During which phase change will two grams of water
release 668 joules of heat energy?
A. melting
B.
freezing
C.
vaporization
D. condensation
During the phase change of 2 grams water to solid-state, there has been the release of energy, and the process will be freezing. Thus option B is correct.
The release of the amount of heat by the sample has been able to change the state of the matter from the loosely bounded to the combat state.
The melting has been the process of conversion of solid-state to a liquid state. In the process, there has been the absorption of the energy for the rupture of the bond.The freezing has been the conversion of liquid state to solid-state. The process requires a little amount of energy for the conversion.The vaporization requires the absorption of energy and converts the liquid state to the vapor state.The condensation has been the process of conversion of the vapor to the gaseous state. The process releases energy in large amounts.Thus, during the phase change of 2 grams water to solid-state, there has been the release of energy, and the process will be freezing. Thus option B is correct.
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In every chemical reaction that produce energy,
react with
A. 1 glucose, 6 oxygen
B. 6 glucose, 6 oxygen
C. 1 glucose, 3 oxygen
D. 3 oxygen ,3 glucose
Answer:
D
Explanation:
Hope you get it right
which molecules from food and air end up in the cells in the body? choose all the apply- NEED URGENT 10 points!
How is a Mixture different from a Compound
30 points
Answer:
A substance that is comprised of more than one kind of atom reinforced together. Blend: A mix of at least two components or mixes that have not responded to bond together; each part in the combination holds its own properties.
Explanation:
Compound: A substance that is made up of more than one type of atom bonded together.
Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties
At 1:00 P.M., the air temperature was 78°F, and air pressure was 30.0 inches of mercury with partly cloudy skies. By 4:00 P.M., the temperature dropped to 62°F, and the pressure dropped to 29.5 inches of mercury. Which best predicts the weather for later that afternoon? pls help im about to get killed by my teacher giving out brainiest to fastest answer THAT GOES WITH DA QUESTIONNN
1. Which force below is an attractive force that pulls objects together?
inertia
friction
air resistance
gravity
Please help .
Which of the following is a compound?
A Water
B Oxygen
C Chlorine
D Aluminum
Explanation:
A compound is made out of 2 or more elements.
Oxygen (O2), Chlorine (Cl2) and Aluminium (Al) are all elements.
Water (H2O) is made out of hydrogen and oxygen, therefore water is a compound. (A)
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option A that is water.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond. Water is a compound among all the given options. Water exits in three states solid (ice), liquid (water) and vapour.
Therefore, the correct option is option A.
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While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile’s acceleration?
Answer:
-0.75 [tex]m/s^{2}[/tex]
Explanation:
a = [tex]\frac{v2-v1}{t}[/tex] = [tex]\frac{15 m/s - 24m/s}{12s}[/tex] = -0.75 [tex]m/s^{2}[/tex]
Hope this helps!!
Please help me with this!
Answer:
10. F
11. A
12. B
13. C
14. G
15. A
16. F
17. B
18. D
19. E
20. B
Explanation:
im sorry
ik some are probably incorrect
Jaden has a mass of 45 kilograms on Earth. Jupiter has more gravity than the Earth. On Jupiter, Jaden's mass will be _____.
45 kilograms
more than 45 kilograms
less than 45 kilograms
Answer: 45
Explanation: The mass of the object remains same everywhere.It does not change in any of the location. Hence, Jaden's mass will be 45 kg on Jupiter.
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help me on science
An aluminum atom can lose 3 electrons in order to have a full outer energy level. What charge does the resulting aluminum ion have?
Answer:+3
Explanation: remember negative goes with positive and vise versa
The solar system is part of the Milky Way Galaxy. How is that galaxy
part of a larger system?
Answer:
Our Sun which is a huge star and all the planets around it are part of the Milky Way Galaxy. These stars form a large disk whose diameter is about 100,000 light years. Our Solar System is about 25,000 light years away from the center of our galaxy. We live in the suburbs of our galaxy.
Explanation:
There are various types of studies. Because the Milky Way is a large barred spiral galaxy, it is known to be part of a larger system.
What is a galaxy?A galaxy is a massive mass of gas, dust, and billions of stars and solar systems held together by gravity.
There are various types of research. The Milky Way is known to be part of a larger system because it is a large barred spiral galaxy. The Milky Way Galaxy contains all of the stars that can be seen in the night sky.
Our Solar System is known to be made up of our star, the Sun, and its orbiting planets, which include the Earth as well as numerous moons, asteroids, and so on.
Our Sun is thought to be one of hundreds of billions of stars in our Milky Way Galaxy. The universe is said to consist of all galaxies, which have been discovered to number in the billions.
Thus, this way, in which the galaxy part of a larger system.
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I need help this is due tomorrow
Answer:
it's spring tide.
Explanation:
The smallest tidal ranges are less than 1 m (3 feet). The highest tides, called spring tides, are formed when the earth, sun and moon are lined up in a row. This happens every two weeks during a new moon or full moon. Smaller tides, called neap tides, are formed when the earth, sun and moon form a right angle.
Hope it will help :)❤
When a species population no longer has traits adapted to its environment, the species will
A: be driven to extinction.
B: mutate to produce more favorable traits.
C: breed with stronger species.
D: make the environment more suitable.
I think that A or C is the answer.
Question 4 options:
_____________ use an element's symbol and show valence electrons
Answer:
Lewis dot symbol is the answer.
ehehe can someone help me answer plz Students collected weather data every two hours between 9 A.M. and 3 P.M., as shown in the table.
*picture*
Based on this data, what type of weather should the students predict for later in the afternoon?
windy with precipitation
calm with clearing skies
hot and dry
freezing rain and snow
If two objects have different temperatures, heat will flow from the warmer object to the cooler one until _________________________.
A. one reaches a temperature of zero
B. one runs out of energy
C. they reach the same or equal temperature
D. one is absorbed into the other
A chemist mixed two substances together: a colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right.
Is the ending substance the same substance as the colorless liquid? What happened to the atoms of the starting substances when the ending substances formed? Be sure to explain your answers to both of these questions.
Answer:
The ending substance is the same as the colorless liquid.
Explanation:
Notice the populations decrease as you go from the bottom of the food chain to the top. Why do you think this is so?
One property of metalloids not shared with metals or nonmetals is that metalloids are _________.
One property of metalloids not shared with metals or nonmetals is that
metalloids are they are shiny like metals and brittle like non-metals.
Metalloids are elements which have some intermediate similarities to
metals and non metals. They are neither good or bad conductors of heat
and electricity and they exist as solids at room temperature.
Examples of metalloids include boron. silicon, germanium etc and they are
brittle and shiny elements which gives them a distinctive physical
appearance.
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The measurement of electrical power is called _____.
a. horsepower
b. light
c. watts
d. shock
Answer:
c. watts
Explanation:
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Answer:
watts
Explanation:
hope this helps !
~jolisaevita
Jill and Susan were absent when the instructions were given for the lab investigation. They gathered their materials and watched their classmates see what to do, not taking the time to read the instructions. Explain how Jill and Susan violated safety procedures.
Answer:
They violated safety procedures by not reading the instructions, which could have put everyone in danger because they're dealing with chemicals and if you mix the wrong chemicals together it could explode or release some type of gas that is not good to breathe in.
Explanation:
They violated safety procedures by not reading the instructions, which could have put everyone in danger because without knowing they are using chemicals and it may lead to explosion.
What are the safety measures that should be taken in laboratory?There are several safety measures that should be taken while performing an experiment in lab such as avoid drink and food while working in laboratory and wear PPE kit to keep yourself safe.
Never work lonely in the lab because this condition will turn into danger situation as suppose a person works lonely and due to reaction of some chemical the person become unconsious than there is no one to help him.
Always wear gloves, PPE kit, proper shoes, lab coat of full sleeves with safety goggles. All these things will helps to keep a person safe in lab while experiment.
Therefore,they violated safety procedures by not reading the instructions, which could have put everyone in danger because without knowing they are using chemicals and it may lead to explosion.
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what is the texture of oxygen
science help please 20 points
Answer:
1. Earth
2. Sun
3. Sun
4. Earth
5. Earth
6.Sun
7. Earth
Explanation:
I'm a lil sus of 3 and 6 but I'm pretty sure it's right.
Make a list of 7 observations about what happens in the night vs. day.
Answer:
At night animals like owls and bats will go out and hunt.
When its nighttime It will get cooler out because the sun is on the other side of the earth.
During the day most animals are awake.
Answer:
Night:
1. All the stars (except the Sun) are in the sky
2. The sky is usually black
3. It's usually colder at this time
Day:
4. The sky is usually blue in the morning
5. The clouds are only visible in the day
Both:
6. It can rain at either time
7. The sun and moon are both usually glowing
Explanation:
Help please giving brainliest
Answer:
i think protons and neutrons
Explanation:
im not sure tho
Answer:
Atomic mass is calculated by adding the masses of protons and neutrons in a given atom of an element.
Explanation:
For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom.
Atomic mass is (just slightly less than) the sum of the masses of protons and neutrons in a given atom of an element.
hope this helps and is correct! :)
What part do the stamen and the ovule play in plant reproduction?
Question 7 options:
The stamen is the female reproductive part of the plant and it produces pollen.
The stamen holds the ovule and stigma together and produces pollen for fertilization.
When the stamen receives pollen from the plant, it is able to produce seeds and fruit.
When the stamen produces pollen, the ovule receives pollen to produce seeds and fruit.
Answer:
D. When the stamen produces pollen, the ovule receives pollen to produce seeds and fruit.
Explanation:
The stamen is the male reproductive organ of a plant and the ovule is a female reproductive part of a plant. (So we can rule out the first answer choice because stamen is in male plants not female plants).
The stamen produces pollen which sticks to pollinators such as bees when they land on the male plant. (So we can rule out the third one because pollen is produced by stamen and not received).
When the pollinators travel to female plants, the pollen gets deposited into the ovule which then produces seeds and fruit. (So we can rule out the second one because pollen is transported from one plant to the other by pollinators, not by the plants themselves).
Hope this is correct and helps!
I would appreciate it if you could give brainliest :)
The flowering plants reproduce sexually through a process known as the pollination. When the stamen produces pollen, the ovule receives pollen to produce seeds and fruit. The correct option is D.
What is pollination?The process of transfer of pollen grains from the male anther of a flower to the female stigma is defined as the pollination. It can occur either within a flower or between the flowers of the same plant or flowers of different plants.
The male sex organ of a flower is stamen and the female part is pistil. The anther of the stamen contains pollen which consist of the male gametes. The movement of pollen to the stigma causes reproduction.
The innermost part of a flower is called the carpel. It contains ovary where eggs or ovules are located. The pollen from anther enter the ovary and fertilize an ovule in order to develop a seed.
Thus the correct option is D.
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Which statement describes the moment magnitude scale?
It measures only small earthquakes.
It collects data using a seismograph.
It shows only the strength of seismic waves that were produced.
It determines the amount of damage caused by an earthquake.
Answer:
It shows only the strength of seismic waves that were produced.
Explanation:
Answer:
B). It collects data using a seismograph.
Explanation:
I thought it was it was choice 3 as well but i took the quiz and it turns out to be B
Carbon monoxide (CO) _____.
is an element
is made of two oxygen atoms and two carbon atoms
increases in volume when compressed
is a compound made of oxygen and carbon
Answer:
the last one
Explanation:
All of the other ones are false
Answer:
is a compound made of oxygen and carbon
Explanation: