Answer:
1. The object is moving forward.
Explanation:
help me pls
words from the video:
What do fireworks, a fried egg, and a rusting vehicle have in common? They all involve chemical reactions. If two or more elements or chemical compounds come into contact with one another and there is enough energy present, a chemical change may take place.
When a substance undergoes a chemical change, the chemical structure of that substance is altered. A chemical change can also be called a chemical reaction. During a chemical reaction a new substance is formed.
Observe the chemical reaction between bromine and aluminum. Pieces of aluminum are cut from a strip of foil and added to liquid bromine. At first there is no reaction because of the protective oxide coating on the aluminum. But soon an exothermic reaction between bromine and aluminum causes brown fumes of bromine to be given off. But as a new substance, aluminum bromide is produced. White smoke is produced.
The resulting residue is also aluminum bromide. When two compounds or molecules react together to form new substances, they are called reactants. They new substances created plus any resulting ash, water vapor, or carbon dioxide are called products, because they are produced by the reaction.
Some chemical reactions, such as the explosion of fireworks, can happen very fast—in less than a second.
Others, like the rusting of a car, might take years. It is important to carefully examine chemical reactions because there are many ways substances can be changed without a chemical reaction taking place.
Changes of state, for example, from a solid to a liquid or from a liquid to a gas, always involve a physical change rather than a chemical one. Melting sulfur is a good example. When solid sulfur is heated to 120 degrees Celsius it melts and first forms a pale yellow liquid.
In this form the atoms are covalently bonded and the liquid can flow easily. However, heated up beyond 150 degrees Celsius, the result is a dark red liquid that is over 2,000 times stickier. The sulfur may have changed physically but it's still sulfur.
No chemical reaction has taken place. Most of the time changes of state can be reversed by either adding or taking away heat. When water is boiled, for example, water vapor molecules are released in the process.
If you captured all the vapor molecules in a container they would reform again as water droplets once the vapor cooled. When a chemical change occurs it is more difficult to revert the substance back to its original state.
Answer:
this is answers to the second picture
Explanation:
1- energy
2- structure
3- reaction
4- substance
5- reactants
6- products
7- changed
8- At first there is no reaction because of the protective oxide coating on the aluminum. But soon an exothermic reaction between bromine and aluminum causes brown fumes of bromine to be given off. But as a new substance, aluminum bromide is produced. White smoke is produced.
9- heated to 120 degrees Celsius it melts and first forms a pale-yellow liquid.
In this form the atoms are covalently bonded, and the liquid can flow easily. However, heated up beyond 150 degrees Celsius, the result is a dark red
10- When a chemical change occurs it is more difficult to revert the substance back to its original state. (To be honest I don't know)
Helena uses the same force to move an object that has a mass of 12 kg and an object that has a mass of 5 kg. She predicts the 12 kg object will have a greater change in motion. Is she correct?
No, the object with the smaller mass will have a greater change in motion.
No, both of the objects will have an equal change in motion.
Yes, the object with the larger mass will have a greater change in motion.
No, neither object will have a change in motion.
Answer:
No, the object with the smaller mass will have a greater change in motion.
Explanation:
Hope this helps!
Hydrogen and oxygen undergo a chemical reaction to form water. How much water will be created if hydrogen has a mass of 3.56 g and the oxygen has a mass of 25.32 g?
Answer:
22.88g
Explanation:
Hope this helped <3
PLEASE HELP
Sheila and Jerome are lab partners. They have the following materials at their table:
1 square of aluminum foil, 1 stirring rod, 1 beaker of water, 1 scoop of copper II chloride salt (blue color)
Step 1:Jerome adds all the salt to the water and stirs. The salt crystals disappears and the liquid solution turns a clear blue.
Step 2: Sheila tears up the aluminum foil into small pieces.
Step 3: Jerome dares her to put the foil in his beaker. They see the edges of the foil turn a rusty orange. As they stir, the beaker becomes warm to the touch and a vapor begins to rise from the surface of the beaker. Within a few minutes, the foil has disappeared and the liquid is now clear. There are orange-rust colored flakes floating in the liquid.
Q: Jerome claims that when the salt was added to the water it turned blue and the foil disappeared, these were chemical changes. He went on to explain that the chemical change was due to the fact that the atoms were speeding up. Sheila disagrees claiming that 1 is a physical change and 1 is a chemical change and Jerome’s evidence is incorrect. Who is correct, Jerome or Sheila? Write a scientific explanation (CER) to support your argument.
Answer:
jerome
Explanation:
Based off of the simulation pulley gizmo; how many people did it take to lift the armchair with a fixed pulley? (Look at Activity A question 2)
Question 5 options:
1
3
4
5
Answer:
IN WHICH GRADE YOU ARE????
I need help with this please
Answer: C, the number of atoms stay the same
Explanation:
The number of atoms remains the same before and after the reaction. This is because of the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction. In the case of methane burning, one molecule of methane (CH4) reacts with two molecules of oxygen (O2) to produce one molecule of carbon dioxide (CO2) and two molecules of water (H2O). The total number of atoms on both sides of the equation is conserved.
Martin slowly pours an unknown liquid into a container that originally had some water in it. He is measuring the temperature in the container as he does this.
The temperature in the container rises very fast.
What kind of change is likely to be happening in the container?
A. A physical change.
B. A chemical change.
C. Neither a chemical nor a physical change, only a temperature change.
D. No evidence of any type of change.
glacial striations in the bedrock of south africa indicate that glaciers once moved across the african continent the presence of glaciers on the surface of africa is evidence that
The presence of glaciers on the surface of Africa is evidence that it moved outwards from a central point in southern Africa.
What is a Glacier?This is defined as the persistent body of dense ice that is constantly moving under its own weight.
Glaciers being found on African surface depicts that the movement occurred outward from Southern Africa during the period.
Read more about Glaciers here https://brainly.com/question/6666513
Iodine-138 decays by beta decay. What element does it produce?
[tex] {xe}^{138} [/tex]
Explanation:
the bottom number would be 54. This is because you add one to 53 to make it 54 and you add 0 to 138.
What causes the seasonal changes viewed in the night sky?
Answer:
If you look at the night sky different
times of the year you see different
constellation.This change due to the
motion of the earth in it's orbit around
the sun.The shift of the sky is really
the motion of the earth around the sun.
Explanation:
Hope it helps
Explanation:
the factors which bring about the chemical reaction
help pls due todayyyy
Answer: Below
Explanation:
Steal wool + oxygen (fire): The steel wool is a grayish color and has a rough surface. Oxygen is transparent It looks like a powder, and like if it was rusted steel wool but then broken apart and turned into a powder Well Iron oxide is 7 grams and steel wool combined is 7 grams so you can say that the mass was conserved Yes, this is a chemical change because the steel wool rusted and rust is a chemical change, so iron oxide is cause because if a physical change.
Egg + Heat : The egg has a yellow yolk in the middle while there is some type of liquid at the border of the yolk, but it is clear, the heat is hot but transparent The egg turned into a delicious food called an omelet what was yolk staid as a liquid but got a tad harder, but the transparent border around it turned white It was conserved because the eggshell was 4 grams and the fried egg is 41 grams It is a chemical change because it results in the formation of new particles, and the chemical bonds break up and new ones are formed.
Water + Heat The water is a clear liquid, while the heat is very hot but transparent The water turned into a type of oxygen -Water Vapor- If 5 g of water becomes a gas it becomes 5 g of water vapor. The mass of the liquid water is simply transferred into the mass of the newly formed water vapor. There was no chemical reaction because the water vapor can be turned back to water also it just changed from a liquid to a gas and did not change its composition
Zinc + Hydrogen Chloride Zinc: a white/silver metallic solid. Hydrogen chloride (dilute hydroelectric acid) a transparent, colorless liquid with a very low pH (acidic). Zinc "dissolved" in hydrogen chloride, while emitting a colorless gas. The liquid remains a colorless liquid, possibly still having a low pH from the unused acid. The colorless gas collected in a test tube gives a popping sound when ignited with a burning wooden splint, so it is not air embedded in the zinc, nor dissolved in hydroelectric acid. Well although the zinc chloride is 12 grams and not 15 the gas that was released was 3 grams and as we all know 3 + 12 is 15 so you could say that the mass was conserved The production of a new substance (most probably hydrogen) from the reaction of the two reactants. When a few drops of the liquid product are evaporated on a watch glass, a white residue is left.
When a few drops of the liquid hydroelectric acid are evaporated on a watch glass, there is no residue. This proves that a new product (hydrogen gas), (white powder, zinc chloride) is produced instead of zinc being physically dissolved in hydroelectric acid.
Sodium Hydroxide + Copper Sulfate Sodium hydroxide is a turbid solution and copper sulfate is in form of bright blue crystals. When their solutions are mixed with each other, a pale blue precipitate of basic copper hydroxide & a solution of neutral salt sodium sulfate will be formed. The sodium hydroxide and the copper sulfate combined make a total of 67 grams and the product is split because the sodium sulfate is 47 grams and the copper hydroxide is 20 grams but all together it is still 67 grams so you could say that the mass was conserved The proof of the reaction is the appearance of pale blue precipitates of basic copper hydroxide & a solution of neutral salt sodium sulfate.
Is gravity alone sufficient to explain the behavior of the tinsel in the Levitating-orb system? Explain why.
Answer:
The object is moving forward
Explanation:
Hop this helps :)
How do proteins respond to help heal a wound?
How does protein help with wound healing? Your body needs protein to help build and repair muscle, skin, and other body tissues. Protein also helps fight infection, balance body fluids, and carry oxygen through your body. When you have a wound that's healing, think of food as medicine.
to help build and repair muscle, skin, and other body tissues.
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How does the development of the heliocentric model show how scientific ideas change over time?
Answer: Italian scientist Giordano Bruno was burned at the stake for teaching, among other heretical ideas, Copernicus' heliocentric view of the Universe. In 1543, Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun.
Explanation:
Italian scientist Giordano Bruno was burned at the stake for teaching, among other heretical ideas.
What is Heliocentric model?Copernicus' heliocentric view of the Universe. In 1543, Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun.
Because of heliocentrism, we now understand that Earth and the other planets of the solar system all orbit the sun.
But there once was a theory that put Earth at the centre of what was thought to be the entire cosmos and that everything literally revolved around us. The sun is at the centre of the heliocentric model, which is now known as the geocentric model.
Therefore, Italian scientist Giordano Bruno was burned at the stake for teaching, among other heretical ideas.
To learn more about Holiocentrism, refer to the link:
https://brainly.com/question/24599452
#SPJ2
A food scientist is determined to create a mango that looks exactly like a mango but tastes like salmon. Can this be achieved through artificial selection? Why or why not?
Please help!!! Hydrogen and oxygen undergo a chemical reaction to form water. How much water will be created if hydrogen has a mass of 3.56 g and the oxygen has a mass of 25.32 g?
Actual answers only please :)
Answer:
22.88g
Explanation Hope this helped <3
with the development of technology why is muscle atrophy occurring more often what can you do to stop it THIS IS A SCIENCE QUESTION
Answer: Technology is causing people to sit around more while using it. Therefore people are not exercising as much. This causes the strength of muscles to go away. A way to help stop this is to get exercise for at least one hour a day.
Explanation:
HELPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!! 30 POINTS!!!!!!!!!!!!!!
Answer:
What is this please send questions properlythen i will answer it properly
PLS HELP DUE SOON(Ignore that wet thingy on my paper it’s my matcha latte it go on it lol)
Answer:
well for
1. Because cytoplasm is made of a jelly like consistent
and
2. wastes product are transported by endoplasmic reticulum ,from organelles to outside cell ,so if cell size is big ,it will take more time in transportation and vice versa
Answer: Hello
Explanation: Hello
Name the 5 characteristics needed for a substance to be a mineral
naturally occuring, solid, inorganic, crystalline, structure, ans the same chemical composition throughout.
Answer:
A mineral has to be naturally occurring, inorganic, solid, crystal structure and definite chemical composition.
Explanation:
How do wetlands form?
- tributaries flow into rivers.
• Runoff travels down the side of a divide.
ɷ Water builds up in a depression left by an ice sheet.
• Groundwater comes to the surface and floods the land.
take your time :) !
Answer:
I think it's "Water builds up in a depression left by an ice sheet."
Explanation:
I think.
Which phrase describes a feature of groundwater?
-feeds rivers
--provides habitats
-makes up 75% of fresh water
--used for hydroelectric power
Answer:
number 1
Explanation:
Groundwater mainly contributes the water into the surface water like streams, rivers, and lakes.
Groundwater feeds rivers describes it feature.
What is ground water?Groundwater refer to the water that is below Earth's surface and they infiltrate the fractures of rock formations and spaces between sediments.
Ground water replenish the rivers, streams and lakes.
Therefore, Groundwater feeds rivers describes it feature.
Learn more on groundwater from the link below.
https://brainly.com/question/9617
This is the chemical formula of Nitrogen gas.
N₂
Which of the following is NOT true of nitrogen gas?
A. It is made of two atoms.
B. It is a molecule.
C. It is an element.
D. It is a compound.
Answer:
D
Explanation:
N₂ is not a compound because it is not made up of two or more different elements - it is only made up of nitrogen atoms
Hope this helps!
speed =________
ate divided by time
rate divided by distance
distance divided by time
time divided by rate
I need answer asap! Plz someone help ! Ill give brainliest!
Answer:
Distance divided by time is the answer. :)
Explanation:
What will a soccer player need to do to change a ball’s position?
1. He must apply gravity to the ball so that the ball will move.
2. He must weigh the ball to determine the motion that needs to occur.
3. He must set the ball in motion by applying a force in the desired direction.
4. He must identify the location of the ball.
First one to answer will get brainliest!
Answer:
He must set the ball in motion by applying force in the desired direction.
Explanation:
That is how the soccer player will change the ball's position.
Have a good day :)
Answer:
4. He must identify the location of the ball.
Explanation:
If a soccer player needs to change his position, then he will need to identify the location of the ball.
hope this helped.
can someone solve this question please
Answer:
I can't see the question
Explanation:
Plz, Help! Read the instructions and answer the question! First one to answer will get brainliest!
Answer:
H₂S: Hydrogen Sulfide: 3 atoms
HCl: Hydrochloric acid: 2 atoms
NaCl: Sodium Chloride: 2 atoms
CaCO₂ : Calcium Carbonate: 3 atoms
Explanation:
I'm not sure about the answer but this is the best I could do hope it helps
since I'm a 9th grader I know something about this.
Answer:
wish i could help but i dont remember learning this
Explanation:
Place the events in the order that they must occur for a fossil to be formed in sedimentary rock.
A food scientist is determined to create a mango that looks exactly like a mango but tastes like salmon. Can this be achieved through artificial selection? Why or why not?
Answer:
depends on the artificial 'materials' used and the food scientist
Explanation:
If the food scientist is skilled enough and works hard enough this it might be possible but this does seem like a difficult task i personally doubt that this could be done until next few years. :)
PLS HELP (science)
Match the following molecules with the number of atoms they contain.
1. 2Fe
seven
2. 2Al 3O 2
eight
3. 4O 2
two
4. 5C
five
5. H 2SO 4
ten
Answer:
hello I will answer ur question if u answer mine
Explanation: