In which pair of elements are both metalloids?
Sn and Sb
Sb and Te
Te and I
I and Xe
Answers
Answer:
Sb and Te
Explanation:
there are on the stair step
Related Questions
ZOOM IN TO SEE, But which one would be the correct answer this is easy!
Answers
Answer:
B.
Explanation:
What is an ellipse please help)
Answers
In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.
Maybe they might use that math thing for Science.
A system in chemical equilibrium
A. responds to oppose change.
B. has particles that do not move.
C. is undergoing visible change.
D. is stable only when all of the reactants have been used.
Answers
Answer:
its B
Explanation:
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objectives(s):
In your own words, what is the purpose of this lab?
Hypothesis:
In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
Procedure:
The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.
Data:
Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.
Hydrogen Helium Lithium Sodium Carbon Nitrogen
Moon One
Moon Two
Planet One
Planet Two
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
Using two to three sentences, summarize what you investigated and observed in this lab.
Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?
If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)
We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Why might it be useful to determine the elements that a planet or moon is made up of?
Answers
which of these describes a chemical property of a substance
Answers
Answer:
B. option
Explanation:
Melting of wax shows both physical and chemical change.
The wax melts is physical whereas near the flame, it burns and gives rise to carbon dioxide, water vapour, heat, light etc.
Hope it helps :)
Answer: B
Explanation:
A chemical property is a characteristic of a substance that can be seen during a chemical reaction. In this case only B has a chemical reaction where Wax is melting, while the other's are physical properties
Which of these can be combined to make a mixture?
a. solid and a liquid
b. two solids
c. two liquids
Answers
Answer:
c
Explanation:
you cant mix a rock and a rock together and expect to get a mixture
and you cant mix a rock and water and expect them to mix
so its on logical that it is two liquids
Why is it that when you step out of the shower into a warm bathroom you
begin to shiver?
Answers
Answer:
This tightening and relaxing of muscles in quick succession causes a slight bodily shake or tremble. It's your body's way of generating heat. This momentary cold sensation or cold jolt can rip through your body unexpectedly — sometimes starting in the spine and moving downward
Explanation:
To change into gas and evaporate, the water on your body needs heat energy, which comes from your surroundings
What type of bond is expected between two carbon atoms?
a. non polar covalent
b. polar covalent with the partial negative on the fluorine
c. plasmic
d. ionic
Answers
Carbon Forms Covalent Bonds
Carbon Forms Covalent BondsThe most common type of bond formed by carbon is a covalent bond. In most cases, carbon shares electrons with other atoms (usual valence of 4). This is because carbon typically bonds with elements which have a similar electronegativity.Jul 28, 2019
Explanation:
Hope it works out!ᕦᶘ ᵒAdri㉨annaᵒᶅᕤ
A student predicts that a solution of ethanol (C2H5OH) and water will have a lower density at room temperature than that of pure water. Which tools would most help the student test this prediction?
Will give brainly
Answers
A student predicts that a solution of ethanol (C2H5OH) and water will have a lower density at room temperature than that of pure water. By taking moisture the student can test this prediction.
What are the properties of ethanol ?Ethanol is a natural plant fermented by-product which can also be produced by the process of hydration of ethylene.
It is an important industrial reagent, can be used as a solvent, for the synthesis of solvent, organic chemicals and some additive to automotive gasoline.
Its chemical formula is C2H6O, two carbon atoms and one oxygen atom where as the structural formula is C2H5OH indicating that the two-carbon chain has a hydroxyl group.
Ethanol is always a liquid at room temperature and has the melting point of 156K and a boiling point of 351 K.
It is used in making many medicines like cough syrups, tonics, any proportion of ethanol is soluble in water.
Direct consumption of even a small quantity of pure ethanol is lethal to body.
Learn more about ethanol, here:
https://brainly.com/question/18763189
#SPJ2
ecosystems!!!!!!!! 3 questions PLEASE ANSWER I NEED THEM BY FRIDAY
1. What would happen if there were no abiotic factors in an ecosystem?
Plants would be unable to grow and produce oxygen for the animals.
Animals would grow and flourish.
The ecosystem would get too much rain.
2.Bacteria would become the consumer instead of the decomposer.
Which of the following correctly shows the cycle of biotic factors in an ecosystem?
A. Bacteria produce food and oxygen; animals eat the plants, breathe the oxygen, and produce carbon dioxide; and plants break down dead animals and produce minerals.
B. Plants produce food and oxygen; bacteria eat the plants, breathe the oxygen, and produce carbon dioxide; and animals break down dead plants and produce minerals that help plants grow.
C. Plants produce food and oxygen; animals eat the plants, breathe the oxygen, and produce carbon dioxide; and bacteria break down dead plants and animals and produce minerals that help plants grow.
D. Animals produce food and oxygen; bacteria eat the plants, breathe the oxygen, and produce carbon dioxide; and plants break down dead animals and produce minerals.
3. the pictures
Answers
Answer:
For your first question, the answer is "Plants would be unable to grow and produce oxygen for the animals"
Explanation:
.
Q1) Plants would be unable to grow and produce oxygen for the animals.
Q2) C
and I don't understand Q3. Sorry :(
HELP! 100 POINTS! A cinder block is pulled 0.50 meters to the right in 3 seconds. What is the block's average speed to the nearest hundredth of a meter per second (m/s)?
Answers
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
Speed =
0.9 = 0.36
2.5
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.
2.5
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.
How does sleeping help us maintain homeostasis?
Answers
Answer:
Sleep homeostasis denotes a basic principle of sleep regulation. A sleep deficit elicits a compensatory increase in the intensity and duration of sleep, while excessive sleep reduces sleep propensity
Explanation:
:]
Answer:
Sleeping helps us maintain homiostasis because our bodies need rest and when we sleep we get to rest.
Explanation:
Robert is thinking about buying a new refrigerator. His old refrigerator runs at about 43% efficiency. Which most likely accounts for the remaining 57% of the energy?
A: It is used up by the light in the refrigerator.
B: It is released to the surroundings as heat
C: It is converted into mechanical energy.
D: It stored as a form of potential energy.
Answers
Answer:
D it stores as a firm of potential energy
GIVING BRAINLYEST PLEASE HELP ASAP!!!!
Circle the correct words to complete the sentences. 1. Precipitation falls in these two forms: Solid / Liquid / Gas 2. Evaporation changes gas / liquid water to ice (solid) / water vapor (gas). Use evidence to support your answer.
Answers
2. Liquid and gas.
This is supported because precipitation falls in hail (solid), and Rain (Liquid).
The second part is supported because the sun turns water into gas, using heat (evaporation)
2 liquid and gas
Explaination
Because precipitation falls in hail and rain
As solid and liquid respectively
And about second part sun turns water on vapour by evaporation means liquid and gas respectively
When excess _____ flow into an aquatic ecosystem, a chain of events may take place which leads to a low dissolved-oxygen level in the water. This is called eutrophication.
Group of answer choices
nutrients
gas particles
water and sand
solid substances
Answers
Answer:
solid substances
Explanation:
Which diagram represents an electrically neutral atom?
Answers
Answer:
D
Explanation:
I hope this right, I'm sorry if it's not.
For an atom to be neutral, it has to have the same amount of protons and electrons. Because protons and electrons have opposite charges, when there is an equal amount of them they balance each other out
The diagram that represents an electrically neutral atom is:
Option D
What is an electrically neutral atom?Whenever a molecule has an equivalent number of electrons and protons, it has an equivalent number of -ve electric charges (the electrons) and +ve electric charges (the protons). The all-out electric charge of the 0 is thusly zero and the particle is supposed to be unbiased.
Thus, option D is correct.
Find more information about Neutral atom here:
brainly.com/question/24652228
Which one of these does not affect the climate of a place?
Ocean currents
Ground cover
Latitude
Mountains
Answers
Why many cell organelles contain folded or stacked membranes
Answers
Answer:
The many folds result in more surface area for ribosomes to attach and thus allowing protein synthesis to occur at a more efficient rate.
Explanation:
The molecular diagram of a substance is shown above. The first picture is the substance before it was heated. The second picture is the substance after it was heated.
Which of the following state changes most likely occurred in the diagram above?
A.
liquid to solid
B.
solid to gas
C.
liquid to gas
D.
solid to liquid
Answers
It is solid first because it has no space to move but on the second one there is a lot of space and it is moving around which means it’s a liquid
HEEEELP!!! THIS IS DUE TODAY
What is one of the most important forms of energy? Give two examples of how this type of energy is used in our lives.
Answers
Refrigeration used electrical energy.
Answer:
"There is no God but Allah, and Muhammad is his messenger." This is the basic statement of the Islamic faith: anyone who cannot recite this wholeheartedly is not a Muslim. When a Muslim recites this they proclaim: That Allah is the only God, and that Muhammad is his prophet.
I hope u find the right path
Explanation:
Once again rocks and/or minerals
How could you determine whether
an unknown substance is a mineral?
Answers
Answer:
you can classify a mineral by its appearance and other properties. The presence of a mineral is defined by the color and luster, and the color of the powdered mineral is described by the band. Every mineral has a distinctive density. To compare the hardness of rocks, the Mohs Hardness Scale is used.
Explanation:
Answer:
Luster, hardness , colour , clevage and magnetism
Explanation:
1. Luster makes sure the light is reflected by the mineral.
2. On the 10-point Mohs scale, which is basically a scratch test, hardness is measured. Take an unidentified mineral and scrape it like a fingernail with an object of known hardness.
3. Zurite, for instance, is often a deep blue, and malachite is gray.
4. In minerals that appear to divide along one or more flat surfaces or planes, cleavage may be observed.
5. Magnetite, for instance, has a heavy pull that even weak magnets can draw. But there is only a poor attraction to other minerals, particularly chromite (a black oxide) and pyrrhotite (a bronze sulfide.)
Properties of cotton ball
Answers
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).
Explain how thinking about chemicals at the atomic and molecular scale can help to explain observable phenomena, such as the changes you see when you etch copper.
Answers
Not a straight up answer, but moreover to help you get it: (Circuit Boards)
Aside from the tasks it performs, perhaps the most important function of a circuit board is providing a way to integrate the electronics for a device in a compact space. A PCB allows components to be correctly connected to a power source while being safely insulated. Also, circuit boards are less expensive than other options because they can be designed with digital design tools and manufactured in high volume using factory automation.
Partially straight up, helping you get the answer: (Copper Chloride)
Copper(II) chloride is the chemical compound with the chemical formula CuCl 2. This is a light brown solid, which slowly absorbs moisture to form a blue-green dihydrate.
Etching helps us to see the structure of the atoms of copper.
What is etching?The term etching refers to the process by which we expose the inner structure of copper. It is usually done electrically or by the use of an acid. The surface of the copper is removed and the inner structure of the copper is shown.
As such, when you etch copper, you can see the inner structure such as the arrangement of the atoms of copper and how they fit together.
As such looking through the etched copper would help you to appreciate that matter is composed of atoms.
Learn more about etching of copper:https://brainly.com/question/28190564
#SPJ1
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
Compare the human and the Amoeba together, here are the questions you'll be answering.
How does the
organism move?
How does the
organism breathe?
How does the
organism eat?
How many cells are in
the organism?
Neat fact (one) about
your organism.
Neat fact (two) about
your organism.
Neat fact (three) about
your organism
Answers
Answer:
1.They can move in a variety of ways, including walking, running, jumping, crawling, climbing, swimming, gliding, and flying.
2.Can breathe thanks to our respiratory system and lungs.
3.All animals eat other living things to obtain food. Carnivores consume other animals, whilst herbivores consume vegetation. As omnivores, or animals that consume both plants and other animals, humans are. Feeding on decomposing plants and animals are decomposers like fungus and earthworms.
4.36,2 trillion cell units. Although not the final figure, this is a pretty strong beginning.
2. They breathe through the lungs with the help from the contraction and expansion of the intercostal muscles
3. They use their teeth to eat
4. There are trillion cells
Heat energy is transferred on earth by the processes of convection, conduction, and radiation. How does heat energy cause materials to move during convection? Choose two statements that apply.
A. It causes colder materials to rise
B. It causes denser materials to sink
C. It causes warmer materials to sink
D. It causes less dense materials to rise
Answers
Colder materials sink
And warmer materials rise
What is causing the increasing amount of CO2 in the atmosphere? What could be done about it?
Answers
Calculate the volume (in cm3
) of 54 g
of water at 1 ∘C
.
Express the volume in cubic centimeters to two significant figures.
Answers
People use hot air balloons to rise high above the ground and be pushed by air currents from one place to another. The diagram shows a hot air balloon.
A type of chemical reaction, called combustion, takes place between propane and oxygen in the burners.
a. Describe a likely result of this chemical reaction that allows a hot air balloon to rise.
b. Describe a design feature the distance a hot air balloon can travel. Explain your reasoning.
Answers
Fueled by propane cylinders, gas jets produce the hot air that fills the envelope (similar to ones you might use on a portable camping stove).
WorkingSince heated air rises, hot air balloons are functional. with the rest. As though it were floating in water, the balloon rises as a result of this. The balloon naturally starts to slowly deflate if the air is allowed to cool.The molecules in the air start to migrate and spread out as the air within the balloon is heated, which results in a decrease in the air's density. The heated air is pushed below the cooler, surrounding air. the warm air is pushed upward as a result of this.For more information on hot air balloon kindly visit to
https://brainly.com/question/11178349
#SPJ1
What is the working resistance of a bulb that takes a current of 0.25 A when it is connected to 220V mains supply?
Show working
Answers
Answer:
data given we have a current of 0.25A and potential difference of 220V then from ohm's law I=V/R 0.25A=220V/R cross multiplication you get 0.25A×R=220V divide by 0.25A on both side you get 880 ohms