Answer:
0.4589J/g°C
Explanation:
Heat energy = 1050J
Mass of iron = 220.0g
Initial temperature (T1) = 10°C
Final temperature (T2) = 20.4°C
Heat energy = mc∇T
Q = mc∇T
Q = heat energy
M = mass of the substance
C = specific heat capacity of the substance
∇T = change in temperature = T2 - T1
Q = m×c×(T2 - T1)
1050 = 220 × c ×(20.4 - 10)
1050 = 220c × (10.4)
1050 = 2288c
c = 1050 / 2288
C = 0.4589J/g°C
The specific heat capacity of iron is 0.4589J/g°C
Answer:
0.4589 J g^-1 K^-1 IS THE SPECIFIC HEAT OF IRON.
Explanation:
Specific heat of iron can be calculated using the heat of reaction formulae
Heat = mass * specific heat * ( T2-T1)
H = m c (T2-T1)
c = H / m * (T2-T1)
H = 1050 J
m = 220.0 g
T2 = 20.4 ° C = 20.4 + 273 = 293.4 K
T1 = 10.0 °C = 10 + 273 K = 283 K
so therefore:
c = 1050 / 220 * ( 293.4 - 283) K
c = 1050 / 220 * 10.4
c = 1050 / 2288
c = 0.4589 J g^-1 K^-1
The specific heat capacity of iron is 0.4589 J g^-1 K^-1
Concentration and ion moles are equal only when volume is what ?
Concentration and ion moles are equal only when volume is 1. Of 1.0 x 10-6 and 1.0 x 10-4, the larger number is 1.
The concentration of ions in a solution depends on the mole ratio. The molarity is the moles per solute upon the value of the solution. The official symbol of molarity is the concentration (c)
The concertation is the ratio or the amounts of solute per amount of solution. Molarity is the unit of concentration that relates to the number of moles solute per liter of solution. Molarity is moles of solute / 1Lt of solution. Moles are equal only when the volume is indirectly proportional to the solution.Learn more about the concentration and ion moles that are equal.
brainly.com/question/23314887.
Why does burning fossil fuels put ecosystems under pressure?
Answer:
When fossil fuels are burned, carbon- dioxide and other greenhouse gases are released which trap the Sun's heat and can lead to global warming. The over heating of the atmosphere can put ecosystems under pressure especially the tundra regions.
Describe How do you make a metal object such as a nail into a magnet? What happens to make it magnetic?
Answer:
Stroking a magnet across it or high voltage
Explanation:
Stroking a magnet across it causes the alignment of the domain, making it magnetic temporarily. Also, high voltages from batteries can make it magnetic too, doing the same thing.
What factor is responsible for keeping the inner core in a solid state?
O A. High temperature
OB. High pressure
O c. Strong magnetism
O D. Strong electricity
SUBMIT
Answer:B should be the right answer “High pressure”
Explanation:
What does hydropower rely on to create energy? A. heat from Earth's interior B. energy from the sun C. biomass D. flowing water
Answer:
D. flowing water
Explanation:
Due to flowing water, that helps create energy. It was used by farmers as far back as ancient Greece for mechanical tasks like grinding grain. Hydropower is also a renewable energy source and produces no air pollution or toxic byproducts
The particle picture is best described as
a) a liquid compound
b) a liquid element
c) a solid element
d) a solid compound
e) a liquid mixture
According to most scientists, cold fusion
will not be a practical source of energy on Earth.
would be a practical source of energy on Earth if it were less expensive.
will be a practical source of energy on Earth within the next few decades.
will always continue to be a practical source of energy on Earth.
Answer
A IS THE ANSWER
Explanation:
A: will not be a practical source of energy on Earth.
According to most scientists, cold fusion will not be a practical source of energy on Earth.
What is cold fusion?Cold fusion is a hypothesized type of nuclear reaction that would occur at, or near, room temperature. It is usually regarded as the non practical source of energy on earth.
Thus, according to most scientists, cold fusion will not be a practical source of energy on Earth.
Learn more about cold fusion here: https://brainly.com/question/1311669
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8 points
11. Humans have negatively impacted the environment for
years. Which
events represent ways humans have harmed the environment. (Choose all
that apply.)
burning fossil fuels
minning
planting trees
using solar power
using fertilizers
recycling
(There’s more than one answer btw)
Answer:
Burning Fossil Fuels
Mining
Using Fertilizers
Arc AB is One-sixth of the circumference of a circle. What is the radian measure of the central angle?
A.)StartFraction pi over 6 EndFraction
B.)StartFraction pi Over 3 EndFraction
C.)StartFraction 2 pi Over 3 EndFraction
D.)StartFraction 5 pi Over 6 EndFraction
THE ANSWER IS B!!!
Answer:
?
Explanation:
Speed is calculated by taking
divided by time.
Save and Exit
Next
Submit
Mark this and return
Answer:
Look speed is calculated by using formula
Speed(s)=distance travellelled (d) / total time taken (t)
s=d/t
It's unit is m/s
When a radioactive decay occurs what is released?
A. Only protons and neutrons
B. Only electrons
C. Protons/Neutrons, beta particle, gamma ray
D. Only gamma rays
When a radioactive decay occurs, protons/neutrons, alpha/beta particles and gamma rays are all released depending on the type of decay.
Help me please for brainliest and 10 points.
Answer:
The red arrow from igneous to sedimentary rock
Explanation:
When rocks are weathered and eroded, they become sediment. This sediment is later compacted and cemented to form sedimentary rock. Therefore, the red arrow going from igneous rock to sedimentary rock represents weathering and erosion.
which sequence ranks the chemical reactions in order from fastest to slowest
Answer:
Its C
Explanation:
Just did it
How many Oxygen elements are in a carboxylic acid
Answer:
Carboxylic acid, any of a class of organic compounds in which a carbon atom is ... to an oxygen atom by a double bond and to a hydroxyl group by a single bond. ... sour-milk products) and citric acid (found in citrus fruits), and many keto acids ...
Explanation:
Answer:
There a 2 oxygen elements in a carboxylic acid.
Explanation:
a hurricanes energy comes from
Answer:
Heat and water.
Explanation:
Increased evaporation means more water vapor in the air and more energy ready to be liberated in the hurricane's thunderstorms as water vapor condenses.
The Moon and stars seem to move from _____________________________ to __________________________________ across the night sky.
they seem to move from east to west
ˢᵒʳʳʸ ᶦᶠ ᶦᵗˢ ʷʳᵒⁿᵍ
How many moles of nitrogen gas (N2) are found?
Answer:
28.0134 moles
Explanation:
There are 28.0134 moles are found in nitrogen gas(N2).
Hope this helps!!! PLZ MARK BRAINLIEST!!!
Why do we not have solar and lunar eclipses every month?
Answer:
The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. ... This is why we don't get a lunar eclipse every month.
Explanation:
Answer:
Explanation:
Because the sun only overlaps the moon once every 2-3 years
Suppose you need to heat food. What wave type from the electromagnetic spectrum could you use?
Answer:
Microwave radiation
Explanation:
This radiation is the one used in microwaves.
Answer:
Infrared
Explanation:
Infrared light is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark. Infrared light has frequencies which are absorbed by some chemical bonds. The internal energy of the bonds increases when they absorb infrared light, which causes heating.
13. Which activity causes the amount of carbon dioxide to increase in the
atmosphere?
fishing
picking up trash
machine use in factories
using hydroelectric power
Answer:
C.
Explanation:
Using machines in factories increases the amount of carbon dioxide in environment.
Instructions
Look up(search for) the following words and learn to spell:
1. Incinerator.
2. Compositing.
3. Emission.
4. Biodegradable refuse.
5. Non-biodegradable refuse.
Answer:
What’s the question??
Explanation:
Answer:
Theres not a question for us to answer...
Given the reaction that occurs in an electrochemical cell:
Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s)
During this reaction, the oxidation number of Cu changes from
A) 0 to +2
B) 0 to –2
C) +2 to 0
D) –2 to 0
Answer:
c) +2 to 0
Explanation:
SO4 has a charge of -2, so the Cu attached to that has to be a +2 since the polyatomic molecule has no overall charge
Cu(s) is a solid metal and they have no charge, therefore it is zero
Copper undergoes Oxidation (gain of electrons)
is going from gas to plasma a chemical change?
Answer:
Yes from going to gas to plasma is a chemical change.
Explanation:
I hope this helps :)
A scientist has 0.12 miles of a gas at a pressure of 4.06 kPa and a volume of 14 liters in an enclosed container. What is the temperature of the gas in the container?
Answer:
56972.17K
Explanation:
P = 4.06kPa = 4.06×10³Pa
V = 14L
n = 0.12 moles
R = 8.314J/Mol.K
T = ?
We need ideal gas equation to solve this question
From ideal gas equation,
PV = nRT
P = pressure of the ideal gas
V = volume the gas occupies
n = number of moles
R = ideal gas constant
T = temperature of the gas
PV = nRT
T = PV / nR
T = (4.06×10³ × 14) / (0.12 × 8.314)
T = 56840 / 0.99768
T = 56972.17K
Note : we have a large number for temperature because we converted the value of pressure from kPa to Pa
Coal is burned in the atmosphere to release energy. Which gas is needed for burning to take place?
Answer:
Oxygen gas is needed for burning to take place.
Explanation:
I don't say you have to mark my ans as brainliest but if it has really helped you plz don't forget to thank me...
Copper and silver are two examples of atoms that will form a(n)
metallic bond
ionic bond
covalent bond
none of the above
Answer:
covalent bond is the answer
Answer:
covalent bond
That's your answer!!
A dipole consists of a positive charge and a negative charge. To
determine the electric potential at a position between the two charges
in an electric field created by a dipole, calculate the electric potential
generated by.
Answer:
k
Explanation:
Calculate the molality, freezing point, and
boiling point for each of the following water
solutions of nonionizing solutes:
1) 144 g of C6H1206 dissolved in 1000 g of H20
Answer: 1044
Explanation:
5.77 g of nitrogen react with excess hydrogen producing 6.83 g of ammonia what is the percent yield. Determine/Label the actual yield, theoretical yield, and the percent yield for the reaction. N2+3H2=2NH3
Answer:
Percentage yield is 41.21%
Explanation:
Equation of reaction,
N₂ + 3H₂ → 2NH₃
Actual NH3 = 6.83g
Mass of N2 = 5.77g
Theoretical yield = ?
5.77g of N2 = 6.83g of NH3
14g of N2 = xg
X = (14 × 6.83) / 5.77
X = 95.62 / 5.77
X = 16.57g of NH3
Theoretical yield of NH3 is 16.57g
Percentage yield = (actual yield / theoretical yield) × 100
% yield = (6.83 / 16.57) × 100
% yield = 0.4121 × 100
% yield = 41.21%
The percentage yield of NH3 is 41.21%
PLEASE HELP
Why do atoms form bonds with other atoms? Provide example using octet rule
Answer:
For Covalent bonds, atoms tend to share their electrons with each other to satisfy the Octet Rule. It requires 8 electrons because that is the amount of electrons needed to fill a s- and p- orbital (electron configuration); also known as a noble gas configuration
Explanation: