Answer:
Olefin production is a petrochemical process in which saturated hydrocarbons are broken down into smaller, regularly unsaturated ones
A plum with a mass of 35 g contains 30 Cal of nutritional energy. How many plums should a person consume to get
120 Cal of energy
If a Plum with a mass of 35 g contains 30 Cal of nutritional energy, then a person should consume four plums to get 120 Cal of energy.
What is multiplication?Finding the product of two or more numbers in mathematics is done by multiplying the numbers.
It is one of the fundamental operations in mathematics that we perform on a daily basis.
As given in the problem If a Plum with a mass of 35 g contains 30 Cal of nutritional energy, then we have to find out a person should consume how much plums to get 120 Cal of energy.
30 cal of nutritional energy = 1 plum
1 cal of nutritional energy = 1/30 plums
120 cal of nutritional energy = 120/30 plums
= 4 plums
Thus, a person should consume four plums to get 120 Cal of energy.
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if you take a part time job while you are still in school what might your opportunity scost be
The opportunity costs of working part-time while attending high school could be studying time, grades, and your own free time. It depends on the person, how they do in school, but if it were for me, I would say the benefits outweigh the costs. I have enough time to study and still get good grades in school.
Answer:
I don't know I'm rich student
Explanation:
sorry
how mass affects the volume of the solid?
We can say that the volume of the object is directly proportional to its mass. As the volume increases the mass of the object increases in direct proportion. The gradient of the graph equals the density of the material.
A car starts rest and gains velocity 20 m/s
in 10 second its acceleration
Answer:
2
Explanation:
final velocity: 20
initial velocity: 0
time taken: 10
acceleration: ?
a=( v-u)÷2
a=(20-0)÷2
a=20÷2
therefore acceleration =2
In an exothermic reaction, the _______ have more energy than the _________.
A. reactants, products
B. products, reactants
C. reactants, surroundings
D. None of these
In an exothermic reaction, the reactants have more energy than the products.
The heat of combustion of CH4 is 890.4 KJ/mol, and the heat capacity of H20 is 75.2 J/molK. Find the volume of methane measured at 298K and 1.00 atm required to convert 1.00L of water at 298 K to water vapor at 373K.
Q methane = Q water
Q = mcΔt
mass water = V x ρ = 1 L x 1 kg/L = 1 kg
298 K to 373K = 25 °C to 100 °C
c water = 75.2 J/mol K = 4.2 J / g °C = 4200 J/kg °C
Q water = 1 x 4200 x (100 - 25)
Q water = 315000 J
Q methane = Q water = 315000 J = 315 KJ
n (mol) methane = ΔH/Q = 890.4 / 315 = 2.83
PV = nRT
V = nRT/P
V = 2.83 x 0.082 x 298/1
V = 69.15 L
Traveling at the speed of light - how long would it take, in years, to reach the top of the pile of balls? Show all calculations. The height of the pile is 1.10 x 10^14 km
The time taken for the object to reach to top of pile is 0.012 year.
Time of motionThe time taken for the object to reach to top of pile is calculated as follows;
time of motion = distance traveled/speed
time of motion = (1.1 x 10¹⁴ x 10³ m)/(3 x 10⁸ m/s)
where;
speed of light = 3 x 10⁸ m/stime of motion = 3.67 x 10⁵ sec = 0.012 year
Thus, the time taken for the object to reach to top of pile is 0.012 year.
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The students want to increase the volume of gas the pond weed makes in 5 minutes.
The students use a drinking straw to bubble some of their breath into the water.
The volume of gas the pond weed makes increases.
Explain why.
Answer: By blowing into the drinking straw to bubble some of their breath in the water, they are adding gas to the water. This will cause the volume of gas to increase.
The students want to increase the volume of gas the pond weed makes in 5 minutes. The students use a drinking straw to bubble some of their breath into the water. The volume of gas the pond weed makes increases because By blowing into the drinking straw to bubble some of their breath in the water, they are adding gas to the water.
This will cause the volume of gas to increase. One way the students could increase the volume of gas the pond weed makes in five minutes is by increasing light intensity. Pond weeds carry out photosynthesis to produce oxygen and light is an essential factor that affects rate of photosynthesis.
If light intensity is increased, more light energy will be available for plant to convert into chemical energy, which can be used in photosynthesis to produce more oxygen. This increases the volume of gas the pond weed makes in given time.
To increase the light intensity, students could move plant closer to a light source or use stronger light source.
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A student determines that a 9.8 g mixture of MgCl₂ (s) and NaNO3(s) contains 0.050 mol of
MgCl₂(s).
Based on the student's measurement, what is the mass percent of Cl in the mixture?
mass MgCl₂ = mol x MM MgCl₂ = 0.05 x 95.211 g/mol = 4.76 g
mass Cl in MgCl₂ :
= (2 x AM Cl)/MM MgCl₂ x mass MgCl₂
= (2 x 35.5 g/mol)/95.211 g/mol x 4.76
= 3.55 g
% mass Cl in the mixture :
= (mass Cl / mass mixture) x 100%
= 3.55 / 9.8 x 100%
= 36.22%
What would be the mass in grams of 8.94 x 10 22 formula units of copper(II) fluoride, CuF 2
The mass in grams of 8.94×10²² formula units of CuF₂ is 15.07 g
Avogadro's hypothesis6.02×10²³ formula units = 1 mole of CuF₂
But
1 mole of CuF₂ = 101.5 g
Thus,
6.02×10²³ formula units = 101.5 g of CuF₂
How to determine the mass of 8.94×10²² formula units of CuF₂6.02×10²³ formula units = 101.5 g of CuF₂
Therefore,
8.94×10²² formula units = (8.94×10²² × 101.5 ) / 6.02×10²³
8.94×10²² formula units = 15.07 g of CuF₂
Thus, 8.94×10²² formula units are present in 15.07 g of CuF₂
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What is the equation for density?
O D= m
V
OD=V
m
OD=m
OD=mv²
Answer:
D = m/V
Explanation:
Density represents the following ratio:
Density (D) = mass (m) / volume (V)
In this formula, the volume is being divided from the mass. The typical units for mass is grams and the unit for volume is milliliters.
How many mL of a 1.48 M calcium hydroxide solution are needed to neutralize 36.0 mL of a 1.63 M hydrochloric acid solution
The volume (in mL) of calcium hydroxide, Ca(OH)₂ needed for the reaction is 19.8 mL
Balanced equation2HCl + Ca(OH)₂ —> CaCl₂ + 2H₂O
From the balanced equation above,
The mole ratio of the acid, HCl (nA) = 2The mole ratio of the base, Ca(OH)₂ (nB) = 1How to determine the volume of Ca(OH)₂ Molarity of base, Ca(OH)₂ (Mb) = 1.48 MVolume of acid, HCl (Va) = 36 mL Molarity of acid, HCl (Ma) = 1.63 MVolume of base, Ca(OH)₂ (Vb) =?MaVa / MbVb = nA / nB
(1.63 × 36) / (1.48 × Vb) = 2
58.68 / (1.48 × Vb) = 2
Cross multiply
2 × 1.48 × Vb = 58.68
2.96 × Vb = 58.68
Divide both side by 2.96
Vb = 58.68 / 2.96
Vb = 19.8 mL
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Gamma-ray bursters emit pulses of gamma rays with high energies. The frequency of the most energetic pulses has been measured at around 3.0x10 21 hz. What is the wavelength of the gamma rays
The wavelength of these gamma rays will be 1x1[tex]10^{-13}[/tex] m.
How do you define wavelength?
The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
The length of a wave is measured in its propagation direction. The wavelength is measured in meters, centimeters, nanometres, and other units since it is a distance measurement.
The relationship between the wave's wavelength, frequency, and speed is given as
wavelength = speed of light ÷ frequency
wavelength = [tex]\frac{3 X10^8}{3.0 X10^{21}}[/tex]
wavelength = 1x[tex]10^{-13}[/tex] m
Hence the wavelength of these gamma rays will be [tex]1 X 10^{-13}[/tex]m.
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Perform the following
mathematical operation, and
report the answer to the
correct number of significant
figures.
9.635 ÷ 12.9 = [?]
The answer is .747
What are significant figures?There are 5 main rules to determining what are and what are not significant figures.
All non-zero digits are significant.If a decimal point is expressed, all zeros following non-zero digits are significant.If a decimal point is not explicitly expressed, zeros following the last non-zero digit are not significant.If a zero is bounded by non-zero digits, the zero is significant.Zeros preceding the first non-zero digit are not significant, they are placeholders only.NOTE: In any measurement, the last digit is always assumed to be estimated.
How do I divide/multiply with significant figures?The number of significant figures retained may not exceed the least number of digits in either of the factors. There will always be the same number of significant figures in the answer as the factor with the least amount of digits.
How do I apply that to this problem?Given:
[tex]9.635 /12.9 =?[/tex]
In the given problem, the number with the least amount of digits is 12.9. As we recall from above, all non-zero numbers are significant, therefore all of these numbers are significant. Hence, we should have 3 significant figures in our final answer.
Now we use a calculator to simply calculate the above and we obtain:
[tex]0.7468992248[/tex]
We want to have 3 significant figures, so we will take the first 3 significant figures in that answer, .746, and use that. We apply rounding properties and obtain our final answer of .747.
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Question 101 p
Simple syrup is the original, the most basic, and general one of the most common ways to add sweetness to a cocktail. You can choose from a range of suga
when making your simple syrup.
a White Sugar
Ob Splenda
De Raw Sugar
Od Brown Sugar
Answer:
splenda
Explanation:
Hechar azucar no es del todo una buena opcion ya que puede poducir caries
A sample of gas has a temperature of 373 K and a volume 247 ml. If the temperature is increased to 473 K, what is the new volume?
Which of the following molecules contains a polar covalent bond?
O A. Og
O B. N₂
O G. H₂
O D. CO
Answer:
CO contains polar covalent bond, because these atoms share unequal electrons.
Answer:
N₂
Explicacion:
Si la diferencia de electronegatividad es muy alta, por ejemplo entre un metal y un no metal, se forman enlaces iónicos
Pls help!!!!!
Tysm! Xxx
Answer:
Explanation:
The equation says for every 3 moles of barium chloride you can make 2 aluminum chloride.
(8/3)*2 = 5.33 moles
On the box of a cake mix, the recipe says that it makes 24 cupcakes. When
the baker makes the cake mix, it only makes 16 cupcakes. What's the percent
yield of cupcakes?
%yield = actual/theoretical x 100%
%yield = 16/24 x 100%
% yield = 67%
How much heat is required to melt 38.6 g of ice (0 degrees Celsius)? The heat of fusion for water is 6.02 kJ/mol.
Express your answer in kilojoules to three significant figures
Given the heat of fusion of water is 6.02 kJ/mol, it takes 12.9 kJ of heat to melt 38.6 g of ice at 0 °C.
What is fusion?Fusion, commonly known as melting, is a physical process in which matter passes from the solid to the liquid state.
We have ice with a mass of 38.6 g at 0 °C. First, we will convert mass to moles using the molar mass of water.
38.6 g × (1 mol/18.02 g) = 2.14 mol
The heat of fusion (ΔH°fus) for water is 6.02 kJ/mol. The heat (Q) required to melt 2.14 moles of ice is:
Q = 6.02 kJ/mol × 2.14 mol = 12.9 kJ
Given the heat of fusion of water is 6.02 kJ/mol, it takes 12.9 kJ of heat to melt 38.6 g of ice at 0 °C.
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How many SO2 molecules are in 1.76 mol of SO2? How many sulfur atoms and oxygen atoms are there?
Answer:
1.76 * 6.02*10^23 = 1.05952*10^24
1.05952*2 = 2.11904 *10^24 oxygen and 1.05952*10^24 sulfur atoms
In 1.76 moles of SO₂, there are approximately 1.06 x 10²⁴ SO₂ molecules, 1.06 x 10²⁴ sulfur atoms, and 2.12 x 10²⁴ oxygen atoms. For determining the number of SO₂ molecules, sulfur atoms, and oxygen atoms in 1.76 moles of SO₂, we need to use Avogadro's number, which is approximately 6.022 x 10²³ particles per mole.
1 mole of any substance contains Avogadro's number of particles, which includes atoms or molecules. Therefore, to find the number of SO₂ molecules in 1.76 moles, we can multiply 1.76 moles by Avogadro's number:
Number of SO₂ molecules = 1.76 moles × Avogadro's number
Number of SO₂ molecules = 1.76 moles × 6.022 x 10²³ molecules/mol
Number of SO₂ molecules ≈ 1.06 x 10²⁴ molecules
Next, we can find the number of sulfur atoms and oxygen atoms in 1.76 moles of SO₂. In one molecule of SO₂, there is 1 sulfur atom and 2 oxygen atoms. So, the total number of sulfur atoms and oxygen atoms can be calculated as follows:
Number of sulfur atoms = Number of SO₂ molecules × 1 sulfur atom/molecule
Number of sulfur atoms = 1.06 x 10²⁴ molecules × 1 sulfur atom/molecule
Number of sulfur atoms ≈ 1.06 x 10²⁴ sulfur atoms
Number of oxygen atoms = Number of SO₂ molecules × 2 oxygen atoms/molecule
Number of oxygen atoms = 1.06 x 10²⁴ molecules × 2 oxygen atoms/molecule
Number of oxygen atoms ≈ 2.12 x 10²⁴ oxygen atoms
So, in 1.76 moles of SO₂, there are approximately 1.06 x 10²⁴ SO₂ molecules, 1.06 x 10²⁴ sulfur atoms, and 2.12 x 10²⁴ oxygen atoms.
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What mass of silver nitrate, AgNO3, is needed to make 500.0 mL of 0.600 mol/L AgNO3(aq)?
50.97 g AgNO₃ is needed to make 500.0 mL of 0.600 mol/L AgNO3(aq)
What are moles?A mole is defined as 6.02214076 × [tex]10^{23}[/tex]of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Molar mass of AgNO₃ = (107.9 + 14.0 + 16.0×3) g/mol = 169.9 g/mol
Molarity = Moles of solute ÷ Volume of solution in litre
0.600 mol/L = Moles of solute ÷ 0.5 mL
Moles of solute =0.3 mol
Moles =[tex]\frac{mass}{molar \;mass}[/tex]
0.3 mol = [tex]\frac{mass}{169.9 g/mol}[/tex]
Mass =50.97 g AgNO₃
Hence, 50.97 g AgNO₃ is needed to make 500.0 mL of 0.600 mol/L AgNO3(aq).
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Feedback
Consult a peer or a family member about ways your design could be improved. Describe the feedback and provide the name of the reviewer. These are only suggestions that you can use to plan for Design Two. Use complete sentences and detailed examples.
l need this answer first one to get it gets brainlist
Explanation:
We gujra weeeeeeeeeeeeeee
We gujra weeeeeeeeeeeeeee
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How many moles of Li would react with 4 moles of MgBr₂ in the reaction
described by this chemical equation?
2Li + MgBr₂ → Mg + 2LiBr
-
A. 4
OB. 2
C. 8
D. 3
I NEED HELP ASAP PLEASE
Answer:
two may be the answer (2)
The freezing point of pure water is 0.0°C. How many grams of ethylene glycol (C2H6O2) must be mixed in 100.0 g of water to lower the freezing point of the solution to -4.3°C?
_______ g
The mass of the ethylene glycol used is 14.26 g
What is the freezing point?The freezing point is the temperature at which a liquid is converted to a solid.
Given that;
ΔT = 0.0°C - ( -4.3°C) = 4.3°C
ΔT = 4.3°C
But we know that
ΔT = k m i
m = ΔT/k i
m = 4.3°C/1.86 °C/m * 1
m = 2.3 m
Now;
Let the mass of ethylene glycol be m
Molar mass of ethylene glycol = 62 g/mol
Mass of solvent = 100.0 g or 0.1 Kg
Then;
2.3= m/62/0.1
2.3 = m/62 * 0.1
m = 2.3 * 62 * 0.1
m = 14.26 g
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Question 7 (2 points)
A mocktail is a flavoured cocktail.
O True
O False
Answer:
false mocktail is liquor yea
Determine which of the following elements would gain electrons when becoming ions: I. Hydrogen II. Helium III. Sulfur IV. Fluorine V. Gallium A. III and IV B. II, III, and IV C. I and V D. I and II
Hydrogen, iron, and gallium is the correct answer. Hence, option B is correct.
What is an electron?An electron is a negatively charged subatomic particle.
Let us take another look at the periodic table. The periodic table is composed of metals, metalloids and nonmetals.
Metals lose electrons more easily, that is why they form cations. Metals are found on the left-hand side of the periodic table.
As we move away from the left-hand side of the periodic table, the ability to form cations decreases as metallic character decreases and elements become more nonmetallic.
The noble gas helium rarely loses electrons. Fluorine would rather accept an electron to form a negative ion.
Hence, the elements hydrogen, iron and gallium are metals hence they lose electrons more easily.
Hence, option B is correct.
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The diagram shows the apparatus used to separate pure water from impure water. What is the name of the name of this process? (Write one word only)
Distillation is the process which involves the separation of pure water from impure water.
What is Distillation?This is a technique which is used to purify through the boiling and cooling processes in the laboratory and typically involves the use of a liebig condenser.
Pure water is usually collected at 100° celsius with the impurities remaining and filtered out during the process. This is therefore the most apporpriate way of separating pure water from impure water.
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Calculate the standard enthalpy change of reaction for b. 4HNO3(g) + 2H2O(g) → 2N2H4(g) + 7O2(g)
The enthalpy change for the reaction is 1215.75 kJ/mol.
What is enthalpy?The term enthalpy change is the energy that accompanies a reaction. Now we have the reaction; 4HNO3(g) + 2H2O(g) → 2N2H4(g) + 7O2(g)
ΔHf HNO3(g) = -134.31 kJ/mol
ΔHf H2O(g)= -241.83 kJ/mol
ΔHf N2H4(g) = 97.42 kJ/mol
ΔHf O2(g) = 0 kJ/mol
ΔHreaction = [(2 * 97.42) + ( 7 * 0)] - [ (4 * -134.31 ) + (2 * -241.83 )
= 194.84 - (-537.25 - -483.66)
=1215.75 kJ/mol
The enthalpy change for the reaction is therefore 1215.75 kJ/mol.
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In this experiment you’ll be grabbing the relationship between mass and volume you’ll be placing the volume on the X axis and the mass on the way access grabbing the data in this we will cause the slope of a linear regression have a special meaning
The mass and volume has direct proportional to each other.
What is the relationship between mass and volume?The volume of the object is directly proportional to its mass which means that if the volume increases the mass of the object increases also increase and vice versa. Due to this direct relationship, the line of regression will go straight between X and Y axis.
So we can conclude that mass and volume has direct proportional to each other.
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