A coffee cup calorimeter contains 153.21 g of water at 22.50 °C. A 65.454 g piece of iron is heated to 101.62 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 25.68 °C. The specific heat capacity of iron is 0.449 Jg·K and the specific heat capacity of water is 4.184 Jg·K. How much heat, , is lost by the piece of iron?
Answer:
Q = 2232J
Explanation:
In the system, the energy that is lost by the iron is:
Q = S*ΔT*m
Where Q is heat, S is specific heat of iron ΔT is change in temperature and m is mass of the piece of iron.
S = 0.449J/gK
ΔT = 101.62°C - 25.68°C = 75.94°C
m = 65.454g
Q = 0.449J/gK*75.94°C*65.454g
Q = 2232J
Which of the following properties would a substance that has metallic bonding
normally have?
I. thermal conductivity
II. electrical conductivity
III. malleability
IV. ductility
Answer:
I, II, III,IV
Explanation:
Metals are known to possess metallic bonds. In a metallic bond, electro-positive metals loose electrons which form a cloud of electrons which exerts an attractive force on the positive metallic ions. This attractive force holds the metal atoms together in the crystal lattice.
The physical properties of metals include;
I. thermal conductivity
II. electrical conductivity
III. malleability
IV. ductility
Hence, substances that exhibit properties I-IV are metals and have metallic bonds.
The following properties which a substance that has metallic bonding
normally have include
thermal conductivityelectrical conductivitymalleabilityductilityMetals are elements which have metallic bonding which is always strong as
it helps to form a lattice.
Metals are good conductors of heat and electric current , they can also be
bent in to different shapes . This means it has all the properties listed above.
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Mu Cephei is no longer considered a main sequnce star. This means it has run out of:
A:hydrogen
B:Helium
C:Oxygen
D:Iron
Answer:
A: Hydrogen
Explanation:
Plz give me brainliest it really helps!
Which organelle captures sunlight and helps in food synthesis?
Answer:
Chloroplasts! :)
Explanation:
Hope this helps
Write a essay on endangered animals
A: Inquiring and analysing
i. explain and justify the need for a solution to a problem
ii. state and prioritize the main points of research needed to develop a solution to the problem
iii. describe the main features of an existing product that inspires a solution to the problem
iv. present the main findings of relevant research
B: Developing ideas
i. develop a list of success criteria for the solution
ii. present feasible design ideas, which can be correctly interpreted by others
iii. present the chosen design
C: Creating the solution
i. outline a plan, which considers the use of resources and time, sufficient for peers to be able to follow to create the solution
ii. demonstrate excellent technical skills when making the solution
iii. follow the plan to create the solution, which functions as intended
iv. list the changes made to the chosen design and plan when making the solution
D: Evaluating
i. outline simple, relevant testing methods, which generate data, to measure the success of the solution
ii. outline the success of the solution against the design specification
iii. outline how the solution could be improved
iv. outline the impact of the solution on the client/target audience
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Answer:
WHATS OOP Lucy???
What is the mass in grams of 10 moles of ammonia, NH3?
A.
?
1.7 grams
B.
?
27 grams
C. ?
170 grams
D
?
0.587 grams
Answer:
C. 170 g.
Explanation:
multiply given moles by the molar mass of ammonia.
Separate the following gene sequence into codons: TACGTCTTACGCTATGTC
Answer really quick plssss
Answer:
I think it's AUGCAGAAUGCGAUACAG
What do you think causes a lunar eclipse? (Use your knowledge of solar eclipses and feel free to run the Gizmo to help you.)
Moon reflects the light frim the sun, thats why we are able to see it and it shines in the night. But, we know that Earth revolves around Sun and Moon revolves around Earth. During this revolution, Earth and Moon comes in a position when Earth is in the middle of the Moon and Sun. So, it blocks the light of Sun frim reaching Moon. Hence, we see no reflection and it causes Lunar eclipse.
Answer:
A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth's shadow, some sunlight reaches the moon. The sunlight passes through Earth's atmosphere, which causes Earth's atmosphere to filter out most of the blue light.
Explanation:
what volume of water has a mass of 1 kg
Answer:
[tex]V=0.001\ m^3[/tex]
Explanation:
Mass, m = 1 kg
The density of water, d = 1000 kg/m³
We need to find the volume of water. The formula for the density of an object is equal to mass divided by volume. Its formula is :
d = m/V
V is the volume of water
[tex]V=\dfrac{m}{d}\\\\V=\dfrac{1\ kg}{1000\ kg/m^3}\\\\=0.001\ m^3[/tex]
So, the volume of water is [tex]0.001\ m^3[/tex].
Answer:
Volume of water has a mass of 1 kg is explained below in details.
Explanation:
One liter of h2O has a volume of approximately specifically one kilogram when estimated at its maximum frequency, which happens at about 4 °C. It observes, therefore, that thousand of a liter, recognized as one milliliter (1 mL), of h2O has a volume of about 1 g; 1000 liters of h2O has a volume of about 1000 kg (1 tonne).
what describes a property of all elements
Compute the number of ions in 58.5 g oh nacl
Answer: Explanation:
58.5 g of Na Cl = 1 mole 5.85 g ofNaCl = 1 X 5.85/58.5 = 0.1 mole Each molecule of NaCI contains one Na ion and one Cl ion = 2 ions Total moles of ions in 0.1 mole of NaCI = 2 x 0.1 = 0.2 moleswhat should we use in soap making process:-
a) potassium hydroxide
b) sodium hydroxide (lye)
Explain why it should be used
Sodium hydroxide, with the formula NaOH, is usually used in products as a pH adjuster. It's also used in soap-making to turn fats and oils into soap. You can find sodium hydroxide (also called caustic soda or lye) in its pure form in the cleaning aisle, since it's also really handy for clearing up clogged drains.
The diagram below shows the energy conversions of the Krebs cycle, which is part of cellular respiration. The U-shaped
arrows that show changes for NAD, FAD, and ADP molecules represent energy conversions. From each glucose
molecule, two acetyl-CoA molecules are made for the Krebs cycle.
NADH
NAD+
FADH2
FAD
Acetyl-CoA
СС
COA
COA
Citric Acid
4-carbon
compound
CCCC
co&Co
ADP
ATP
CO2
NADH
NAD+
5-carbon
compound
CCCCC
NAD+
NADH
CO.
How many energy conversions occur when both acetyl-CoA molecules go through the Kerbs cycle
A 5
B 6
C 10
D 12
Answer:
b
Explanation:
Many of the lunar craters are due to volcanic eruptions true or false
Answer:
false
Explanation:
Craters on the Moon are caused by asteroids and meteorites colliding with the lunar surface. The Moon's surface is covered with thousands of craters. ... It also has very little geologic activity (like volcanoes) or weathering (from wind or rain) so craters remain intact from billions of years.
I NEED HELP RN 40 POINTS
Answer:
B.) Adding a source of carbon dioxide to the water.
Explanation:
I had that question too.
Which of these statements accurately describes monomers?
Monomers are macromolecules.
Monomers contain double bonds.
Monomers are made of repeating units.
Monomers contain bonds between metals.
Answer:
Monomers contain bonds between metals
Answer:
B: Monomers contain double bonds
Explanation:
I got it right on Edge
What is the amplitude ?
Answer: The amplitude is a measure of the strength or intensity of the wave
Explanation: when looking at a sound wave, the amplitude will measure the loudness of the sound.
help me please i need help cuz its due today
Answer:
I believe the answer is a. I hope this helps
how many moles of oxygen molecules can be produced from 6 moles of lead oxide
Answer:
Moles of oxygen molecules produced = 3 mol
Explanation:
Given data:
Moles of oxygen molecules produced = ?
Number of moles of lead oxide decomposed = 6 mol
Solution:
Chemical equation:
2PbO₂ → 2PbO + O₂
Now we will compare the moles of oxygen and lead oxide.
PbO₂ : O₂
2 : 1
6 : 1/2×6 =3 mol
three moles of oxygen molecules are produced.
can yall help me wit this?
Answer:
the color change
help help help plsss
Answer:
4.58×10^3
3.72×10^7
Explanation:
3.8×10^2 =380
+ 4.2×10^3=4200
= 4580 = 4.58×10^3
1. Which of the following is Newton's First Law? *
A-An object in motion will stay in motion unless acted on by a balanced force.
B-An object at rest will stay at rest and an object in motion will stay in motion in the same speed and same direction unless acted on by an unbalanced force.
C-Moving objects will stay in motion forever
Answer:
B .............
hope it helps
Answer: B
Explanation:
1. Two substances, both solids, start at the same temperature. You transfer
the same amount of energy into both solids, but substance 1 becomes a
liquid before substance 2. Which substance has a stronger molecular
attraction?
A Substance 1
B Substance 2
Please help I will give you Brainlyest
Answer:
B substance 2
Explanation:
1. Two substances, both solids, start at the same temperature. You transfer
the same amount of energy into both solids, but substance 1 becomes a
liquid before substance 2. Which substance has a stronger molecular
attraction?
A Substance 1
B Substance 2
Please help I will give you Brainlyest
Substance 2 has a stronger molecular attraction.
What are solids?Solid is one of the four fundamental states of matter. The molecules in a solid are closely packed together and contain the least amount of kinetic energy. A solid is characterized by structural rigidity and resistance to a force applied to the surface.
Both solids are supplied with an equal amount of energy. Out of both substances, substance 2 has a stronger molecular attraction due to which it can not easily change into a liquid while substance 1 has a lesser molecular attraction so supplying of few amounts of heat will change substance 1 into a liquid state.
Hence, Substance 2 has a stronger molecular attraction.
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What are the atoms found at the bottom of the periodic table known as?
Which of the following best describes the relationship between the speed of sound and the type of medium?
A.
Sound travels slower in air because of the large distance between air particles
B.
Sound travels slower in solids because of the small distance between solid particles
C.
Sound travels slower in air because of the small distance between air particles
D.
Sound travels slower in solids because of the large distance between solid particles
Answer:
A. Sound travels slower in air because of the large distance between air particles
Explanation:
Sound is a mechanical wave that requires a medium for its propagation. Without a medium, sound cannot go through easily or readily. This implies that sound cannot be propagated through a vacuum.
A vacuum is an empty space without any particles in side. Sound waves travel fastest the most in solids because the particles are dense and close to one another. The speed of sound in air is the least because of the large distance between air particles. Therefore, the speed of sound is medium dependentHow many chlorine atoms are on the products side of the reaction 2 Li +
MgCl2 → 2 LiCl + Mg?*
Answer:
2 chlorine atoms on the product side.
Which of the following redox conditions will produce a spontaneous reaction?
A. The voltage of the reduction half-reaction is negative.
B. The voltage of the reduction half-reaction is positive.
C. The sum of the voltages of the half-reactions is negative.
D. The sum of the voltages of the half-reactions is positive.
Answer:
D. The sum of the voltages of the half reactions is positive.
Explanation:
It's correct on apeex
The statement, that describes the redox conditions will produce a spontaneous reaction is "the sum of the voltages of the half-reactions is positive."
What is spontaneous reaction?A spontaneous reaction is one that favors the creation of products under the conditions of the reaction. It can move in a specific direction without being propelled by an external source of energy. If the standard electrode potential for the redox reaction is positive, the reaction is spontaneous.
If [tex]E^{0}[/tex] (redox reaction) is positive, the reaction will move onward (spontaneous). The redox conditions will cause a spontaneous reaction, and the sum of the half-reaction voltages is positive. Hence the correct option is D.
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How many liters of water are needed to dissolve 75.0 grams of NaOH to prepare a 1.00-M solution?
Answer:
About 500
Explanation:
Bc i used my calc
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How many grams are there in 4.30 x 10²⁶ molecules of H₂SO₄?
Mass of H₂SO₄ : 69,972 g
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
moles of H₂SO₄ :
[tex]\tt mol=\dfrac{N}{No}\\\\mol=\dfrac{4.3\times 10^{26}}{6.02\times 10^{23}}\\\\mol=7.14\times 10^2[/tex]
mass H₂SO₄ (MW=98 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=7.14.10^2\times 98\\\\mass=69,972~g[/tex]
