Chemistry High School

help pls pls pls I really need this answer

Answers

Answer 1

Answer:

I never did this but i think its d 37.5٪ lmk if i got it right pls and srry if i didnt

Related Questions

Food chains always begin with what type of organism? Why?

Answers

Food chains always begin with the sun but the organism that it starts with is a plant typically grass. Plants are fuel for consumers

In the context of this graph, what do the slope and y-intercept mean?

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Answer: The slope and y-intercept values indicate characteristics of the relationship between the two variables x and y. The slope indicates the rate of change in y per unit change in x. The y-intercept indicates the y-value when the x-value is 0.

CH4+202>CO2+2H2O ; How many grams of water are produced from 30.0g of oxygen? PLS HELP AND SHOW WORK!!!!

Answers

I was taught how to do it this way and trust me it is way easier than doing the stuff with fractions. I’ll upload a photo on how to do it

Identify the pair in whic 1 the formula does not match the name
sulfite, SO32
nitrite, NO3-
hydroxide, OB
dichromate, C 20-2

Answers

Answer:

hydroxide is the one because it is the one HAHAH

Answer:

hydroxide, OB

Explanation:

hydroxide,OB

what is the Ka of a 0.0592 M solution of hydrofluoric acid (HF) with a pH of 6.90

Answers

Answer:

2.7*10^-13

coefficient= 2.7

exponent= -13

Explanation:

Answer: 2.7 x 10^-13

Explanation:

*Urgent*
A balloon has a volume of 31.8 L at a temperature of 46 degrees C. What is the new temperature
of the balloon in degrees C if the volume is changed to 49.2 liters?
Round answers to 0.1 decimals

Answers

Answer:

The new volume will be

0.7 L

Explanation:

This is an illustration of Charles' law, some of the time called the temperature-volume law. It expresses that the volume of a gas is straightforwardly corresponding to the Kelvin temperature, while pressing factor and sum are held steady. The condition is V 1 T 1 = V 2 T 2 , where V is volume and T is temperature in Kelvins. Known V 1 = 0.5 L T 1 = 20 ∘ C + 273.15 = 293 K T 2 = 150 ∘ C + 273.15 = 423 K Obscure V 2 Arrangement Revise the condition to confine V 2 . Substitute the known qualities into the condition and address. V 2 = V 1 T 2 T 1 V 2 = ( 0.5 L × 423 K ) 293 K = 0.7 L adjusted to one huge figure

What important ingredients do you need to create a fertilized egg

Answers

Answer:

In the 1970s, Epel and other researchers showed that calcium is the essential factor that sparks development in eggs. As calcium levels rise, metabolic changes occur that cause the egg to divide and form into an embryo.

Explanation:

Neon in a piston is compressed to a volume of 14L its original volume was 22 L at 11.2 atm find the new pressure in atm

Answers

I love chem!!! Hopefully I got it right for u I got

In the calculator: 7.127272727

But if u need it in sig figs: 7.1atm

The reason Senators are in office for 6 years is....(pick one of the following)

1) To separate Senators from the whims of the
general public.

2) to save money in elections

3) Because Senators are
required to be older
than representatives

Answers

The answer should be 1 because they need senators to be away from the political pressure from the general public but it makes more sense than the rest

the movement of carbon between the atmosphere, land, and ocean is called what?

Answers

The answer is the carbon cycle

A box slides with an initial speed of 4.0 towards a spring on a frictionless horizontal surface. When the box
S
N
hits a spring with spring constant k = 150 the spring compresses by 0.30 m.
m
m
M
What is the mass of the box?

Answers

Answer: .84kg

Explanation:

Khan academy

A box slides with an initial speed of 4.0 kg m/s towards a spring on a frictionless horizontal surface. When the box hits a spring with spring constant k = 150 N/m, the spring compresses by 0.30 m.

What is the mass of the box?

Answer: 0.54 kg

WILL MARK BRAINLIEST

Answers

Answer:

B) inertia

Explanation:

Sorry if wrong

B. Inertia

—

A- free fall is when an item falls freely

B- when an item remains still, unless it is forced

C- momentum is the quantity of motion of a making body

D- maximum velocity of an object

Hope this helps

PLEASE HELP ASAP NO LINKS PLEASE
What is the force that keeps the planets in perfect orbit around the sun?
A) Velocity
B) Gravity
C) Centrifugal Force
D) Magnetism

Answers

Answer:

gravity

Explanation:

Gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies.

Hope this helped!!!

Who elects or appoints Representative and Senators?
(Marking brainliest for the quickest correct answer!)

1) the president

2) the electoral college

3) The people

Answers

Answer:

3) The People

Explanation:

Members Of Congress In Both Houses ( Democrats And Republicans ) Are Elected By Direct Popular Vote. Senators Are Elected Via A Statewide Vote ( The People All Around The World ) And Representatives Are Elected By Voters In Each Congressional District.

how does the water cycle sustains life
plz help! !!

Answers

Water is constantly being cycled between the atmosphere, the ocean and the land. This cycling is a very important process that helps sustain life on Earth. When the sun heats water, the water evaporates or changes to water vapor. Water vapor rises and condenses or changes back into liquid water droplets.

A gas is collected at 30 Celsius and has a pressure of 200 kPa. What pressure would it exert if the temperature changed to 40 Celsius?

Answers

Answer:

[tex]206.6\ \text{kPa}[/tex]

Explanation:

[tex]P_1[/tex] = Initial pressure = 200 kPa

[tex]P_2[/tex] = Final pressure

[tex]T_1[/tex] = Initial temperature = [tex]30^{\circ}\text{C}[/tex]

[tex]T_2[/tex] = Final temperature = [tex]40^{\circ}\text{C}[/tex]

We have the relation

[tex]\dfrac{P_2}{P_1}=\dfrac{T_2}{T_1}\\\Rightarrow P_2=\dfrac{T_2}{T_1}P_1\\\Rightarrow P_2=\dfrac{40+273.15}{30+273.15}\times 200\\\Rightarrow P_2=206.6\ \text{kPa}[/tex]

The pressure that would be exerted after the temperature change is [tex]206.6\ \text{kPa}[/tex].

the charge of the atom is

Answers

Answer:

the charge of an atom is zero.

Explanation:

i hope this is what you were asking for.

acrostic words or phrases that describe street dance

Answers

Poppin? dance??? LOL

Anyone know the answer to this?

Answers

the answer is 2 i think

Which ionization process requires the most energy? which ionization process requires the most energy? f(g) → f +(g) + e- o(g) → o +(g) + e- f +(g) → f 2+(g) + e- o +(g) → o 2+(g) + e-?

Answers

I think it’s W+(g) → W2+(g) + e-

MRI machines use extremely strong magnetic fields. These fields must be adjustable to produce high-quality images. What might these
machines use to generate such a field?
A
electromagnets
B
permanent magnets
C
induced current

Answers

..................................
A

How many molecules are in 6.20 moles of CaCO3?

Answers

1 mole is equal to 1 moles CaCO3, or 100.0869 grams.

What is mole?

A mole is just a measuring scale. In reality, it's one of the International System of Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created.

The mole is a SI unit that is used to quantify any quantity of a substance. The word "mole" is shortened to "mol".

A mole consists of precisely 6.022140761023 particles. The "particles" could be anything, from tiny things like electrons or atoms to enormous things like stars or elephants.

Therefore, 1 mole is equal to 1 moles CaCO3, or 100.0869 grams.

To learn more about moles, refer to the link:

https://brainly.com/question/26416088

#SPJ2

SOMEONE HELP PLS! I missed a day and I need help rn

Answers

Answer:

Explanation:

Which on is right O& Mg?
OMG
MgO
Mg2O2
Mg+2O-2

Answers

Answer:

MgO

is the correct answer

hope it helps

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How many atoms would be contained in 454 grams of iron?

Answers

Answer:

4.90 x 10 24 atoms

Explanation:

the 24 is the exponent for the 10

Can y’all help me with this

Answers

Add sugar or water to the lemonade if it’s too sweet or if it’s not sweet

Name the following compound: C2Cl6

Answers

yessirrrrrrrrrrrrttttrrrr

Question of the day

Seeds obtain their energy (food) directly from the soil as soon as they are planted.

True or False?

Answers

Answer:

false

Explanation:

it gets nourishment from the storage tissues in the seeds, when it develops into a young plant with roots, then it takes nutrients from the soil

False

When a seed is planted, it gets nourishment from the storage tissues in the seeds. The storage tissues could be in the cotyledon, peristem or endosperm. The storage tissue contain carbohydrates proteins,and fats content. When the embryo develops into a young plant with young roots, the plant then draws nutrients from the soil.

1) A 45.7 g sample of glass was brought to thermal equilibrium with boiling water and then transferred to 250.0 g of water that was at 22.5 °C. This combination reached thermal equilibrium at 24.2 °C. What is the specific heat capacity of glass?

2) What mass of silver at 100.0 °C, when added to 150.0 g of water at 21.0 °C, would raise the water’s temperature to 24.0 °C ?

3) The molar heat of fusion of H2O is 6.1 kJ/mole. What amount of energy would be needed to melt 376 g of ice at 0.0 °C?

Answers

2) What mass of silver at 100.0 °C, when added to 150.0 g of water at 21.0 °C, would raise the water’s temperature to 24.0 °C ?

3) The molar heat of fusion of H2O is 6.1 kJ/mole. What amount of energy would be needed to melt 376 g of ice at 0.0 °C?

What is the normality of a 2.0 M NaOH solution?

Answers

Answer:

Normality= molarityX total POSITIVE oxidation number of solute Solvent=substance present in the greatest amount Solute= all other substances in the solution +1 (1 na+) is the total POSITIVE oxidation number of NaOH 2.0X1= 2.0 N=2.0

Explanation:

I had the same question on one of my assignments earlier

Other Questions

What is the first step to solve this equation:11 - 3x = 44Question 3 options:Add 3 to both sidesAdd 11 to both sidesSubtract 11 from both sidesDivide 3 on both sides. Please answer correctly! I will mark you Brainliest! Someone please help me Ill give out brainliest please dont answer if you dont know The China Company offers a trade-discount rate that is 4 times the complement of the trade-discount rate. If the list price is $58.75, what is the trade discount? What is the net price? I need help please anyone help???!!! PLEASE HELP !! ILL GIVE BRAINLIEST !! Factory Overhead Cost Variances The following data relate to factory overhead cost for the production of 8,000 computers: Actual: Variable factory overhead $101,750 Fixed factory overhead 180,000 Standard: 8,000 hrs. at $31 248,000 If productive capacity of 100% was 10,000 hours and the factory overhead cost budgeted at the level of 8,000 standard hours was $284,000, determine the variable factory overhead controllable variance, fixed factory overhead volume variance, and total factory overhead cost variance. The fixed factory overhead rate was $18 per hour. Enter a favorable variance as a negative amount, and an unfavorable variance as a positive amount. 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That Hans likes Melanie a lot Read the passage carefully and then answer the question.I have in my hand two publications; one is The Adventures of William Dodd the Factory Cripple and the other is entitled The Factory System - both books have gone forth to the public under the sanction of the noble Lord Ashley. I do not wish to go into the particulars of the character of this man, for it is not necessary to my case, but I can demonstrate, that his books and statements are wholly unworthy of credit. Dodd states that from the hardships he endured in a factory, he was "done up" at the age of thirty-two, whereas I can prove that he was treated with uniform kindness, which he repaid by gross immorality of conduct, and for which he was discharged from his employment.How does the speaker seem to feel about William Dodd?He feels that William Dodd is a liar who should be questioned.He feels that William Dodd is a good person who would never lie.He feels that William Dodd is a dangerous and unstable individual.He feels that William Dodd is a man who needs help from others. Write two paragraphs (6 sentences minimum per paragraph) on nature. Provide descriptive words for the natural world, its daily activity, and how it interacts with itself. Trees and wind. Waves and sand. Birds and other birds. Creatures and other creatures. The answer to this would be really greattt Plz help! No links plz HELPPPP PLSSSSPLSSS PLS I NEED HELL At the craft store, Janice bought a bag of green and yellow marbles. She received 14 green marbles and 11 yellow marbles. What percentage of the marbles were green? Liang Company began operations in Year 1. During its first two years, the company completed a number of transactions involving sales on credit, accounts receivable collections, and bad debts. These transactions are summarized as follows. Year 1 a. Sold $1,352,600 of merchandise (that had cost $976,400) on credit, terms n/30. b. Wrote off $20,100 of uncollectible accounts receivable. c. Received $674,300 cash in payment of accounts receivable. d. In adjusting the accounts on December 31, the company estimated that 2.80% of accounts receivable would be uncollectible. Year 2 a. Sold $1,552,800 of merchandise (that had cost $1,325,200) on credit, terms n/30. b. Wrote off $31,300 of uncollectible accounts receivable. c. 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A cylindrical-shaped Petri dish with a radius of 50 millimeters and a height of 15 millimeters. What is the area of the figure shown? 3 in. 10 in. 5 in. 10 in.Please I need help