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Harrizon [31]
3 years ago
15

A student made this model of a carbon dioxide molecule. its has one carbon atom and two oxygen atoms what is the correct way to

write the chemical name of carbon dioxide
Chemistry
2 answers:
ExtremeBDS [4]3 years ago
4 0
The proper way to chemically write carbon dioxide is CO2
evablogger [386]3 years ago
4 0

Answer:

The chemical name of carbon dioxide is CO_2.

Explanation:

C+2O\rightarrow CO_2

In a model of carbon dioxide made by the student there are one carbon atom and two oxygen atoms which means that total atoms in the molecule of carbon-dioxide is three.

While writing the chemical name of the carbon dioxide we will first write the symbol of the electropositive atom and then electronegative atom:CO_2

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The zinc within a copper-plated penny will dissolve in hydrochloric acid if the copper coating is filed down in several spots (s
Mrac [35]

Answer:

Mass of hydrogen gas evolved is 0.0749 grams.

Explanation:

Total pressure of the gases = p = 758 mmHg

Vapor pressure of water = 23.78 mmHg

Pressure of hydrogen gas ,P =  p - 23.78 mmHg = 758 mmHg - 23.78 mmHg

P = 734.22 mmHg = \frac{734.22}{760} atm=0.966 atm

Temperature  of of hydrogen gas ,T= 25°C =298.15 K

Volume of hydrogen gas = V = 0.949 L

Moles of hydrogen gas =n

PV = nRT (Ideal gas equation )

n=\frac{PV}{RT}=\frac{0.966 atm\times 0.949 L}{0.0821 atm L/mol K\times 298.15 K}

n = 0.03745 mol

Moles of hydrogen gas = 0.03745 mol

Mass of  0.03745 moles of hydrogen gas  = 0.03745 mol × 2 g/mol = 0.0749 g

Mass of hydrogen gas evolved is 0.0749 grams.

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3 years ago
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Which machine is the least simple? a bike a screw an inclined plane a lever
Ivenika [448]

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A bike is composed of various simple machines. It has a wheel and axle as one component, and it also has screws to hold the various parts together, along with levers and pulleys that are connected to the pedals. So all of these simple machine concepts work together to help transport the rider from point A to point B.

The other answer choices of screw, inclined plane, and lever, are fairly simple machines that don't have many things going on at once compared to a bike.

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