The molecular mass of nicotine is 162.1 grams. Nicotine contains 74.0% carbon, 8.7% hydrogen, and 17.3% nitrogen. Determine it's molecular formula.
A). C10H14N2
B). C6H8N4
C). C5H7N
D). C3H6N
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Answer:D). C3H6N
Explanation:applesause
To make a 4.00 M solution, how many moles of solute will be needed if 12.0 liters of solution are required?
Answer:
To make a 4.00 M solution, 48 moles of solute will be needed if 12.0 liters of solution are required.
Explanation:
Molar concentration or molarity is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species.
Molarity is defined as the number of moles of solute that are dissolved in a given volume. Then it is calculated as the quotient between the number of moles of solute and the volume of solution:
[tex]Molarity= \frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}=M[/tex].
In this case:
Molarity= 4 Mnumbre of moles of solute= ?volume= 12 litersReplacing:
[tex]4 M= \frac{number of moles of solute}{12 liters}[/tex]
Solving:
4 M*12 liters= number of moles of solute
48 moles= number of moles of solute
To make a 4.00 M solution, 48 moles of solute will be needed if 12.0 liters of solution are required.
How many ml are in 3,764liters?
Hint: ‘mili’ means a thousandth (1/1,000)
Round your answer to the nearest whole number
Answer:
Your answer I think would be 3,764,000 .If Im wrong please correct me and comment below.
I got my answer by converting 3,764 liters to millileters using a converter calculator
then I rounded it to the nearest whole number using the rounding calculator from calculator soup. This has worked for me in the past.
Hope this helps, good luck!
What is the mole fraction of each component of a gas mixture that contains sulfur trioxide at a pressure of 1.45 atm and sulfur dioxide at a pressure of .32 atm
Answer:
[tex]x_{SO_3}=0.82\\\\x_{SO_2} =0.18\\[/tex]
Explanation:
Hello there!
In this case, according to the given information, it is possible for us to solve this problem by using the Dalton's law which allows us to calculate the mole fractions by dividing the partial pressures over the total pressure. In such a way, we plug in the given pressures of sulfur trioxide (SO3) and sulfur dioxide (SO2) to obtain:
[tex]x_{SO_3}=\frac{1.45atm}{1.45atm+0.32atm} =0.82\\\\x_{SO_2}=\frac{0.32atm}{1.45atm+0.32atm} =0.18\\[/tex]
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The limiting reactant is...
A). The reactant that produces the least amount of product
or B). The reactant that produces the most amount of product
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Answer:
A.) produces the least amount of product.
If methane gas was kept in a 3.00 L container at STP, what would the pressure
be at 3.2 L?
Given
P1 = 1 Atm ( at stp)
V1 = 3.00 L
V2 = 3.20 L
P2 = ?
We know that,
at constant temperature
P1V1 = P2V2
1 × 3 = 3.2 × P2
P2 = 3/3.2
P2 = 0.9375 Atm
pressure at 3.2 L is 0.9375 Atm.
SEP Analyze Data Look at the phase diagram. What is the state of matter for methanol at a temperature of −0.1°C and a pressure of 2.5 atm?
How many grams of chlorine would exert a pressure of 610 torr in a 3.26-liter container at standard temperature? 4.25gCL
Answer:
[tex]m=8.28gCl_2[/tex]
Explanation:
Hello there!
In this case, according to the given information, it possible for us to realize that this problem is solved via the ideal gas equation:
[tex]PV=nRT[/tex]
By which we solve for the moles of chlorine gas as shown below:
[tex]n=\frac{PV}{RT}[/tex]
Next, we plug in the given pressure (in atm), the volume and standard pressure (273.15K) to obtain:
[tex]n=\frac{610/760atm*3.26L}{0.08206\frac{atm*L}{mol*K}*273.15K}\\\\n=0.117molCl_2[/tex]
Then, since the molar mass of chlorine gas (Cl2) is 70.9 g/mol, the mass of this gas turns out to be:
[tex]m=0.117molCl_2*\frac{70.9gCl_2}{1molCl_2} \\\\m=8.28gCl_2[/tex]
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What is the mass of 6.40 moles of copper(II)chloride (CuCl2)?
Answer:
860. g CuCl₂
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableCompoundsMolesStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
[Given] 6.40 mol CuCl₂
[Solve] g CuCl₂
Step 2: Identify Conversions
[PT] Molar Mass of Cu: 63.55 g/mol
[PT] Molar Mass of Cl: 35.45 g/mol
Molar Mass of CuCl₂: 63.55 + 2(35.45) = 134.45 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 6.40 \ mol \ CuCl_2(\frac{134.45 \ g \ CuCl_2}{1 \ mol \ CuCl_2})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 860.48 \ g \ CuCl_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
860.48 g CuCl₂ ≈ 860. g CuCl₂
Explain how the connotations of the bolded words in each sentence impact the meaning being conveyed.
Answer:
Find the explanation below.
Explanation:
Sentence A: In sentence A, the bolded words create a positive undertone to the entire meaning of the text. Words such as unimaginable accomplishment, stunning, and fascinated produce a pleasing and heartening mood. They make it clearer to the reader that this action by the scientists elicited a favorable response from the viewers.
Sentence B: In sentence B, there is a negative undertone to the text. The use of descriptors such as shocking, recklessly, alarmed, tells the reader of the unfavorable response the action of the scientists produced in the viewers. A gloomy mood is thus created.
What’s the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen?
How many grams of Sulfuric Acid are needed to produce 57.18 g of Lead (IV) Sulfate when being neutralized by a sufficient amount of Lead (IV) Hydroxide? *
Answer:
40.72g of sulfuric acid are needed
Explanation:
When sulfuric acid, H₂SO₄, is neutralized by lead (IV) hydroxide, Pb(OH)₄, Lead (IV) sulfate, Pb(SO₄)₂ and water as follows:
2 H₂SO₄ + Pb(OH)₄ → Pb(SO₄)₂ + 4H₂O
To solve this question we must find the moles of 57.18g of Pb(SO₄)₂. As 2 moles of H₂SO₄ produce 1mol Pb(SO₄)₂ we can find the moles of H₂SO₄ and its mass as follows:
Moles Pb(SO₄)₂ -Molar mass: 275.23 g/mol-
57.18g * (1mol / 275.23g) = 0.2078 moles Pb(SO₄)₂
Moles H₂SO₄:
0.2078 moles Pb(SO₄)₂ * (2mol H₂SO₄ / 1mol Pb(SO₄)₂) = 0.4155 moles H₂SO₄
Mass H₂SO₄ -Molar mass: 98g/mol-
0.4155 moles H₂SO₄ * (98g / mol) =
40.72g of sulfuric acid are neededPLEASE ANSWER ASAP!!!!! 50 points! :
You have an aquarium with a volume of 100 liters. The tank is generally used to hold water. This tank, however, is filled with fine sand. You also have measuring spoons, the smallest of which holds a volume of 1 milliliter. How can you use one or more measuring spoons to count the grains of sand in the aquarium? Write your ideas for counting the sand grains using the measuring spoon. Decide if the idea would lead to an exact count or an estimate. Suggest how you could improve your ideas. What assumptions are necessary for your procedure for counting sand grains to be reasonable? Explain your reasoning. How does your method of counting a large volume of sand grains compare to the task of counting atoms in a sample of matter?
Answer:
first, find the density of sand grains by using a small weighing scale. put at least 10 measuring spoons of sand on the scale. calculate the density by its formula d = m/v. this result can count the volume whole sand grains based on its weights
You can count the grains of sand ( estimated value ) by ; determining an estimate of the density and mass of the sand grains in the aquarium.
Since the volume of the tank = volume of the sand therefore the volume of the sand grains in the aquarium will be 100 liters, next is to determine the mass of the sand grains by using a weighing scale to take the mass of at least 20 measuring spoons of sand.
Find the density of the sand grains using the formula for determining, Density = mass / volume . with this result, We can determine an estimate of the number of sand grains with results gotten from the density and mass of the sand grains
To determine the number of atoms in a sample matter we also determine the mass and density of the matter just as with the counting of sand grains in the tank. which we can then use to determine an estimate of the number of atoms contained in the matter.
Hence we can conclude that you can count the grains of sand ( estimated value ) by; determining the density and mass of the sand grains in the aquarium.
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0.378g grams of a compound is made up of 0.273g of Mg and 0.105g nitrogen. Find its empirical formula.
Answer:
The empirical formula of the compound is [tex]Mg_3N_2[/tex].
Explanation:
Mass of magnesium in compound = 0.273 g
Mass of nitrogen in the compound = 0.105 g
Moles of magnesium =[tex]\frac{0.273 g}{24.305 g/mol}=0.0112 mol[/tex]
Moles of nitrogen = [tex]\frac{0.105 g}{14.0067 g/mol}=0.00750 mol[/tex]
Form empirical formula divides the lowest value of moles of an element present with all the moles of elements present.
Magnesium [tex]=\frac{0.0112 mol}{0.00750 mol}=1.5[/tex]
Nitrogen [tex]=\frac{0.00750mol}{0.00750 mol}=1[/tex]
The empirical formula of a compound:
[tex]Mg_{1.5}N_1=Mg_{\frac{15}{10}}N_1=Mg_{15}N_{10}=Mg_3N_2[/tex]
The empirical formula of the compound is [tex]Mg_3N_2[/tex].
Which of the following is not a natural resource?
A
wind energy
B
wood from trees
С
copper
D
computers
Answer:
computers
Explanation:
Select all that apply.
When the products of a reaction have less energy than the reactants:
The reaction is exothermic.
The reaction is endothermic.
The reactants lost internal energy.
The change in enthalpy is positive.
Answer:
The reaction is endothermic
Explanation:
we know that the reactants had to get energy from its surroundings which means that the reaction is endothermic
Please help and thank you
Answer:
C
Explanation:
This is a chemical reaction, because only the electrons were rearranged
two copper electrodes dipped in copper sulphate solution are connected to the end of the battery marked with a ''_'' is:
a) anion
b) cathode
c) anode
d) cation
plz I need the answer asap
Answer:
d) catión
Explanation:
Two copper electrodes dipped in copper sulphate solution are connected to the end of the battery marked with a is a cation. Hence, option D is correct.
What are electrodes?An electrode is a conductor of electricity that can carry electric current into non-metals and other poor conductors of electricity.
The process is called electrolysis, and the two wires or plates dipping into the electrolyte are called electrodes.
The electrode which is connected to the positive terminal of the cell or battery is called the anode.
The electrode which is connected to the negative terminal of the battery is called the cathode.
Hence, option D is correct.
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which of the following does NOT cause the
urban heat island effect
Answer:
what are the options?
Explanation:
In an ecosystem the urban heat island effect is caused by construction of tall buildings and concrete roads.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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Which of the following characteristics describes an acid? (Aks 4b)
Answer:
B: turns litmus red
Explanation:
Looking at the given options;
An acid tastes sour and not bitter and so option A is not correct.
Acid turns blue litmus paper red and not any litmus paper. Thus option B is correct.
Acid has a PH < 7. Thus option C is not correct.
An acid feels just wet while it is a base that feels slippery to touch. Option D is not correct.
Help I need a answer on question 18 and I only got 10 minutes
Answer:
5 degrees
Explanation:
I think I might be wrong id k
Vhat is thermal energy?
the average overall volume of a system
the total number of molecules in a system
the kinetic energy of particles in a system
the measure of temperature in a system
Mass is a measure of how much matter something has.
False
True
Answer:
true
Explanation:
Let's say you are sanding a rough board to make shelves for you bedroom. What type of weathering would this be? How do you know?
Answer:
Physical or Mechanical weathering.
Explanation:
The sanding is a physical transformation of the rough board to make shelves for the bedroom and thus includes wear and tear of the wood in order to make the set. Hence the process includes grinding, polishing and smoothing the surface to make it usable.Nigeria experiences several more hours of daylight in summer than in winter. Which statement helps explain this observation?
Answer:
Earth is tilted on its axis
Explanation:
Whenever Earth is tilted on its axis, the tilt of the earth's rotational axis causes Nigeria to have longer days in the summertime, beginning in June, compared to the winter period. The tilting of the earth also causes Nigeria to experience longer nights in the winter.
The earth’s axis of rotation is tilted at an angle of 23.5 degrees compared to the earth's orbital plane. Such tilting of the earth is what causes Nigeria to experience longer hours during the day in the summer when the Northern Hemisphere is titled toward the sun starting around June 20 or 21.
An empty beaker weighs 20g and when filled with kerosene weighs 60g. If the volume of the kerosene is 15cm3, calculate the density of the kerosene
Answer:
2.7 g/cm³
Explanation:
Step 1: Calculate the mass of kerosene
The mass of the full beaker (mFB) is equal to the sum of the masses of the empty beaker (mEB) and the mass of the kerosene (mK).
mFB = mEB + mK
mK = mFB - mEB
mK = 60 g - 20 g = 40 g
Step 2: Calculate the density of kerosene
Density (ρ) is an intrinsic property of matter. It can be calculated as the quotient between the mass of kerosene and its volume.
ρ = m/V
ρ = 40 g/15 cm³ = 2.7 g/cm³
What would make oppositely charged objects attract each other more?
increasing the positive charge of the positively charged object and increasing the negative charge of the negatively
charged object
decreasing the positive charge of the positively charged object and decreasing the negative charge of the negatively
charged object
increasing the distance between the positively charged object and the negatively charged object
maintaining the distance between the positively charged object and the negatively charged object
Answer: increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object.
Explanation:
edge
Answer:
Your answer is A.
Explanation:
Describe how electromagnetic waves are formed and
travel through space.
Answer:
Electromagnetic waves are created by a charged particle that generates an electric field. The electric field creates a magnetic field. As the charged particle moves, the electric field and magnetic field keep changing, which causes the wave to move
Answer:
Electromagnetic waves are formed by charged particles which create an electric field. The electric field generates a magnetic field. As the particle moves, the electric field changes, which causes the magnetic field to change.
Explanation:
Edge, 2022.
A rocket travels in a straight line at a speed of 5,000 m/s. After 60 seconds, it is 10,000 m/s. What is the rocket’s acceleration?
Answer:
83.33 m/s^2
Explanation:
Acceleration is defined as the rate of change of velocity.
So if we know that at the beginning an object has a velocity V1.
And after a time T, the object has a velocity V2, then the average acceleration in that time interval can be calculated as:
A = (V2 - V1)/T
In this case, we know that the initial speed was 5,000 m/s
And after a time of 60 s, the velocity is 10,000 m/s
Then we have:
V1 = 5,000 m/s
T = 60s
V2 = 10,000 m/s
Then the average acceleration is:
A = (10,000 m/s - 5,000 m/s)/60s = 83.33 m/s^2
what are some non living factors that you need in a habitat?
Answer:
You depend on each other and need the nonliving things in your home, like food, water, air, and furniture. Living things need nonliving things to survive. Without food, water, and air, living things die. Sunlight, shelter, and soil are also important for living things.
Explanation: i dunno if this is right or not ;-; but i tried UnU