Chemistry High School

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Answers

Answer 1

Answer:

Plumbing System

Explanation:

Answer 2

Answer:

C plumbing system

Explanation:

Infrastructure is the basic structures needed for the operation of society

Related Questions

How would you determine an atom's charge?

Answers

Answer:

The charge of an atom is the number of protons minus the number of electrons.

A student has a sample of solid calcium. It is shiny and metallic looking. He squeezes a pipet of concentrated sulfuric acid onto the calcium. Bubbles are produced and the calcium appears to disappear. The test tube gets hot. What kind of change occurred?

Answers

Answer:

Physical change

Explanation:

There are two types of changes: physical change and chemical change. Physical change is defined as the change that changes the physical appearance of the substance and do not affcet the chemical composition of the substance whereas chemical change causes changes in the chemical composition of the susbstance.

The given example shows physical change because solid calcium undergoes sublimation. process in which a solid substance changes into gaseous phase directly without undergoing liquid phase.

Hence, the correct answer is "Physical change".

Is Magnesium less reactive than Aluminum ? Yes or No

Answers

Answer:

The answer is no

Answer:

yes

Explanation:

some metals are reactive than others. Example: (a) Magnesium is more reactive than silver. (b) Magnesium reacts with oxygen but silver doesn't because magnesium is more reactive than silver.

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2. If a person in a wheelchair wanted to get to the second story of a two-story building, would it be easier to
take a short, steep ramp or a long, shallow ramp? Explain.

Answers

Answer:

The short steep ramp would be much harder because you will have to work more against gravity.

Explanation:

The long shallow ramp would be easier to take than the short, steep ramp because the person would have to use more force on the short, steep ramp to push the wheelchair against the force of gravity.

What is an inclined plane?

An inclined plane or a ramp can be defined as a flat supporting surface tilted at an angle, with one end higher than the other, utilized as an aid for raising or lowering a load.

The inclined plane can be defined as one of the six classical simple machines developed by Renaissance scientists. Inclined planes can be utilized to move heavy loads over vertical obstacles.

Moving a body up an inclined plane needs less force than lifting it straight up, at a cost of an increase in the distance moved. The mechanical advantage, the factor by which the force is decreased, is equal to the ratio of the sloped surface's length to the height it spans.

The inclined plane provides the same amount of work to be done with a smaller force exerted over a greater distance. The angle of friction or the angle of repose can be defined as the maximum angle at which a load can rest motionless on an inclined plane because of the friction without sliding down.

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If all the deer disappeared from this community, which change would be most
likely to occur?

Answers

Answer:

i think the grass population would decrease

Explanation:

Answer:

The Coyote population would decrease

Explanation:

i must be present in a compound for it considered organic

Answers

Answer:

Carbon

Explanation:

Organic compounds must contain carbon. They also usually contain hydrogen, oxygen, and often nitrogen and other compounds such as phosphorus.

Nearly all organic compounds contain carbon-hydrogen bonds.

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Answers

Answer:

I want to say E or B

Explanation:

What is the difference between a compound and a mixture?

Group of answer choices

A compound is just a mixture of elements.

A mixture can be physically separated into its components; a compound cannot be physically separated into its components.

The components of a mixture do not have the same properties individually as they do when mixed.

A compound can be physically separated into its components; a mixture cannot be physically separated into its components.

Answers

Answer:

Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances. Compounds can be of three types, which are: covalent compounds, metallic compounds and ionic compounds.

Answer:

The answer is a mixture can be physically separated into its components; a compound cannot be physically separated into its components.

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Answers

Answer:

Explanation:

Answer:

A. Sorry if wrong, but if i'm right can you mark brailniest pls?

Compare and contrast Transverse Waves and Longitudinal Wave

Answers

there, so you can have choices, though they all mean the same thing.

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Answers

Answer:

Hi!

The best way you can receive a Brainliest is to help others. You shouldn't focus on receiving a brainliest, rather being glad you helped someone who needed it.

I hope you take this advice and answer a question! :)

Identify the atom
H₄
CH₄
N

Answers

Answer:

Organic Molecule.

Explanation:

Any molecule with C atoms and H atoms are organic molecules in chemistry.

Examples could be C₄H₅, C₉H₁₈O₆, C₅H₁₂N.

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which option is an example of a physical change??

A breaking chemical bonds

B forming chemical bonds

C nuclear decay

D melting a substance

which option is an example of a chemical change
A ironing a shirt

B melting cheese

C grinding powder

D fireworks exploding

Answers

Answer:

Explanation:

Melting of ice is a physical change as there no new compound is forming only state is changing So Option D is correct option. For second question Option D is correct option as combustion reaction is taking place.

What is chemical change?

Chemical change is a reaction in which breaking and forming of new bonds take place. One molecule completely converted to totally different molecule. The number of atoms remains same

One famous example of chemical change is the rusting of iron. The color, odor and arrangements of atoms in products are very much different from reactant. Chemical change are mostly irreversible in nature. Physical change is just opposite of chemical change. Phase change is an example of physical change.

Thus option D is correct option in both cases.

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what is the orbital notation for silver?

Answers

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d10

Explanation:

I think

1s2 2s2 3s2 i think i’m not sure

Which of the following statements regarding the moon and Earth is correct? Question 9 options: A) The moon is older than Earth by approximately 300 million years. B) Earth is tidally locked, while the moon spins on its axis. C) Earth and the moon have nearly the same mass. D) Earth and the moon are nearly the same age.

Answers

The statement 'The moon is older than Earth by approximately 300 million years' is True (Option A).

When did the Moon form?

The Moon formation refers to the geological period of time in which our natural satellite emerged as an independent celestial body.

It has been proposed that the Moon emerged first compared to the Earth (approximately 300 million years).

In conclusion, the statement 'The moon is older than Earth by approximately 300 million years' is True (Option A).

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How do clastic sedimentary rocks form?

Solid chemicals in water harden and form rocks.

Fragments of rock are squeezed and cemented together.

Lava cools and hardens into rock.

Plant and animal remains are squeezed and cemented together.
Plz help I give the brainlyest

Answers

Answer: solid chemicals in waterharden and form rocks

Explanation:

Answer:

Fragments of rock are squeezed and cemented together.

Explanation:

I took the test and got the answer below:

Who was martin Luther king and how is he celebrite

Answers

Answer: martin luther king jr

Explanation: He led peaceful protests against the discrimination that the people of the United State did against African American men, women, and children. He was a celebrity due to his have "I a dream speech" that he said in front of the lincoln memorial. Plus he didn't approve of violence when trying to protest African American rights.

Answer:

Who is Martin Luther King and why is he famous?

Exsplanation

A Baptist pastor and civil rights activist, King worked to end legal segregation of blacks in the United States. He gave his famous “I Have a Dream” speech at the August 1963 March on Washington, and won the Nobel Peace Prize in 1964 at age 35 – the youngest man to have received the award.Apr 4, 2018

what is the first step of scientific method A.Hypothesis
B. question
C.control
D.procedures

Answers

Answer:

Explanation:

Question. You need to ask questions before you can set up to perform an experiment.

A rectangle has a width of 7 inches height of 14 inches and a length of 12 inches find it’s volume

Answers

the answer would be 1,176. you solve by using (L*H*W)

Identify arrows pointing to nonbonding electrons.

Answers

Answer:

Explanation:

Yessir

Which situation aUggeata that an experlment han rellable renultn?
A. The experiment use8 a very uimple procedure
B. The experiment generates ldeau for new experimenta
C. The experiment can be repeated with the aame outcome.
D. The experiment aupports the hypothesls.

Answers

Answer:

Shiny like a limousine

You're spending like a cash machine

Smile, show your golden teeth

That's how you cover up your cavities

You're glowing like a diamond ring

I saw you bought some other things

You're spending like a cash machine

To cover up your insecurities

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Explanation:

The volume of an unknown liquid is shown in the graduated cylinder. The mass of the liquid is 105 grams.

What is the density of the unknown liquid?

A 3500 g/mL
B .33 g/mL
C 3.0 g/mL
D 3.3 g/mL

Answers

The answer I got is C. 3.0 g/mL .

Answer:

the answer is c

Explanation:

ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
What does Planck's equation E = h × v determine?

the number of lines on the atomic spectrum for an atom
the color of the lines on the atomic spectrum for an atom
the energy released as an electron moves to a higher orbital
the energy released as an electron moves to a lower orbital

Answers

the color of lines

Explanation:

on the atomic spectrum for an atom

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A teacher placed a plastic cup of warm coffee with a lid in the freezer.
Which statement describes the frozen coffee in comparison with the warm
coffee?
A. The amount of coffee is the same.
B. The speed of the coffee molecules has increased.
C. The temperature of the coffee has increased.
D. The arrangement of the coffee molecules is the same.

Answers

Answer: The answer is A

Explanation:.

What mass of benzene takes
up
325 mL if its density is
0.874 g/mL?

Answers

Answer:

The answer is 284.05 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 325 mL

density = 0.874 g/mL

We have

mass = 325 × 0.874

We have the final answer as

284.05 g

Hope this helps you

Calculate the average atomic mass of silver if 13 out of 25 atoms are silver -107 and 12 out of 25 atoms are silver -109

Answers

Answer: 107.96amu

Explanation:

(107x.52)+(109x.48)

55.64+52.32=107.96

The chemical formula for hydrogen
peroxide is H2O2. What is the total
number of atoms in one molecule of
hydrogen peroxide?
A 2
B 4
C6
D 8

Answers

I think that it is 4 because there is 2 hydrogen and 2 oxygen so that equals 4 atoms in total

what are the physical characteristics of sand

Answers

Answer:

what do you mean by this ?

Explanation:

Answer:

Sand has a grainy form

Explanation: That's all I know for now

I need help with that box

Answers

I hope this helps.

the first line would be SN, 50, 50, 69

second line would be PT, 78, 78, 117

third line would be MO, 42, 42, 54

fourth line would be NI, 28, 28, 31

fifth line would be U, 92, 92, 146

PLZZ HELP!!
An atom has atomic number 11 and mass number 23. How many electrons does the atom have?
23
22
O 12
O 11

Answers

Answer:

Explanation:

23-11, why?, because, the difference between atomic and mass number is the neutron number which most a times is equivalent to the electron number.

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Which equation does not represent a function? Why? A) y = x2; There are two outputs for each input. B) y2 = 4x; There are two outputs for each input. C) y = x; The output value is the same as the input value. D) y = x; The output value is the opposite of the input value. Greg paid $3.60 for a package of 8 nails at the home store. John paid $3.18 for a package of 6 nails at the hardware store. How much more did John pay per nail than Greg?(PLS HELP ( . *)^( . *) How many atoms of aluminum (Al) are contained in 3.73 moles of alumni 7 -14m = 2m - 5 multi step variables on both sides The Call of the Wild draws heavily on Jack London's own experience during the Klondike Gold Rush. Consider the following question: What would it be like to live in a society without rules? Imagine a world that is wild. Characters compete for resources, so trust could be dangerous. What is your character expecting and feeling? Your response should be about 150 words. Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions.Online Content: Site 1In a scatterplot what does the term outlier mean? The following unadjusted trial balance is prepared at fiscal year-end for Nelson Company. Nelson company uses a perpetual inventory system. It categorizes the following accounts as selling expenses: Depreciation ExpenseStore Equipment, Sales Salaries Expense, Rent ExpenseSelling Space, Store Supplies Expense, and Advertising Expense. It categorizes the remaining expenses as general and administrative.NELSON COMPANY Unadjusted Trial Balance January 31 Debit CreditCash $22,150 Merchandise inventory 13,000 Store supplies 5,100 Prepaid insurance 2,800 Store equipment 42,800 Accumulated depreciationStore equipment $19,250Accounts payable 17,000Common stock 4,000Retained earnings 25,000Dividends 2,100 Sales 115,900Sales discounts 2,100 Sales returns and allowances 2,000 Cost of goods sold 38,000 Depreciation expenseStore equipment 0 Sales salaries expense 12,900 Office salaries expense 12,900 Insurance expense 0 Rent expenseSelling space 8,000 Rent expenseOffice space 8,000 Store supplies expense 0 Advertising expense 9,300 Totals $181,150 $181,150Additional Information:a. Store supplies still available at fiscal year-end amount to $2,550. b. Expired insurance, an administrative expense, for the fiscal year is $1,720. c. Depreciation expense on store equipment, a selling expense, is $6,500 for the fiscal year. d. To estimate shrinkage, a physical count of ending merchandise inventory is taken. It shows $10,720 of inventory is still available at fiscal year-end. Required:a. Compute the current ratios as of January 31, 2017. b. Prepare a multiple-step income statement for the year ended January 31.c. Prepare a single-step income statement for the year ended January 31. The siboglinid tube worm, found at deep-sea hydrothermal vents and cold seeps, has no digestive tract. It relies on symbiotic bacteria that live in the tube worms tissues. The bacteria oxidize hydrogen sulfide or methane for the worm.What type of relationship is this? Describe some aspects of your self-concept that have been created through social comparison Do you think any of the color mutations in the beetles helped them survive in the environment? Explain your answer. PLEASE HEP!! I WILL GIVE BRAINLIEST TO BEST ANSWER!! PLEASE INCLUDE AN EXPLANATION!! I'm clueless on this Test Dynamic Earth question I will literally venmo you $10 if you can help me I'm really desperate here thank youA seismograph station is located several thousand kilometers from an earthquakes epicenter.Explain the order that the S and P waves will arrive at the station.By using the characteristics of the S and P waves explain why they arrive in the order they do. which line has a constant of proportionality between y and x of 5 Find the distance between the two point (-6,6) and (3,-6) Which describes elements in the first group of the periodic table? Alguien quiere hablar conmigo estoy aburrida Cross out any letter below that is capitalized or abbrevaited incorrectly.1. home of mrs goodwrench What happens to the wave on the string when you decrease the amplitude? D=(x2+x1)+(y2-y1) this is the formula I need number 19 Please will mark brainliest and 50 points (x7) - 3 = 4What does x = How do I solve for x x divided by 7 - 3 = 4 how do i find out what X equals