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3 years ago

Vicky made the following list to describe humidity:

Chemistry

2 answers:

Naddika [18.5K]3 years ago

7 0

Answer: c

Explanation : because it make sense the most (srry if im wrong!)

kotegsom [21]3 years ago

7 0

Answer: It is the amount of moisture in the air.

Explanation:

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Which of the following gas samples would have the largest volume, if all samples are at the same temperature and pressure?

Alona [7]

Answer:

Explanation:

they would all have the same volumes

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2 years ago

How are the elements organized on the periodic table

Inessa [10]

Answer: By atomic number

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3 years ago

Read 2 more answers

Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Supposed 0.301 g of methane

Nina [5.8K]

Answer:

The maximum mass of CO2 that could be produced is 0.1925 grams

Explanation:

Step 1: Data given

Mass of methane = 0.301 grams

Mass of oxygen = 0.28 grams

Molar mass of ethane = 16.04 g/mol

Molar mass of oxygen = 32 g/mol

Step 2: The balanced equation

CH4 + 2O2 → CO2 + 2H2O

For 1 mole methane consumed, we need 2 moles of O2 to produce 1 mole of CO2 and 2 moles of H2O

Step 3: Calculate moles of methane

Number of moles =Mass / Molar mass

Number of moles CH4 = 0.301 grams /16.04 g/mol

Moles CH4 = 0.0188 moles

Step 4: Calculate moles oxygen

Number of moles oxygen = 0.28 grams / 32 g/mol

Moles oxygen = 0.00875 moles

Step 5: the limiting reactant

For 1 mole methane consumed, we need 2 moles of O2

Oxygen is the limiting reactant. It will be completely consumed.

Methane is in excess. There will be consumed 0.00875 /2 = 0.004375 moles

There will remain 0.0188 - 0.004375 = 0.014425 moles

Step 6: Calculate moles of CO2

For 1 mole methane consumed, we need 2 moles of O2 to produce 1 mole of CO2

For 0.00875 moles oxygen , we have 0.004375 moles CO2

Step 7: Calculate mass of CO2

Mass CO2 = moles CO2 * Molar mass CO2

Mass CO2 =0.004375 * 44.01 g/mol = 0.1925 grams CO2

The maximum mass of CO2 that could be produced is 0.1925 grams

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3 years ago

A student wants to make a 5.00%solution of rubidium chloride using 0.377g of the substance. what mass of water will be needed to

Alenkasestr [34]

The mass of water that will be needed to make the solution is calculated as below

% solution = mass of the solute/mass of the solvent(water) x100

% solution = 5% = 5/100
mass of the solute =0.377 g
mass of the solvent = ?

let the mass of the solvent be represented by Y

= 5/100 =0.377/y

by cross multiplication

5y= 37.7
divide both side by 5

y =7.54 grams

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3 years ago

Draw all of the Lewis structures of O2 which obey the octet rule and use this Lewis structure or these resonance structures to p

ryzh [129]

Answer:

Each oxygen atom is connected to the central O atom with 2 covalent bonds.

Explanation:

Oxygen atoms are connected by two covalent bonds in the oxygen molecule from the Lewis structure, we see that the bond order for O2 is 2 (a double bond) this is clearly seen in the image attached. There are no resonance structures for the oxygen molecule since there are no partial bonds in the molecule, only the two covalent bonds present.

This structure of oxygen shown in the image is its only structure, showing the covalent bonds formed and other non bonding electrons present in the molecule. The octet rule is followed in drawing the structure. Each oxygen atom possesses an octet of electrons on its outermost shell.

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3 years ago