Answer: 2.26
Explanation:
The heat of the vaporization of water is equal to 2.33 KJ/g.
What is the specific heat capacity?The specific heat capacity can be explained as the quantity of heat required to raise the temperature in one unit of substance by 1 degree Celcius.
The specific heat can be represented in terms of gained or lost heat:
Q = mCΔT
The heat of vaporization can be described as the amount of heat required to turn one gram of a liquid into a vapor, without an increase in the temperature of the liquid.
Given, the amount of heat gained by water, Q = 172.58 kJ
The change in the temperature = 112.5 - 88.3 = 24.2 °C
The specific heat capacity of the water = 4.184 J/g°C
The mass of the water, m = 74 g
The heat of vaporization of water H = q/m
H = 172.58/74
H = 2.33 KJ/g
Therefore, the heat of the vaporization of water is equal to 2.33 KJ/g.
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A 20.0g sample of metal with a specific heat of 5 J/(g°C) raised it's initial temperature to 40.0 when 500J heat was added. What was the initial temperature of the metal?
The initial temperature of the metal = 35 °C
Further explanationHeat can be formulated :
Q = m . c . ΔT
Q = heat, J
c = specific heat, J/g C
ΔT = temperature, °C
m = 20 g
c = 5 J/(g°C)
Q = 500 J
T₁ = 40 C
the initial temperature :
[tex]\tt \Delta t(T_2-T_1)=\dfrac{Q}{m.c}\\\\40-T_1=\dfrac{500}{20.5}\\\\40-T_1=5\\\\T_1=35^oC[/tex]
I have a quick question how do I balance these chemical equations
VbO + E2O → Vb(OE)2
YG + T3N → TG + Y3N
Tu + JgMO3 → Tu(MO3)2 + Jg
XfRf2 + Re2 → XfRf3
What can you make with molecules
Answer:
water
Explanation:
Answer:
Explanation: Las moléculas se encuentran fuertemente enlazadas con la finalidad de formar materia. Las moléculas están formadas por átomos unidos por medio de enlaces químicos.
Which solution has the greatest number of hydroxide ions?
i need a friend....
Answer:
homogeneous solutions
What is the mass of 1.34x10^24molecules of Iron? *
Answer:
Ion channel proteins allow ions to diffuse across the membrane. A gated channel protein is a transport protein that opens a "gate," allowing a molecule to pass through the membrane
Explanation:
Which best describes what is occurring when a door is almost closed and rays of light fan out from the small opening? absorption interference refraction diffraction
Answer:
The correct answer is Option D (diffraction).
Explanation:
Diffraction has been known as a mechanism through which light rays divide across clusters of darkness and light rather than into the colors of the rainbow. That is the twisting of such an obstacle across the sun. In this case, the challenge has been the door from which the illumination moves and bends.Other alternatives are not relevant to the specified case. So, the alternative above would be appropriate.
Answer: D
Diffraction
Explanation:
E D G E 2 0 2 0
give 7 and example of how each wave in the EM spectrum in used in our daily lives
What is the volume of 89.6 moles of gas at STP *
13
0121
This question is about sodium and chlorine.
FIGURE 2 shows the positions of sodium and
chlorine in the periodic table.
FIGURE 2
CI
Na
02
State ONE difference and ONE similarity in t
electronic structure of sodium and of chlori
[2 marks]
The question is asking you to compare each elements electrons, specifically valence since it mentioned their placement on the table.
Similarly: they both are only one electron away from stability (a full octet)
Difference: Sodium will want to loose the one electron, and Chlorine will take it.
Given the following equation:
2KMnO4 → K2MnO4 + MnO2 + O2
How many grams of KMnO4 are required to produce
1.60 grams of O2?
g
Mass of KMnO4 required : 31.607 g
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products
Reaction
2KMnO₄ → K₂MnO₄ + MnO₂ + O₂
mol of O₂ :
[tex]\tt \dfrac{1.6}{16}=0.1[/tex]
mol ratio KMnO₄ : O₂ = 2 : 1
mol of KMnO₄ :
[tex]\tt \dfrac{2}{1}\times 0.1=0.2[/tex]
mass of KMnO₄ :
MW KMnO₄ : 158,034 g/mol
[tex]\tt mass=0.2\times 158,034 =31.607~g[/tex]
Name two or more body systems that work together.
Describe how they work together.
Answer:
All of your body systems have to work together to keep you healthy. Your bones and muscles work together to support and move your body. Your respiratory system takes in oxygen from the air
Explanation:
A wooden block has a mass of 562 g and a volume of 72 cm3. What is the density rounded to the nearest tenth!
Answer:
The answer is 7.81 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{562}{72} \\ = 7.80555555...[/tex]
We have the final answer as
7.81 g/cm³Hope this helps you
Answer:
r
Explanation:
covalent compound formula for hydrogen monochloride
Answer:
HCl
Explanation:
1 hydrogen 1 chlorine
The table below lists the properties of a metallic element.
shiny, silver colored, forms +1 and +2 ions, compound with sulfur is bright red.
Where on the periodic table would this element most likely be found?
Group 1
Group 2
Group 12
Group 13
Answer:
Group 12
Explanation:
Answer:
I got all answers correct on my test and got 100%, this question was in the test which got correct
so your answer is group 12
Explanation:
What type of reaction is illustrated?
Four students are carrying out different laboratory procedures. Piroja is mixing baking soda and vinegar to see if it reacts. Jason is heating salt water over a burner until the water evaporates. Kali is putting crushed ice and ice cubes on a table to see which melts first. Francisco is separating iron filings from sand using a magnet. Which experiment relies on convection? Piroja’s experiment Jason’s experiment Kali’s experiment Francisco’s experiment
Answer: Jason experiment
Explanation:
I just took the test
Answer: Jason's Experiment
For every action, there is an equal and opposite reaction.
Does the statement describe a scientific law?
Answer:
yeah its newton's third law
Explanation:
Rock salt mixed with ice actually lowers the temperature of the salt/ice mix. Physical or chemical property?
Answer:
chemical
Explanation:
Salt changes the chemical makeup of the water and allows it to get colder than what it would normally freeze at.
Listening is a more complex process than hearing.
Arent listening and hearing and listening the same thing.
if a baloon filled with dry hydrogen weighs 35 gram,but weighs 440 grams when filled with the vapour of an organic compound. calculate the vapour density and RMM of the organic compound.
Answer:
1) The vapor density of the organic compound is approximately 12.57
2) The relative molar mass (RMM) of the organic compound is approximately 25.14 grams
Explanation:
1) The mass of the balloon filled with dry hydrogen = 35 grams
The mass of the balloon filled with vapor of an organic compound = 440 grams
The vapor density = (Weight of a given volume of gas)/(Weight of equal volume of hydrogen)
The vapor density of the organic compound = (440)/(35) ≈ 12.57
The vapor density of the organic compound ≈ 12.57
2) The relative molar mass (RMM) = 2 × vapor density
The relative molar mass (RMM) of the organic compound = 2 × vapor density of the organic compound
The relative molar mass (RMM) of the organic compound ≈ 2 × 12.57 ≈ 25.14 grams
The relative molar mass (RMM) of the organic compound ≈ 25.14 grams
Which term represents the strength of the attraction an atom has for electrons in a chemical bond?
Answer:
Electronegativity (χ) is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself. Atoms with higher electronegativity attracts more electrons towards it, electrons are closer to that atom.
Answer:
Electronegativity
A boat sails into a bay and drops anchor. Several hours later, it is surrounded by mud. What
happened?
Answer:
the flow of the water pushed the mud around the anchor
Explanation:
The information regarding the mud should be explained below:
The following information should be considered:
In the case when it should be surronded by mud so there is low tide arise.it is occur at the time when the water retreats to its lowest level, moving away from the shore.Learn more: https://brainly.com/question/5763151?referrer=searchResults
If an element is on the 4th row of the periodic table...how many energy levels/rings would you need to draw a Bohr 's model of the element's atom?
Answer:
4 energy levels/rings
Explanation:
By the atomic model proposed by Niels Bohr, the electrons orbit around the nucleus in shells having different energy level each with the ability to contain a given maximum amount of electrons.
The closest shell to the nucleus named the K shell, can have a maximum of two electrons, the next shell known as the L shell can have 8 electrons while the next shell, M, can have a maximum of 18 electrons
The arrangement of the periodic table is based on the number and location of electrons such that elements in the 4th row (period 4 elements) have three completed energy levels/rings before, their valence ring making the total number of rings = 4 energy levels/rings.
what is the most reactive metal in Period 4 of the periodic table?
According to the electronic configuration, the most reactive metal in Period 4 of the periodic table is potassium.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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GUYS I NEED THIS ASAP
describe how electricity moves through wires
The solubility of gas in water at 25 C and 1.0 atm pressure of oxygen is 0.061 g/ L. What would the pressure be if the solubility of oxygen water at 25 C is 0.075 g/L
Answer:
P2 = 1.2265 atm (Approx)
Explanation:
Given:
Water temperature = 25 degree Celsius
Pressure = 1 atm
So,
P1/P2 = C1/C2
1 / P2 = 0.061 / 0.075
P2 = 1.2265 atm (Approx)
For each successive electron removed from an atom, the ionization energy
Select one:
a. increases.
b. decreases.
C. remains the same.
d. shows no pattern.
the answer is:
a. increases
a. increases.
Ionization energy:The amount of energy required to remove an electron from an isolated atom or molecule.
→ Trend for Ionization energy:
First ionization energy generally increases as you move left to right across a period. This is due to increasing nuclear charge, which results in the outermost electron being more strongly bound to the nucleus.First ionization energy generally decreases as you move down a group. This is because the outermost electron is, on average, farther from the nucleus, meaning it is held less tightly and requires less energy to remove.Thus, for each successive electron removed from an atom, the ionization energy increases.
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How many moles of Mg2+
are in 6.4 X1022 ions?
Answer:
0.11 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{6.4 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.10631229...[/tex]
We have the final answer as
0.11 molesHope this helps you
What is the formal charge of carbon in CO?
|C≡O|
Answer:
FC of C = -1
General Formulas and Concepts:
Lewis Dot StructuresResonance StructuresFormal Charge: FC = # of valence e⁻ - # of lone e⁻ - # of bondsExplanation:
Step 1: Define
Carbon (C)
4 valence e⁻2 lone e⁻3 bondsOxygen (O)
6 valence e⁻2 lone e⁻3 bondsStep 2: FC of C
Substitute: FC = 4e⁻ - 2e⁻ - 3Subtract: FC = -1