Chemistry High School

Here is the actual question from before, I forgot to put the question in 0-0

Answers

Answer 1

Answer:

Evaluate \dfrac {9}m+4

+4start fraction, 9, divided by, m, end fraction, plus, 4 when m=3m=3m, equals, 3.

Explanation:

Related Questions

How do you determine the chemical reactivity for nonmetals by using the periodic table?

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Answer:

In Non-metals

Period - reactivity increases as you go from the left to the right. Group - reactivity decreases as you go down the group.

Explanation:

Science helPPPPPPPPP MEEEEEEEEE RIGHT NOW

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Its is b because that is how the galaxy works.

Hello ?? I need help I just started 6th grade and I’m new to this someone plz help me I’m begging I’ll give you brainlest and that’s a PROMISE !!

Answers

Answer: revolve:

365 days

causes seasons

rotate:

causes day and night

spins

go around

the one that has one earth goes in rotate the other one goes in revolve

Answer:

causes day and night goes in rotate365 days goes in revolvespins goes in rotate24 hours goes in revolvecauses seasons goes in rotationgo around goes in revolve

Explanation:

Earth is closer to the sun and revolves around it in about 365 days. Sentences: Earth revolves around the sun in 365 days, 5 hours, 59 minutes and 16 seconds. The time a planet takes to revolve around the sun is called a year there for 365 days would be revolve.

It takes the earth abut 24 hours, or one day, to make one complete rotation. At the same time, the earth is moving around the sun. This is called a revolution there for 24 hours is revolve.

the spinning of the earth is called rotation therefore its rotate.

Earth rotates on its axis; this causes us to experience day and night. But Earth's axis is tilted 23.5 degrees (the angle is measured between Earth's equatorial plane and the plane in which it orbits our Sun) therefore causes day and night is rotate.

Instead, Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane, that is, the plane of Earth's orbit around the sun. The tilt in the axis of the Earth is called its obliquity by scientists therefore causes of seasons is rotate.

Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth's rotation. At the same time that the Earth spins on its axis, it also orbits, or revolves around the Sun. This movement is called revolution therefore earth spins goes in revolve.

79. Which best describes what is made of matter? (1 point)
all living things and objects
all atoms
all solid objects and atoms
all living things

Answers

Answer:

all living things

Explanation:

In a balanced equation, the number of each type of atom on the reactant side ____________ the number of each type of atom on the product side.

Doubles

Equals

Halves

Tripples

Answers

Answer:

Equals

Explanation:

Which of these rules is applicable to subtracting two values that have different numbers of decimal places (for example, subtracting 2.1 from 2.15)? The answer is less accurate than either value. The answer is more precise than either value. The answer has the same number of decimal places as the least precise value. The answer has the same number of significant figures as the most precise value.

Answers

Answer:

The answer has the same number of decimal places as the least precise value.

Explanation:

i just took the test on edg or whatever its called but trust me i got 100.

These rules is applicable to subtracting two values that have different numbers of decimal places (for example, subtracting 2.1 from 2.15) will be "The answer has the same number of decimal places as the least precise value."

What is decimal?

The accepted method for representing both integer but also non-integer numbers would be the decimal digit system.

What is numbers?

A number is a numerical unit of measurement and labelling in mathematics.

Therefore, the correct answer will be option (C).

To know more about number and decimal.

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What does mitochondrial exactly mean ?

Answers

mitochondrial is a disease that has long-term side effects that is often inherited. Due to this, your body may fail to produce energy effectively.

Which example is a container holding a heterogeneous mixture? * 1 point Bowl of clear chicken broth. Balloon filled with He gas. Bottle of water. Glass jar filled with mixed US coins.

Answers

Answer:

Bowl of clear chicken broth

Explanation:

A bowl of clear chicken broth is a heterogenous mixture.

A heterogenous mixture is one in which the constituents exists in at least two different phases. A chicken broth is a heterogenous mixture which exists in the liquid - solid state. The broth is made up of simmered meat, vegetables and other recipes together.

Such mixtures can be:

Gas - liquids mixturesLiquid - solid mixturesGas - solid mixtures

A broth is an extract from cooking chicken. Some vegetables and extract are mixed together in a nutritious blend.

C. What kind of charge do protons have?
What is the mass of a proton?

Answers

Answer:

Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.

Answer:

A proton has positive charge of 1

1.6726219 × 10^-27 kilograms

Explanation:

5 of 7 What percentage of a material will persist after 80 minutes if it's half life is 20 minutes?

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Answer:

Explanation:

Part A: Name a system in humans that is similar to one of thejtissue systems of the plant, explain
how they are alike.
Click to add speaker notes

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you could argue that the skin or muscle system would be the closest related to the tissue system of plants.

What is a period on the Periodic Table? *

Each of the horizontal rows from left to right of the Periodic Table.

The columns from top to bottom of the Periodic Table.

The elements that are part of the noble gases.

Answers

Answer:

Explanation:En la tabla periódica los elementos están ordenados de forma que aquellos con propiedades químicas semejantes, se encuentren situados cerca uno de otro. Los elementos se distribuyen en filas horizontales, llamadas períodos.

All of the following undergo hybridization except

A. C
B. Si
C. Mg
D. B

Answers

Answer:

C: Mg

Explanation:

Hybridization of atomic orbitals is a fundamental concept introduced by Pauling that describes the mixing of orbitals at an atom which adds a definite direction to the Lewis - shared electron pair or electron chemical - bond concept.

Carbon(C) can hybridized on sp, sp2 and sp3 simply because it's valence shell gives room for it.

For silicon(si), when forming covalent bonds with other atoms, it's 3s and 3p orbitals are mixed with each other to form new hybrid orbitals.

Magnesium in itself doesn't hybridized except in magnesium hydrides.

Boron orbitals(B): when boron forms bonds with three other atoms like borazine, they are hybridized to either the sp2 or hybridized to the sp3 which occurs when boron forms bonds with four atoms just as is in metal borohydrides.

Food contains what form of energy?
-Nuclear
-Gravitational
-Radiant
-Chemical

Answers

Answer:

Chemical energies

Explanation:

We get chemical energy from foods, which we use to run about, and move and talk (kinetic and sound energy). Chemical energies are stored in fuels which we burn to release thermal energy - this is one way of making electricity, see Electricity for more information.

What is the relationship between the number of chromosomes in sperm/egg cells compared to regular cells?
A: sperm/egg cells and regular cells have the same number of chromosomes
B:sperm/egg cells have the twice the number of chromosomes as regular cells
C:sperm/egg cells have the half the number of chromosomes as regular cells
D:sperm/egg cells have the triple the number of chromosomes as regular cells

Answers

C ?
each sex cell has 23 unpaired cells, a regular cell would have 46.

Bridget is in science class. Her teacher gives her two unknown substances and asks her to determine their relative pH. She places a piece of red litmus paper into both substances. The litmus paper turns purple when she places it into substance I. The litmus paper turns blue when she places it into substance II.

Which of the following is true about the relative pH of the two substances?
A.
Substance I is an acid and substance II is a base.
B.
Substance I is a neutral substance and substance II is a base.
C.
Substance I is a base and substance II is a neutral substance.
D.
Substance I is a neutral substance and substance II is an acid.

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Answer:

Substance I is a neutral substance and substance II is a base.

As temperature increase and the volume stays constant, how will the pressure change

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Answer:

There will be more collisions and so a greater pressure. The number of particles is proportional to pressure, if the volume of the container and the temperature remain constant. ... Volume is inversely proportional to pressure, if the number of particles and the temperature are constant.

SOME HELP ASAP I NEED THIS DUE IN A few MINS

Remember I need TWO answers

Answers

Answer:

it might be B and A maybe im not 100 percent sure

In any experiment the accuracy of the data and experiment can be improved. What are some things that can be done to improve data and experiment accuracy?
Choose all that apply:

Conduct more trials.

Add more controls.

Add less controls.

Add more variables

Add less variables

Choose a different person to do the experiment.

Answers

Answer:

Conduct more trials.

Add less variables.

Choose a different person

Explanation:

More trials gives plenty of data to be examined.

Less variables makes for less confusion, and less things to keep track of.

Different person ensures that the experiment is not being done by one single person who could be messing up the data

Answer:

conduct more trials, less variables, more controls

Explanation:

more trials make it so if something goes wrong you have other data, less variables because you should only test one variable at a time, more controls helps set your base line for the experiment

plz ANSWER Energy exerted when a force of ____ N is applied over ____m of distance is called a__________

Answers

Answer:

1 newton over 1 meter is called a joule

Explanation:

i learned it before

The answers are
1n
1m
Not sure what the distance is

true or false: some organisms reproduce by cell division

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Answer:

True

Explanation:

What type of weathering will occur more rapidly in an area with extremely cold winters and hot summers?

Answers

Answer:

mechanical weathering through the process of ice wedging

Explanation:

Answer:

In cold climates, the freezing and thawing that occurs causes rapid mechanical weathering through the process of ice wedging. In warmer climates, chemical weathering is more rapid because the chemical reactions that dissolve rocks and minerals are accelerated by warm temperatures.

Explanation:

4. The compound iron sulfide can be formed by
filtering b. evaporating heating
a.filtering
C.heating
d. mixing

Answers

Answer:

When iron sulfide is exposed to oxygen it reacts rapidly, releasing large amounts of heat.

Explanation:

i took this from my notes- so whatever aligns with that. sorry if this didnt help but i think its genuinely c heating

I think the answer is c

pls help with these question because I don't understand what are pure substance and how to tell

Answers

Answer:

i am pretty sure its A

Explanation:

they are etheir together like black and white or some sort of pattern if notice.

If they are like B,C,D like that they are mixtures which are NOT PURE SUBSTANCE'S.

Answer:

option A is your answer.

Explanation:

Reason being is because that for the diagram if all of the little dots are connected another single dot then it is a pure but if one little dot isn't connected to another one then it isn't a pure substance.

Hope this helps!!!

Please help ASAP !!!!!!!!!

Answers

Answer:

A. the speed at which reactants change to products over a given time

Explanation:

The rate of reaction is a measure of the speed of a chemical reaction. In chemical kinetics, the speed at which the reaction occurs is the reaction rate.

The measurement of the reaction rate is based on the disappearance of a reactant or appearance of the product with increasing reaction time. Rate of reaction depends on the: nature of reactants. concentration of the reactants or pressuretemperaturepresence of catalystsunlight

The density of pure solid copper is 8.94 g/mL. What volume does 34 g of copper occupy?

Answers

hey there ! :

Density = 8.94 g/mL

mass = 34 g

Volume = ??

Therefore:

D = m / V

8.94 = 34 / V

V = 34 / 8.94

V = 3.803 mL

Hope this helps!

State the mass number and the atomic number of colbalt-60

Answers

the mass # is 58.933195 and the atomic #is 27

two samples of water, 10 grams and 50 grams are in sperate cups which of the following properties is different for the two boiling point, color density or volumn

Answers

Answer:

volume

Explanation:

The volume of the two samples of water will be different because volume is the amount of space occupied by a body. It is dependent on the amount of materials it contains.

The 50g sample will have a higher volume compared to the 10g sample. The boiling point and density are intensive properties and do not depend on the amount of matter present. Since both samples are from the same source, they will have the same color.

Answer:

its volume

Explanation:

How is covalent bonding typically explained?

Answers

Answer:

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

What is the example of artificial selection

Answers

Answer:

Dog breeding is another prime example of artificial selection. Although all dogs are descendants of the wolf, the use of artificial selection has allowed humans to drastically alter the appearance of dogs

Explanation:

Other Questions

Brady and 3 friends went to lunch. Their meal cost $32, and they left a 15% tip. How much was the tip? 1. As time passes Papa's behavior becomes increasingly erratic. To which of the following factors does Jeanne attribute this? A. Mama's emotional distance from her husband B. Papa has no business venture to be responsible for C. Papa's reliance on alcohol to get him though the day D. Papa's interrogation ordeal in Lincoln, South Dakota2. In the chapter entitled: "The Reservoir Shack: An Aside," the author changes voice. In which of the following passages is this change most evident? A. "The sergeant smiled suspiciously." B. "but when they turned off the light and stretched out on the cots" C. "The reservoir crew didn't blink" D. "My brother-in-law was foreman of a reservoir maintenance detail"3. The government asks the detainees to sign an Loyalty Oath. This causes a disturbance in the camp because A. it could mean the detainees would be sent to a different camp if they fail to sign it. B. it puts the women of the camp in danger of being drafted into the military. C. the way it is written offers the detainees no reasonable choice. D. the oath's intention is to introduce more harsh treatment of the detainees in the camp.4. The effect that Papa's return has on the family is best indicated by which of the following? A. Despite his return the family's problems continue. B. Jeanne's poor relationship with her father before he left is made much better as a result of his return. C. The fact that he seems in better physical shape than he was before inspires the family to survive. D. His return makes it possible for the family to stay together.5. The author characterizes Woody as A. having given up his efforts to make the best of the family's circumstances. B. resentful of his and his family's captivity by the American government. C. having found his life passion of professional acrobatics. D. doing the best he can to fulfill the role of head of the household.6. The author often uses metaphor to get her point across. Which of the following passages from her book provides the best example of this? A. "This was like bloodying the nose of God." B. "But these were still unfamiliar visits from a demon we had never seen when we lived in Ocean Park." C. "He would save this up and concoct brews in a homemade still he kept behind the door" D. "During that first summer and fall of sandy congestion and wind-blown, the bitterness accumulated"7. The Wakatsuki family is housed in a setting characterized as A. row after row of wood-framed barracks, six units each, none with cellars. B. two-story brick buildings with dark, often muddy basements. C. clusters of large canvas tents set in circles around a central shack. D. single unit masonry buildings with crawl spaces underneath.8. Context clues such as graphics, pictures, and charts aid comprehension by A. drawing the reader's attention to important words and phrases. B. using certain synonyms and antonyms. C. comparing and contrasting important information. D. drawing reader's attention to syntactical clues.9. Which of the following best indicates the reason Papa wants to stay in camp when he learns that it is soon to close? A. He is frightened by the prospect of having to return to Japan. B. He realizes he has absolutely nowhere to go. C. He wants to stay until Woody comes back from the war. D. He thinks another war is looming on the horizon.10. In which of the following passages is the author's use of figurative language most evident? A. "Mama's first concern, meanwhile, as always, was how to keep money coming in." B. "To maintain some hold on his self-esteem Papa began to pursue his doomed plan" C. "No record of his fishing boats remained. It was another snip of the castrator's scissors, and he never really recovered from this" D. "As soon as the front door was closed, Papa went in and flushed it, and when it worked, we all hooted with delight." 2. A squirrel runs 15 m to the north and finds an acorn. The squirrel then turns back to the southand runs 8 m, at that point he decides to change direction and runs 24 m to the east to bury hisacorn. 2. The probability that a car will come to a complete stop at a particular stop sign is 0.4. Assume that the next four carsarrive at the stop sign are independent of one another. Find each of the following probabilities:a) None of the four cars come to a complete stop? 6500x0.93 divide by 12 he cell cycle is essential for ensuring that our cells don't grow too large. Explain why it is necessary for cells to remain small in size. Please hurry! What is our bodys hidden strength? Consider quadrilateral LMNO. Quadrilateral L M N O is shown. Angle L is (25 x) degrees and angle N is (22 x + 9) degrees.If quadrilateral LMNO is a parallelogram, what must the measure of angle LMN be?mLMN = WHY did The Confederacy in battle of fort donelson What did the Separate Car Act state?a. Railroad cars must be separated and inspected after each use.b. Men and women were not allowed to travel in the same railroad cars.c. Railroads had to provide separate accommodations for both whiteand African American passengers.d. White and black Americans had to ride in railroad cars together. Please help me!:)Find the slope of the line on the graph.Write your answer as a fraction or a wholenumber, not a mixed number or decimal.Enter the correct answer Which closing best expresses a desire to satisfy the customer and signals confidence that the problem has been resolved? a. We appreciate that you let us know about your unfortunate situation. We hope you agree that we demonstrated how much we consider customers our No.1 priority. We can't give you cash for your defective bag, but you can exchange it for an item of equal or lesser value at any retailer that carries the Yuma brand. b. Thanks again for writing. Your satisfaction is our utmost goal. We hope that the new bag will help you get over your disappointment and the inconvenience of buying a defective product. As I said before, such flaws are extremely rare. c. Please take the defective gym bag to any retailer carrying our brand to exchange it for a new hard-wearing Yuma bag. From 1750-1830, we have studied shifting political ideologies and desire for change in many areas around the world. Summarize some of the new ideas that became very popular after the Enlightenment that led to people challenging their forms of government and exposing inequalities in their nations. People who gain an understanding for the deep-level diversity among their coworkers do so after_______ interactions, often leading to an increased degree of___________. A. Briefly explain how a loss of water by evaporation would affect the initial calculation of the solubility of your salt. B. Would this initial evaporation affect the calculated solubility of your salt at each subsequent experimental saturation temperature, or just the initial temperature? Explain. What part of slope-intercept form is the rate of change"? 2.34 L of N2 is how many molecules of N2 What division of Christianity did Justinian follow? find the answer to this question4.20.07 1. What is the desire of mankind according to Hobbes?