Chemistry High School

Please help me with this chemistry work !!!!!

Answers

Answer 1

Answer:

1. Mn

2. Se

3. Al

4. Na

5. Ca

6. IE

7. Mg

8. Sb

9. Sn

10. H

Explanation:

Related Questions

Which conclusion do the graphs support?

Phosphorus is required for the growth of the phytoplankton.

Phosphorus is required for the growth of the phytoplankton.

Phytoplankton cannot withstand high levels of phosphorus present in the estuary.

Phytoplankton cannot withstand high levels of phosphorus present in the estuary.

Phosphorus harms the growth of phytoplankton in the estuary.

Phosphorus harms the growth of phytoplankton in the estuary.

Phytoplankton growth does not depend on the amount of phosphorus.

Phytoplankton growth does not depend on the amount of phosphorus.

Answers

Answer:

Phosphorus is required for the growth of the phytoplankton.

Explanation:

How many moles of carbon are needed to produce 8 moles of carbon sulfide

Answers

0.4 is the answer

hope it very helpful

The atomic masses of two isotopes of Zinc are 64 and 66. If Zinc has 27 electrons, what is the number of protons and neutrons in each isotope?

Zinc-64 : Number of protons __________ Number of neutrons ______________
Zinc-66 : Number of protons __________ Number of neutrons ______________

Answers

Answer:

Zinc-64: Number of protons is 30. Number of neutrons 34.

Zinc-66: Number of protons is 30. Number of neutrons 36.

Explanation:

The atomic number of Zinc is 30, so in every Zinc atom, regardless of whether it's an isotope or not, will always have 30 protons.

The atomic number of an equivalent to the number of protons, and never changes.

The isotope number is the sum of the protons and neutrons in the nucleus.

Isotope number = atomic number + neutrons

So if we have 30 protons, and we're trying to find the number of neutrons in Zinc-64 we just subtract 30 from 64.

64 - 30 = 34

So now we know that there are 34 neutrons in Zinc-64

Same thing goes for Zinc-66.

66 - 30 = 36

There are 36 neutrons in Zinc-66.

Hope that's helpful!

Which is a way to express concentration of a solution?
parts per billion
moles
molar mass
force per square meter

Answers

Answer:

A. Parts Per Billion

Explanation:

ED 2021

Answer:

Explanation:

How is the energy transformation in a bouncing ball similar to those of a pendulum

Answers

Answer:

Similar to the movement of a pendulum, an enormous wrecking ball when held at a height possesses potential energy, and as it falls, its potential energy is converted to kinetic energy. As the wrecking ball makes contact with the structure to be destroyed, it transfers that energy to flatten or take down the structure.

Explanation:

I hope this helps :)

This is a Chemical bond where two atoms are sharing 1 or more electrons among the separate elements of a compound
O Covalent Bond
O lonic Bond
O Ambient Bond
O Metallic Bond

Answers

Answer:

Covalent bond

How does height affect the speed of a falling object?

Answers

Question :-

How does height affect the speed of a falling object?

Answer :-

Equation:- v²-u² = 2aS

let the case of body be dropped

u = zero ( initial velocity ) a = g ( constant falling under gravity)S = initial height of the body from the groundv = final speed of the body

by further solving :-

v²-0 = 2aS

v² = 2aS

2a is constant

so :-

v is directly proportional to the √S

so we can say that speed of the falling body increase with increase in the square root of the height from which is dropped or falling

What is the main advantage of a compact
fluorescent light bulb?

Answers

Answer:

The advantages of compact fluorescents are they are energy efficient, compact in size, have good lumen maintenance, long life, endless shapes and sizes, dimmable, easy retrofit, low operating cost, and radiate less heat.

Explanation:

1•) What is the universe made of?
2•) How did life begin?
3•) Are we alone in the universe?
4•) What makes us human?
5•) What is consciousness?
6•) Why do we dream?7 Why is there stuff?
8•) Are there other universes?

Answers

Normal matter, 'dark matter,' and 'dark energy' are three sorts of substances hypothesized to exist in the Universe. The atoms that make up stars, planets, humans, and every other observable thing in the Universe make up normal matter.Under the blanket of hydrogen, rudimentary organic molecules began to form after things calmed down. Some scientists believe that these molecules eventually merged to become RNA, a molecular actor long credited with bringing life to the surface. In other words, virtually as soon as our planet was born, the stage was set for life to arise.The answer is indefinitely accurate. There is a possibility of life being out there but there is also a chance of us being alone. There is no concrete answer.Our amount of self-awareness is a fascinating aspect of being human. Our ability to be aware, that is, our awareness of basic sensory inputs, is even more vital. In layman's terms, we can reflect on our sentiments and judgments, which triggers an emotional response (unless you're a psychopath).Sentience, or knowledge of internal and outward existence, is the most basic form of consciousness.One popular view concerning the purpose of dreams is that they aid in the storage of key memories and lessons learnt, the elimination of unimportant memories, and the sorting of complex thoughts and feelings. Sleep, according to research, aids memory storage.N/A : define stuffThere is a multiverse, not just one universe. Leading scientists have spoken about a super-Copernican revolution in Scientific American articles and books like Brian Greene's The Hidden Reality.

stardust particles, big collisions and random occurrences, def not, awareness and ability to be different from others around you, we dream because our brain processes the things we’ve seen during our sleep, other universes do indeed exist

Balance and classify this reaction:
C6H6 +02 →CO2 +H₂O

Answers

This is a combustion reaction.
2C6H6 + 9O2➡️ 6CO2 + 6H2O

3 things to say when your girlfriend is sad?

Answers

Answer:

don't be sad you have a nice peach

babe you got that wap

don't be sad go get a tattoo

Answer:

Netflix and chill | do you need d!c rn ? | spoil her

Explanation:

Can someone help me with this?

Answers

1. F

2. E

3. G

4. A

5. C

6. D

7. B

how many moles are represented in 11.5 grams of sodium?

Answers

Answer:

In 11.5 g of sodium, there are 0.5 moles.

Explanation:

How is a lithium atom (Li) different from a lithium ion (Li+)?

Answers

lithium atom has 3 protons and 3 electrons
Lithium ion has 3 protons and 2 electrons

lithium atom has 3 protons and 3 electrons

Lithium ion has 3 protons and 2 electrons

Copper metal (cu) reacts with silver nitrate (agno3) in aqueous solution to form ag and cu(no3)2. the balanced chemical equation is shown below. cu 2agno3 right arrow. cu(no3)2 2ag the molar mass of cu is 63.5 g/mol. the molar mass of ag is 107.9 g/mol. what mass, in grams, of ag is produced from a reaction of 31.75 g of cu? 26.95 grams 107.9 grams 215.91 grams 431.82 grams

Answers

The mass of produced silver from the reaction is 107.9 grams.

How we calculate mass from moles?

Mass of any substance will be calulated by using the moles of that substance as:

n = W/M, where

W = required mass

M = molar mass

Givem chemical reaction is:
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag

Moles of 31.75g of Cu = 31.75g / 63.5g/mol = 0.5 mole

From the stoichiometry of the reaction, it is clear that:

1 mole of Cu = produced 2 moles of Ag

0.5 mole of Cu = produced 2×0.5=1 mole of Ag

Now we calculate the mass of Ag from given moles as:

W = 1mol × 107.9g/mol = 107.9g

Hence correct option is (2).

To know more about moles, visit the below link:

https://brainly.com/question/1034638

A car with a mass of 900 kg accelerates at 45 m/s 2 squared. What is the force acting on the car?

Answers

Answer:

mass (m) = 900 kg, acceleration (a) = 32 m/s^2. using f=m*a, f = 900 * 32 = 28 800 newtons. power (watts)= (f * s)/t say accelerating for 1 second from rest, s= (a*t^2)/2 = 16 meters.

If the molar mass of zinc is 65.39 g/mol. you have a 65.2g piece of zinc. how many moles of zinc are present?

Answers

Answer:

By dividing the two, we can determine the mol. And I have also inserteed the formula below

Explanation:

Moles of zinc present in the sample that have a mass of 65.2 g are 0.997 moles.

What are moles?

Moles are used to calculate the amount of substance to measure the small entity. It is calculated as:

[tex]\rm moles = \rm \dfrac{mass}{molar\; mass}[/tex]

Given,

Molar mass of zinc = 65.39 g/mol

Mass of zinc = 65.2 g

Moles are calculated as:

65.2/65.39 = 0.997 moles

Therefore, 0.997 moles of zinc are present.

Learn more about moles here:

https://brainly.com/question/21184222

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Jon is riding his bicycle around town. Which part of his ride shows the result of balanced forces? A. when he rides at a constant speed up a hill B. when he speeds up going down a hill C. when he rides at a constant speed while turning D. when he slows down on a level sidewalk

Answers

Answer:

d. when he slows down on a level sidewalk

Explanation:

that's a balanced force.

What is the last step in the process of getting a bill passed into law under normal circumstances

Answers

The anser is by making the bill have tall the things that a normal bill has. the invisiable line in the middle. the invisible ben franklin and the 50

According to Reference Table I, which reaction has a heat of reaction equal
to -283 kJ/mole at 25°C and I atmosphere?
A) C(s) + O2(g) + CO2(g)
B) CO(g) + O2(g) + CO2(g)
C) N2 +102 + NH3(g)
D) 20 + 3H2 → CzH6

Answers

The answer would be B)

If Earth's mass doubled
without changing its size,
your weight would

Answers

Answer:

Answer: It will double our mass too .

Explanation: Because the gravitational force will be more and it will attract us more towards its surface which will result to more weight gain .

Explanation:

mark as brainiest

What is the speed of light in a vacuum? What would happen to this speed as it enters a different medium?

Answers

Answer:

the speed and wavelength of light are reduced , although the frequency remains unaltered.

The speed of light on the vacuum is equal to 3 ×10⁸m/s. The speed of light changes as it enters a different medium due to refraction.

What is refraction?

Refraction of light can be described as the redirection of a light ray traveling from one optical medium to another optical medium. The redirection is caused by a change in speed with a change in the medium. Refraction of light can be described as an observed phenomenon, but sound waves and water also experience refraction.

Refraction follows Snell's law, which can be described as the ratio of the sines of the angle of incidence and angle of refraction should be equal to the ratio of the refractive indices of the two different mediums.

When light travels from a less dense to a denser medium, then the refracted ray bends towards the normal. The angle of incidence of the light ray will be greater than the angle of refraction.

If a light ray travels from a denser to a rarer medium, then it will bend away from the normal and the angle of incidence will be less than the angle of refraction.

Learn more about refraction, here:

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How many grams are in 7.50 moles of Hg?

Answers

the answer is 0.03738970038386775

Answer:

0.03738970038

Explanation:

7.50 x 0.0049852933845157 = 0.03738970038

The bond line formula,
represents the molecular formula

C₂ H18
C₂H15

Answers

yes this is the right question

When food is exposed to air, it can lose electrons. This loss of electrons
creates reactive molecules that work to destroy the chemical bonds in the
food, causing it to spoil. What are these reactive molecules called? A. Hydrogen molecules
B. Free radicals
C. Oxygen molecules
D. Spoiling molecules

Answers

It is Free radicals

Answer:

Its Free Radicals

Explanation:

You're Welcome

Someone please answer quick.

How many molecules are in 5.5 mol of a ZnCL2 sample

Answers

Answer:

The answer is 136.286.

mr cleann

Which example is an endothermic process?

A.) thawing frozen shrimp
B.) mixing strong hydrochloric acid and strong ammonium hydroxide
C.) rusting a nail in water
D.) dissolving acetic acid in water

Answers

An example of an endothermic process is the thawing frozen shrimp.

What is an endothermic reaction?

An endothermic reaction is one in which energy is taken in as the reaction progresses. Energy is required fro the reaction to progress. In an endothermic reaction, the energy of the products is greater than the energy of the reactants.

In the question, an example of an endothermic process is the thawing frozen shrimp.

Learn more about endothermic reaction: https://brainly.com/question/16692219

WILL GIVE BRAINLIEST. IF YOU DO LEAVE AN ANSWER, PLEASE EXPLAIN.

Answers

Anwser: C

Explanation: I have had this question on a quiz before so I know it I got 100 on the quiz

Answer:

it should be C

Explanation:

the top guy is right

How does the titration curve of a diprotic acid differ from that of a monoprotic acid?.

Answers

We have that how the titration curve of a diprotic acid differs from that of a monoprotic acid is that monoprotic acid will only have 1 equivalent point, while the diprotic acid will have 2 equivalent points.

What is differnce betwwen monoprotic acid and diprotic acid?

Generally, the equation for the monoprotic acid is mathematically given as

HA>>><<H+ + A-

While

the equation for the diprotic acid is

H2 A>>><<H+ + HA-

HA- >>><<H+ + A2-

In conclusion, The monoprotic acid will only have 1 equivalent point, while the diprotic acid will have 2 equivalent points

Answers

Answer:

False

Explanation:

from gas such as vaporization

Other Questions

Exercise 4-5 Assigning Overhead to Products in ABC [LO4-2, LO4-3]Sultan Company uses an activity-based costing system.At the beginning of the year, the company made the following estimates of cost and activity for its five activity cost pools:Activity Cost Pool Activity Measure ExpectedOverhead Cost Expected ActivityLabor-related Direct labor-hours $ 156,000 26,000 DLHsPurchase orders Number of orders $ 11,000 220 ordersParts management Number of part types $ 80,000 100 part typesBoard etching Number of boards $ 90,000 2,000 boardsGeneral factory Machine-hours $ 180,000 20,000 MHsRequired:1. Compute the activity rate for each of the activity cost pools.2. The expected activity for the year was distributed among the companys four products as follows:Expected ActivityActivity Cost Pool Product A Product B Product C Product DLabor-related (DLHs) 6,000 11,000 4,000 5,000Purchase orders (orders) 60 30 40 90Parts management (part types) 30 15 40 15Board etching (boards) 500 900 600 0General factory (MHs) 3,000 8,000 3,000 6,000Using the ABC data, determine the total amount of overhead cost assigned to each product. Given the function g(a) =4a -3. Solve for g(-2) 1: What does the word tarry in this phrase mean? But the little yellow bird did not tarry..."A: ProcrastinateB: RestC: RushD: Wait The lengths of the red drum species of fish have an approximately Normal distribution, with a mean length of 24 inches and a standard deviation of 1.4 inches. What proportion of red drum fish are between 22 and 23.5 inches in length? "Maya is making a flyer for her pet-sitting business to post on her social media account. She finds a cool pet store logo and uses part of it inthe flyer." Is this fair use? Be prepared to discuss your answer. What is a circuit? How do switches and different circuit arrangements affect how electricity flows through the circuit? The American system of democracy would be in serious trouble without ______. a. print media b. a monopoly on news media c. the reporting of skilled journalists d. media aggregators Jack and Jill each planted flowers in their garden. Jack spent $41 on 4 daylilies and 7 roses. Jill spent $81 on 12 daylilies and 7 roses. Read the excerpt from Frida Kahlo by Hedda Garza. Kahlo brusquely informed Rivera that she wanted him to tell her the unvarnished truth about her work. If she could not earn her living as an artist, she announced, she would take up some other profession to help her parents. "I want you to tell me if I am a good enough artist to make it worthwhile to go on." Why would the author include this event in the biography? It shows that Kahlo was ready to quit and live with her parents. It describes the beginning of Kahlo's relationship with Diego Rivera. It shows that Rivera was not kind to Frida Kahlo. It describes Frida Kahlo's feelings about her artwork . Please answer in Chinese. Four bricks of length l, identical and uniform, are stacked on top of one another (the figure) in such a way that part of each extends beyond the one beneath. Find, in terms of l, the maximum values of (a) a1, (b) a2, (c) a3, (d) a4, and (e) h, such that the stack is in equilibrium A population has a mean of 84 and a standard deviation of 12. A sample of 36 observations will be taken. The probability that the sample mean will be between 80. 54 and 88. 9 is northern renaissance artists and Early Italian Renaissance artists approached naturalism the same way? Which data set does this stem-and-leaf plot represent?15, 24, 28, 36, 45, 75, 76, 77, 80, 8615, 15, 15, 15, 75, 76, 77, 80, 24, 28, 36, 45, 75, 865, 5, 5, 5, 4, 8, 6, 5, 5, 5, 6, 7, 0, 615,555, 248, 36, 45, 75,567, 806 Solve 5ax +6ax =7ax + 8 for x. Assume a 0 What is the slope of a line perpendicular to the line whose equation is 2x-5y=-40 Conjugate the below verb tothe Preterite "tu" form:Creer Which planet moves the fastest and which planet moves slowest? how can you apply the process of solving percentiles of a grouped data in a purposeful way? what is Archivo general de Nacion?