Answers
Answer:13132
Explanation:123123
Related Questions
1. Calculate the amount of heat required for 25.0 grams of water tochange from 10 degrees Celsius to 30 degrees Celsius.
2. 50.0 grams of water at 100 degrees Celsius evaporated to water vapor 2 points
at 100 degrees Celsius. Calculate the amount of heat required for this
conversion.
3. A student measured 15.0 grams of ice in a beaker. The beaker was then
placed on a hot plate where it was heated uniformly for a certain amount
of time. During the melting process of the ice, the student noted that the
temperature was at 0 degree Celsius. When all the ice converted to water,
the final temperature was also at 0 degree Celsius. How much heat was
used to melt the ice?
4. If 5.0 grams of water was cooled from 50 degrees Celsius to 40
degrees Celsius, then calculate the amount of heat released by the water.
5. A certain amount of water used exactly 84.0 Joules of heat energy to
change from 25.0 degrees Celsius to 35 degrees Celsius. How many
grams of water was used?
Please help me
Answers
Answer:
Explanation:
1 )
amount of heat required = mass x specific heat x rise in temperature
= 25 x 4.2 x 20 = 2100 J .
2 )
Amount of heat required
= mass x latent heat of vaporisation
= 50 x 2260 = 113000 J .
3 )
Amount of heat required in melting the ice
= mass x latent heat of fusion
= 15 x 336 = 5040 J
4)
heat released in cooling water
= mass x specific heat x fall in temperature
= 5 x 4.2 x 10
= 210 J
5 )
amount of heat required = mass x specific heat x rise in temperature
84 = mass x 4.2 x 10
mass = 2 grams .
can someone help me with this
Answers
heyyyyyyy......................
Answers
Answer:
helllllooooooo hi how is life
Answer:
hiiii
Explanation:
Which object is an insulator?
A. Iron
B. Copper
C. Plastic
D. Salt water
Answers
Answer:
c. plastic is an insulator
Explanation:
a and b are metals which are conductors and d contains water which is also a conductor
true or false: ur hearts a muscle
Answers
Answer: True
Explanation:
1. What is the name of the ion formed from the sulfur atom?
Sulfuride
Sulfurous
Sulfur
Sulfide
2. Which of the following elements does not form an ion with a charge of +1
A:Sodium
B:Fluoride
C;Potassium
D:Hydrogen
3. The chemical properties of an element are largely determined by____
A:The number of valence electrons they have
B:The number of total protons the element has
C:The number of total ions the element has
D:The number of total electrons the element has
5. How does magnesium obey the octet rule when reacting to form compounds?
A. It gives up electrons
B. Magnesium does not obey the octet rule.
C. It gains electrons
D. It does not change its number of electrons
6. How many electrons does strontium have to give up to achieve a noble gas electron configuration?
0
1
2
3
Answers
Answer:
1 sulfide
2 Fluoride
3 A
5 A
6 2
what is the soul of water?
Answers
Answer:
soul eater is a social enterprise
Explanation:
they donate a minimum of 10 percent to the soul community . soul water was born from the idea that everyone should be able to enjoy quality drinking tap water
Which of these could create static electricity?
A.Plugging in a vacuum
B.Running a blender
C.Combing one's hair
D.Turning on a car
Answers
c well actually I remember being tought this but I cant remember it 100
Because it’s like when you rub a ballon on your hair and your hair becomes static. And because if you look at the other options and do process of elimination you would get C.
A- that’s just electricity from a plug in
B- same thing as A
And
D- that’s with a engine and gas
(Hopefully this helped.)
And from google “Using plastic combs and brushes on your hair can cause static electricity, much like that old trick you did as a kid of making your hair stand up by rubbing a plastic balloon on it.”
Which of the following structures are found in eukaryotes, but not prokaryotes?
A) Cytosol
B) Cilia
C) Golgi body
Answers
Answer:
B
Explanation:
asthenosphere
OA.
oceanic continental convergent boundary
B.
oceanic-oceanic convergent boundary
O c.
divergent boundary
D.
transform boundary
Awnser I know if ur right I’ll mark brainlesst
Answers
Answer:C
Explanation:The samples are composed of different proportions of copper and zinc
PLEASE HELP!
How many moles of NaOH would produce 10 moles of water in this reaction?
2NaOH + H2SO4 → Na2SO4 + 2H20
Answers
Answer:
The correct answer is 10
Compare the viscosity property of solid and liquid.
Answers
Answer
There is nothing like viscosity in solid because most of the solids usually have a rigid body. This is due to strong intermolecular forces. And it is due to this strong force between the molecules that they are unable to move and they remain fixed at their position. Some solids such as graphite which have layered structure, don't possess the property of viscosity, because of the strong force between the layers.
Explanation:
Viscosity is the property of a fluid that opposes the relative motion between two surfaces of the fluid that are moving at different velocities. In simple terms, viscosity means friction between the molecules of fluid.
FOR EXAMPLE
water is "thin", having a low viscosity, while vegetable oil is "thick" having a high viscosity
A laboratory hydrogen generator collects the gas produced by bubbling it through water. The total pressure of the gas collected is 751 mmHg. The temperature is 34 °C, at which water vapor pressure is 40.0 mmHg. Calculate the partial pressure of the hydrogen.
Answers
Answer:
[tex]711\ \text{mmHg}[/tex]
Explanation:
[tex]P_{total}[/tex] = Total pressure = 751 mmHg
[tex]P_{water}[/tex] = Vapor pressure = 40 mmHg
[tex]P_{gas}[/tex] = Pressure of gas
The total pressure in a system is given by Dalton's law
[tex]P_{total}=P_{gas}+P_{water}\\\Rightarrow P_{gas}=P_{total}-P_{water}\\\Rightarrow P_{gas}=751-40\\\Rightarrow P_{gas}=711\ \text{mmHg}[/tex]
The partial pressure of the hydrogen is [tex]711\ \text{mmHg}[/tex]
PLEASE HELP ME ANSWER THE TWO MULTIPLE CHOICE QUESTIONS!!!
ITS FOR CHEM:(
I’LL GIVE BRAINIEST:)
Answers
Answer:
4.D. 2KJ
5.B. close to 0 degree celsius
Explanation:
heat absorbed= heat given out
100g * 4.2 * (x-0)= 400g * 4.2* ( 20-x) where x is the new temp reached
then x= 20
i.e. the temperature of ice increases to 5 degree celsius and the temperature of water decreases to 5 degree celsius .
hope it helps
How does the suns energy contribute to the movement of water in the water cycle?
Answers
Answer:
The sun is what makes the water cycle work. ... Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle.
Explanation:
Answer it doesn't contribute
Explanation: it doesn't contribute
what are most of the needed formulas to find the molar volume and the molar concentration (Cm) 11th grade chemistry
Answers
Answer:
Explanation:
molar volume=moles*given volume
for molar concentration we use two formulas molarity and molality
molarity=no of moles/volume
molality=no of moles/kilogram
science againnnnnn helppp!!!!!
Answers
Answer: this is not my own words :)
Learn how factors, such as exposure to the atmosphere, the composition of rock and climate affect the rate of weathering. Weathering is the mechanical or chemical process by which rocks are broken down. The weathering that happens to rocks can be understood by relating it to the digestion of a chocolate chip cookie
One of the factors that affects the rate of weathering is exposure to the atmosphere. ... Another factor that affects the rate of weathering is the composition of rock. Rocks are composed of minerals, which are solid substances found within rocks that have their own distinct chemical composition.
The spontaneous disintegration (breaking down) of a nucleus into slightly
lighter and more stable nucleus describes
A.nuclear fusion
B. nuclear fission
C. radioactive decay
D. nuclear radiation
Answers
Answer:
Radioactive Decay
Explanation:
Chemical and physical element properties are determined by their valence electrons. How do you describe metals with only one valence
electron?
A .highly reactive
B. poor conductors of electricity
C. reactive with other metals
D. likely to gain more electrons
Answers
Answer:
B
Explanation:
Chemical and physical element properties are determined by their valence electrons metals with only one valence electron are poor conductors of electricity. Option B is correct.
What are valance electrons?Valence electrons are the electrons present at the valance shell or orbit of the atom and always take part in the chemical reaction or reaction with other metals and can conduct electricity.
If the atom contains only one valance electron in the outermost shell or valance shell then it cannot conduct the electricity properly due to the fewer number of electrons.
Therefore, Option B is correct. Chemical and physical element properties are determined by their valence electrons metals with only one valence electron are poor conductors of electricity.
Learn more about valance electrons, here:
https://brainly.com/question/866518
#SPJ2
which statement is true of the particles that make up a substance?
a. Particles in a liquid and particles in a solid have the same amount of energy
b. Particles in a solid have more energy than particles in a gas
c. Particles in a gas have more energy than particles in a liquid
d. Particles in a liquid have more energy than particles in a gas.
Answers
Answer: particle in gas have more energy than the particles in a liquid
Explanation: this is because the amount of energy is directly proportional to how random the system is. gaseous molecules are in a more constant random motion than the liquid molecules
i need help with my assignment asap
Answers
2) liver cirrhosis
3) valve
A gas occupies 3.5L at 2.5 kPa pressure. What is the volume at 100 mmHg at the same temperature? Be sure to
show the setup and the final answer and unit.
Show Your Work
Answers
The volume at 100 mmHg : 0.656 L
Further explanationBoyle's Law
At a constant temperature, the gas volume is inversely proportional to the pressure applied
[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]
V₁=3.5 L
P₁=2.5 kPa=18,7515 mmHg
P₂=100 mmHg
[tex]\tt \dfrac{18.7515}{100}=\dfrac{V_2}{3.5}\\\\V_2=\dfrac{18.7515\times 3.5}{100}=0.656~L[/tex]
Help please !
A
B
C
D
Answers
Answer:
the answer is letter B. the entropy
What type of a solution is 60g NaNO3 at 40°C in
100g H202
Answers
Answer:
Explanation:
Saturated solution
Explanation:saturated solution
Select all that apply. Using your periodic table of the elements which chemical symbols indicate an element?
Question 5 options:
O
I
i
Ca
Answers
Answer:
O, I, Ca
Explanation:
HELP ASAP
Describe the function of Cytokinesis in the cell cycle.
Answers
how many significant figures are in 0.00970 g?
Answers
Answer:
3
Explanation:
begining 0's are never significant
all numbers 1-9 are always significant
ending 0's are only significant when there is
a decimal.
Urgent !!!!!!!!!! Due today plzzzzz help me
Answers
Answer:
Explanation:
a. H3O+
b. H3O+
c. CH3C(OH2)+
How do I find the formula for Phosphorus Tetroxide
Answers
You are going to want to flip the elements subscripts with one another.
P6O4
P will just stay as phosphorus, but since oxygen has 4 atoms, itbwill become tetroxide
If a compound begins with a metal, it most likely is a _______ compound
metallic
molecular
covalent
ionic
Answers
Answer:
A
Explanation:
If a compound begins with metal, it is most likely to be a metallic compound. Thus, option A is correct.
The metallic compound has been formed when the metal has been bonded with a metal or more than 1 metal by the ionic or covalent interaction.
The ionic interactions result in between the metal and non-metal or between two metals, and the covalent interactions have been found in the nonmetals.
The molecular compound has been the one that has been formed a molecule. All the compounds are molecular compounds.
Thus, if it starts with metal, it has been most likely to form a metallic compound. Thus, option A is correct.
For more information about the compounds with metal, refer to the link:
https://brainly.com/question/18665430