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2 years ago

Please HELP!!! I DESPERATELY NEED THESE TO BE CORRECT!

Chemistry

2 answers:

Butoxors [25]2 years ago

7 0

Answer:

Explanation:

kramer2 years ago

6 0

Answer:

i only know 6 whitch is the +ion

Explanation:

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Read the following sentences: “This substance on copper is green. It is called verdigris. Paola said, ‘In Spanish, the word for

Pachacha [2.7K]

Answer:

See below.

Step-by-step explanation:

The author is probably reminding us that knowing the origins of words helps us to remember what they mean.

If "verde" means "green", the "verd" in "verdigris" probably means that verdigris is green.

However, the "verd" in verdigris domes from other languages.

It was originally Latin "viride aeris" (green brass).

In old French it became "verte de Grèce" (green of Greece). The modern French spelling is "vert-de-gris" (green of grey).

The English word "verdigris" comes from the French words.

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How many miles is 1125.90 feet ?

kari74 [83]

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A scientist who is trying to develop a material that is soft and malleable and also conducts electricity will likely use a__

Sonbull [250]

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jok3333 [9.3K]

in the periodic table, a set of properties repeats from row to row

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A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mm Hg. The flask is opened and more gas is added to the flask. The new

Artyom0805 [142]

Answer: There are now 2.07 moles of gas in the flask.

Explanation:

$PV=nRT$

P= Pressure of the gas = 697 mmHg = 0.92 atm (760 mmHg= 1 atm)

V= Volume of gas = volume of container = ?

n = number of moles = 1.9

T = Temperature of the gas = 21°C=(21+273)K= 294 K (0°C = 273 K)

R= Value of gas constant = 0.0821 Latm\K mol

$V=\frac{nRT}{P}=\frac{1.9\times 0.0821 \times 294}{0.92}=49.8L$

When more gas is added to the flask. The new pressure is 775 mm Hg and the temperature is now 26 °C, but the volume remains same.Thus again using ideal gas equation to find number of moles.

$PV=nRT$

P= Pressure of the gas = 775 mmHg = 1.02 atm (760 mmHg= 1 atm)

V= Volume of gas = volume of container = 49.8 L

n = number of moles = ?

T = Temperature of the gas = 26°C=(26+273)K= 299 K (0°C = 273 K)

R= Value of gas constant = 0.0821 Latm\K mol

$n=\frac{PV}{RT}=\frac{1.02\times 49.8}{0.0821\times 299}=2.07moles$

Thus the now the container contains 2.07 moles.

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2 years ago