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hoa [83]
3 years ago
14

PLZ HELP

Chemistry
1 answer:
Vikki [24]3 years ago
3 0

B) both scientists could be right.

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Classify the following compounds as having covalent or ionic bondsa. dinitrogen trioxideb. carbon dioxidec. calcium chlorided. m
yKpoI14uk [10]

Compounds having covalent bonds are dinitrogen trioxide, carbon dioxide.

compounds having ionic bonds are calcium chloride, Magnesium nitride, sodium bromide, aluminum oxide.

Explanation:

When a positive charged cation gets bonded with negative charge anion by transferring its electrons the ionic bonds are formed. It is seen between metals and non-metals.

In covalent bonds the electrons are shared equally between two atoms. It is generally seen bonds between 2 non metals.

Dinitrogen trioxide : It is a covalent compound as bonding between two non metals is there ie nitrogen and oxygen.

In carbon dioxide carbon has four electrons in outermost shell which have strong attraction with nucleus cannot be lost neither it can accommodate 4 electrons to stabilize the valence shell. Thus sharing takes place and its covalent bonding.

In calcium chloride ionic bond is formed because calcium gives 2 electrons to each of the chloride atoms and thus gets 2+ charge on calcium. Sharing of electrons let the octet complete.

Magnesium nitride is formed when Mg loses 2 electrons to complete octet and nitride gains 3 electrons. The electrostatic attraction causes ionic bonding in it.

sodium bromide: Bromine is electronegative i.e electron donor and sodium is highly electrospositive hence sharing of electrons would cause electrostatic attraction between them.

aluminum oxide : The ideal situation of ionic bonds that is between metal and non-metals is present in aluminum oxide.

7 0
3 years ago
Cyclohexene, a hydrocarbon, has a molar mass of 82.1 g/mole. if the combustion of 0.8300 g cyclohexene produces 0.9102 g h2o and
adelina 88 [10]

Answer is:  the molecular formula is C₆H₁₀.

Chemical reaction: C₆Hₓ + yO₂ → 6CO₂ + x/2H₂O.

m(H₂O) = 0.9102; mass of the water.

n(H₂O) = m(H₂O) ÷ m(H₂O)  

n(H₂O) = 0,9102 g ÷ 18 g/mol

n(H₂O) = 0,0505 mol.

From chemical reaction: n(H) = 2 · n(H₂O).

n(H) = 0.101 mol.

m(CO₂) = 2.668 g; mass of carbon dioxide.

n(CO₂) = 2.668 g ÷ 44 g/mol.

n(CO₂) = 0.0606 mol; amount of the substance.

n(CO₂) = n(C) = 0.0606 mol.

n(C) : n(H) = 0.606 mol : 0.101 mol.

n(C) : n(H) = 6 : 10; proportion of carbon and hydrogen atoms in cyclohexene.

8 0
4 years ago
Read 2 more answers
An open flask sitting in a lab fridge looks empty, but it is filled with a mixture of gases called air. Calculate the number of
KATRIN_1 [288]

Answer: The number of molecules of gas the flask contains is 0.674\times 10^{23}

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 1 atm   (STP)

V = Volume of gas = 2.50 L

n = number of moles  = ?

R = gas constant =0.0821Latm/Kmol

T =temperature = 273K (STP)

n=\frac{PV}{RT}

n=\frac{1atm\times 2.50L}{0.0821 L atm/K mol\times 273K}=0.112moles

According to Avogadro's law:

1 mole of gas at STP contains =6.023\times 10^{23} molecules

Thus 0.112moles of gas at STP contains = \frac{6.023\times 10^{23}}{1}\times 0.112=0.674\times 10^{23} molecules

The number of molecules of gas the flask contains is 0.674\times 10^{23}

7 0
3 years ago
Select the correct characteristics describing normal-phase and reversed-phase chromatography. Normal-phase chromatography Revers
qwelly [4]

Answer:

(a) Polarity of phase: 1. Stationary phase is polar

b) Eluent strength of solvent:  1. Increases as solvent becomes more polar

c) Nature of solutes.1. Polar

d) Nature of solute interaction:2. More soluble in mobile phase as the polarity of the mobile phase decreases

e) Polarity of phases: 1. Stationary phase is polar

f) Eluent strength of solvent: 1. Increases as solvent becomes more polar.

g) Nature of solutes: 1. Polar

h) Nature of solute interaction: 2. More soluble in mobile phase as the polarity of the mobile

Explanation:

3 0
3 years ago
1. What branch of chemistry is foundational to the other<br> areas of chemistry?
Ivahew [28]

Answer:

Physical, Inorganic, Biochemistry, Analytical, and Organic

Physical chemistry deals with applying physics to the study of matter. It's also probably the most important branch. Inorganic chemistry deals with stuff that is chemically composed of elements other than carbon. The branch of Biochemistry concerns itself with living things. Analytical chemistry deals with analyzing and finding out what substances are present in a particular material and how much of each substance is present. Finally, organic chemistry deals with substances that are compounds of carbon.

Explanation:

3 0
3 years ago
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