Answers
1. Heat needed = 293.25 J
2. Time to leave : 2 s
Further explanationGiven
1.5 g H2
Cp H2 = 14.27 g/J C
Δt= 13.7
Required
1. Heat needed
2. Fridge time
Solution
1. Heat can be formulated :
Q = m.c.Δt
Q = 1.5 x 14.27 x 13.7
Q = 293.25 J
2. Heat decreases = 150 J/s, so for 293.25 J :
[tex]\tt t=\dfrac{293.25~J}{150~J/s}=1.955~s\approx 2~s[/tex]
Related Questions
What is the mass of 6.25 moles of Ca(OH)2?
Answers
so you need to work out the rfm of Ca(OH)2= 40(16+1)2= 40+34= 74
and then use the formula= moles x mr
6.25 x 74= 462.5
Answer= 462.5g
Easy points. Chemistry question. Put the following molecules in order, from those that require the least energy to break
the carbon-carbon bond to those that require the most energy. Use the letters A, B, and C. Pls explain why
Answers
Explanation:
Molecule C is made up of a triple bond, which requires the most energy to break. Molecule B is made up of a double bond which is not as strong as a triple bond therefore requiring less energy. Molecule A is made up of a single bond which is the least strong thus requiring the least amount of energy.
A student observes poor growth of plants in a garden containing high clay content. Clay content reduces drainage in soil. Which of these is the best method to improve plant growth in the garden?
A. water the plants once a month
B. add sand to the soil
C. mix soil with chemicals which absorb the air
D. do not dig or till the soil
Answers
Answer: Add sand to the soil
Explanation:
Just finished my test
Answer:
add more sand to the soil
Explanation:
In a compound, what is this number called: H2O. Pretend it’s at the bottom of the element symbol but just the name of the number.
Thanks!
Answers
Answer:
It's the valence number of oxygen
Answer:
Mixture , element and Mass
How can you convince someone that the earth moves slowly?
Answers
Answer:
By a resource or an EXTREMELY good explanation with good reasons and details.
Explanation:
When examining features on the ocean floor, like a volcano, how would it appear?
severely eroded
only somewhat eroded
not eroded at all
barely eroded compared to land volcanoes
Answers
Answer:
barely eroded compared to land volcanoes
Explanation:
the other person is wrong
Liquid in a graduated cylinder has a volume of 70 mL. You put a small solid ball into the cylinder, and the height of the liquid moves up to 80 mL. What is the volume of the ball?
Answers
Have a nice day
(11....
1. Use the chart below to determine which element has the larger Zeff
value. Circle an answer for a-e:
a) Li or K b) C or O c) C or P d) C or Se e) Li or Br
Answers
Answer:
c
Explanation:
because chlorine and phosphorus
1. Which of the following components does not make up rock salt? *
Answers
Answer:
In my opinion the third one is write.
Explanation:
soil.
how would you describe life and why?
Answers
Answer:
Life to me is like a long road that has no stopping point.
I tried, Hope this helps :)
Headaches forced onto me. I was forced out of the womb by two women. My mother and my mother's doctor. I was held in adults arms and I hated it. I had to do whatever they said. I had these diapers around my bo.oty and they were so uncomfortable. I got older and I don't know why I listened to country. The only country song I like now is God Made Girls by Rae Lynn. I got older and started asking what inappropriate words meant. My parents told me the exact meanings and didn't censor. I was disgusted and stayed silent for hours. Now I'm my current age and I need to do about 5 math assignments each day all due at 11:59 pm or else they're missing and I have no excuses. I don't get them at all either there's not explanations. In conclusion, life is headaches forced onto me.
Step 8 measuring the volume of air near 80C ANSWERS
Temp of Gas : 82C
Height of Column of gas : 7.4
Temp of Gas : 355 K
Volume of gas : .93 cm3
Answers
Answer:
The answer is in the picture below.
Explanation:
Answer:
basically the question asked is the answer
its correct :)
Explanation:
EDGE 2023
What is the difference between the Lewis model and the valence-shell electron pair repulsion (VSEPR) model?
A.
Only the Lewis model shows the covalent bonds in a molecule.
B.
Only the VSEPR model can be used to explain intermolecular forces.
C.
Only the Lewis model takes into account unbonded electrons.
D.
Only the VSEPR model shows the geometric shape of a molecule.
Answers
Answer: only the VSEPR mode shows the geometric shape of a formula.
The number of particles in one mole of a chemical substances is 602,200,000,000,000,000,000,000 particles. What is the correct way to write this number in scientific notation?
6022 x 10¹⁹
0.6022 x 10²⁴
60.22 x x10²²
6.022 x 10²³
Answers
The correct way to write this number in scientific notation : 6.022 x 10²³
Further explanationScientific Notation is a standard form of writing numbers used in mathematical operations
The rules:
1. Writing order : first digit, decimal point, next digit
2. Then followed by powers of 10 (the value can be +/-)
If the value is> 10 (the power of 10 is +), the decimal point is moved to the left, to the right of the first digit
If the value is <10 ((the power of 10 is -), the decimal point is moved to the right, to the right of the first digit
I certainly didn't count the details of the number of zeros listed, but only saw the answer choices.
And the right ones are: 6.022 x 10²³
Answer:
The answer is D! 100%!
Explanation:
999 Juice Wrld Told Me So, and the internet never lies.
Complete the sentence: Cellular respiration occurs ________________.
only in plant cells
only in animal cells
only in chlorophyll
in plant and animal cells
Answers
Answer:
in plant and animal cells
Answer:
In plant and animal cells
Explanation:
What is the molar mass of the EF?
Answers
Answer:
47.778
Explanation:
Answer:
97.11 should be correct
explanation
EF = C4H5ON2
molar mass= 4 (12.01) + 5 (1.9) +16 + 2 (14.01) = 97.11 glmol
some help I’ll give brainliest
Answers
Answer: Meteoroid
Explanation:
Dwarf planets are smaller than moons
Comets are smaller than dwarf planets.
Meteoroids, Meteors, and Meteorites are broken off pieces of comets.
Meteoroids are smaller than Asteroids
2.
If 2 moles of solid carbon dioxide
evaporates, how many liters of CO2
will be formed at a temperature
of 300 K and 2.00 atmospheres of
pressure?
F 98.5 liters
G 2170 liters
H 24.6 liters
J 1080 liters
Answers
Answer:2170
Explanation:
In what order are redox reactions balanced?
Answers
Answer:
B
Explanation:
Answer:
b
Explanation:
a p e x :)
What are these answers Please Help
Answers
Answer:
Electronic flow
Explanation:
Electronic Flow from one to another
Where are earthquakes and volcanos most likely to occur?
within oceanic plates
continental boundaries
plate boundaries
hot spots
Answers
Answer:
continental plate boundaries
Explanation:
With what noble gas is the cation in KNO2 isoelectronic?
Answers
Answer:
argon
For example, the K+ ion is isoelectronic with argon. Potassium has 19 electrons and 1 is in the outermost shell: a valence electron. If potassium is ionized and becomes a +1 cation, this is to say that it lost its single valence electron. This is favorable, because it gives potassium a noble gas configuration
Infectious agents vary in their size and shape. Which infectious agent tends to be the smallest?
Answers
Answer:
prions
Explanation:
They are the smallest infectious agent.
Sometimes a fossil is formed as a result of the movement of an organism in soft sediment. What type of fossil is this called? bone fossil trace fossil frozen fossil petrified fossil
Answers
Answer:
The most common method of fossilization is called permineralization, or petrification.
Answer:
Trace Fossil
Explanation:
typically formed when an organism moves over the surface of soft sediment and leaves an impression of its movement behind.
(HELP ME ASAP!)
Testing for Carbon Dioxide
Limewater is calcium hydroxide
solution, Ca(OH)2. It forms calcium
carbonate,CaCO3, and water when
it reacts with carbon dioxide.
limewater
a Write a word equation for this
b Why does limewater go milky
when carbon dioxide is bubbled
through it?
Answers
B) when Ca(OH)2 is reacted with CO2, the CaCO3 produced is a precipitate which turns the solution milky
What does electronegativity have to do with polarity?
Answers
Answer:
Electronegativity is the measure of the ability of an atom to attract electrons to itself. So, higher electronegativity helps atoms take more control over shared electrons creating partial negative regions and partial positive regions which result in dipoles that cause polarity.
Explanation:
(pls mark me brainliest)
Answer:Electronegativity is the measure of the ability of an atom to attract electrons to itself. ... So, higher electronegativity helps atoms take more control over shared electrons creating partial negative regions and partial positive regions which result in dipoles that cause polarity.
Explanation:hope this helps and if im wrong im sorry :)
The half-life of plutonium-238 is 87.7 years.
What percentage of the atoms in a sample of plutonium-238 will remain radioactive after 263.1 years?
%
What percentage of the atoms in the same sample of plutonium-238 will have changed to another isotope after 263.1 years?
%
Answers
Answer:
263.1 is exactly three half-life, so the remaining portion is (1/2 x 1/2 x 1/2) of the original sample. That's 1/8 which is 12.5%
Answer:
12.5 87.5
Explanation:
Bonus question which of these is the smallest??
Answers
Answer:
Explanation:
Atoms
How are you able to see cells?
Answers
Explanation:
you are to see cells By doing an experiment.
Car and Motorcycle engines are controlled by what chemical reaction?
Answers
Car and Motorcycle engines are controlled by a chemical reaction which is controlled by gasoline and oxygen.
What is a Chemical reaction?A chemical reaction may be defined as a process that significantly involves the chemical transformation of one set of chemical substances to another. This process involves the utilization of substances known as reactants that are transformed into other substances known as products.
The fuel in cars and motorcycles delivers the source of energy to them in order to move from one place to another. This fuel significantly contains gasoline which reacts with atmospheric oxygen and results in a small explosion which derives some sort of energy that is finally consumed by the vehicle's engine.
Apart from this, the combustion of fuel is also facilitated in the presence of oxygen which liberates extremely high amounts of carbon dioxide in the atmosphere. This reaction has also occurred in the engines of vehicles.
Therefore, car and Motorcycle engines are controlled by a chemical reaction which is controlled by gasoline and oxygen.
To learn more about Chemical reactions, refer to the link:
https://brainly.com/question/11231920
#SPJ2
Which chemical(s) are reactants in the following chemical
equation?
C + O2 CO2
SELECT ALL THAT APPLY
а) C
b) 02
c) CO2
d ) There are no reactants in this chemical equation.
Answers
Answer:
A and B
Explanation:
The reactants in this chemical equation are C and O₂.
Given the chemical reaction is:
C + O₂ → CO₂
In a chemical reaction, reactants combines to give the product. The reactants are located to the left side of the expression.
The products are found on the right side .
A + B → C
reactants products
So, in the given reaction,
C and O₂ are the reactants and CO₂ is the product.
Answer: B and C
Explanation:
ur welcome