Answer:
569K
Explanation:
Q = 3.5kJ = 3500J
mass = 28.2g
∅1 = 20°C = 20 + 273 = 293K
∅2 = x
c = 0.449
Q = mc∆∅
3500 = 28.2×0.449×∆∅
3500 = 12.6618×∆∅
∆∅ = 3500/12.6618
∆∅ = 276.4220
∅2 - ∅1 = 276.4220
∅2 = 276.4220 + ∅1
∅2 = 276.4220 + 293
∅2 = 569.4220K
∅2 = 569K
When the temperature is increased, there is the increase in thermal energy of the system. The final temperature of the iron in kelvins is 570 K.
What is energy?The energy is the ability to do work.
Given is the energy Q = 3.5 kJ = 3500 J, mass of sample m = 28.2 g, specific heat of iron Cp = 0.449 J(g•K).
The initial temperature in kelvins is T1 = 20°C = 20 + 273 = 293K
The heat is related to the temperature difference as
Q = m c ∆T
Substitute the values into the expression,
3500 = 28.2 × 0.449 × ∆T
3500 = 12.6618 × (T2 -T1)
T2 - T1 = 276.4220
T2 = 276.4220 K +293 K
T2 = 569.4220K
The temperature of the iron is approximately 570 K.
Thus, the final temperature of the iron in kelvins is 570K.
Learn more about energy.
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1. Which group of elements does not get an electronegativity value
because they do not form compounds? *
Alkali Metals
Alkaline Earth Metals
Boron Group
Carbon Group
Nitrogen Group
Oxygen Group
Answer:
noble gases from what i learnt
What is the result of adding 2.5 × 10³ and 3.5 × 10²?
2.9 × 10³
6.0 × 10⁵
2.9 × 10²
6.0 × 10³
Answer:
A
Explanation:
It is correct please I hope it helps! :)
The Kₐ of carbonic acid is 4.3 x10⁻⁷ . H₂CO₃ ⇄ H⁺ + HCO₃ ⁻ This means that H₂CO₃ is a
A) Good hydrogen-ion acceptor.
B) Poor hydrogen-ion acceptor.
C) Good hydrogen-ion donor.
D) Poor hydrogen-ion donor.
Answer:
A good hydrogen ion acceptor
SOMEONE SMART HELP PLS!!
someone please ASAP
the options are
1. BF.
2.B4
3.B2F2
3.BF3
Answer:
B4
Explanation:
good day
Matching
Match each definition with the correct term.
Definitions
_____ 1. device for measuring temperature
_____ 2. total kinetic energy of particles of matter
_____ 3. amount of energy needed to raise the temperature of 1 gram of a substance by 1 °C
_____ 4. average kinetic energy of particles of matter
_____ 5. scale for measuring temperature
From the CK-12 Physical Science For Middle School Workbook
_____ 6. transfer of thermal energy between objects with different temperatures
_____ 7. measure that affects the thermal energy of matter but not its temperature
Terms
thermal energy
heat
temperature
thermometer
mass
Celsius
specific heat
Answer:
1. thermometer
2. thermal energy
3. specific heat
4. temperature
5. Celsius
6. heat
7. mass
Thermal energy would naturally flow between objects at which temperatures?
O A. from 5°C to -5°C
OB. from 15°C to 15°C
OC. from 35°C to 45°C
OD. from -15°C to 15°C
Answer:
i think the answer is letter C. From 35°c to 45°c
Explanation:
sorry if it is wrong
Protons, Neutrons, and Electrons Practice Worksheet
Calculating the number of each particle in autor
Proton Atomic Number
Electrons Protons
Neutrons Atomic Mass - Atomic Number OR Big Small
0
Oxygen
15.000
Use the periodic table to find the numbers of protons, neurons, and electrons for some of the following
, ,
elements
Name of Element
Element
Symbol
Артіс
Numb
Proton
Neutron
electrons
Electrons
Number
B
11
5
5
6
5
Boron
Sadiun
24
11
Y
20
Copper
29
35
TC
43
PE
207
Thallium
204
81
Н.
0
Carbon
12
N
2
56
Calcium
SI
14
Argon
10
MO
12
Answer:
Sorry I am not good at chemistry
Explanation:
The characteristics of the atoms and the periodic table allow to find the result for the number of protons, neutrons and electrons, the results in the table
The periodic table is a graphic representation where the chemical elements are placed by their atomic number, this table is organized in row and columns, where the elements of the same column have similar properties.
The period table indicates the atomic number, which is the number of protons, and the atomic mass, which is the sum of the protons plus the neutrons.
The atoms are neutral entities therefore the number of electrons must be equal to the number of protons.
It is asked to calculate the number of electrons, protons and neutrons of various chemical elements
Element Sodium, symbol Na
Atomic number (Z) 11
Atomic weights (M) 24
The number of protons is equal to the atomic number
protons 11 protons
The number of neutrons is
# neutrons = M - Z
# neutrons = 24 -11
# neutrons = 13 neutrons
The number of electrons is equal to the atomic number
# electrons = 11
Element Yttrium, symbol Y
Atomic Number 39
Atomic mass 89
Protons 39
Neutrons = 89-39 = 50
Electrons 39
Element Copper, Symbol Cu
Atomic number 29
Atomic mass 64
protons 29
Neutrons = 64-29 = 35
Electrons 29
Element Technesium, Symbol Tc
Atomic number 43
Atomic mass 98
protons 43
neutrons = 98 -43 = 55
electrons 43
Element Lead, Symbol Pb
Atomic Number 82
atomic mass 207
protons 82
neutrons = 207 -82 = 125
electrons 82
Element Thalium, Symbol Ta
Atomic Number 81
atomic mass 204
protons 81
neutrons = 204 -81 = 123
electrons 81
Element Hydrogen, Symbol H
Atomic number 1
Atomic mass 1
protons 1
neutrons 0
electrons 1
Element Carbon, Symbol C
Atomic number 6
Atomic mass 12
Protons 6
neutrons = 12-6 = 6
electrons 6
Element Nitrogen, Symbol N
Atomic number 7
Atomic mass 14
protons 7
neutrons = 14-7 = 7
electrons 7
Element Barium, Symbol Ba
atomic number 56
atomic mass 137
protons 56
neutrons = 137-56 = 81
electrons 56
with these results we complete the following table
Element Symbol Protons Neutrons Electrons
Sodium Na 11 13 11
Yttrium Y 39 50 39
Copper Cu 29 35 29
Tecnetium Te 43 55 43
Lead Pb 82 125 82
Thallium Ta 81 123 81
Hydrogen H 1 0 1
Carbon C 6 6 6
Nitrogen N 7 7 7
Barium Ba 56 81 56
In conclusion using the characteristics of the atoms and the periodic table we can find the result for the number of protons, neutrons and electrons, the results in the table
Learn more here: https://brainly.com/question/11155928
How many moles are in 85.62 g of K,C03?
3. Ammonium hydroxide, known for its pH control abilities, is used in food production as an effective antimicrobial agent. What is the correct formula for ammonium hydroxide?
The study of chemicals and bonds is called chemistry.
The correct answer is [tex]NH_4(OH)[/tex].
Ammonium hydroxide is the base that helps to increase the ph of the solution and helps to neutralize the acidic effect.
The uses of ammonium hydroxide are as follows:-
Reduce the acidic effectIn bakeryIn medicineThese are the use of ammonium hydroxide.
Hence, the correct answer is [tex]NH_4(OH)[/tex].
For more information, refer to the link:-
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24. When the equation
Al + O2
A1,03
is properly balanced, which of the following terms appears?
(a) 2 A1
(c) 3 A1
(b) 2 Al2O
(d) 2 02
Answer:
Explanation:
3
Explanation:
The reaction expression is given as:
Al(OH)₃ + HNO₃ → H₂O + Al(NO₃)₃
To solve this problem, let us assign coefficient a,b,c and d to each specie;
aAl(OH)₃ + bHNO₃ → cH₂O + dAl(NO₃)₃
Conserving Al : a = d
O: 3a + 3b = c + 9d
H: 3a + b = 2c
N: b = 3d
let a = 1 , d = 1, b = 3 , c = 3
Multiply through by 3;
a = 1, b = 3, c = 3 and d = 1
Al(OH)₃ + 3HNO₃ → 3H₂O + Al(NO₃)₃
what are the products of the reaction with their coefficients C2H18+O2?
Answer:
2C2H18 + 13O2 → 4CO2 + 18H2O (I balanced your equation)
Products - CO2 & H20
Where does Earth's Internal Energy Come From? *
Answer:
There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements.
Answer:
Internal sources of energy mean they are coming from within the earth
Explanation:
If the volume is 500 mL, the mass of air is 60g (molar mass of air= 29g/mol), and the temperature is 0 C, what is the pressure inside the bottle?
Answer:
The pressure inside the bottle is 92.678 atm.
Explanation:
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
In this case:
P= ?V= 500 mL= 0.500 Ln= 60 g* [tex]\frac{1 mole}{29 g}[/tex] = 2.07 molesR= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= 0 C= 273 KReplacing:
P* 0.500 L= 2.07 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] * 273 K
Solving:
[tex]P=\frac{2.07 moles* 0.082 \frac{atm*L}{mol*K} * 273 K}{0.500 L}[/tex]
P= 92.678 atm
The pressure inside the bottle is 92.678 atm.
553.5 mL ?:cm^3
how do i get my answer? and what is the answer?
Answer:
553.5 cm3
Reason:
1 mL = 1 cm3
What would be the new volume if the pressure on 600 mL is increased from 90 kPa to 150 kPa?
Explanation:
What would be the new volume if the pressure on 600 mL is increased from 90 kPa to 150 kPa? V = Pu V₂ = 360 mL ~ 400 mL 6.
What role does photosynthesis have in the carbon cycle?
A. Plants remove Co, from the atmosphere and use it to create
glucose
B. Plants add co, into the atmosphere after photosynthesis
C. Animals and plants decompose during photosynthesis
D. CO, is removed from the atmosphere during respiration
Answer:
I think option A..
Explanation:
hope it's help uu
if wrong then sry
Answer:
A. Plants remove Co, from the atmosphere and use it to create glucose
which property below will be the best one to use to most accurately identify a pure substance because it is unique to each pure substance?
hardness
brittleness
odor
density
Match the items to use the analogy of time to the vocabulary of chemistry.
Answer:
1 year- 1 mole
time in general- amount of matter
1 second- 1 atom/ particle
Answer:
1 Year => 1 Mole
Time in General => Amount of Matter
1 Second => 1 Atom/Particle
Explanation:
These pairs make the most sense.
Hope it helps!!!
PLS HELP ME I HAVE TILL 12
A student collects oxygen gas by displacing water in a test tube. The gas in the tube has a total pressure of 92.3kPa. If the water has a vapor
pressure of 1.82kPa, what is the pressure of oxygen?
a 90.5kPa
b 94.1kPa
c 168.0kPa
d 50.7kPa
Answer:
alright bud lets see hmm.... the answer is a. 90.5kpa
Explanation:
92.3 kPa - 1.82 kPa = 90.5 kPa
keep up your hope also corrected me if a am wrong in anyway! :)
What type of reaction is the following:
2 Na + Cl2 -> 2 NaCl
decomposition
double replacement
single replacement
synthesis
Answer:
Synthesis :)
Explanation:
Can somebody give me some backup for this question?
How many moles are in 45.5 g of P2O5 ?
Answer:
0.327214 mol
Explanation:
45.5/278.106=0.163607
Then, 0.163607x2= 0.327214
1. Convert 1.5 moles to molecules 2. Convert 1.204x10^24 molecules to moles 3. Convert 1.5x10^20 molecules to moles 4.Convert 0.35 moles to molecules 5. Convert 15 moles H2O to atoms 6.Convert 0.75 moles CaSO4 to atoms
Answer:
Explanation:
1.5 moles to molecules
1 mole = 6.02 x 10²³ molecules
1.5 moles = 6.02 x 1.5 x 10²³ molecules
= 9.03 x 10²³ molecules
2 )
Convert 1.204x10²⁴ molecules to moles
6.02 x 10²³ molecules = 1 mole
1.204x10²⁴ molecules = 1.204x10²⁴ / 6.02 x 10²³ moles
= 2 moles
3 ) Convert 1.5x10^20 molecules to moles
6.02 x 10²³ molecules = 1 mole
1.5x10²⁰ molecules = 1.5x10²⁰ / 6.02 x 10²³ moles
= .25 x 10⁻³ moles
= 2.5 x 10⁻⁴ moles .
4 )
Convert 0.35 moles to molecules
1 moles = 6.02 x 10²³ molecules
.35 mole = 6.02 x .35 x 10²³ molecules
= 2.1 x 10²³ molecules.
5 )
Convert 15 moles H₂O to atoms
1 moles = 6.02 x 10²³ molecules
15 moles = 15 x 6.02 x 10²³ molecules
= 90.3 x 10²³ molecules of water
1 molecule of water has 3 atoms in total
90.3 x 10²³ molecules of water = 90.3 x 3 x 10²³ atoms
= 270.9 x 10²³ atoms .
6 )
0.75 moles CaSO₄ to atoms
1 moles = 6.02 x 10²³ molecules
.75 moles = .75 x 6.02 x 10²³ molecules of CaSO₄
= 4.515 x 10²³ molecules of CaSO₄
1 molecule of CaSO₄ = 6 atoms
4.515 x 10²³ molecules of CaSO₄ = 6 x 4.515 x 10²³ atoms
= 27.09 x 10²³ atoms .
How many atoms are there in 0.655 moles of C6H14?
Answer: 3.94 x 10^23 molecules
Explanation: hope this helps!
PLEASE HELP I WILL GIVE YOU 100 POINTS ON THE NEXT QUESTION
How the Masses of Objects Affect the Gravitational Force between Them
Use the table to explain how the masses of Objects 1 and 2 relate to the gravitational force between them. Be sure to: Describe the scenario.
Explain the table headings to introduce the data in the table.
Use the data to show a trend.
Summarize the information from the table in a sentence, showing the relationship between the masses of objects and the gravitational force between the objects.
d) Place text in the notes section below the slide explaining the information presented on it. This text will act as the script for your presentation.
Answer:
okay so lets say i drop a ball that weighs 2 pounds off a building and a ball that ways 1 pound off the building at the same time the lighter ball would hit the ground first because its lighter and so they heavier it is the slower it drops the lighter it is the faster it drops
Explanation:
Answer:
Hello, I don't really have an actual answer, but I was hoping you could explain it to me? I have the same project and I am kind of confused.
Explanation:
Thank you and have a great day :)
Is it true or false?
Answer:
false
Explanation:
because i know it
What is the mass of 22 mL of gold, which has a density of 19.3 g/mL? Show your work or explain your steps.
Answer:
424.6g
Explanation:
Density is a measure of a substance's mass over its volume.
d = m/v
we can rearrange this equation to solve for mass algebraically.
dv = m
We can then substitute the given values for our variables in the problem and solve for our answer.
22mL(19.3g/mL)= 424.6g
HELP ME PLEASE I NEED THE ANDEER NOW
How much energy is released when 150 grams of water vapor condense at 100°C?
Answer:
Its on the picture.
Explanation:
Correct me if I am wrong :>
But hope it helps!
Can you please mark me as brainlest?
Its ok if you don't want to :>