
3 years ago
Read 2 more answers
Given R
icang [17]

Answer:

Explanation:

there are  a certain amount of atoms

6 0
3 years ago
How much heat must be removed from 357 g of water at 76.9C in order to cool it down to 18.1C?
Scrat [10]

Answer:

58.8C of heat

Explanation:

76.9C is the current heat temperature, to decrease it to 18.1C we have to subtract the both and later find our answer

4 0
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