Answer:
The answer is 56
Explanation:
i need points
find the number of hydrogen atoms of an alkyl group with 2 carbon atoms if n=2
Answer:
5
Explanation:
An alkyl group is a functional group that contains only hydrogen and carbon atoms. It has the general formula: CnH2n+1.
Since n=2, plug it into the formula.
C2H2(2)+1
=
C₂H₅
Hope that helps.
middle school science help please
Answer:
The answer is 'All of the above'
Explanation:
because the hydrogen ions are represented by the symbol H+, they increase the PH value of a solution if less amount is added but they decrease the PH value of a solution if a larger amount of hydrogen ions are added but still they increase the PH value, and of course, they contribute to a solution by a base.
Answer:
Hydrogen ions are represented by H+.
Explanation:
Hydrogen ions usually decreases the pH value when added to a solution.Hydrogen ions are contributed to a solution by a acid.4. Kendrick drags his bat out to play baseball. which statement best describes the science of what he did?
O Kendrick would use less energy if he dragged the bat faster.
Kendrick did not have to work to move the bat because he dragged it.
Kindrick gave the bat potential energy.
Kindrick gave the bat kinetic energy.
Explanation:
Kendrick gave the bat potential Energy
3. Using the solubility of ionic compounds table and/or the solubility rules,
list 3 substances that will NOT form a solution with water? (Hint:
identify substances that are insoluble with water)
How many grams are in 2.3 x 1024 formula units of KNO3?
390 g KNO₃
General Formulas and Concepts:ChemistryAtomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.MathPre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right Explanation:Step 1: Define
2.3 × 10²⁴ formula units KNO₃
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of K - 39.10 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of O - 16.00 g.mol
Molar Mass of KNO₃ - 39.10 + 14.01 + 3(16.00) = 101.11 g/mol
Step 3: Convert
[tex]2.3 \cdot 10^{24} \ formula \ units \ KNO_3(\frac{1 \ mol \ KNO_3}{6.022 \cdot 10^{23} \ formula \ units \ KNO_3} )(\frac{101.11 \ g \ KNO_3}{1 \ mol \ KNO_3} )[/tex] = 386.172 g KNO₃
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
386.172 g KNO₃ ≈ 390 g KNO₃
Please Help!
Your car has 1.95 gallons of gasoline (octane, d = 0.6916 g/mL), which reacts with oxygen
according to the balanced reaction below. Your car uses the energy produced by this reaction
at a rate of 115 kJ per second while traveling at a speed of 65 miles per hour. Calculate the
distance (in miles) the car can travel using this amount of octane.
2 C8H18(g) + 25 O2(g) -----> 16 CO2(g) + 18 H2O(g) ΔHrxn = -10,900 kJ
Answer:
38.3 miles
Explanation:
First, we convert 1.95 gallons to mililiters:
1.95 gallons * [tex]\frac{3.785 L}{1gallon}*\frac{1000mL}{1 L}[/tex]= 7380.75 mLThen we calculate how many grams of octane are available for the reaction, using its density:
0.6916 g/mL * 7380.75 mL = 5104.53 g C₈H₁₈Now we convert octane grams into octane moles, using its molar mass:
5104.53 g C₈H₁₈ ÷ 114 g/mol = 44.78 mol C₈H₁₈Then we calculate how many kJ are produced from the combustion of 44.78 mol C₈H₁₈, if 2 moles produce 10900 kJ:
44.78 mol * 10900 kJ / 2 mol = 244032 kJWe calculate how many seconds is the car available to keep going, if it spends 115 kJ per second:
244032 kJ * 1 s / 115 kJ = 2122.02 sWe convert seconds to hours:
2122.02 / 3600 = 0.59 hoursFinally we calculate the distance:
65 mi/hour * 0.59 hour = 38.3 miIf a system's internal energy increases by 250 kJ after the addition of375 kJ of energy as heat, what was the value ofthe work in the process?
(A) -625 kJ
(B) -125 kJ
(C) 125 kJ
(D) 625 kJ
Answer:
(B) -125 kJ
Explanation:
Going by the First Law of Thermodynamics it states that"
"A system can do work and increase it's internal energy provided we supply heat."
ΔU= q+w-----------1
where U= the internal heat
q= the quantity of heat added or removed from the system
w= the work done
Given
ΔU= 250kJ
q= 375kJ
from equation 1 make w subject of the formula we have
w= ΔU-q
w= 250-350
w= -125kJ
What temperature units
should be used when
performing calculations using
Charles's Law?
Answer:
Kelvin (K) onlyExplanation:
Kelvin is preferred for solving problems related to Charles' Law because , it is the Absolute temperature scale.
To convert Celsius to Kelvin scale, you add 273 to the temperature in the centigrade/Celsius scale.
what is the molecular formula of methanoic acid
Answer:
CH₂O₂
Mark me as brainliest plz.
Explanation:
CH2o2.is right ans hi I'm anmol kulkar from India
Converting benzoic acid to phenylmethanol
Answer:
The Conversion of Benzoic acid to Benzyl alcohol in presence of Potassium Permanganate is an oxidizing reaction where potassium permanganate is strong oxidizing agent.This reaction occurs in basic medium in presence of sodium carbonate.This reaction gives best yield in acidic medium.But it takes longer duration for reaction to complete as compared to basic medium.less duration is required which is necessary for laboratary scale
Which force keeps the planets from floating off into space?
Earth’s gravity
the Sun’s gravity
the moon’s gravity
Milky Way’s gravity
Answer:
Suns gravity
Explanation:
Answer: 2021
B
The Sun's gravity
Explanation: Just took the big test
Law of Universal Gravitation (what factors affect gravity and how?)
Explanation:
Hey there!
According to the law of gravitation, the factors that affects the gravity are:
Mass of the heavenly bodies.Distance from the centre of the body to next body.Mass of heavenly bodies:The mass of heavenly bodies affect the gravity. We know that gravity is directly proportional to the mass of heavenly bodies. so, when the mass is more there is more gravity and where there is less mass there is less gravity.
Distance from the centre of the body to next body: It is one of the factor to influence gravity. When there is more distance there is less gravity and where there is distance more force is there. Is means gravity is inversely proportional to the distance between the bodies.
Hope it helps...
Uncontrolled energy:
causes destruction
produces order
can make things
can do useful work
Answer:
causes destruction
Now, let's solve our problem using Boyle's Law:
A gas that exerts a pressure of 151 mm Hg in a
container with a volume of
L will exert a
pressure of 166 mm Hg when transferred to a
container with a volume of 0.532 L.
[?]L
Assume that the number of moles and the
temperature remain constant.
Answer:
V₁ = 0.585 L
Explanation:
Given data:
Initial pressure = 151 mmHg
Initial volume = ?
Final pressure = 166 mmHg
Final volume = 0.532 L
Solution:
The given problem will be solved through the Boyle's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
151 mmHg × V₁ = 166 mmHg × 0.532 L
V₁ = 166 mmHg × 0.532 L / 151 mmHg
V₁ = 88.312mmHg .L /151 mmHg
V₁ = 0.585 L
If I change the volume of a solution from 5.00 L to 10.0 L, what was the new
concentration if the original concentration was 4.0 M? Please help me as soon as possible with explanation.
The new concentration = 2 M
Further explanationDilution is a process of decreasing the concentration of a solution by adding a number of solvents
Can be formulated
M₁V₁=M₂V₂
M₁ = Initial Molarity
V₁ = Initial volume
M₂ = Final Molarity (after dilution)
V₂ = Final volume (after dilution)
V₁=5 L
V₂=10 L
M₁=4 M
The new concentration(M₂) :
[tex]\tt M_2=\dfrac{V_1.M_1}{V_2}\\\\M_2=\dfrac{5\times 4}{10}\\\\M_2=2~M[/tex]
HELP 20 POINTS
What is the frequency of an Electromagnetic wave has with wavelength 2.94 x 10^-8 cm?
Answer:
gccdfjjkjggffffgggggbbbhb
Describe the reaction of zinc with sulphuric acid
Answer:
Zinc reacts with dilute sulphuric acid to produce hydrogen gas (H2) and zinc sulphate. This is an example of displacement reaction of a non-metal by a metal. ... ZnSO4 is different in chemical composition and chemical properties than Zn and H2SO4 so it is a chemical change.
Answer:
Reaction of Zinc with Dilute Sulphuric Acid
Zinc is more reactive than hydrogen and it displaces hydrogen from dilute acids. Zinc reacts with dilute sulphuric acid to form zinc sulphate and hydrogen gas is evolved. This is a single displacement reaction of a non-metal by a metal. ... So, this reaction is a chemical change.
Help DUE MONDAY!!!
Dldm
Time to slide down : 2.4 s
Further explanationGiven
total length of slide = 12 m
Randy's speed = 5 m/s
Required
time to slide down
Solution
Randy's motion can be said to be a straight, regular motion at a constant speed
Can be formulated
d = v x t
d = distance, m
v = velocity, m / s
t = time, s
we plug in the known values in the formula
[tex]\tt t=\dfrac{d}{v}\\\\t=\dfrac{12~m}{5~m/s}\\\\t=2.4~s[/tex]
Which phrase describes one type of freshwater wetland?
2
acidic areas found in northern climates
reservoirs created by dams at the end of rivers
areas of high elevation that feed into river systems
small streams that flow into larger streams and wetlands
Answer:
The correct answer is D
Explanation:
Wetlands are environments that are either submerged under water or are frequently wet. Marshes, swamps, bogs, and fens are examples of freshwater wetlands. Here small streams flow into larger streams and wetlands. The correct option is D.
Ecosystems in freshwater wetlands are impacted by transient or ongoing flooding. They are essential habitats for fauna (including migratory species), play a significant role in the regulation of water flow and water quality to entire catchments, and offer shelter for fauna during droughts.
In tropical and subtropical areas, mangrove swamps are coastal wetlands. In brackish to saline tidal waters, they are distinguished by halophytic (salt-loving) trees, shrubs, and other plants.
Thus the correct option is D.
To know more about wetlands, visit;
https://brainly.com/question/11438518
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For the following reaction, calculate how many moles of each product are formed when 4.05 g of water is used.
2 H2O → 2 H2 +02
Answer:
A. 0.225 mole of H₂
B. 0.113 mole of O₂.
Explanation:
We'll begin by calculating the number of mole in 4.05 g of water (H₂O). This can be obtained as follow:
Mass of H₂O = 4.05 g
Molar mass of H₂O = (2×1) + 16 = 2 + 16 = 18 g/mol
Mole of H₂O =?
Mole = mass /Molar mass
Mole of H₂O = 4.05 / 18
Mole of H₂O = 0.225 mole
Next, the balanced equation.
2H₂O —> 2H₂ + O₂
From the balanced equation above,
2 moles of H₂O produced 2 moles of H₂ and 1 mole of O₂.
A. Determination of the number of mole hydrogen produced.
From the balanced equation above,
2 moles of H₂O produced 2 moles of H₂.
Therefore, 0.225 mole of H₂O will also produce 0.225 mole of H₂.
B. Determination of the number of mole oxygen produced.
From the balanced equation above,
2 moles of H₂O produced 1 mole of O₂.
Therefore, 0.225 mole of H₂O will produce = (0.225 × 1)/2 = 0.113 mole of O₂.
Thus, 0.113 mole of O₂ is produced.
Which is larger: barium atom or a barium ion? Explain your answer in terms of atomic structure
Heeellllpppp ASAP ......
Answer:
I saw B, he vented SUS
Explanation:
Iodoethane Is the answer.
Which is the noble gas configuration for 31 Ga?
Answer:
1s22s22p63s23p63d104s24p1.
Explanation:
Gallium, Ga has 31 protons and 31 electrons.
Answer:
Ar 3d10 4s2 4p1
Explanation:
hope this serves you well!!
A common carboxylic acid used in cooking is acetic acid, if its composed of two carbons whats its iupac name
Answer:
ethane
Explanation:
Ethane is an organic chemical compound with chemical formula C ₂H ₆. At standard temperature and pressure, ethane is a colorless, odorless gas. Like many hydrocarbons, ethane is isolated on an industrial scale from natural gas and as a petrochemical by-product of petroleum refining
A certain first-row transition metal ion forms many different colored solutions. When four coordination compounds of this metal, each having the same coordination number, are dissolved in water, the colors of the solutions are red, yellow, green, and blue. Further experiments reveal that two of the complex ions are paramagnetic with four unpaired electrons and the other two are diamagnetic. What can be deduced from this information about the four coordination compounds
Answer:
See explanation
Explanation:
From the analysis we have in the question, we must look towards a first row transition metal ion having a d^6 configuration because it yields a paramagnetic complex having four unpaired electrons and a diamagnetic complex having no unpaired electrons.
We have two possible candidates in mind, Fe^2+ and Co^3+. However, Fe^2+ does not form as many coloured complexes as stated in the question so we have to eliminate that option.
We are now left with only Co^3+. Various ligands are going to cause these various colours of Co^3+ to appear in solution.
Hence, we can deduce from all these that the nature of ligands determines the colour of the complex . Don't forget that the colour of a complex arises from crystal field splitting.
what is the volume of a book that has a width of 10cm,a length that is 2 times the width,and a height that is half the width
width=10cm
length=2xwidth=2x10=20cm
height=width/2=10/2=5
V=w*l*h=10*20*5=1000cm^3
Answer:
1000cm^3
Explanation:
first collect what is known
width 10cm
length 2×width (2×10cm) =20cm
height width/2 (10cm/2) =5cm
now if we use the formula for finding volume of a cuboid that has length, width and height known;
V = l×w×h
= 20cm × 10cm × 5cm
= 1000cm^3
What element needs just a single extra electron to have the same electron configuration as helium?
Answer:
Hydrogen
Explanation:
Helium has an atomic number Z = 2, that is, it has 2 protons. Since it is electrically neutral it also has 2 electrons. Thus, the electron configuration of helium is 1s².
Hydrogen has an atomic number Z = 1, that is, it has 1 proton. Since it is electrically neutral it also has 1 electron. Thus, the electron configuration of hydrogen is 1s¹.
If hydrogen gains a single extra electron to form H¹⁻, it acquires the same electron configuration than helium.
Don’t know need the anwser !!DUE MONDAY!!
Answer: The distance is slightly less than 3.5 m
Explanation: assuming wall and target are the same thing, and the bullet has constant velocity, the bullet will travel 7 m in half a second, so half that distance is 3.5 m.
In reality, the bullet is decelerating (at an unknown rate) so the distance is slightly less than 3.5 m.
There is also a vertical velocity component, which means it hits the target/wall at an angle. The trajectory is such that it hits the wall above the shooter because the ricochet hits at ~the level at which it left the firearm.
If the wall was absent, the bullet would have described a parabola which brough it back to the initial level after 7m. This could be calculated, but it means that the actual distance between the shooter and the wall is slightly less than 3.5 m
In addition, the collision with the wall is not 100% elastic, so the velocity aftercthe ricochetvis further reduced.
A calculation would be complex because these confounding factors are not completely independent of each other, but all reduce the average velocity and therefore the distance.
Therefore it is only possible to say that the distance was somewhat less than 3.5 m
name the group and period of an element having atomic number 21
Answer:
The element in question here is Scandium, with an atomic number of 21. It is situated in Group 3 and Period 4 of the Periodic Table.
Explanation:
Hope this helped!
help please I need help with these two questions answer truthfully get brainliest?!!
Answer:
1. 3x-3=18
Value of x=7
2. 4x-5=23
value of x=7
Answer:
b 7 for one
a 3 for two
Explanation: