Answer:
Total heat required to raise the temperature of water from 45.7°C to 103.5°C
= 249,362.4 J
Explanation:
The Heat required to raise the temperature of 100.0 g of water from 45.7°C to 103.5°C will be a sum of;
- The heat required to raise the 100 g of water from 45.7°C to water's boiling point of 100°C
- The Heat required to vaporize the 100 g of water at its boiling point
- The Heat required to raise the temperature of this vapour from 100°C to 103.5°C
1) The heat required to raise the 100 g of water from 45.7°C to water's boiling point of 100°C
Q = mCΔT
m = 100 g
C = 4.18 J/g.°C
ΔT = change in temperature = (100 - 45.7) = 54.3°C
Q = 100 × 4.18 × 54.3 = 22,697.4 J
2) The Heat required to vaporize the 100 g of water at its boiling point
Q = mL
m = 100 g
L = ΔHvaporization = 2260 J/g
Q = mL = 100 × 2260 = 226,000 J
3) The Heat required to raise the temperature of this vapour from 100°C to 103.5°C
Q = mCΔT
m = 100 g
C = 1.90 J/g.°C
ΔT = change in temperature = (103.5 - 100) = 3.5°C
Q = 100 × 1.9 × 3.5 = 665 J
Total heat required to raise the temperature of water from 45.7°C to 103.5°C
= 22,697.4 + 226,000 + 665
= 249,362.4 J
Hope this Helps!!!
Answer:
249362.4 J
Explanation:
The following were Data were obtained from the question:
Mass (M) = 100g
Initial temperature (T1) = 45.7°C
Final temperature (T2) = 103.5°C
Heat of vaporisation (ΔHv) = 2260 J/g
Specific heat capacity (C) of steam = 1.90 J/g
Specific heat capacity (C) of water = 4.18 J/g
To calculate the heat needed to increase the temperature of water from 45.7°C to 103.5°C, the following must be observed:
Step 1:
Determination of the heat needed to raise the temperature of water from
45.7°C to its boiling point 100°C.
This is illustrated below:
Mass (M) = 100g
Initial temperature (T1) = 45.7°C
Final temperature (T2) = 100°C
Specific heat capacity (C) of water = 4.18 J/g
Change in temperature (ΔT) = T2 – T1 = 100°C – 45.7°C = 54.3°C
Heat (Q1) =?
Q = MCΔT
Q1 = 100 x 4.18 x 54.3
Q1 = 22697.4 J
Step 2:
Determination of the heat needed to vaporise 100g of water.
This is illustrated below:
Mass (M) = 100g
Heat of vaporisation (ΔHv) = 2260 J/g
Heat (Q2) =?
Q2 = MΔHv
Q2 = 100 x 2260
Q2 = 226000 J
Step 3:
Determination of the heat needed to raise the temperature of steam from 100°C to 103.5°C.
This is illustrated below:
Mass (M) = 100g
Initial temperature (T1) = 100°C
Final temperature (T2) = 103.5°C
Specific heat capacity (C) of steam = 1.90 J/g
Change in temperature (ΔT) = T2 – T1 = 103.5°C – 100°C = 3.5°C
Heat (Q3) =?
Q3 = MCΔT
Q3 = 100 x 1.9 x 3.5
Q3 = 665 J
Step 4:
Determination of the overall heat needed.
This is simply obtained by adding all the heat calculated above. This is illustrated:
QT = Q1 + Q2 + Q3
Q1 = 22697.4 J
Q2 = 226000 J
Q3 = 665 J
Total heat (QT) =..?
QT = Q1 + Q2 + Q3
QT = 22697.4 + 226000 + 665
QT = 249362.4 J
Therefore, the heat needed to increase the temperature of 100g of water from 45.7°C to 103.5°C is 249362.4 J
If I add 375 of water to 125 mL of a 0.90 M NaOH solution, what will the molarity of the diluted solution be?
Answer:
0.225M
Explanation:
Step 1:
Data obtained from the question. This includes:
Volume of the stock solution (V1) = 125mL
Molarity of the stock solution (M1) = 0.90 M
Volume of the diluted solution (V2) = 125 + 375 = 500mL
Molarity of the diluted solution (M2) =..?
Step 2:
Determination of the molarity of the diluted solution.
This is obtained by using the dilution formula as follow:
M1V1 = M2V2
0.9 x 125 = M2 x 500
Divide both side by 500
M2 = (0.9 x 125) /500
M2 = 0.225M
Therefore, the molarity of the diluted solution is 0.225M
Answer:
The molarity of the diluted solution of NaOH is 0.225 M NaOH
Explanation:
Here, we have, initial concentration of the solution = 0.90 M NaOH
Volume of initial solution = 125 mL
Volume of added water = 375 mL
Total volume of diluted solution = 375 mL + 125 mL = 500 mL
Number of moles in the diluted solution = 0.9 × 0.125 = 0.1125 moles of NaOH
Derived from the following relation;
0.9 M NaOH indicates that 1000 mL contains 0.9 moles of NaOH
Therefore, 1 mL contains 0.9/1000 moles of NaOH and 125 mL contains 0.9/1000×125 or 0.9 × 0.125 moles of NaOH
Therefore, the diluted 500 mL solution contains 0.1125 moles of NaOH. Therefore, 1000 mL of the diluted solution will contain [tex]1000 \times \frac{0.1125}{500} \ moles[/tex] of NaOH or 0.225 moles of NaOH
Hence the molarity of the diluted solution of NaOH, which is the number of moles per 1000 mL is 0.225 M.
Describe how a cold front affects weather.
The reaction in which two amino acids form a dipeptide and a water molecule is called a _____ reaction. condensation
hydration
Answer:
Condensation Reaction
Explanation:
How much heat is required to raise the temperature of 179g of acetic acid, CH3COOH, from 250C to 82.70C?
Answer:
HEAT REQUIRED TO RAISE THE TEMPERATURE OF 179 ACETIC ACID FROM 25 °C TO 82.7°C IS 21 100j OR 21.1 kJ
Explanation:
Heat = mcΔT
m = 179 g
C = 2.043 J.g-1K-1
ΔT = ( 82.70 - 25 ) = 57.7°C
Heat = 179 * 2.043 * 57.7
Heat = 21, 100.72 J
Heat ≅ 21.1 kJ
When human prevent waste or loss it is known as
Answer:
im not sure exactly what terms this question is in but recycling?
Easy Help Please!!!!!!
Either oxidation or reduction can take place independently in any particular reaction. True or False
Answer:
False
Explanation:
Which of the following is an example of potential energy changing into kinetic energy?
A. A girl climbing up a hill
B. A fruit falling from a tree
C. A car stopping when the brake is applied
D. A child on a swing slowing down as she swings upwards
Answer
B. a fruit falling from a tree
Explanation:
Take, for example, an apple tree. ... The tree uses this energy to build leaves and branches and fruit. When an apple falls from the tree to the ground, its energy of position (stored as gravitational potential energy) is converted to kinetic energy, the energy of motion, as it falls.
How many grams are in 0.25 mol KNO3? The molar mass of KNO3 is 101 g/mol.
Answer: 25.3g
Explanation:
The number of moles in chemistry is connected to the Mass and Molar mass of a compond through the following formular;
Moles = Mass (g) / Molar Mass (g/mol)
0.25 mol = Mass (g) / 101 g/mol
Make 'Mass' the subject of the formular;
Mass = 0.25 mol x 101 g/mol
= 25.25 approx 25.3g
The specific heat of copper is 0.4 J/g^ *C If a sample of copper absorbs 480J of energy and its temperature changes from 20.0 ^* c to 60.0 ^ * C what mass of copper was heated?
Answer:
The mass of copper that was heated is 30 g
Explanation:
The formula for the heat supplied, ΔH is;
ΔH = m·c·Δt
Where:
ΔH = Heat supplied = 480 J
m = Mass of the copper sample = Required
c = Specific heat capacity of copper = 0.4 J/(g·°C)
Δt = Change in temperature = T₂ - T₁ = 60° - 20° = 40°C
T₁ = Initial temperature = 20°C
T₂ = Final temperature = 60°C
Therefore, plugging the values, we have;
480 = m×0.4×40
m = 480/(0.4 × 40) = 30 g
The mass of copper that was heated = 30 g.
If you constructed graphs, what trends do they indicate in your data?
Answer:A linear pattern is a continuous decrease or increase in numbers over time. On a graph, this data appears as a straight line angled diagonally up or down (the angle may be steep or shallow). So the trend either can be upward or downward.
Explanation:
Graphs are the diagrammatic representation of the data. The constructed graph gives the upward or downward trends in the data over the respective trends.
What are the types of graphs?The graphs can be distinguished based on the type of data representation technique used.
The graphs can be line, pie, bar, etc. The data plotted in the graph shows the trends with the angle of the line and the slope. The increasing slope tends to interpret the increasing trend, and vice versa.
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The image below shows the surface of the Moon.
The circle-shaped pits on the surface of the Moon are usually caused by collisions with asteroids or comets and are known as _______.
A.
plains
B.
mountains
C.
dunes
D.
craters
An iron nail rusting is from a process called oxidation, this is an example of a
Answer:
Chemical change
What is the atomic number of this atom?
Answer:
2?????
Explanation:
How does wavelength differ in high and low frequency waves?
In high frequency waves, the wavelength is short and appears in many short bursts. Meanwhile, in a low frequency wave, the wavelength is longer since it takes it a longer period of time to occur/pass.
Given the equation representing a system at equilibrium in a sealed, rigid container:
2HI(g) <->H2(g) + I2(g) + energy
Increasing the temperature of the system causes the concentration of
1)HI to increase
2)H2 to increase
3) HI to Remain constant
4) HI to Remain constant
Answer: 1) HI to increase
Explanation:
Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
[tex]2HI(g)\rightleftharpoons H_2(g)+I_2(g)+energy[/tex]
As the given reaction is exothermic , on increasing the tempearture, the equilibrium will shift in the direction where decrease in tempearture is taking place.So, the equilibrium will shift in the left direction. i.e. towards reactants. Thus amount of [tex]HI[/tex] will increase.
When the temperature of the system increased so it leads the concentration to option 1. HI to increase.
What is L-e-Ch-atelier's principle?It defines that if any change in the reaction variables so the equilibrium should be shifted in the direction so the impact should be minimized.
Since the given reaction is considered to be exothermic, so in the case when the temperature is increased so the equilibrium should be shifted in the direction that reduced the temperature.
Therefore, the equilibrium should be shifted in the left direction.
Hence the first option is correct.
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5.
To inflate a weather balloon you must increase its volume from 0.58 L (nearly empty for a weather balloon) to a full volume
against an external pressure of 1 atm exactly. The process requires 22.632 kJ of work. What is the volume of the balloon?
(The original formula would be something around [deltaE = deltaH - PdeltaV])
Answer:
ANswers is simply
Explanation:
8.73kJ
Which subscripts complete the chemical formula for the compound?
CaHb
Answer choices for a: 1,3,8
b:1,3,8
Question:
Which subscripts complete the chemical formula for the compound?
Answer:
A: 3
B: 8
Answer:
A) 3
B) 8
Explanation:
1.
Which phenomenon is responsible for sending electrically charged particles out into space?
prominences
sunspots
solar wind
O solar eclipses
w
Answer:
solar wind
Explanation:
pls pls pls give me brainiesttt tyty
good luck :)
Calculate the pressure using the formula
P= 1.03 + Mass on
Syringe/ area of Top of Syringe
Pressure:
kg/cm2
Answer:is 1.08 kg
Explanation:
Just got it wrong and it gave me the answer
47.5atm is the total pressure. The force delivered perpendicularly to an object's surface per unit area across how that force is dispersed is known as pressure
What is pressure?The force delivered perpendicularly to an object's surface per unit area across how that force is dispersed is known as pressure (symbol: p / P).445 Gauge pressure, sometimes written as gauge pressure, is the pressure in relation to the surrounding air pressure.
Pressure is expressed using a variety of units. Some of these come from dividing a unit of force by a unit of area; for instance, the SI unit of stress, the pascal (Pa), is equal to one newton each square metre (N/m2), and the conventional unit of pressure used by both the imperial while US customary systems is the pound-force according square inch of surface (psi, symbol lbf/in2).
Volume of gas = 47.5ML
P x V=51.3
P x 47.5=51.3
P=47.5atm
Therefore, 47.5atm is the total pressure.
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As the peppered moth evolved over time, its wings changed from light to dark so that it could better A) find food to eat. B) combat pollution. C) hide from predators. D) withstand its climate.
Answer:
C) Hide from predators
Explanation:
The smoke would allow the peppered moths to be more visible
Therefore, they evolved into dark-peppered moths to be able to hide from those predators.
A group of scientists develops a new fertilizer. Which branch of chemistry are they engaged in?
A.) Organic Chemistry
B.) Inorganic Chemistry
C.) Biochemistry
D.) Analytical Chemistry
Answer:
A. Organic Chemistry
Explanation:
Because Fertilizer is a organic Mixture
Answer:
A. Organic Chemistry
Explanation:
which of these describes the electrostatic force
a. particles of the same charge repel each other
b. particles of different masses repel each other
c. particles of opposite charge repel each other
d. particles without charge repel each other
Answer:
A
Explanation:
like charge repel, unlike attract
Answer:
A.
Explanation:
Particles of the same charge repel each other. E.g. + and + OR - and -.
Comets _____. orbit the Earth are usually found between Jupiter and Mars have very irregular shapes have very elliptical orbits
Comets have very elliptical orbits, are usually found in the outer regions of the solar system, have irregular shapes, and exhibit a coma and tail when they approach the Sun.
Comets are celestial objects that have very elliptical orbits. Unlike planets, which have more circular orbits, comets follow a path that is elongated and elongated.
Comets are usually found in the outer regions of our solar system, beyond the orbit of Mars, in a region known as the Kuiper Belt or the Oort Cloud. These regions are located far away from the Sun, where the gravitational pull is weaker, allowing comets to maintain their elliptical orbits.
The irregular shape of comets is another characteristic feature. Unlike planets, which have a more spherical shape due to their strong gravitational force, comets have a more irregular shape. This is because comets are made up of a combination of ice, dust, rock, and other materials, which can cause them to have a lumpy or uneven appearance.
When a comet approaches the inner regions of the solar system, it can be observed as a bright coma or "head" surrounding a nucleus. The nucleus is the solid core of the comet, composed mainly of ice and rock. As the comet gets closer to the Sun, the heat causes the ice to vaporize, creating a glowing coma and often a tail that points away from the Sun.
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An engineer is trying to produce as much hydrogen gas as the company can using the equipment they have.
The engineering obtained the following data from research.
Sodium + Sulfuric Acid
Sodium Sulfate + Hydrogen
Mass of Na (g)
Mass of H,SO. (g)
Mass of Na,so ()
Mass of H. (g)
1149.5
2450
3549.5
50
2299
4900
7099
100
3448.5
1
7350
10648.5
150
Beginning: (5 points)
Reacting 2299 g of sodium requires 4900 g of sulfuric acid, as seen in the data table. How many moles of each substance is
this? Show your work and/or explain the math that you used to arrive at this answer.
Developing: (5 points).
Based on the chemical equation, how much sulfuric acid, in grams, is consumed from the reaction of 1450 g of sodium
metal? Show your work and/or explain the math that you used to arrive at this answer.
Proficient: (6 points)
The equipment the engineer has can only hold a maximum of 1450 g of sodium before it is mixed with excess sulfuric acid
to carry out the reaction described above. How much hydrogen gas can be produced from the equipment they currently
have? Show your work and/or explain the math that you used to arrive at this answer.
Answer:
See explaination
Explanation:
Please kindly check attachment for the step by step solution of the given problem.
How many moles of Magnesium Oxide are produced when 11 moles of oxygen are reacted ?
Answer:
22Mol
Explanation:
2Mg + O2 --> 2MgO
If 11 mols of O2 reacted with excess Mg with 22 MgO moles will be created
Which of the following species cannot act as a Lewis base?
NH2-
NH4+
NH3
N3-
NH2-
Answer:
NH4+
Explanation:
A Lewis base is a substance with the ability to share or give pairs of electrons.
The NH4 + ammonium ion donates a proton, therefore the ammonium ion is a Lewis acid.
The species that cannot act as a Lewis base NH4+.
What is Lewis's base?
It refers to a substance like OH- ion where the pair should be donated of non-binding electrons. It should be treated as the electron-pair donor. Also, the one advantage is that it complements the reduction and oxidation of the reaction model. Moreover, it shows the capability for sharing or providing the pair of electrons. Also, NH4+ donated the portion so ammonium ion is a Lewis acid.
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Which type of muscle tissue aids in digestion
Answer: The muscularis (muscularis externa)
Explanation: please brainliest
the muscle that helps with digestion is a smooth muscle called the tract
The sugar deoxyribose is an important component of DNA. Deoxyribose is 44.8% 7.5% H, and 47.7% O by mass. What is the empirical formula for deoxyribose?
Answer:
C₅H₁₀O₄
Explanation:
The empirical formula is the simplest whole-number ratio of atoms in a compound.
The ratio of atoms is the same as the ratio of moles.
So, our job is to calculate the molar ratio of C:H:O.
Assume 100 g of deoxyribose.
1. Calculate the mass of each element.
Then we have 44.8 g C, 7.5 g H, and 47.7 g O.
2. Calculate the moles of each element
[tex]\text{Moles of C} = \text{44.8 g C} \times \dfrac{\text{1 mol C}}{\text{12.01 g C}} = \text{3.730 mol C}\\\\\text{Moles of H} = \text{7.5 g H} \times \dfrac{\text{1 mol H}}{\text{1.008 g H }} = \text{7.44 mol H}\\\\\text{Moles of O} = \text{47.7 g O} \times \dfrac{\text{1 mol O}}{\text{16.00 g O }} = \text{2.981 mol O}[/tex]
3. Calculate the molar ratio of the elements
Divide each number by the smallest number of moles
C:H:O = 3.730:7.44:2.981 = 1.251:2.50:1 = 5.005:9.98:4 ≈ 5:10:4
4. Write the empirical formula
EF = C₅H₁₀O₄
bruh i dont have a question what up ?
Answer:
?
Explanation:
Answer : the sky (teehee)
A reaction occurs when solid X is placed into solution Y. As a result, the temperature of the new solution increases by 3°C.
The temperature rises another 2°C when more of solid X is added to the solution. What does this indicate about the effect of
adding more solid?
It increased the number of molecular collisions.
It decreased the number of molecular collisions.
It decreased the space between the molecules and lowered the reaction rate.
It increased the space between the molecules and increased the reaction rate.
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