Answer:
B
Explanation:
Bolt can run at a top speed of 28 mph.
. What is the molarity of a 0.5 liter solution containing 0.7 moles of NaCl?
Answer:
M = 1.4 M
Explanation:
Hello there!
In this case, according to the given information, it will be possible for us to calculate the required molarity according to its definition:
[tex]M=\frac{n}{V}[/tex]
Whereas the n is mole and has a value of 0.7 mol, V the volume in liters, which is 0.5 L; therefore, the result is:
[tex]M=\frac{0.7mol}{0.5L} \\\\M=1.4 M[/tex]
Regards!
Why is one side of the moon called "the dark side of the moon"?
O A. The moon's rotation and revolution take the same time.
B. The moon's rotation time is exactly twice the time of its revolution.
Ο Ο
C. The moon's rotation time is exactly half the time of its revolution.
IT due tomorrow Giving Brianliest!!!!!
This is not a eassy!!!!!
explain the process of finishing
Answer:
[Your answer would be in this document of mine below] Thanks :D
Explanation:
convert 113 Fahrenheit to celcius do full process
[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]
45° Celsius
Formula (113°F − 32) × 5/9 = 45°C
ThanksHope it helpsHow many liters of phosphine are produced when 34 L of hydrogen reacts with an excess of phosphorus under STP?
Answer:
22.67 L of PH₃
Explanation:
The balanced equation is:
[tex]P_4 (s) + 6H_2(g) \to 4PH_3(g)[/tex]
From the equation:
[tex]34 L \times \dfrac{1 \ mol \ of H_2 }{22.4 \ L \ H_2} \times \dfrac{4 \ mol \ of \ PH_3}{6 \ mol \ H_2} \times \dfrac{22.4 \ L \ PH_3}{1 \ mol \ PH_3}[/tex]
= 22.67 L of PH₃
Which of the following is an example
of a chemical property?
A. Iron has a tendency to rust.
B. The boiling point of water is 100°C.
C. Salt will dissolve in water.
D. Chlorine does not conduct
electricity
Answer:
Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion.
What type of compound is a salt
Answer: Salt is an ionic compound.
Explanation:
A compound formed by transfer of electrons from one atom to another is called an ionic compound.
For example, chemical formula of salt is NaCl (also called table salt).
Salt is formed when sodium (atomic no. 11) donates its one valence electron to chlorine (atomic no. 17). As a result, sodium ion and chlorine ion chemically combine together and form the compound NaCl.
Thus, we can conclude that salt is an ionic compound.
Can someone please help me
Plants!
No doubt the answer is plants they are one maintaining the temperature, responsible for rains too...
If a 50.0 g piece of glass is heated from 20.0°C to 40.0°C, how many joules of heat are added? The specific heat of glass is 0.50 J/g°C.
Answer:
500J (joules)
Explanation:
since heat is is the product of mass, change in temperature, and specific heat, the solution can be found from the equation q = mcΔt, heat is 50 * .5 * 20 = 500J
In a nuclear equation:??
What molecule represents this structure
A)NH4
B)NH3
C)NH4+
D)NH3+
Explanation:
As I think Option C is correct i.e. NH4+.
QA49 (N13/13/Q9)
Use of the Data Booklet is relevant to this question.
When an evacuated fluorescent light tube of volume 300 cm^3 is filled with a gas at 300K and
101 kPa, the mass of the tube increases by 1.02g. The gas obeys the ideal gas equation
What is the identity of the gas?
A argon
B krypton
C neon
D nitrogen
- Standard state refers to
a) 1 atm and 25°C
b) 1 atm and 100°C
c) 1 atm and gaseous reactants
d) None of these
Answer: The standard state refers to 1 atm and [tex]25^{o}C[/tex].
Explanation:
It is known that a chemical/substance can either be present in a solid, liquid or gaseous state.
So, when the phase of a substance like solid, liquid or gas is present at 1 atmosphere pressure and at a temperature of [tex]25^{o}C[/tex] then it known as standard state of substance.
Thus, we can conclude that standard state refers to 1 atm and [tex]25^{o}C[/tex].
what it meant by executive mention the function of Executive
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Definition:-
The organ of government that primarily looks after the function of implementation and administration is called the executive.
Function:-
Executive is the branch of government responsible for the implementation of laws and policies adopted by the legislature.
ThanksHope it helps.Ethyne or acetylene can be hydrogenated to change from the triple bonded C2H2 to the double-bonded C2H4. Adding hydrogens in organic chemistry is called reduction. Adding and removing hydrogens are important steps in chemical manufacturing. Calculate the value of ΔS° for the catalytic hydrogenation of acetylene to ethene,
C2H2 (g) + H2 (g) --> C2H4 (g)
A. +18.6 J/mol K
B. -18.6 J/mol K
C. -112.0 J/mol K
D. +112.0 J/mol K
The correct answer is
C. -112.0 J/mol K
A gas has a pressure of 1.5 atm at 100K. If the pressure changes to 6 atm, what is the new temperature be?
Answer:
400k
Explanation:
volume is constant
P1/T1=P2/T2
1.5/100=6/T2
T2=(100×6)/1.5
T2=400k
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How can light from the sun cause skin cancer?
The sun is the source, and the change is damage
How many liters of chlorine are needed to produce 5.64 moles of aluminum chloride? Need help ASAP
Answer:
190 L
Explanation:
Given that:
Number of moles = mass/molar mass
number of moles = 5.64
molar mass of aluminum chloride = 133.34 g/mol
∴
The balanced equation is:
2 Al + 3 Cl2 --> 2AlCl3.
From above reaction:
5.64 mole of AlCl3 reacts with 3 mole Cl2 to give 2 mole AlCl3
i.e
[tex](5.64 \ mole \ AlCl3) \times (3 \ mole \ Cl2 \ / \ 2 \ mole \ AlCl3)[/tex]
= 8.46 mole Cl2 gas.
At Standard temperature and pressure:
= (22.4 L/1 mole gas) * (8.46 mole Cl2)
= 190 L chlorine gas
Ants live in the hollow thorns of an acacia tree. The tree provides food and shelter for the ants. The ants protect the tree from herbivores that might otherwise eat the tree.
Which type of relationship does this represent?
A. mutualism
B. parasitism
C. commensalism
D. predator/prey
Colligative properties of solutions include all of the following except: a. an increase in the osmotic pressure of a solution upon the addition of more solute b. elevation of the boiling point of a solution upon addition of a solute to a solvent c. an increase of reaction rate with increase in temperature d. depression of the freezing pont of a solution upon addition of a solute to a solvent e. depression of vapor pressure upon addition of a solute to a solvent
Answer:
Option C, an increase of reaction rate with increase in temperature
Explanation:
Colligative properties are as follows
a) Decrease of vapor pressure
b) Increase of boiling point
c) Reduction of freezing point
d) Increase of osmotic pressure
There is no impact on reaction rate and hence it is not a colligative property.
Thus, option c is the right choice
An increase of reaction rate with increase in temperature isn't an example
of colligative properties of solutions
Colligative properties of solutions depend on the ratio of the number of
solutes to that of the solvent(concentration) and not on the nature of the
substances involved.
Examples of colligative properties include vapor pressure lowering, boiling
point elevation, freezing point depression, and osmotic pressure. Increase of
reaction rate with increase in temperature is therefore not an example of
colligative properties of solutions.
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Calculate the maximum work available from 50.0 g of aluminum in the following cell when the cell potential is 1.15 V. Al(s) |Al3+(aq) || H+(aq) | O2(g) |Pt. Note that O2 is reduced to H2O.
Answer:
W = 615.91 kJ
Explanation:
We need to use the following expression:
W = ΔG° * mol (1)
But in order to determine the ΔG° we need the following expression:
ΔG° = -n * F * E° (2)
Where F is a constant and is 96,500 J/V mol
n is the number of transferred electrons in the reaction. As we are passing from Al to Al³⁺ we can say that the number of electrons are 3.
Finally to get the moles, we need the the atomic weight of aluminum which is 26.98 g/mol, so the moles:
moles = m/MM (3)
Let's calculate the moles of aluminum:
moles = 50 / 26.98 = 1.85 moles of aluminum
Now let's calculate the gibbs energy using (2):
ΔG° = -3 * 96,500 * 1.15
ΔG° = -332,925 J or simply -332.925 kJ/mol
Finally, using (1) we can determine the work done:
W = 332.925 * 1.85
W = 615.91 kJHope this helps
The maximum work available from 50.0 g of aluminum in the following cell when the cell potential is 1.15 V will be 615.91 kJ
What is cell potential ?The cell potential, Ecell, is the measure of the potential difference between two half cells in an electrochemical cell.
Expression for work done ;
W = ΔG° x mol (1)
But, to determine the ΔG°
ΔG° = -n x F x E° (2)
Where,
F is a constant and is 96,500 J/V moln is the number of transferred electrons in the reaction.(As there is variation from Al to Al³⁺ the change in number of electrons are 3)
To get the moles,
moles = m/MM (3)
moles = 50 / 26.98 = 1.85 moles of aluminum
Now,
ΔG° = -3 x 96,500 x 1.15
ΔG° = -332,925 J
= -332.925 kJ/mol
Now, using (1) we can determine the work done:
W = 332.925 x 1.85
W = 615.91 kJ
Hence, The maximum work available from 50.0 g of aluminum in the following cell when the cell potential is 1.15 V will be 615.91 kJ
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Use the nutrition label to answer the following questions.
16.How much energy is contained in
the six-cookie serving size
recommended on the label?
17.How much energy in joules is provided by eating
six cookies? (1 cal = 4.184 J; ALSO: 1 Calorie = 1
kilocalorie)
Answer:
six cookies?(1 cal _4.184 j; ALSO: 1 Calorie -1 kilocalorie)
There are two forms of glucose (alpha-glucose and beta-glucose) in equilibrium.These isomers can interconvert through amechanism called mutarotation.Draw the two possible chair conformations for alpha-glucose. Circle the more stable conformation and explain your reasoning.(Hint: For full credit(1) drawbonds that are parallel correctlyand (2) draw the equatorial bonds with the correct directionality). (6 points).
Answer:
Please find the solution in the attached file.
Explanation:
The two chairs of the confirmation of the alpha glucose were defined in the attached file.
1. What is the kinetic energy of a cow that has a mass of 1500 kg and is moving at 4
meters per second?
Answer:
12000j
mass=1500kg
velocity=4m/s
Kinetic Energy (K E) = 1/2 mv^2
=1/2*1500(4^2)
=1*750*16
=12000j
How many moles of nitrogen are required to produce 13.5 g of NH 3?
Answer:
number of moles of (N) = 0.794 moles
Explanation:
From the given information:
no of moles of nitrogen (N) = (unknown)???
mass of nitrogen = 13.5 g
molar mass of NH3 = 14 +( 1 × 3) = 17 g/mol
To calculate the no of moles of N, we have:
number of moles of (N) = mass of N/molar mass
number of moles of (N) = 13.5 g/17 g/mol
number of moles of (N) = 0.794 moles
which molecule is butene
Answer:
Option C is the answer
Butene, also called Butylene, 4 isomeric compound belonging to the series of olefinic hydrocarbons. The chemical formula is C4H8, option c is correct.
What are the 4 isomers of butene?Butene, also called Butylene, four isomeric Combinations belong to the series of olefinic hydrocarbons. The chemical formula is C4H8.
The isomeric forms are 1-butene, cis-2-butene, trans-2-butene, and isobutylene.
Thus, option "C" is correct. the chemical formula is C4H8.
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who am I? my number name has the same number of letters as me. I am number _____
Answer:
four
is the answer
THIS IS EASY3. If an item of trash is described as highly biodegradable, is that a physical property or
chemical property?.