Answers
Answer:
In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series, or any expression; it is usually a number, but may be any expression. In the latter case, the variables appearing in the coefficients are often called parameters, and must be clearly distinguished from the other variables.
Explanation:
Related Questions
In which direction will the electrons be pulled in the bond between hydrogen and chlorine?
toward the chlorine atom
toward both atoms equally
sometimes toward chlorine and sometimes toward hydrogen
toward the hydrogen atom
Answers
Answer:
toward the hydrogen atom
Explanation:
Answer:
toward the chlorine atom.
Explanation:
took the quiz and got it correct :)
Anything helps thank you
Answers
3 x 2 because double the C3N
what elements are in a carboxyl group
Answers
Carbon bonded to both an oxygen bonded to a hydrogen.
Hope it helped you out.
Plz Mark me brainiest and folow me if you like:)
How many moles of CO2 are there in 8.91 x 1023 molecules of CO2?
(1 mole= 6.02 x 1023)
Answers
Answer:
1.48 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{8.91 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{8.91}{6.02} \\ = 1.480066...[/tex]
We have the final answer as
1.48 molesHope this helps you
Justin drives to school heading about 3 miles north from home and then head east for 1.5 miles. it takes him 45 minutes to get to school. what was his average speed/velocity?
Answers
If Justin drives 3 miles north and 1.5 miles to the east to get to school and takes him 45 minutes, his average speed/velocity is 6 miles/hour north east.
Speed is the amount of distance traveled by an object per unit of time. On the other hand, velocity is the amount of speed and the direction it is moving. Speed is a scalar quantity while velocity is a vector quantity.
To get the speed of Justin driving from home to his school, divide the distance he traveled by the amount it took him.
speed = (3 miles + 1.5 miles) / 45 minutes(1hr/60 minutes)
speed = 6 miles/hour
Taking note of the direction he traveled, the velocity will be:
velocity = 6 miles/hour north east
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3. Which term is defined as "anything that has mass and occuples space"?
Answers
Answer:
matter
Explanation:
All physical 'stuff'
Answer:
matter
Explanation:
Matter is anything that has mass and occupies space .
Fossil fuel is the best use of energy.
T
True
F
False
9 of 12
Answers
... I hope this helps
True
Answer:
True
Explanation:
Beacuse you use Fossil Fuels for gas and its oil as well
In the electronegativity periodic table down a place from left to right is it going to be the same as negative to positive
And also for the right side from down to up is it going to be negative at down and postive at the top?
Answers
Answer:
yes, you are correct
Explanation:
it increases upwards
When fertilization occurs one half of the DNA comes from the __________
and one half from the
_________
Answers
Answer:
Father - Mother
Sperm - Egg and those fertilized are called a Zygote
Explanation:
Answer:
one half from the father and the other half from the mother
Explanation:
hope it helps
14. Which of the following is produced when propane (C3H8) is combusted completely? (2 points)
H20
СО
O2
H2
Answers
The following is produced when propane (C₃H₈) is combusted completely : H₂O
Further explanationComplete combustion of Hydrocarbons with Oxygen will be obtained by CO₂ and H₂O compounds.
If O₂ is insufficient there will be incomplete combustion produced by CO and H and O
Hydrocarbon combustion reactions (especially alkanes) [tex]\large {\boxed {\bold {C_nH _ (_2_n _ + _ 2_) + \frac {3n + 1} {2} O_2 \Rightarrow nCO_2 + (n + 1) H_2O}}}[/tex]
For combustion of propane C₃H₈ (n = 3) ⇒ completely(excess O₂) :
C₃H₈+5O₂⇒3CO₂+4H₂O
The products of combustion : CO₂ and H₂O
You dissolve 8.65 grams of lead(II) nitrate in water, and then you add 2.50 grams of aluminum. This reaction occurs: 2Al(s) + 3Pb(NO3)2(aq) → 3Pb(s) + 2Al(NO3)3(aq). What’s the theoretical yield of solid lead? Use the ideal gas resource and the periodic table. A. 5.41 g B. 11.2 g C. 19.2 g D. 28.8 g Reset
Answers
Answer: A. 5.41
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} Al=\frac{2.50g}{27g/mol}=0.0926moles[/tex]
[tex]\text{Moles of} Pb(NO_3)_2=\frac{8.65g}{331g/mol}=0.0261moles[/tex]
[tex]2Al(s)+3Pb(NO_3)_2(aq)\rightarrow 3Pb(s)+2Al(NO_3)_3(aq)[/tex]
According to stoichiometry :
3 moles of [tex]Pb(NO_3)_2[/tex] require = 2 moles of [tex]Al[/tex]
Thus 0.0261 moles of [tex]Pb(NO_3)_2[/tex] will require=[tex]\frac{2}{3}\times 0.0261=0.0174moles[/tex] of [tex]Al[/tex]
Thus [tex]Pb(NO_3)_2[/tex] is the limiting reagent as it limits the formation of product and [tex]Al[/tex] is the excess reagent.
As 3 moles of [tex]Pb(NO_3)_2[/tex] give = 3 moles of [tex]Pb[/tex]
Thus 0.0261 moles of [tex]Pb(NO_3)_2[/tex] give =[tex]\frac{3}{3}\times 0.0261=0.0261 moles[/tex] of [tex]Pb[/tex]
Mass of [tex]Pb=moles\times {\text {Molar mass}}=0.0261moles\times 207g/mol=5.41g[/tex]
Thus 5.41 g of solid lead will be produced from the given masses of both reactants.
Compounds are made up of different kinds of atoms that are chemically combined. What do compounds have in common? A. They have the same color. B. They have the same melting point. C. They can be broken down into simpler substances. D. They cannot combine with one another to form more complex substances.
Answers
Answer:
D
Explanation:
They cannot combine with one another to form more complex substances. that's the answer
The compounds have in common is they cannot combine with one another to form more complex substances. The correct option is D.
What are compounds?Compounds are the substances made up of numerous similar molecules made up of atoms from different elements and kept together by chemical bonds. Therefore, a molecule made up of only one type of atom is not a compound.
There are different types of compounds that are made by combining of different substances. Like, ionic compounds are made by combining metals and non-metals.
Compounds are the substance that can into form further complex substance by combining with another substance because they are already made up of two or more substance.
Thus, the correct option is D. They cannot combine with one another to form more complex substances.
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Calcium carbonate forms limestone, one of the most common rocks on Earth. It also forms stalactites, stalagmites, and many other types of formations found in caves. When calcium carbonate (CaCO3) is heated, it decomposes to form solid calcium oxide and carbon dioxide gas. Write the balanced equation and calculate how many liters of carbon dioxide will be produced at STP if 2.38 g of calcium carbonate reacts completely?
Answers
Answer: [tex]CaCO_3(s)\rightarrow CaO(s)+CO_2(g)[/tex] , 0.533 L
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
[tex]CaCO_3(s)\rightarrow CaO(s)+CO_2(g)[/tex]
According to avogadro's law, 1 mole of every substance occupies 22.4 L of volume at STP.
Number of moles =[tex]\frac{\text {given mass}}{\text {Molar mass}}[/tex]
moles of calcium carbonate = [tex]\frac{2.38g}{100g/mol}=0.0238mol[/tex]
As 1 mole of calcium carbonate produces = 22.4 L of carbon dioxide at STP
Thus 0.0238 moles of calcium carbonate produces =[tex]\frac{22.4 L}{1}\times 0.0238=0.533L[/tex] of carbon dioxide at STP
The balanced equation is [tex]CaCO_3(s) \rightarrow CaO(s) + CO_2(g)[/tex]
The number of liters of carbon dioxide that should be produced is 0.533L
Law of conversation of mass:As per this law, the mass could neither be developed nor be destroyed. So, the mass of products should be equivalent to the mass of reactants. The number of atoms of every element has to be the similar on reactant and product sides. Due to this, the chemical equations are balanced.
[tex]CaCO_3(s) \rightarrow CaO(s) + CO_2(g)[/tex]
Avogadro's law:As per this law, 1 mole of every substance occupies 22.4 L of volume at STP.
So,
We know that
Number of moles = [tex]given\ mass \div molar\ mass[/tex]
Now the moles of calcium carbonate is [tex]= 2.38 \div 100[/tex] = 0.0238 mol
Since 1 mole of calcium carbonate generated = 22.4 L of carbon dioxide at STP
So, 0.0238 moles of calcium carbonate generated
[tex]= 22.4 \div 1 \times 0.0238 \\\\= 0.533L[/tex]
of carbon dioxide at STP
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you have a container filled with 41 moles of neutral lithium. how much negative electric charge is contained in the electrons of all the lithium atoms in the container?
Answers
There are 7.407 x 10 25 electrons inside the container filled with 41 moles of neutral lithium.
Lithium is an element with an atomic number of 3. Since it has a neutral charge, the atomic number would be equal to subatomic particles proton and electron. Therefore, there 3 electrons in neutral lithium.
To solve for the number of electrons in a given number of moles of lithium, we are going to be using Avogadro's number to determine the number of lithium atoms present in the container.
Avogadro's number is the number of units, which could either be atoms, molecules, or particles, per mole of a substance and is equal to 6.02214076 x 10 23 units/mol.
(41 mol lithium)*(6.02214076 x 10 23 atoms/mol)*( 3 electrons/atom)
= 7.407 x 10 25 electrons
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how many moles are in 3.4 x 10^23 molecules of carbon dioxide CO2
Answers
3.4x10^23/6.02x10^23 = .565
Rounded to the thousandths
In addition to having a blue color what other characteristic do Neptune and Uranus share??
no rings
27 moons
no axis tilt
cold temperatures. HELP ASP
Answers
Answer:
d
Explanation:
it just makes sense
Answer:
Cold temperatures!
Explanation:
Both planets are very far from the sun, now to explain how the other answers would fit or just dont make sense, No rings, the answer isn't the best fitting answer for this question, 27 moons, this is wrong because neptune has 14 moons, only uranus has 27. No axis tilt, this answer is wrong because both planets have an axis.
PLEASE ANSWER “Tessa uses a toy slingshot to launch a tennis ball across the park for her dog to fetch. For her first launch, she
uses 100 N of force. Her second launch uses 200 N of force, and her third launch uses 300 N. Which launch had
the greatest acceleration of the tennis ball?”
Answers
The third launch ( with 300 N force) had the greatest acceleration of the tennis ball
Further explanationNewton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object
∑F = m. a
[tex]\large{\boxed{\bold{a=\frac{\sum F}{m}}}[/tex]
F = force, N
m = mass = kg
a = acceleration due to gravity, m / s²
From the above equation it has been shown that the force acting on the object is directly proportional to its acceleration, so the greater the force exerted on the object, the greater the acceleration of the object produced.
ammonium phosphate is an important ingredient in many fertilizers. it can be made by reacting phosphoric acid with ammonia . what mass of ammonium phosphate is produced by the reaction of of phosphoric acid? round your answer to significant digits.
Answers
7.5 g of ammonium phosphate is produced by the reaction of 4.9 g phosphoric acid.
What is Stoichiometry ?Stoichiometry helps us use the balanced chemical equation to measures quantitative relationships and it is to calculate the amount of products and reactants that are given in a reaction.
How to find number of moles ?To find number of moles use this expression
Number of moles = [tex]\frac{\text{Given Mass}}{\text{Molar Mass}}[/tex]
Given
Mass of H₃PO₄ = 4.9 g
Molar Mass of H₃PO₄ = 97.99 g/mol
Now,
Number of moles of H₃PO₄ = [tex]\frac{4.9\ g}{97.99\ \text{g/mol}}[/tex]
= 0.05001 mol
Now write the balanced chemical equation
H₃PO₄ + 3NH₃ → (NH₄)₃ PO₄
Molar Mass of (NH₄)₃ PO₄ = 149.1 g/mol
Mass of (NH₄)₃ PO₄ = No. of moles × Molar Mass
= 0.05001 mol × 149.1 g/mol
≈ 7.5 g
Thus from the above conclusion we can say that 7.5 g of ammonium phosphate is produced by the reaction of 4.9 g phosphoric acid.
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Question: Ammonium phosphate [(NH₄)₃ PO₄] is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid (H₃PO₄) with ammonia (NH₃). What mass of ammonium phosphate is produced by the reaction of 4.9 g phosphoric acid? Round your answer to significant digits.
(2S,3R)-2-Bromo-3-phenylbutane undergoes an E2 elimination when treated with sodium ethoxide. Draw all possible Newman projections for the bond relevant for the elimination reaction, and use those Newman projections to explain the stereochemical outcome of the reaction. Draw the final product and provide its IUPAC name.
Answers
Answer: (2S,3S)-2-Bromo-3-phenylbutane will undergo E2 reaction and form trans product of elimination due to its thermodynamic stability
Explanation:
write a balanced symbol equation for the complete combustion of butane
Answers
Write equilibrium constant (KC) for the following reactions
1. N2(g) + O2(g) ⇌ 2NO(g)
2. N2(g) + 3H2(g) ⇌ 2NH3(g)
3. 2SO2(s) + O2(g) ⇌ 3SO3(g)
4. 2Fe(S) + 4H2O(g) ⇌Fe3O4(s) +4H2(g)
Answers
The equilibrium constant(Kc) is equal to the concentration of the products over the concentration of the reactants, and each coefficient of the compound in an equilibrium state
Further explanationThe equilibrium constant or Kc is the value of the concentration product in the equilibrium state of the substance in the right segment divided by the product of the substance in the left section, each of which has a reaction coefficient raised
solid (s) and liquid (l) have no concentration, so these two phases are not involved in the equilibrium constant KC (given the value = 1).
The equilibrium constant based on concentration (Kc) in a reaction
pA + qB -----> mC + nD
[tex]\tt Kc=\dfrac{[C]^m[D]^n}{[A]^p[B]^q}[/tex]
1. N2(g) + O2(g) ⇌ 2NO(g)
[tex]\tt Kc=\dfrac{[NO]^2}{[N_2][O_2]}[/tex]
2. N2(g) + 3H2(g) ⇌ 2NH3(g)
[tex]\tt Kc=\dfrac{[NH_3]^2}{[N_2][H_2]^3}[/tex]
3. 2SO2(g) + O2(g) ⇌ 3SO3(g)
[tex]\tt Kc=\dfrac{[SO_3]^3}{[SO_2]^2[O_2]}[/tex]
4. 2Fe(S) + 4H2O(g) ⇌Fe3O4(s) +4H2(g)
[tex]\tt Kc=\dfrac{[H_2]^4}{[H_2O]^4}[/tex]
How do you find the volume of a plastic army soldier?
O Use a formula such as length x width x height
Look on the bottom of the army soldier's foot
O Place on a beam balance
Place in water and see how much the water is displace
Answers
Use the formula such as length x width x height, first, look on the bottom of the army soldier's foot.
What is plastic made of?Through a polymerization or polycondensation process, plastics are created from natural resources such cellulose, coal, natural gas, salt, and crude oil. Plastics are made from organic, naturally occurring substances including cellulose, coal, natural gas, salt, and, of course, crude oil.
Is plastic a solid or a liquid?A thermoset polymer cannot be melted and reshaped once it has been created, despite the fact that all plastics undergo liquid phase during processing and solid phase upon completion. A polymer can have a variety of arrangements for its monomers.
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A group of kids are playing a game of marbles. In the game of marbles, the kids take turns using a large marble, called the shooter, to hit smaller marbles outside of a circle, usually drawn in the dirt. How is the law of conservation of momentum demonstrated in this game?
Answers
Answer:
Explanation:
mjiio[mk'pk oikiom[,l
Answer:
The bigger marble may hold more momentum
Explanation:
The pressure on 2.50 L of gas is changed from 4.5 atm to 2.2 atm. What is the new volume of gas?
Answers
Answer:
5.11 LExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{2.5 \times 4.5}{2.2} = \frac{11.25}{2.2} \\ = 5.1136666...[/tex]
We have the final answer as
5.11 LHope this helps you
what is 2100 ÷ 35399 pleasss help me
Answers
Answer:
0.0593237097
Explanation:
7. DNA is essential to living organisms because it O is a spiral helix can prevent disease O carries the genetic code O can break apart
Answers
Answer: DNA is essential...because it carries the genetic code.
Explanation:
Although the other statements are true about DNA, it's a spiral helix and can break apart, its main function is that it contains the genetic code for organisms.
classify each change as physical or chemical. a balloon filled with hydrogen gas explodes upon contact with a spark. the liquid propane in a barbecue evaporates away because someone left the valve open. the liquid propane in a barbecue ignites upon contact with a spark. copper metal turns green on exposure to air and water.
Answers
Chemical: When a spark comes into touch with a hydrogen gas-filled balloon, the balloon explodes.
Because the user left the valve open, the liquid propane in a grill evaporates away, it is Physical.
Upon coming into touch with a spark, the liquid propane in a grill ignites. is Chemical
When copper metal is exposed to air and water, it turns green. it is chemical.
What is propane liquid?
Propane, also referred to as liquefied petroleum gas, or LPG, is a gas that is typically compressed and kept in liquid form. It is virtually odourless, harmless, and colourless; an identifying odour is added to make it detectable.
What is the shelf life of liquid propane?LPG has an infinite shelf life. The gas bottle itself is the only constraint. It might survive 20 years or longer if it is maintained and not allowed to corrode. Gas bottles normally need to be examined and refilled every 10 years, though you can use them for longer if it's safe to do so.learn more about liquid propane here
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A solution is classified as a weak base. Which of these could be the pH of the solution?
A)2
B)6
C)10
D)13
Answers
A solution that is classified as a weak base will have a pH of:
C)10
This can be find out y looking at the pH value see below.
What is pH?A solution can be identified in terms of acidity, basicity,and neutrality by known the pH of the solution.
If pH is below 7 than the solution is acidic.
If pH is above 7 than the solution is basic.
If the pH is 7, then the solution is neutral.
A strong base will have a pH in between 11-14.
A weak base will have a pH between 8-10.
Thus, option C is correct.
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PLEASE answer this Quick!! I have to submit this in a HOUR!!!!! -
Describe the relationship between the state of matter of water (gas, liquid, solid) and the motion of the water molecules
I Will give 30 POINTS!!
Answers
Answer:
Solid turns to liquid and liquid to gas
Explanation:
ice cube to water, water to carbon
What is the speed of light of an orange light with a wavelength of 600nm and a frequency of 5.00x1014?
Answers
Answer:
3 × 10^8 m/s
Explanation:
The wavelength, can be calculated by using the following formula;
λ = v/f
Where;
λ = wavelength (m)
v = velocity/speed of light (m/s)
f = frequency (Hz)
According to the provided information in this question, λ = 600nm i.e. 600 × 10^-9m, f = 5.00 x 10^14 Hz
Hence, using λ = v/f
v = λ × f
v = 600 × 10^-9 × 5.00 x 10^14
v = 6 × 10^-7 × 5.00 x 10^14
v = 30 × 10^(-7 + 14)
v = 30 × 10^ (7)
v = 3 × 10^8 m/s