Question 7 of 32
1 Point
What is the purpose of environmental regulations on chemicals?
A. To prevent all chemicals from entering the environment
B. To make the production of chemicals more costly
O C. To only allow the use of chemicals that help the environment
O D. To protect the environment from harmful chemicals
Answers
Answer:O D to protect the environment from harmful chemicals
Explanation:
Related Questions
Please help its also urgent ( I have 7 more questions)
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Answer:
The answer is D) High Temperature and Little Rainfall
Explanation:
Answer:
ITS D
Explanation:
ITS d i hope this helps you
Yo answer my question
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Answer:
C maybe
Explanation:
Answer:
Its D
Explanation:
im a pro
Question This is a Science Test 15 POINTS OR MORE POINTS!
The following picture contains four beakers with four different colored solutions, light blue to dark blue. Which solution is the most concentrated?
A. the second solution from the left
B. the first solution (left-most)
C. the fourth solution from the left (right-most)
D. the third solution from the left
Answers
Answer:
darker means more concentrated!!
the answer is d
Explanation:
EX:the more color you put in frosting the darker it gets
help
Nicole has 2 glasses on the counter: one of water and one of sugar-water. She is baking a cake and needs to use the sugar-water for the glaze. Both glasses look identical, but one contains a mixture and the other contains a compound.
Is sugar-water a mixture or a compound? Define mixtures and compounds, and explain how, without tasting it, Nicole can test to make sure she is using the sugar-water in the glaze.
Answers
Answer:
sugar-water is a mixture not a compound.(homogeneous mixture.)
Explanation:
Compounds are substances formed by the chemical combination of two or more elements. Mixtures are substances formed by physically mixing two or more substances together.
The solution of sugar in water is considered a mixture not a compound because the particles of sugar and water are not completely dissolve nor mixed in a fixed proportion or ratio. hope this helped :)
Answer: Nicole can take a small amount of sample from both of the glasses, she can place the samples in two separate containers and leave them out in the sun, so that the water gets evaporated. One of the two containers will contain a residue of sugar. The one containing the sugar residue, is the sugar-water solution.
Which statement best describes how energy and matter move in a wave?
A
A wave transports energy without transporting matter.
B
A wave transports matter without transporting energy.
C
Neither energy nor matter is transported by a wave.
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Answer:
A wave e transports energy without transporting matter
Answer:
the answer is A. a wave transpory energy without transporting matter
Less than 3 percent of water on Earth is freshwater found in rivers, lakes, and streams with most of the freshwater frozen in ice caps and glaciers. Freshwater is the only type of water that people and other land animals are able to drink to survive.
True
False
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At what temperature does ice melt? (Celsius plss)
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Answer:
at 0 degree celcius ...
A molecule is what ?
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Answer:
Explanation:
A group of atoms bonded together and the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. They are made up of atoms that are held together by chemical bonds. These bonds exchange electrons among atoms.
A molecule is just a group of two or more atoms bunched together.
Properties of cotton ball
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Answer:
1. Absorbent
2. Breathable.
3. Hypoallergenic.
4. Non-toxic.
5. High wet modulus (stronger when wet)
6. Biodegradable.
7. Excellent wicking.
8. Wipe dry performance.
Answer:
Stringy, light, spherical, absorbant, small, and thread-like (because you can make cotton into clothes).
Where is the DNA stored in a cell?
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Answer: nucleus
Explanation:
For current or former high-achieving, overachiever, perfectionist, and hard-working students: What are three things you wish you could tell your younger, high-achieving self or other school kids who also have the same work ethic as you (basically other young perfectionists)? Multiple people can answer, and I will be marking brainliest on whoever has the best answer.
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Answer:
i dont know
Explanation:
I'm sorry i needed points for my own question! I only had 8:( sorry
Write one sentence defining elements and one sentence defining compounds.
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Elements – Elements constitute the simplest chemical substances in which all the atoms are exactly the same.
Compounds – Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio.
Explanation:
How did this piece of evidence change your thinking about the channel on Mars? Explain your ideas below.
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The piece of evidence changed thinking about the channel on Mars because it shows that the rock was formed next to flowing water as such rock formations exist on Earth and were formed by flowing water.
Was there flowing water on Mars ?The geologic process that could have created the channel on Mars is water moving. We can infer from the image that water running across the terrain on Mars created channels similar to those on Earth.
We can claim that the flowing of water creates the channels on Mars because when the water runs for a long period from the same region, it takes the sediments and creates channels.
Find out more on Mars at https://brainly.com/question/3964646
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Choose the most correct statement about metals
A. Metals have atoms, meaning they can be pulled into wires
B. Metals are reflective, meaning they can be pulled into wires
C. Metals are ductile, meaning they can be pulled into wires
D. Metals have luster, meaning they can be pulled into wires
Please help i've been struggling on this for a while
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Answer:
C. Metals are ductile, meaning they can be pulled into wires
How does Earth’s rotation affect the global pattern of prevailing winds? Explain your reasoning using evidence
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Answer:the air deflects toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere, resulting in curved paths.
Explanation:
What is the charge on the Cr in Cr2O72-
Answers
Answer:
+6.
Explanation:
So, a chromium atom here has an oxidation number of +6.
pls i need help with this vocab pls! ASAP
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1. phototropism
2. geotropism
3. tropism
4. biome
5. symbiosis
6. cortex
5. it’s what the person above me said
Yellowstone volcano
If you found out that Yellowstone was erupting, who would you want to find first?
Where do you think you would go to find safety?
If you survived, what do you think the World would be like after it was over?
How long would it be that way?
Can you think of another time in our Earth's history where something like this happened and affected a society of people?
Answers
If the Yellowstone volcano erupts I hope to find my family and I would stay at home. I believe that after this event, the sky would be opaque for a long time due to ash, something similar to the mass extinction of dinosaurs.
What is the Yellowstone volcano?The Yellowstone supervolcano is a volcanic caldera located in Yellowstone National Park (Wyoming) in the United States. The caldera measures approximately 55 × 72 km.
This volcano was formed during the last of the three super-eruptions that occurred over the last 2.1 million years.
What would happen if this supervolcano erupted?If the Yellowstone supervolcano were to erupt, it would produce a massive ash shower that would cover the entire United States for decades.
On the other hand, the climatological conditions would be modified, given the magnitude of the geological formation that rests, still active, below the National Park.
Learn more about Yellowstone in: https://brainly.com/question/24567147
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To find safety go inside well away from Yellowstone
The world would be filled with ash
A very long time over 5 years
The Big Bang or Chernobyl
How does fossil evidence support Wegener’s hypothesis of continental drift? *
A. Similar fossils found on far apart landmasses suggest that the continents were once a single landmass.
B. Fossil evidence suggests that the continents have always been in their current positions.
C. No similarities exist between fossils on different continents.
Plant and animal fossils show evidence of changes in Earth’s magnetism.
D. Plant and animal fossils show evidence of changes in Earth’s magnetism.
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Answer:
A
Explanation:
Jolene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemically?
a) burning the sugar cube with a match stick.
b) crushing the sugar cube and dissolving it in water.
c) dehydrating the sugar cube with sulfuric acid.
d) chewing the sugar cube and digesting it.
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Answer:2) crushing the sugar cube and dissolving it in water is the only physical change here.
Explanation: All the other shows chemical change.
When vinegar and baking soda are mixed together, they experience a chemical change.
What evidence given would lead a person to think that the change is a chemical change?
the solution heats up or cools off
the solution changes shape
the solution changes size
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The reason is temperature change.
chemical change could be a change of color or odor or formation of other things like gas or precipitate.
How to know how many electrons are involved in bonding of propane ?
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In the bonding of propane (\(C_{3}H_{8}\)), there are 18 electrons involved.
You must count the electrons in propane's bonding using its Lewis structure. Propane (\(C_{3}H_{8}\)) has three carbon and eight hydrogen atoms.
How to calculate bonding electrons:
Count the molecule's valence electrons.
Three carbon atoms supply 12 valence electrons since carbon possesses four.
Eight hydrogen atoms contribute 8 valence electrons.
20 valence electrons: 12 (carbon) + 8 (hydrogen).
Single-bond atoms to form the molecule's skeleton.
Propane's skeleton is H-C-C-C-H.
To complete atom octets, distribute leftover electrons.
Start by bonding each carbon atom to the surrounding hydrogen atom with two electrons.
Distribute the remaining electrons to satisfy the carbon and hydrogen octet rule.
Count bonding electrons.
Each bond has two electrons—one from each bonding atom. Propane has nine C-H bonds, therefore bonding electrons total: 18 electrons from 9 C-H bonds.
Learn more about bonding, here:
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8.
In our experiment that will compare how long it will take for 100 ml distilled water to evaporate from a from a 5" diameter container. This will be the control group. For the experiment group, we will use 100 ml of distilled water and dissolve 10 grams of table salt in the water. We will use the same diameter dish for both samples so the same amount of water surface is exposed to the air.
What would a good hypothesis be?
When the salt water was almost evaporated, the higher concentration of salt might have slowed the evaporation process by blocking the air from the moisture.
We think that a pure water sample will dissolve faster than a salt water solution because salt adds more mass to equal quantities of liquids.
It took a total of 31hrs. 15 min. to evaporate the pure water and 32hrs. 10 min for the salt water.
We poured the water into each 5" dish and set the containers on a table. We noted the time: 8:00 a.m. Saturday.
Answers
Answer:The answer is C: How long does it take distilled water to evaporate from a 5” diameter container?
Explanation:
In the air, a salt solution will evaporate more slowly than pure water.
What is Evaporation?
The process by which a liquid transforms into a gas state is called evaporation. A surface phenomena, that is. The amount of evaporation depends on the humidity. If the air is humid, it is virtually saturated, which means that evaporation will occur at a much slower rate.
Since evaporation takes place on the liquid's surface, the salt molecules that are present on the water's surface prevent as much water from evaporating. As a result, salt water evaporates more slowly than pure water.
As a result, the salt solution will evaporate from the air more slowly than pure water.
To learn more about evaporation
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Which statement is NOT true regarding natural vs. synthetic materials?
A) An example of a natural material is sand.
B) An example of a synthetic material is nylon.
C) Synthetic materials are made from natural resources.
D) Synthetic materials only have a negative impact on society.
Answers
Answer:
Option C
Explanation:
Answer:
Option C
Explanation:
which atom in each pair that has the greater electronegativity.
a. Ca or Ga
b. Br or As
c. Li or O
d. Ba or Sr
e. Cl or S
f. O or s
Answers
Answer:
A)Ga b)Br c)O d)Sr e)Cl f)O
Explanation:
Electronegativity will decrease the further you go down the periodic table and will increase from left to right. This makes fluorine the most electronegative just for reference.
Ex: Ca and Ga are on the same period but Ga is closer to the right so it’s the most electronegative
(I accidentally posted in comments first so ignore that)
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
PLs HELP ME LIKE ASAP
How do the light rays emitted by a candle travel?
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Answer:
Explanation:
The light rays coming from the unlit candle and the reflected light rays of the lit candle are superposed on top of one another. ... For very transparent substances like glass, only about 5 percent of the light that hits it is reflected. The remaining 95 percent is transmitted—it passes right on through.
Answer:
The light rays coming from the unlit candle and the reflected light rays of the lit candle are superposed on top of one another. ... For very transparent substances like glass, only about 5 percent of the light that hits it is reflected. The remaining 95 percent is transmitted—it passes right on through.
Explanation:
Pls can you help me, I give you brainlient if I get it right, Because of you!
Which statements describe events that occur during interphase? Check all that apply.
A cell grows to its full size.
The cytoplasm of the cell divides.
The nucleus divides into two identical nuclei.
Two identical cells are formed.
The cell copies its DNA.
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Answer:
A cell grows to its full size
How is density different from weight and mass?
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Hello there!
How is density different from weight and mass you say? It's simple!
1. Unlike weight, density is composed of mass and volume.
2. By dividing the mass over the volume, you can determine an object's density, while weight is the product of mass and gravity.
Hope this helps :) if so, can I get Brainliest?
Weight is how heavy an object is/ how much force it exerts
Mass is how much matter is in an object
I hope this helps! If you need the formulas on how to get them you can always comment and ask :)
What type of person studies and collects data on the weather?