Considering the definition of alkanes, single bonds are found in an alkane.
Definition of AlkanesAlkanes are a class of hydrocarbons (compounds containing only carbon and hydrogen) that are made up of a variable number of carbon atoms joined together by single bonds. In turn, each carbon atom bonds to hydrogen atoms, which may eventually be replaced by other atoms or functional groups.
In other words, alkanes are open or closed chain molecules that are linked by simple bonds.
Alkanes are saturated hydrocarbons because the bonds between carbon atoms are simple and stable. And as mentioned, the hydrogen atoms bonded to each carbon atom can be replaced by other atoms, such as halogens (fluorine, bromine, chlorine) or various groups or “radicals”. In the latter case, the structure becomes more complex giving rise to branched alkanes.
SummaryIn summary, single bonds are found in an alkane.
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Answer: C) single only
Explanation:
just got it right
How many milliliters of 5.0 M NaOH are needed to exactly neutralize 40. milliliters of 2.0 M HCl?
Answer:
16mL
Explanation:
Using the following formula;
CaVa = CbVb
Where;
Where
Ca = concentration/molarity of acid (M)
Va = volume of acid (mL)
Cb = concentration/molarity of base (M)
Vb = volume of base (mL)
According to the information provided in this question;
Ca (HCl) = 2M
Cb (NaOH) = 5M
Va (HCl) = 40mL
Vb (NaOH) = ?
Using CaVa = CbVb
Vb = CaVa/Cb
Vb = 2 × 40/5
Vb = 80/5
Vb = 16mL
Which has more molecules in it 10g H, 0 or 10g NaCl*
A)010g of H0
B)10g of NaCl
C)They have the same number of molecules
D)Cannot be determined
Answer:
10 grams of hydrogen
Explanation:
A solution in which the [H+] is 1.0 X 10-4 mol/L is said to be:
How many centimeters are in 5 miles? Hint: 1 miles = 5280 feet
Which element has the highest first ionization energy?
a. phosphorus
b. aluminum
c. sodium
d. calcium
Answer:
A) Phosphorus
Explanation:
Look At Question 5) On The Answer Key
The element phosphorus has the greatest first ionization energy.
What is the first ionization energy?The first ionization energy of an element is the energy that is required to remove an electron from the outermost shell of an atom of the element.
We know that ionization energy decreases down the group but increases across the period thus the element phosphorus has the greatest first ionization energy.
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A chemist has three different acid solutions. The first acid solution contains 15 % 15% acid, the second contains 35 % 35% and the third contains 80 % 80% . They want to use all three solutions to obtain a mixture of 190 190 liters containing 30 % 30% acid, using 2 2 times as much of the 80 % 80% solution as the 35 % 35% solution. How many liters of each solution should be used
Answer:
First solution = 133L
Second solution = 19L
Third solution = 38L
Explanation:
As we want to make 190L of a 30%=0.3 solution we can write:
190L*0.3 = a*0.15 + b*0.35 + c*0.80
Where a, b and c are the volume of first, second and third acid solutions, respectively.
The volume of c is twice volume of b:
c = 2b
And the volume of the 3 solutions is equal to 190L:
190L = a+b+c
190L = a+3b
190L*0.3 = (190-3b)*0.15 + b*0.35 + 2b*0.80
57 = 28.5-0.45b+0.35b+1.6b
28.5 = 1.5b
b = 19L
c = 2*19L
c = 38L
a = 190L - 19L - 38L
a = 133L
how a forensic scientist may match DNA of evidence to a particular crime?
1. A light bulb is filled with 3.54 g of argon at 25 C and 725 mmHg. What is
the volume of this gas?
Answer: The volume of given gas is 2.27 L.
Explanation:
Given: Mass = 3.54 g
Temperature = [tex]25^{o}C[/tex] = (25 + 273) K = 298 K
Pressure = 725 mm Hg (1 mm Hg = 0.00131579) = 0.95 atm
As moles is the mass of substance divided by its molar mass.
So, moles of argon (molar mass = 40 g/mol) is as follows.
[tex]Moles = \frac{mass}{molar mass}\\= \frac{3.54 g}{40 g/mol}\\= 0.0885 mol[/tex]
Formula used to calculate the volume of given gas is as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
[tex]PV = nRT\\0.95 atm \times V = 0.0885 mol \times 0.0821 L atm/mol K \times 298 K\\V = 2.27 L[/tex]
Thus, we can conclude that the volume of given gas is 2.27 L.
Explain why the buffering action of these chemical reactions is limited by the present day rate of change for atmospheric CO2 concentration
Answer:
Due to increase in carbondioxide gas.
Explanation:
The buffering action of these chemical reactions is limited by the present day rate of change for atmospheric carbondioxide concentration because the the rate of atmospheric carbondioxide rises as compared to ancient atmospheric carbondioxide gas. Due to increase of human activities, the concentration of carbondioxide gas increases in the atmosphere which limits the buffering action of these chemical reactions so we can say that carbondioxide gas is responsible for its limited action.
Why can’t neon store energy in this way?
Answer:
Neon is a noble gas, it is monoatomic in nature, which implies that it has only one atom present. If we compare neon with water, water has three atoms present, two hydrogen atoms and one oxygen atom. Hence water stores more energy than neon because it is polyatomic and contains chemical bonds.
What is the uses of seawater as a source of renewable energy?
Explanation:
Desalination of seawater is considered a renewable source of water, although reducing its dependence on fossil fuel energy is needed for it to be fully renewable.
Which term is used to measure a star's brightness?
Answer:
Magnitude
Explanation:
Astronomers define star brightness in terms of magnitude (how bright the star appears from Earth)
explain observation Made when anhydrous calcium chloride and anhydrous copper 2 sulphate are separately exposed to the atmosphere for much 2 days
Which explains why the laws
motion are scientific laws?
O A. The theories of motion became laws after there was enough
evidence to prove they were true.
O B. The laws cannot be tested by experiments, but scientists know
that they are correct because they make sense mathematically.
c. The laws explain how objects move and are supported by
experimental evidence.
O D. The laws describe a wide range of observations of motion and can
be used to predict the motion of objects.
Did
Answer:
D
Explanation:
Scientific laws describe how things work with little to no exception. They do NOT provide an explanation to WHY something occurs.
Answer:
The answer is D because scientific laws describe how things work not why they happen.
another name for constant boiling mixture
Answer:
Azeotrope
Explanation:
An azeotrope is a liquid mixture that has a constant boiling point and whose vapor has the same composition as the liquid
Another name for constant boiling mixture.
[tex]\sf\purple{Azeotrope.}[/tex] ✅
An azeotrope or a constant boiling point mixture is a mixture that has the same composition in liquid and vapour phase.[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{!}}}}}[/tex]
2 NaOH + H2SO4 2 H2O + Na2S04
a. How many grams of sodium sulfate will be formed if you start with 300 grams of sodium
hydroxide?
Answer:
532.5 grams
Explanation:
The balanced chemical equation of this reaction is as follows:
2NaOH + H2SO4 → 2H2O + Na2S04
From the above balanced equation, it shows that 2 moles of sodium hydroxide (NaOH) produces 1 mole of sodium sulfate (Na2SO4).
Using mole = mass/molar mass to convert mass to mole
Molar mass of NaOH = 23 + 1 + 16 = 40g/mol
mole = 300/40
mole = 7.5moles of NaOH
Since 2 moles of sodium hydroxide (NaOH) produces 1 mole of sodium sulfate (Na2SO4).
Then, 7.5 moles of NaOH will produce 7.5/2 = 3.75moles of Na2SO4.
mole = mass/molar mass
Molar mass of Na2SO4 = 23(2) + 32 + 16(4)
= 46 + 32 + 64
= 142g/mol
Mass of Na2SO4 = 3.75 × 142
= 532.5g
How many grams of silver nitrate will be needed to produce 8.6 g of silver?
Answer:
13.5g of AgNO3 will be needed
Explanation:
Silver nitrate, AgNO3 contains 1 mole of silver, Ag, per mole of nitrate. To solve this problem we need to convert the mass of Ag to moles. Thee moles = Moles of AgNO3 we need. With the molar mass of AgNO3 we can find the needed mass:
Moles Ag-Molar mass: 107.8682g/mol-
8.6g * (1mol / 107.8682g) = 0.0797 moles Ag = Moles AgNO3
Mass AgNO3 -Molar mass: 169.87g/mol-
0.0797 moles Ag * (169.87g/mol) =
13.5g of AgNO3 will be neededSelect the correct answer.
What does the empirical formula of a compound describe?
Ο Α. .
the type and number of atoms
OB.
the type and ratio of atoms
O C.
the number of atoms
OD
the type and mass of atoms
Reset
Next
Answer:
b
Explanation:
cause empirical formular is the elementary or the foundation for molecular formula and molecular formula depends on the empirical formula
what is the digiMelt Start Temp and the digiMelt Stop Temp for Formic Acid Acetic Acid Propionic Acid
Explanation:
Melting is defined as the physical process where a solid state of a substance converts into its liquid state. No change of chemical composition takes place, just the physical state of water is changing.
[tex]\text{Solid}\rightleftharpoons \text{Liquid}[/tex]
There are given carboxylic acids. The melting point of these acids increases to its second group member which is ethanoic acid due to prevalent hydrogen bonding. To break this bonding, a high amount of heat needs to be applied.
But as we move forward, the melting point decreases sharply as an increase in the number of carbon atoms decreases the hydrogen bonding.
Melting point of Formic Acid = [tex]8.3^oC[/tex]
Melting point of Acetic Acid = [tex]16.6^oC[/tex]
Melting point of Propionic Acid = [tex]-21^oC[/tex]
If the pH of a solution is 3, its pOH is
Explanation:
If the pH of a solution is 3, its pOH is 14-3= 11
How many grams are in 2.000 moles of Cl2
Answer:
141.8g
Explanation:
because n(cl)=m(cl)/M(cl)
Use the reaction N2(g) + 3H2(g) 2NH3(g) to answer the following questions
a. 1 pt: What does Le Châtelier's principle predict would happen to the equilibrium conditions if N2(g) + 3H2(g) were added to the system?
b. 1 pt: What would happen to the equilibrium if the pressure were decreased?
c. 2 pts: Write the equation for calculating Keq
d. 3 pts: Calculate the value for Keq given the following concentrations
[NH3] = 6 M
[H2] = 4 M
[N2] = 3 M
Answer:
K
C
=
[N
2
][H
2
]
3
[NH
3
]
2
N
2
+3H
2
⇌2NH
3
=
(1.5×10
−2
)(3×10
−2
)
3
(1.2×10
−2
)
2
=
1.5×10
−2
×27×10
−6
1.44×10
−4
=
40.5×10
−4
1.44
=0.035×10
4
mention two examples each of solid liquid and gaseous Alkanes
Answer:
gas ; methane , ethane
liquid ; octane , hexane
Explanation;
i cant find solid dear
pls help anyone with an example of a solid alkanes
Given the reaction:
Ca + 2H,0→ Ca(OH)) + H2
How many moles of H,O are needed to exactly react with
2.0 moles of Ca
Answer:
4
Explanation:
because use the molar ratio of
ca:h2o
1:2
2;4
so u times it by 2 .
hope this helps:)
How many liters of hydrogen gas will be produced at STP from the reaction of 5.159 x 1021 atoms of magnesium with 55.23 g of phosphoric acid (H3PO4)?
3 Mg + 2 H3(PO4) Mg3(PO4)2 + 3 H2
Answer:
0.190L of hydrogen may be produced by the reaction.
Explanation:
Our reaction is:
3Mg + 2H₃PO₄ → Mg₃(PO₄)₂ + 3H₂
We need to determine the limting reactant. Let's find out the moles of each:
5.159×10²¹ atoms . 1 mol / 6.02×10²³ atoms = 0.00857 moles of Mg
55.23 g . 1 mol / 97.97 g = 0.563 moles of acid
2 moles of acid react to 3 moles of Mg
0.563 moles of acid may react to: (0.563 . 3) /2 = 0.8445 moles of Mg
Definetely the limting reactant is Mg.
As ratio is 3:3, 3 moles of Mg can produce 3 moles of hydrogen
Then, 0.00857 moles of Mg must produce 0.00857 moles of H₂
At STP, 1 mol of any gas occupies 22.4L
0.00857 mol . 22.4L / 1mol = 0.190L
In the titration of a solution of Sodium hydroxide, an acid titrant was prepared by diluting 125.0 mL of 10.00 mol/L Nitric acid into enough distilled water to make 500.0 mL of solution. 30.0 mL of the base was measured, and in the titration, 16.74 mL of the acid titrant was needed to neutralize. Determine the concentration of the Sodium hydroxide.
Answer:
1.395M NaOH
Explanation:
Sodium hydroxide, NaOH, reacts with nitric acid, HNO3, as follows:
NaOH + HNO3 → NaNO3 + H2O
Where 1mol of NaOH reacts with 1mol of HNO3
To solve this question we must find the concentration of the titrant. With the concentration and the needed acid we can find the moles of HNO3 added = moles NaOH in the solution. With the moles of NaOH and its volume we can find its concentration as follows:
HNO3 concentration:
10.00mol/L HNO3 * (125.0mL/500.0mL) = 2.500M HNO3
Moles HNO3 = Moles NaOH:
16.74mL = 0.01674L*(2.500mol/L) = 0.04185 moles HNO3 = Moles NaOH
Concentration NaOH:
0.04185 moles / 0.0300L =
1.395M NaOH
how many moles are in 150 grams of water
Answer:
Solution given:
H20=1+1+16=18grams
we have
1 mole of water =18grams
now
150grams of water=1/18*150=25/3 =8.33mole.
150 grams of water =8.33mole.
Note:
mole =given mass/actual mass of molecule/atom
1 mole of water is 18 grams.
Then,
150 grams of water,
→ 1/18 × 150
→ 25/3
→ 8.33333 . . .
Hence, 150 grams of water is 8.3 moles.
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Which property of water helps it maintain a relatively stable temperature?
The property of water that helps it maintain a relatively stable temperature is the presence of hydrogen bonds.
The properties of waterWater is an odourless, tasteless and colourless compound that is made up of hydrogen and oxygen atoms.
The properties of water include the following:
it is a polar solvent,it has high specific heat capacityHigh surface tension, andStable boiling and freezing points.The stable temperature of water, that is the ability to have a constant boiling and freezing points, is as a result of the hydrogen bonds existing between the water molecules.
The hydrogen bonds gives water molecules ability to hold heat better than any other substance.
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Answer: High specific heat capacity
Explanation:
I took the test
Plutonium-196 has an atomic number of 78. It has ____ neutrons.
Answer:
118 neutrons
Explanation:
There are three subatomic particles in an atom namely: electron, neutron and proton. The mass number of an atom is calculated by adding the proton no. (atomic mass) + neutron no.
That is;
Mass no. = proton no. + neutron no.
This means that to obtain the neutron no. in the atom of an element, we subtract the no of protons or atomic mass from the mass number.
According to this question, Plutonium-196 is said to have an atomic number of 78. The mass no. is 196, hence, the number of neutrons is:
196 - 78
= 118 neutrons.
The word habitable is defined as: