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snow_tiger [21]
2 years ago
12

Can someone help me?​

Chemistry
1 answer:
Brilliant_brown [7]2 years ago
5 0

Answer:

no, and next time take it right

Explanation:

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Suggest why some manufacturers of car and jewellery would use metal alloys instead of pure metals?
nika2105 [10]
I think using metal alloys would be better than using the pure metal would cut down on the amount of gases that are released in the air.
6 0
3 years ago
Calculate the volume of 12.0 g of helium at 100°c and 1.2 atm
hodyreva [135]

Volume = nRT/P

n = number of particles (moles)

R = universal gas constant (0.0821)

T = temperature (Kelvin)

P = pressure (atm)

(Assuming you have 1 mole of Helium in a chemical reaction) We would need to convert grams to moles: 12.0g He x 1 mol He/4 molar mass of He = 3 mol He

Convert Celsius to Kelvin: 100*C + 273.15 = 373.15 K

Now we can set up the equation for volume: (3mol)(0.0821)(373.15)/1.2atm = 76.6 L of Helium gas

8 0
3 years ago
Which of the following forms a molecular solid? Which of the following forms a molecular solid? C, graphite C10H22 CaO gold
Damm [24]

Answer:

C10H22

Explanation:

Molecular Solids comprises of a Vander waal's force of attraction between the molecule. These forces are very weak when compared to ionic and covalent bond.

In Carbon, Carbon is not a molecule but an atom. One of it unique characteristics is that it forms bonds with other carbon atoms. This property is know as catenation. The bond between these carbon atoms is know as covalent bond.

Graphite is an allotrope of carbon. It exists as black , slippery, hexagonal crystals.The carbon atoms in graphite forms flat layers and are joined together by strong covalent bonds. Graphite can be used as lubricant in engines.

Gold (Au) is an element on the periodic table with atomic number 79 and a mass number 197. It exists as a metal. Most times Gold forms hydrogen bonds.

C10H22 is known as decane. It is the tenth compound formed in the series of alkane family( an organic unsaturated carbon chain family). Alkanes are aliphatic hydrocarbons. The forces of attraction between the alkane family are weak.In decane , their exists Vander waal's force which makes Decane C10H22 a Molecular Solid.

6 0
3 years ago
The stability of atomic nuclei seem to be related to the ratio of _____.
Andru [333]
<span>Neutrons to protons. Neutrons and protons are tiny particles that are within the nucleus. Neutrons and protons make up the nucleus of the cell and the ratio of neutrons determine the stability of the atomic nuclei. The nucleus will become unstable if the ratio of neutrons to protons are not within the appropriate amount.</span>
6 0
3 years ago
Read 2 more answers
Our good friend and pseudo scientist, homer simpson, attempts to analyze 300 mg of an unknown compound containing only c and h b
iragen [17]
C_{x}H_{y} + O_{2} --\ \textgreater \  x CO_{2} + \frac{y}{2} H{2}O&#10;&#10;540mg H_{2}O* \frac{1 mmol H_{2}O}{18 mg H_{2}O} =30 mmol H_{2}O&#10;&#10;\\ \\30 mmolH_{2}O   -have  -  60 mmol H&#10;\\  \\ 60 mmol H* \frac{1mg H}{1 mmol H}    =60 mg H&#10;\\ \\300mg C_{x}H_{y} - 60 mg H= 240 mg C&#10;\\ \\ 240 mgC* \frac{1mmol}{12mg} =20 mmol C&#10;&#10;20 mmol C: 60 mmol H=1 mol C : 3 mol H&#10;&#10;
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3 years ago
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