Chemistry High School

FOR 40 points!!!! I need the whole page finish !!!!!! Pleaseeeeee!!!!!!! I will five u brainlist !!!!!!

FOR 40 Points!!!! I Need The Whole Page Finish !!!!!! Pleaseeeeee!!!!!!! I Will Five U Brainlist !!!!!!

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Answer 1
Can you help meee with mine

Related Questions

A family pool holds 10,000 gallons of water. How many cubic centimeters is this?

Answers

Answer:

3.785412e+7cm³

Explanation:

Have a nice day.

H2O2 → H2O + O2

This is showing the reaction that we used in elephant’s toothpaste. Write and balance this equation on your own sheet of paper. If 24.53 g of hydrogen peroxide decompose, how many grams of water are produced.

Answers

Answer:

75.47

Explanation:

AS WE CANT WEIGHT AIR THE ANSWER IS CORRECT

Which set of data is more precise?
O 1, 2, 1, 2
O 1,1.5, 1.5, 1
O 0.5, 1, 2,1.5
O 1, 2, 2, 1.5

Answers

Answer:

01,1.5,1.5,1

Explanation:

Im dum.b help
When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."

Which statement corrects the error in the passage?
Question 3 options:

A baby grasshopper is a larva.

A baby grasshopper is a nymph.

The grasshopper nymph hatches.

The nymph has no exoskeleton.

Answers

Answer:

2.A baby grasshoper is a nymph.

Explanation:

Answer:

yourinagenjitsulol

Expert

75 answers

3.6K people helped

Answer:

2.A baby grasshopper is a nymph.

Explanation:

i agree

how many grams are in 7.4 moles of HgS?

Answers

Answer:  1721.6 grams

Explanation:

4.91 M NaOH solution (density=1.04g/ mL)

Answers

Uhhhhhhhhhh................

how many moles are in 32.3g of calcium phosphate

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Answer:  the formula mass of calcium phosphate [Ca3(PO4)2] is 310.177 amu, so its molar mass is 310.177 g/mol. This is the mass of calcium phosphate that contains 6.022 × 1023 formula units.

Answer: 310.177

The answer is 1 mole

An object with a
mass acclerates slower.

Answers

Higher amounts of mass

A CANDLE WILL STAY LIT INSIDE THE SPACE SHUTTLE WHEN IT IS ON THE LAUNCH PAD, BUT NOT WHEN IT IS IN ORBIT. WHY?​

Answers

Answer:

because there is no oxygen in space for it to burn

because all fire need oxygen to burn

Explanation:

what element has the same number of valence electrons as argon

Answers

Answer: There are two elements actually and those elements are Carbon and Silicon

Explanation:Plz mark brainliest if im right

Can Someone Please help me answer this question? I will try to give brainliest.

Answers

Answer:

I believe the answer is y-axis

Explanation:

Sorry if it's not I just wanted to help you in return for helping me!!

Answer:

Y axis I think

Explanation:

Can somebody help me please! Help would be much appreciated :))

Answers

Answer:

The first picture shows how the two H athoms finds each other. The second one, how these H athoms start's to form a covalent bond describing it by Lewi's estructure. And the last one, shows how the two athoms of H formed an H2 molecula.

Explanation:

During spontaneous fission, a nucleus of 25498Cf can produce 11846Pd, four neutrons, and what other nuclide?

Answers

Answer: 52Te - Tellurium

Explanation: Radioactivity occurs when an unstable nucleus of an element decompose into a stable element by emitting particles or forms of eletromagnetic energy. There are types of radioactivity and Spontaneous Fission is one of them.

In Spontaneous Fission, the unstable, also called parent, nucleus splits into two smaller nuclei and emitts one or more neutrons.

The reaction spontaneous fission of Cf is represented below.

25498Cf ⇒ 11846Pd + 4n + X

The characteristics of each element of the equation are:

1) The element Cf has atomic mass 254 and atomic number 98.

2) Element Pd has atomic mass 118 and atomic number 46.

3) Neutron is represented as n, has no atomic number and atomic mass 1.

Given these properties, to determine the other nuclide, we have to find out the nuclide's atomic number, as each element in the periodic table has its own atomic number.

At the left side of the equation, atomic number is 98. At the right side, element X's atomic number is

98 - 46 + 0 = 52

In the periodic table, the element with atomic number 52 is Tellurium, whose symbol is Te.

The other nuclide for the spontaneous fission is Tellurium (Te).

How many moles are there in 17.6g NaOH?

Answers

Answer:

The answer is 39.99711. We assume you are converting between grams NaOH and mole. You can view more details on each measurement unit: molecular weight of NaOH or mol This compound is also known as Sodium Hydroxide.

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.44moles are there in 17.6g NaOH.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The stoichiometry represents the number of moles.

Mathematically,

number of moles of NaOH =given mass of NaOH÷ molar mass of NaOH

Molar mass of 1 mole of NaOH= 40 g/mol

mass of NaOH=  17.6g

Substituting all the given values in the above equation, we get

number of moles of NaOH = 17.6g ÷  40 g/mol

number of moles of NaOH  =0.44moles

Therefore, 0.44moles are there in 17.6g NaOH.

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What did Albert Einstein say was the nature of electromagnetic radiation?

Answers

Answer:

Albert Einstein proposed the wave-particle theory of electromagnetic radiation. This theory states that electromagnetic energy is released in discrete packets of energy—now called photons—that act like waves.

Home can use ____to distribute warm air from a sunroom

Answers

Answer:

Solarpannels? I honestly don't know I'm just trying to be helpful.

How does energy play a role in different rock types forming? I had this question another time in my test and it's asking the same thing again.

Answers

Answer:

Yes

Explanation:

Yes, there are many energy forces that directly affect the formation of rocks and other substances. The Sun itself provides both energies in the form of heat/radiation and magnetic energy. Heat can get so intense when combined with pressure from being so far underground that it causes rocks to melt and become magma, which combines with other minerals and forms new types of rocks when they cool in the future. Magnetic energy helps push and pull the waves and wind on Earth which ultimately break down rocks into sand over the years.

(Popcorn Stand) A salt shaker has 2.91 moles of NaCl, how many grams of NaCl are in the salt shaker?

Answers

Answer:

170 grams NaCl

Explanation:

Find the mass of NaCl by adding the two elements atomic mass

Na: 22.99

Cl: 35.45

22.99+35.45=58.44 g

Convert moles to grams.

2.91 mol NaCl * 58.44 g NaCl= 170.0604 g

The answer would be 170 grams NaCL

You do an experiment in which you need 0.25 mole of tyrosine (C,H11 NO3).

How many grams must you weigh out?

A). 45.3 g
B). 90.5 g
C). 181 g
D). 272 g

Answers

Answer:

B.90.5 g

Explanation:

not 100%sure hehe

Answer:

45.3

Explanation:

I got it wrong on my test and this was the only correct option for me.

Please help!! I'll name you brainliest!!

Answers

Answer:

the awnsers are A and C

Explanation:

because

Part 1)
One reaction that produces hydrogen gas can be represented by the unbalanced chemical equation- Mg(s) + HCl(aq) −→ MgCl2(aq) + H2(g).
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Answer in units of g.
Part 2) What mass of MgCl2 is produced? Answer in units of g.
Part 3) What mass of H2 is produced? Answer in units of g.

Answers

Umm well this I do not know someone should know tho

Answer:

Part 1: 229.95g

Part 2: 598.5g

Part 3: 12.6g

Explanation:

Note: I learned this last week. Answer not sure.

Pls tell me if i got it right or wrong.

Mg + HCl - > MgCl2 + H2

First, balance the equation.

There is only 1 H and 1 Cl at the left side. BUT there are 2 Cl and 2 H at the right side. So you can add a 2 in front of HCl to balance it.

Mg + 2HCl - > MgCl2 + H2

Formula 1: (n= m/mr)

n = moles, m= mass, mr = molecular mass

Formula 2: (n= v/24)

v = volume

Part 1

What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?

Ratio of

(look at the number in front of each)

2HCl : Mg

2 : 1

(3.15 x 2) : 3.15 moles

6.3 moles : 3.15 moles

So 2HCl has 6. 3 moles

Now use formula 1 (n = m/mr)

Calculate molecular mass of HCl

Check your periodic table

mr of HCl =(1 + 35.5) = 36.5

6.3 = m/36.5

m = 229. 95grams

Part 2

What mass of MgCl2 is produced? Answer in units of g.

Ratio of

2HCl : MgCl2

(1 +35.5) : (24+35.5x2)

36.5: 95

229.95g :?

229.95g : 598.5g

m = 598.5g

Part 3

What mass of H2 is produced? Answer in units of g.

2HCl : H2

36.5 : 2

229.95g :?

229.95g : 12.6g

m = 12.6g

Ground water, the largest source of fresh water, is stored in bodies of rock and or sediment
a. porosity
b. sediment
c. particles
d. aquifers

i dont even know what this means

Answers

Answer:

particles

Explanation:

oof oof oof oof oof oof oof

Abel was running a fever of 107 degrees Fahrenheit, what was her temperature in degrees
Celsius?

Answers

Explanation:

we know the formula to convert farenheit to Celsius

=(F-32)(5/9)

=(107-32)(5/9)

(5/9)=375/9= 41.6 degrees Celsius

HELP !!!!!!!!!!!!! PLEEEAAAAASSSSSSEEEE

Answers

I need help with the same thing
match the solstice with the season of that month

spring equinox: march 21-22

summer solstice: june 20-21

winter solstice: december 21-22

fall equinox: september 22-23

How does environmental changes affect animals?

Answers

Environmental changes affect animals depending on their ability to adapt to new conditions.

What is adaptation?

An adaptation is any type of phenotypic feature associated with a higher fitness in a particular environment.

Adaptations are features that allow organisms to adapt to challenging environmental conditions.

In conclusion, environmental changes affect animals depending on their ability to adapt to new conditions.

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32 g of CH4 react with 128 g of O2, producing 88 g of CO2. How many grams of water are produced?

Answers

Answer:

88 g

Explanation:

32 g of CH4 react with 128 g of O2, producing 88 g of CO2.

Which plant structures are common to all angiosperms?

spores
flowers
cones
endoskeleton

Answers

Is (B) flowers
How do I know this I did it before and got it right

Answer:

B

Explanation:

what is the formula mass of MgO (how much does one mole of it weigh)

Answers

Answer:

40.3044 g/mol

Explanation:

hope this helps

When solid copper reacts with aqueous silver nitrate, the products are copper (II) nitrate and silver metal. How
many grams of silver would be produced from 83.94 grams of silver nitrate?

Answers

Answer:

This chemical equation means: One mole of solid copper plus two moles of aqueous silver nitrate produce one mole of copper(II) nitrate plus two moles of solid silver. This is a single replacement reaction in which the metal copper replaces the metal silver.

Explanation:

Hope this help

(25 POINTS AND BRAINLIEST)What is the volume of 2 mol of chlorine gas at STP?
2.0 L
11.2 L
22.4 L
44.8 L

Answers

Answer:

44.8

Explanation:

According to standard temperature and pressure and ideal gas equation , the volume of 2 mole of chlorine gas at STP  is 44.8 liters.

What are standard temperature and pressure conditions?

Standard temperature and pressure are defined as a standard set of conditions required for experimental measurements which are established to allow comparison between different sets of data.

Standards which are commonly used are those International Union of pure and applied chemistry and national institute of standards and technology.These are not universally accepted standards but are the ones which are commonly used.

Standard conditions of pressure and temperature are necessary to define standard reference conditions used to express volumes of liquids and gases.

These values are important to physicists, chemists ,engineers ,pilots and navigators.On substituting values in ideal gas equation, volume= 2×8.314×273/1=44.8 liters.

Thus, the volume of 2 mole of chlorine gas at STP  is 44.8 liters.

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Other Questions
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He's just seeing it now."Hannah felt nauseated. Things like this had happened at her school before, and she knewthat they never ended well. Leo had a very good question. Why are people so mean? That was areal mystery. Someone probably posted something online thinking it to be funny. They didn't thinkabout how Leo would feel when he found out, and they obviously didn't think about how it wouldfeel if anyone did that to them.Just then, the principal walked into the class looking stern and angry. "Will and Emily. Myoffice. Now!" he barked. The two students kept their heads down as they gathered their bags andleft the room, desperate not to look at anyone as they left. Hannah realized that they were alreadyembarrassed about what they'd done. Maybe they were already thinking about how upset theirparents would be when they found out from the principal exactly how callous, thoughtless, andmean they'd been.No one saw Will and Emily at school again that day.The next morning, when Hannah got to her classroom, she saw everyone standing outside,gazing at the lockers. As she approached, she noticed that people were smiling and laughing.There were colored sticky notes on each of the lockers. As she got closer, she began to smile - thepositive energy was contagious, and she hadn't even seen what was on there yet. Each locker had at least two sticky notes on the door. Some sticky notes had silly jokes;some said things like, "What do you call a dinosaur who likes words? A Thesaurus!" Others hadpositive statements, such as, "You are truly wonderful!" Everyone was reading each other's lockernotes and sharing the jokes. Hannah joined in and was pleased to see Leo laughing along witheveryone else. At one point, someone said, "Mine says I am clever and funny," and Leo replied, "No,it says ... ", and then didn't finish his sentence. No one else noticed, but Hannah thought this was abit strange. She caught Leo's eye and smiled at him. He smiled back before turning to someoneelse.Hannah thought about Sherlock Holmes's words. The art of investigating is in seeing whatothers don't see. All of her classmates were looking at the lockers when someone said, "Who didthis?" No one owned up, but everyone kept smiling.It took a while before people realized that Will and Emily were now on the outskirts of thegroup, trying to get to their lockers. Both of them were obviously still humiliated by their actions.Hopefully they regretted their actions. Their heads were bowed, and they didn't try to talk toanyone. Hannah saw them look at the sticky notes on their lockers. On both of them it said, "Be thebest person you can be!" No one else had the same message on his or her locker, apart from Willand Emily. Just then, everyone else moved into the classroom. Just before she went in, Hannahheard Leo say good morning to them both before he went in. Emily and Will looked surprised, notjust at their lockers, but at Leo's greeting, too.When their teacher arrived, he said, "The lockers look great, but I don't think this shouldhappen every day. Does anyone want to own up to this? No? Okay, let's just leave it then." Hannahcaught Leo's eye. He looked at her, gently nodded his head toward her, and smiled. Then he put hisfinger to his lips and looked away. Hannah realized that she'd solved her second mystery, but thistime, she didn't need to share her achievement with others. What Leo had done was very special,and maybe one day, she'd talk to him about it. One day, but not today. You read three mysteries about Hannah, the eleven year old detective. Explain how Hannah's approach to solving mysteries reveals her character traits. Support your response with evidence from all three stories. What is the solution to the equation 4(2y 4) 4y = 4? (put number answer only) Which device does the author use throughout the passage? Choose the inequality that shows x is bigger than 2.A.2 xC.2xD.2x Solving Systems using tablesMikayla put $212 in a savings account at the beginning of the year. At the end of each month, she withdrew $12 from her account. Mathew put $30 in his savings account at the beginning of the year. At the end of each month, he deposited $14 in his account. Let x represent the number of months which have passed and y represent the amount in each savings account.A. Write an equation to represent the amount in Mikaylas savings account.B. Write an equation to represent the amount in Matthews savings account.C. Below make an input-output tables that show the amount in each account for the first 8 monthsD. When will Mikayla and Matthew have the same amount in their accounts?Mikayla MatthewX Y X Y0 01 12 23 34 45 56 67 78 8 how is Pluto different from planet X?A. Planet X was never discovered; Pluto was B. Planet X Is a gas giant; Pluto is a dwarf planet C. Planet X has several moons; Pluto has no moonsD. Planet X contains single-celled life forms; Pluto does not using four or more complete sentences,Describe the three different law used by the middle eastern governments 1. In what ways does Du Bois criticize and in what ways does he seem to embrace the idea of inborn racial characteristics and abilities? 2. How does Du Bois appeal to both American and world history to bolster his claim to inclusion and equality for black Americans? What is CD equaled to ? I remember well the remark made to me once by one of my teachersand a very good teacher, too, who nevertheless did not see what her own observation ought to have suggested. School-children, she said, regard teachers as their natural enemies. The thought which it would have been logical to suppose would have followed this observation is, that if children in general are possessed of that notion, it is because there is a great deal in the teachers treatment of them which runs counter to the childs nature: that possibly this is so, not because of natural cussedness on the part of the child, but because of inapplicability of the knowledge taught, or the manner of teaching it, or both, to the mental and physical needs of the child. I am quite sure no such thought entered my teachers mind,at least regarding the system of knowledge to be imposed; being a sensible woman, she perhaps occasionally admitted to herself that she might make mistakes in applying the rules, but that the body of knowledge to be taught was indispensable, and must somehow be injected into childrens heads, under threat of punishment, if necessary, I am sure she never questioned. It did not occur to her any more than to most teachers, that the first business of an educator should be to find out what are the needs, aptitudes, and tendencies of children, before he or she attempts to outline a body of knowledge to be taught, or rules for teaching it. It does not occur to them that the childs question, What do I have to learn that for? is a perfectly legitimate question; and if the teacher cannot answer it to the childs satisfaction, something is wrong either with the thing taught, or with the teaching; either the thing taught is out of rapport with the childs age, or his natural tendencies, or his condition of development; or the method by which it is taught repels him, disgusts him, or at best fails to interest him.When a child says, I dont see why I have to know that; I cant remember it anyway, he is voicing a very reasonable protest. Of course, there are plenty of instances of wilful shirking, where a little effort can overcome the slackness of memory; but every teacher who is honest enough to reckon with himself knows he cannot give a sensible reason why things are to be taught which have so little to do with the childs life that to-morrow, or the day after examination, they will be forgotten; things which he himself could not remember were he not repeating them year in and year out, as a matter of his trade. And every teacher who has thought at all for himself about the essential nature of the young humanity he is dealing with, knows that six hours of daily herding and in-penning of young, active bodies and limbs, accompanied by the additional injunction that no feet are to be shuffled, no whispers exchanged, and no paper wads thrown, is a frightful violation of all the laws of young life. Any gardener who should attempt to raise healthy, beautiful, and fruitful plants by outraging all those plants instinctive wants and searchings, would meet as his rewardsickly plants, ugly plants, sterile plants, dead plants. He will not do it; he will watch very carefully to see whether they like much sunlight, or considerable shade, whether they thrive on much water or get drowned in it, whether they like sandy soil, or fat mucky soil; the plant itself will indicate to him when he is doing the right thing. And every gardener will watch for indications with great anxiety. If he finds the plant revolts against his experiments, he will desist at once, and try something else; if he finds it thrives, he will emphasize the particular treatment so long as it seems beneficial. But what he will surely not do, will be to prepare a certain area of ground all just alike, with equal chances of sun and amount of moisture in every part, and then plant everything together without discrimination,mighty close together!saying beforehand, If plants dont want to thrive on this, they ought to want to; and if they are stubborn about it, they must be made to.In the context of the passage as a whole, the authors description of her teachers views in the middle of the first paragraph (I am quite . . . questioned) is best characterized as afrank reconsideration of an early assessment of the teachers intelligenceAcareful reflection on the biases that influenced her teachers judgmentBcalculated effort to expose an unfit teacher to the publics disapprovalCsatisfying resolution to a long-standing puzzle from the authors youthDmoving depiction of the lasting effects of a painful childhood eventE How has the development of the commercial airline industry affected life in the usA. By decreasing the demand for alternative energy.B. By reducing air pollution levels in cities.C. By reducing travel time over long distances.D. By decreasing government regulations on travel. Before a renovation, a movie theater had 138 seats. After the renovation, the theater has 173 seats. What is the approximate percentage increase of the number of seats in the theater? If necessary, round to the nearest tenth of a pe How many moles is 415 g Fe? Which goes where ? Mitosis Vs. Meiosis need this right now plz help me Read this stanza from The Song of Wandering Aengus by William Butler Yeats.When I had laid it on the floorI went to blow the fire a-flame,But something rustled on the floor,And someone called me by my name:It had become a glimmering girlWith apple blossom in her hairWho called me by my name and ranAnd faded through the brightening air.How do these lines reveal details about the speaker of the poem?A They confirm his stable state of mind.B They show that he longs to connect with someone.C They suggest his despair over being alone in the world.D They show that he is frightened by the natural world.