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3 years ago

What does the chemical formula cacl2 show about the compound it represents?

Chemistry

2 answers:

Anna [14]3 years ago

7 0

A chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.

ZanzabumX [31]3 years ago

7 0

Answer:

The compound represents that calcium chloride is an ionic salt made up of 1 calcium ion and 2 chloride ions.

Explanation:

The given chemical formula $CaCl_2$ is of calcium chloride salt.

The chemical formula represents that 1 atom calcium binds with two atoms of chlorine to form a single molecule of calcium chloride.

It is an ionic salt made up 1 calcium ion and 2 chloride ions.

Calcium has atomic number of 20 and chlorine has atomic number of 17. Calcium will loose 2 electrons to gain noble gas stability whereas chlorine atom will gain 1 electron to gain noble gas stability.

$[Ca]=[Ar]4s^2$

$[Ca^{2+}]=1s^22s^2p^63s^23p^6$

$[Cl]=1s^22s^2p^63s^23p^5$

$[Cl^{-}]=1s^22s^2p^63s^23p^6$

$Ca^{2+}+2Cl^-\rightarrow CaCl_2$

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The volume of a sample gas, initially at 25 C and 158 mL, increased to 450 mL. What is the final temperature of the sample of ga

Rashid [163]

Answer:

Final temperature of the gas is 576 $^{0}\textrm{C}$ .

Explanation:

As the amount of gas and pressure of the gas remains constant therefore in accordance with Charles's law:

$\frac{V_{1}}{T_{1}}=\frac{V_{2}}{T_{2}}$

where $V_{1}$ and $V_{2}$ are volume of gas at $T_{1}$ and $T_{2}$ temperature (in kelvin scale) respectively.

Here $V_{1}=158mL$ , $T_{1}=(273+25)K=298K$ and $V_{2}=450mL$

So $T_{2}=\frac{V_{2}T_{1}}{V_{1}}=\frac{(450mL)\times (298K)}{(158mL)}=849K$

849 K = (849-273) $^{0}\textrm{C}$ = 576 $^{0}\textrm{C}$

So final temperature of the gas is 576 $^{0}\textrm{C}$ .

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3 years ago

a bowl of cereal is at a temperature of 62 fahrenheit then the bowl of cereal thermal energy decreases as soon as mass or not ch

rewona [7]

<h3>Answer:</h3>

53 fahrenheit

<h3>Explanation:</h3>

Temperature is a measure of thermal energy. It goes down when thermal energy decreases. Of your choices, the temperature lower than 62 °F is 53 °F.

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3 years ago

I need help with this question

VARVARA [1.3K]

Answer:

2.25×10¯³ mm.

Explanation:

From the question given above, we obtained the following information:

Diameter in micrometer = 2.25 μm

Diameter in millimetre (mm) =?

Next we shall convert 2.25 μm to metre (m). This can be obtained as follow:

1 μm = 1×10¯⁶ m

Therefore,

2.25 μm = 2.25 μm / 1 μm × 1×10¯⁶ m

2.25 μm = 2.25×10¯⁶ m

Finally, we shall convert 2.25×10¯⁶ m to millimetre (mm) as follow:

1 m = 1000 mm

Therefore,

2.25×10¯⁶ m = 2.25×10¯⁶ m /1 m × 1000 mm

2.25×10¯⁶ m = 2.25×10¯³ mm

Therefore, 2.25 μm is equivalent to 2.25×10¯³ mm.

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3 years ago

Identify the statement that describes a scientific law.

tensa zangetsu [6.8K]

Answer:

it is c

Explanation:

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2 years ago

Why does water with salt in it freeze much more slower than water without it ? Explain

serg [7]

When you add salt to water, you lower to freezing point of the substance.

So for example, normal water freezes at 0°C. But water with salt in it won't freeze at 0°C, because its freezing point is lowered.

In answer to the question. It takes longer for water with salt in it to freeze because the substance requires a lower temperature than normal water to freeze.

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3 years ago

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