Answer:
Explanation:
Remember that the key is the water so
using the formula q=m*s*deltT
We have the mass 2000g
we have the specific heat of water which is 1.00 cal/ g C
and the final temperature 20 C
Remember that delt T is the change in temperature meaning (Tfinal - Tinitial) Assuming that the water is at room temperature (25 C) before starting the reaction then
q= (2000 g)(1.00 cal/g C)(20-25)
q= -10, 000 cal
if you want you can convert to joules by multiplying by 4.314 J
In more simpler terms - If all the heat released was absorbed by the water, and it takes 1 calorie of heat to raise
the temperature of 1 gram of water by 1°C that is a total of 20 times 2000 or 40,000 cal.
or 40 kilocalories. If you want it in joules, there are 4.184 joules to one calorie so it is
4.184 times 40 or 167.36 kilojoules.
Hope that helped
A snack that, when burned, heats 2,000 g of water by 20 °C, releases 4.0 × 10⁴ cal (1.7 × 10⁵ J).
A snack bar is burned in a calorimeter and heats 2,000 g (m) of water by 20 °C (ΔT).
We can calculate the heat absorbed by the water (Qw) using the following expression.
[tex]Qw = c \times m \times \Delta T = \frac{1cal}{g.\° C } \times 2,000 g \times 20 \° C = 4.0 \times 10^{4} cal[/tex]
where,
c: specific heat capacity of waterAccording to the law of conservation of energy, the sum of the heat absorbed by the water (Qw) and the heat released by the combustion (Qc) is zero.
[tex]Qw + Qc = 0\\\\Qc = -Qw = -4.0 \times 10^{4} cal[/tex]
Finally, we can convert -4.0 × 10⁴ cal to J using the conversion factor 1 cal = 4.18 J.
[tex]-4.0 \times 10^{4} cal \times \frac{4.18 J}{1cal} = 1.7 \times 10^{5} J[/tex]
A snack that, when burned, heats 2,000 g of water by 20 °C, releases 4.0 × 10⁴ cal (1.7 × 10⁵ J).
Learn more: https://brainly.com/question/10987564
A mining crew extracted two different types of minerals from underground.
Then, they transferred the same amount of energy into both minerals. Why did
mineral A change while mineral B stayed the same? Explain what happened to
the molecules of both minerals.
they could be different types of minerals, so one reacted to the energy differently than the other one. and pls answer my latest questions its due by 11:59 pm TONIGHT or i get kicked out of school.. pls help..
Answer:
Mineral A's molecules had a high level of attraction before. As well as the molecules in mineral B. But, mineral A's molecules, probably had higher kinetic energy. Which means a higher temperature and faster-moving molecules. Which allowed it to spread more and since it spread more, it became a liquid. Mineral B might have had not that much kinetic energy so the temperature was colder and its molecules moved slower. That's why probably mineral A changed to a liquid while mineral B remained a Solid.
Explanation:
Mineral A's molecules had a high level of attraction before. As well as the molecules in mineral B. But, mineral A's molecules, probably had higher kinetic energy. Which means a higher temperature and faster-moving molecules. Which allowed it to spread more and since it spread more, it became a liquid. Mineral B might have had not that much kinetic energy so the temperature was colder and its molecules moved slower. That's why probably mineral A changed to a liquid while mineral B remained a Solid.
(Answer + Explanation are both the same thing btw)
Based on this simulation, how does the greenhouse keep plants warm? Use "infrared photons" in your explanation.
(Will give brainlest.)
Question: Next, click the Glass Layers tab in the black bar at the bottom of the simulation. Use the arrow in the Options field on the right to add one or more glass panes. This simulation shows how different photons would react to a layer of glass surrounding Earth, much like an actual greenhouse. How do the sunlight photons and infrared photons react differently to the glass layer(s)?
Edmentum answer: The visible light photons pass through the glass unaffected. However, the infrared photons that Earth reflects often change direction or are absorbed back into Earth’s surface when they interact with the glass.
the greenhouse keep plants warm because allow the heat to be retained, the gases provide the heating of the Earth.
How does the greenhouse effect work for plants?The operation of greenhouses is very simple: the sun's rays pass through the roof and heat the ground, and when the heat rises, it is not dissipated, remaining in the environment because it is trapped by the roof.
The denomination of greenhouse or shelter is used when the objective is to heat the environment. This technique is important as some plants do better in warmer temperatures. Cold can cause poor seed germination and poor nutrient absorption.
See more about greenhouse at brainly.com/question/13706708
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1. Which statement is a correct interpretation of the data in the graph?
A. As water temperature increases, solubility decreases.
B. As water temperature increases, solubility increases.
C. As water temperature increases, solubility remains constant.
D. As water temperature increases, solubility decreases and then increases.
Answer:
B
Explanation:
Aiden has $100 in a savings account that earns 10% annually.The interest is not compounded. How much will he have in 1 year?
Answer:
Explanation:
Sorry dunno
describe one way in which rocks formed on Mount Moran.
Answer:
One way in which the rocks are formed on Mount Moran is due to the presence of intense heat and pressure. When the slabs of sedimentary rocks got buried deep beneath the Earth's surface, they have experienced intense heat and pressure. Later on, they formed into metamorphic rocks.
Explanation:
help plz?
explain what is sorted sediment. why does it occur?
Answer:
Particles become sorted on the basis of density, because of the energy of the transporting medium. High energy currents can carry larger fragments. As the energy decreases, heavier particles are deposited and lighter fragments continue to be transported. This results in sorting due to density.
Explanation:
For the following question, select the correct chemical formula for the elements if they were to bong together.
Iodine and Bromine
ionic
metallic
covalent
noble
Answer:
Ionic
Explanation:
Lithium is an alkali metal and form an ionic bond by donating an electron.
Fluorine is a halogen and forms ionic bonds by accepting an electron.
The electronegativity difference between lithium (0.98) and fluorine (3.98) is 3 Pauling units. Usually, when elements have a difference of 1.7 (or 2.0) Pauling units the bond is classified as ionic.
Hope this helps! If you have any more questions or need more explanation please leave a comment down below and I will reply ASAP. Good luck!
Which of the following elements have similar chemical properties to SULFUR?
A. Phosphorus and Arsenic
B. Oxygen and Selenium
C. Phosphorus and Chlorine
D. Nitrogen and Chlorine
Answer:
B:Oxygen and Selenium
Explanation:
They both have six valence electrons.
What do members of a particular species living in a specific area always form?
population
individual organisms
community
ecosystem
Answer:
Yeah, probably population.
Explanation:
Population as in the species' population.
plzzzzzzz HELP in TIMED
The atomic number of iron is 26 and the atomic mass of its most common isotope is 56. How many electrons are in an atom of iron?
26
82
56
30
Answer:
26
because it just is
1. The whole world is __________________ with rocks.
2. Rocks have / have never been melted or molten at some time.
3. Bubbles / Lines in some rock were formed by chemical reactions in the rock when cool.
4. Wind and ____________________ moving over the surface break rock down into sand.
5. Soil comes from ______________________ which comes from rocks.
6. Igneous rocks come from the word _____________________ meaning fire.
7. Sedimentary rock has layers because sand / boulders are washed downstream and settle on the bottom.
8. ____________________ rock is a combination of the other two and has changed into new rock.
9. Rock can change into sand and sand can then change into ________________ over many years.
10. ________________ in farmland has a lot of living things in the top layer or horizon.
11. A huge flood happened in Washington State when a(n) ___________________ broke.
12. Only water / several things can change the shape of the land.
13. Diamonds are the _________________ substance known to us.
14. Rocks are formed by wind, ________________ heat, and water and change from one type into another.
15. Sedimentary rocks are made from sand and _____________ compressed under heat and pressure.
Answer:
The whole world is covered with rocks.
Name 1 object that you would use the following types of measurements for; Mass, Volume and Density.
I need this by 8:30
Homeostasis means maintaining
Your answer:
varied internal conditions.
varied offspring.
similar offspring.
stable internal conditions.
plz help this for sience