Answer:
The answer is D
Answer:
Almost posotive its A
Explanation:
(7th grade chemistry) What makes a polyester, nylon and acrylic a synthetic materials/ products, in other words what happen during polyester, nylon and acrylic chemical reaction?(or what happen during a chemical reaction)
Explanation:
What you call polyester is technically polyethylene terephthalate or PET plastic molded into filaments that are then woven into fabric. It's made in a chemical reaction between ethylene glycol and therephthalic acid, and these chemicals are derived from fossil fuels, air, and water.
Nylons are condensation polymers or copolymers, formed by reacting difunctional monomers containing equal parts of amine and carboxylic acid, so that amides are formed at both ends of each monomer in a process analogous to polypeptide biopolymers. Most nylons are made from the reaction of a dicarboxylic acid with a diamine or a lactam or amino acid with itself
The binder resin in acrylic paint is man-made, most of the time in some sort of lab. It is made generally from the monomer methyl methacrylate and also any real common catalyst. The catalyst speeds up the reaction to where the monomers create extremely long chains. Which result in polymethyl methacrylate, an acrylic plastic polymer.
The pigments are also mostly made in labs/factories. Most of the time they are either pure elements like pure cobalt powder and carbon charcoal, or they basic bounded compounds like cadmium sulfide. To make cadmium sulfide you react cadmium chloride with hydrogen sulfide to make a bright yellow solid. It is then washed and heated to make a spectrum of different colors.
Basically all of acrylic paints are man-made through various chemical reactions.
plzzzzzzz help meeeeeeee
Answer:
because one is going into your mouth and the other you feel with your hand.
Explanation:
idek
HELP PLEASEEEEEEEEEEEEEEEEEEEEEE
Solve and whoever get it right first gets brainlest
Breanna is investigating the changes in various solids as they are heated. She places four unknown solids into individual test tubes and heats them at the same rated. She records her observations after 0, 10 and 20 mins.
Answer: well it wouldbe 10 min
Explanation:
**URGENT< WILL MARK BRAINLEST****What is true when a reaction reaches equilibrium? Select all that apply. *
There is more product than reactant.
The reaction has stopped.
The reaction is faster in the forward direction.
The reaction is faster in the backward direction.
The concentration of products and reactants is constant.
There is more reactant than product.
The reaction rate is equal in both directions.
Answer:
below
Explanation:
The reaction rate is equal in both directions.
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time.
Reaction rates of the forward and backward reactions are equal and there are no changes in the concentrations of the reactants and products, the amount of reactants and products present is constant.
For example, balanced chemical reaction: N₂(g) + O₂(g) ⇄ 2NO(g).
How is precambrian time different from other divisions of the geologic time scale?
Precambrian time is different from other divisions of the geologic time scale as the life forms in this time had soft bodies.
What are geologic time?Geologic time is the time that is begins at the start of the Archean eon and it is the extensive interval of time occupied by the geologic history of the earth.
Precambrian time is the the earliest time of the geologic ages, which are marked by different layers of sedimentary rock including the fossilized remains of plants and animals buried when the sediments were formed. Main difference between both the times is in Precambrian time life-forms had soft body parts and in Geologic time life-forms had hard body parts.
Hence main difference is of life forms.
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The boiling point of a substance will be the same temperature as its
melting point
condensation point
freezing point
sublimation point
Answer:
condensation point
Explanation:
boiling point is the temperature that a liquid turns to gas,
condensation is the point a gas turns to liquid
A natural resource that is not replaced by nature in a useful time frame.
A. non-renewable resource
B. natural resource
C. renewable resource
D. conservation
(For science)
Based on the "Heating Curve for Wax," what is the boiling point for wax?
255°C
50°C
340°C
155°C
Use your answers from questions 3 and 4 as the basis for the second section of your lab report. This section provides your reader with charts, tables, or drawings from the lab. You also need to include answers to the follow-up questions and ways in which you would improve the lab.
And here are answers 3 and 4
this is 4: I would recheck, redo, and revise my answers, if necessary. Also, I can look at the lesson again, if I forgot something. I would recheck my answers to see those are my final answers and then Summit.
here is 3: drawings that showed the cells . what I learned in this lab for the pictures of the cells we have to figure out if they were eukaryotic prokaryotic unicellular multicellular plant animal or neither
Answer:
Explanation:
I think its 4.
Answer:
4
Explanation:
How is biodiversity related to niches?
Responses
A. In an ecosystem, the niche is how an organism makes its living.
B. Biodiversity is required to support keystone species' niche.
C. The more niches in an ecosystem, the greater the biodiversity.
D. The fewer niches in an ecosystem, the greater the genetic diversity within a species.
Answer:
C. The more niches in an ecosystem, the greater the biodiversity.
Explanation:
Horizontal lines indicating a phase change will be at different temperatures depending on the substance.
True
False
Answer:
true
Explanation:
I just know
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A substance that is uniform in composition, made up of two or more atoms in the same place, and NOT chemically combined is a _______________.
element
homogeneous mixture
compound
heterogeneous mixture
Answer:
homogeneous mixture
Explanation:
from goigle
What did you discover about the polarity of rocks on the ocean floor near the Mid Atlantic Ridge? pls help its for an essay due soon
Explanation:
When lava gets erupted at the mid-ocean ridge axis it cools and turns into hard rock. As it cools it becomes permanently magnetized in the direction of the Earth’s magnetic field.Less than 60 years ago, scientists discovered that the Earth’s magnetic field has reversed its polarity (direction) hundreds of times during the past several hundred million years. A polarity reversal means that the magnetic North flips to where we know the South Pole is. At the mid-ocean ridge spreading axis, these flips in the direction of the Earth’s magnetic field are recorded in the magnetization of the lava. This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges.
These patterns of stripes provide the history of seafloor spreading. Geophysicists can read these patterns from the magnetic anomalies they measure with a magnetometer. Where the magnetic wiggles, or anomalies, are broader, the spreading rate has been faster. At slow spreading ridges, the anomalies are squeezed tighter together, but the basic patterns are quite similar so scientists can correlate or relate the magnetic wiggles to different parts of the global mid-ocean ridge.
Which best explains how rotation affects the colors we see in the sky at dawn and dusk?
A. At dawn and dusk the rotation of Earth slows down so the light from the increased sunlight creates colors.
B. At dawn and dusk, Earth has rotated closer to the Sun, so the heat creates the colors in the sky.
C. At dawn and dusk, sunlight is closer to Earth’s curved surface, refracting in the atmosphere, creating colors.
D. As dawn and dusk, the light from the Sun is fading and phases through all the colors of a prism in a cycle.
Option (c) best describes about the rotation that, how it affects the colors we see in the sky at dawn and dusk.
What is dawn and dusk?'Dawn' is the early morning time or sunrise time and 'Dusk' is the twilight time or sunset time.
When earth is rotating at its own place, so at the dawn and dusk time sun is near to the horizon line and distance between the earths surface and sun is less as compared to the day time. And at that time red light travels much easily to the earth side due to long wavelength and blue color travels at the day time when distance is more. Due to scattering and refraction of light we are able to see colors.
Hence, at dawn and dusk, sunlight is closer to Earth’s curved surface, refracting in the atmosphere, creating colors.
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Heating a substance____the speed at which molecules move
Answer:
Heating a substance increases the speed at which molecules move.
Explanation:
What is the significance of the water in the oceanic crust and subduction?
Answer:
Oceanic crust, the outermost layer of Earth’s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges, which occur at divergent plate boundaries.
Explanation:
Which solid is most dense? ______________________________
Which liquid is least dense? ______________________________
Which solid is about as dense as dish soap? ______________________________
Answer:
bolt
lamp oil
cherry tomato
A block is pulled 0.90 m to the right in 4.5 s. What is the block's average speed to the nearest tenth of m/s?
Answer:
The average speed of the blocks are 0.36 m/s.
Explanation:
Average speed is defined as the ratio of distance covered per unit time. So if it is said that blocks are pulled to 0.9 m in the right side. This means the blocks cover a distance of 0.9 m from the origin and that distance is covered in 2.5 s. Thus, the average speed can be calculated from the change in speed with respect to time. As at time t = 0 , the speed is also zero, and at time t = 2.5 s , the speed will be.
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
Answer:
-
Explanation:
This formula shows the chemical reaction that occurs when the body breaks down sugar. The products are carbon dioxide and water.
How many carbon atoms are needed in this reaction?
Answer:
i like nuggs
Explanation:
Copper and gold have similar reactive properties. On the Periodic Table of the Elements, these elements are most likely to...
Select one :
A || have nearly the same mass.
B || have the same number of protons.
C || be in the same group.
D || be in the same period.
Answer:
C. Be in the same group
Explanation:
Most elements in the same group have similar properties.
Copper and gold have similar reactivity properties, thus they are most likely to belong to the same group. Thus option C is correct.
The reactive properties or the chemical properties of an element have been based on the presence of the valence electrons in the atom.
The valence electrons in the atom are responsible for the bond formation and other intermolecular interactions thereby contributing to the reactivity of the atom.
In the periodic table, on moving down the group, the number of valence electrons to the atoms remains constant with the increase in the size of the atom. Thus, the elements belonging to the same group have consisted of similar reactivity properties.
Copper and gold have similar reactivity properties, thus they are most likely to belong to the same group. Thus option C is correct.
For more information about the reactive properties, refer to the link:
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What is the correct equation to determine pressure?
Pressure = Force + Area
Pressure = Force - Area
Pressure = Force / Area
Pressure = Force * Area
I really need help with this Im lost
Based on the "Heating Curve for Wax" what is the melting point of the wax?
250°C
0°C
50°C
150°C
Which shared derived characteristic do reptiles, marsupials, and dogs have?
Amniotic egg
Fur
Retractable claws
Shearing teeth
Answer:
Shearing teeth
Explanation:
Just use process of elimination. Dogs don't lay eggs, reptiles don't have fur, neither of them have retractable claws, so the only one left is shearing teeth.
Which of the following organisms evolved after amphibians?
Only cats
Only reptiles
Only marsupials and cats
Reptiles, marsupials, dogs, and cats
Answer:
Reptiles, marsupials, dogs, and cats
Explanation:
The correct answer is only reptiles as they evolved after amphibians.
Amphibians were one of the earliest groups of land-dwelling vertebrates to evolve. After amphibians, reptiles emerged. Reptiles are a diverse group of cold-blooded vertebrates that includes animals such as lizards, snakes, turtles, and crocodiles. They have adapted to a wide range of environments, including deserts, forests, and oceans.
The other options provided in the question, such as cats, marsupials, and dogs, did not evolve after amphibians. Cats and dogs belong to the mammal group, which evolved much later than amphibians. Marsupials, on the other hand, are a group of mammals that includes animals like kangaroos and koalas. While marsupials did evolve after amphibians, the question specifically asks for organisms that evolved "after amphibians," excluding any other groups that may have evolved concurrently.
So, the correct answer is "Only reptiles" because reptiles evolved after amphibians.
Learn more about amphibians,here:
https://brainly.com/question/31785803
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5.
Which statement accurately describes the atoms of a specific element?
a.)A zinc‚ Zn‚ atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus.
b.)A scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus.
c.)An indium‚ In‚ atom contains 115 protons inside the nucleus and 49 neutrons outside the nucleus.
d.)An aluminum‚ Al‚ atom contains 27 electrons and 27 protons inside the nucleus.
PLZ HELP ASAP!!! THANK YOU
Organisms that make their own food (photosynthesis or Chemosynthesis) are called:
Question 1 options:
Multitrophs
Fungis
Heterotrophs
Autotrophs
Please help !! Science !!
just tell me in your answer what each one is !
thanks !
Answer: PUMPKIN
Explanation:
Identify the rock that forms at A.
Sedimentary
Metamorphic
Igneous
Identify the rock that forms at D.
Sedimentary
Metamorphic
Igneous
Identify the rock that forms at C. *
4 points
Sedimentary
Metamorphic
Igneous