Help me please!!!!!!!!

Help Me Please!!!!!!!!

Answers

Answer 1

Answer:

4.00

Explanation:


Related Questions

Substances that can carry electric current under some conditions but not under others are called semiconductors.

Answers

A semiconductor is a substance, usually a solid chemical element or compound, that can conduct electricity under some conditions but not others, making it a good medium for the control of electrical current. Silicon is a very common element -- for example, it is the main element in sand and quartz.

Substances formed as a result of a chemical reaction are calledImmersive Reader (1 Point) products reactants catalysts precipitates

Answers

Answer: substances formed as a result of chemical reaction are called PRODUCTS.

Explanation:

A chemical reaction can be defined as a reaction in which substances known as the REACTANTS makes or breaks it's bonds to form another substance usually referred to as the PRODUCT. Usually, a new substance which is referred to as the product that is formed is different from the original reacting substances. Some of the characteristics of a chemical reaction include:

--> colour change,

--> heat production,

--> precipitation

The rate at which these chemical reaction occurs depends on some factors such as pressure, temperature and concentration of the reactants

There are different examples of chemical reaction which includes:

--> Rusting of iron: this occurs when iron and oxygen combines to form a mixture of iron oxides, which is the product of the chemical reaction.

--> The burning of magnesium in air: in this Chemical reaction, magnesium reacts with oxygen to form magnesium oxide which is the product of the chemical reaction.

2Mg(s) + O2(g) △→ 2MgO(s)

--> Production of table salt: this is formed from the reaction of sodium and chloride to give sodium chloride as the product of the chemical reaction.

Therefore in a chemical reaction, no atom is destroyed or created but a new PRODUCT is formed from reactants.

A baby chicken has feathers on its feet that are similar to that of its parents. Where are the instructions stored that provide information for a baby chicken’s feathery feet? A) In cytoplasm inside cells B) On genes within chromosomes C) On the cell membrane Eliminate D) In the mitochondria

Answers

Answer:

B) On genes within chromosomes

Explanation:

Answer:

B) On genes within chromosomes

How many moles are in 8.0 gram sample of C3H4

Answers

Answer:

0.18 mol C₃H₈

Explanation:

to find the mole you have to convert the 8.0grams into moles.

8.0g C₃H₈        1 mol C₃H₈

       1               44.0g C₃H₈

*Pretend that those are a table*

I got 44.0g because Carbon is 12.0g you multiply that 3 times because it has a subscript of 3 and do the same for Hydrogen (1.0 x 8) then add those which would be 44.0g.

1 mol of C₃H₈ = 44.0g C₃H₈

now just mulitply and divide them.

8.0g x 1 = 8.0

1 x 44.0g = 44.0

8.0/44.0 = 0.18 mol C₃H₈

Name two metals which will not liberate hydrogen from
dilute tetraoxosulphate(vi) acid.​

Answers

Copper (Cu) and silver (Ag) would not liberate hydrogen because they are less reactive than hydrogen since their standard reduction potential is higher.

To solve such this we must know the concept of double displacement reaction. Therefore, copper (Cu) and silver (Ag) would not liberate hydrogen from dilute tetraoxosulphate(vi) acid.

What is chemical reaction?

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

Copper (Cu) and silver (Ag) would not liberate hydrogen because they are less reactive than hydrogen since their standard reduction potential is higher.

Therefore, copper (Cu) and silver (Ag) would not liberate hydrogen from

dilute tetraoxosulphate(vi) acid.

Learn more about the chemical reactions, here:

https://brainly.com/question/3461108

#SPJ2

B) A company president would like to offer a 4.00 L cylinder containing 500 g of chlorine in the new catalog. The cylinders you have on hand have a rupture pressure of 40 atm. Use both the ideal gas law and the van der Waals equation to calculate the pressure in a cylinder at 25°C. Given a = 6.58 L2 atm mol-2 and b = 0.056 L mol-2, Cl =35.5. (5 marks)

Answers

Answer:

43.1atm is the pressure using gas law and 27.2atm using Van der Waals Law.

Explanation:

Ideal gas law is:

PV = nRT

Where P is pressure in atm

V is volume = 4.00L

n are moles of the gas (For chlorine Molar Mass: 70.90g/mol):

500g * (1mol / 70.90g) = 7.052 moles

R is gas constant = 0.082atmL/molK

T is absolute temperature = 25°C + 273 = 298K

To solve the pressure, P:

P = nRT/V

P = 7.052mol*0.082atmL/molK*298K / 4.00L

P = 43.1atm is the pressure using gas law.

Van der Waals equation is:

[tex]P + a(\frac{n}{V})^2 * (V-nb) = nRT[/tex]

Where a is 6.58L²atm*mol⁻²

b = 0.056Lmol⁻²

Solving for pressure:

[tex]P + a(\frac{n}{V})^2 = \frac{nRT}{(V-nb)}[/tex]

[tex]P = \frac{nRT}{(V-nb)}-a(\frac{n}{V})^2[/tex]

[tex]P = \frac{7.052mol*0.082atmL/molK*298K}{(4.00L-7.052mol*0.056L*mol)}-6.58L^2mol^{-2}(\frac{7.052mol}{4.00L})^2[/tex]

P = 172.323 / 3.6051 - 20.4866

P = 27.2atm using Van der Waals Law

what do you call the materials in which electricity pass easily?
a. insulator
b. conductors
c. non conductors
d. metallic​

Answers

Answer:

Conductors

Explanation:

WORTH 20 POINTS!! Need answer ASAP

Answers

Answer:

i cant see the image im good at chem if you can write it down in the comments ill answer it

Explanation:

How many grams equal 4.3 x 1024 atoms of oxygen (O2)?

Answers

Answer:

https://socratic.org/questions/how-many-grams-are-in-1-25-x-10-22-atoms-of-oxygen#403337

Explanation:

How many hydrogen atoms are present in an alkyne with 5 carbon atoms?

Answers

Answer:

cuatro

Explanation:

ino->4

Alkynes are triple bonded hydrocarbons. There are 7 hydrogen in an alkyne with 5 carbon atoms. This compound can be named as pentyne.

What are alkynes?

Alkynes are hydrocarbons with one triple bond between two carbon atoms. alkynes are unsaturated compounds. Alkynes are named with the suffix 'yne' like ethyne, propyne etc..

There are three types of hydrocarbons namely, alkanes, alkenes and alkynes. Alkanes are saturated hydrocarbon having single bond between carbon atoms. Eg. methane , ethane etc all having suffix of 'ane'. Alkenes are unsaturated hydrocarbons with double bond between two or more carbon atoms.

Alkenes are named with the suffix 'ene'. Hence, the names become ethene, propene etc. The prefix for the names of hydrocarbons is based on the number of carbons. meth for 2, eth for 2 prop for 3, but for 4 and pent for 5 and so on.

The valency of carbon is 4 and it will bind to four other atoms. When it forms triple bond with a carbon it can bind to one hydrogen only. If it is a middle carbon then it dont have a hydrogen since either side will be carbons.

Thus for a 5 carbon alkyne, there will be total 7 hydrogens and the compound is pentyne.

To find more on pentyne, refer here:

https://brainly.com/question/15022928

#SPJ6

Help me get it right and no links

Answers

Answer:

i think the second answer " fish migration might be prevented" might possibly be your answer

Which field of study examines homologous structures?
A) Genetics
B) Embryology
C) Comparative Anatomy
D) Physics

Answers

The answer should be B

HELPPPPPP!!!! ILL MARK YOU BRAINLIEST!

A cube has a mass of 100g and each side is 5cm. What is its density?

Answers

The answer is 20 because density = 100g/5cm

Males have glands called testes that release the hormone known as _______________. a estrogen b epinephrine c testosterone d toblerone

Answers

Answer:

testosterone is released from their testes!

A bowling ball is let go from a height of 30 cm. What is the velocity of the
ball just before it hits the ground?
Select one:
о
0.30 m/s.
О
17 m/s.
O
24 m/s
a
1.3 m/s

Answers

Answer:

The answer is 0.30 m/s

Explanation:

i search it on

a force of attraction between objects that is due to their masses and distance between objects
a. gravity
b. weight
c. mass

Answers

Answer:

the answer is gravity

hope this helps

Mg (s) + 2 HCl (aq) --> MgCl2 (aq) + H2 (g)

Use the balanced chemical equation above to determine the number of moles of hydrogen gas that would be produced if 3.50 moles of solid magnesium reacted. please show all work and record your answer with proper units and significant figures.
Pls help

Answers

Answer:

2Mg + 4HCl (aq) --> 2 MgCl2 (aq) + H2

Explanation:

balanced...

When precipitation falls in summer, sometimes wind pushes it back up into freezing temperatures before falling again. What will most likely occur when this happens?

A.
hail will fall

B.
rain will fall

C.
sleet will fall

D.
snow will fall.

Answers

Answer:

A

Explanation:

hail will fall push it back up making it bigger comes back down

he diagram shows a device that uses radio waves.

Two radio towers. The towers are equal distance apart with an arrow between them. The left tower is labeled X. The right tower is labeled Y. The arrow is pointing from Tower X to Tower Y.
What is the role of the part in the diagram labeled Y?

modulate, amplify, and send out waves
capture, amplify, and demodulate waves
change the amplitude and frequency of waves
change the pulse and phase of waves

Answers

Answer:

b

Explanation:

What is a group of words called that contains elther a subject or a verb, but not both?

Answers

Answer:

Phrase

Explanation:

Phrases don't have both, but clauses do.

If an organism ingests 950.0 g of glucose (C6H12O6) in its lifetime, how many grams of carbon dioxide (CO2) will be released? (molar mass C6H12O6 = 180.156 g/mol) (molar mass CO2 = 44.009 g/mol)

Answers

Answer:

1392. g CO2

Explanation:

plz help me get it right and no links

Answers

Answer:

get what right?

Answer:

You didn't post the question.

Explanation:

Edit your question and I'll try to help you.

Hope this helped? Lol.

Help please!!!!!!!!!! Both questions!!!!

Answers

on the first one it’s diffusion.

on the second on its false.

Below is a chemical equation. Which of the following are identified by the blue arrows?

Captionless Image
atomic numbers
coefficients
products
subscripts

Answers

it’s the subscripts. I know this for sure

Se disuelven 10 g de acido carbónico H2CO3 en 150 g de agua. Determina la concentración % m/m de esa disolución?

Answers

The question is: 10 g of carbonic acid H2CO3 are dissolved in 150 g of water. Determine the% m / m concentration of that solution?

Answer: The% m / m concentration of that solution is 6.66%.

Explanation:

Given: Mass of solute = 10 g

Mass of solvent = 150 g

Formula used to calculate the %m/m is as follows.

[tex]Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100[/tex]

Substitute the values into above formula as follows.

[tex]Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100\\= \frac{10 g}{150 g} \times 100\\= 6.66%[/tex]

Thus, we can conclude that the% m / m concentration of that solution is 6.66%.

A supersaturated solution is said to contain ​

Answers

Explanation:

A solution that contains more than the maximum amount of solute that is capable of being dissolved at a given temperature.

I hope it helps

Answer:

A supersaturated solution is said to contain more solute than it can dissolve at that given temperature.

Which process is exothermic?
a) the vaporization of water b) the freezing of water c)the sublimation of dry ice d ) the boiling of liquid nitrogen

Answers

Answer:

Freezing of water

Explanation:

When water becomes a solid it releases heat into its surroundings (warming it up).

How much concentrated 15.54 M sulfuric acid is need to prepare 6.1 mL of a 2.28 M solution?

Answers

Answer:

0.895 mL

Explanation:

Using the formula;

C1V1 = C2V2

Where;

C1 = initial concentration (M)

C2 = final concentration (M)

V1 = initial volume (mL)

V2 = final volume (mL)

According to the information provided in this question;

C1 = 15.54M

V1 = ?

C2 = 2.28M

V2 = 6.1 mL

Using C1V1 = C2V2

V1 = C2V2 ÷ C1

V1 = (2.28 × 6.1) ÷ 15.54

V1 = 13.908 ÷ 15.54

V1 = 0.895 mL

During a phase change, such as melting or boiling, the kinetic energy __. Highlight correct answer

Answers

Answer: During a phase change, such as melting or boiling, the kinetic energy increases.

Explanation:

Kinetic energy is the energy obtained by the molecules of a substance due to their motion.

When phase change such as melting or boiling takes place then it means heat is absorbed by the substance. As a result, their molecules more even more rapidly from one place to another due to which more number of collisions take place.

Hence, a change in phase of substance occurs as kinetic energy increases in melting or boiling process.

Thus, we can conclude that during a phase change, such as melting or boiling, the kinetic energy increases.

I really need help with this chemistry assignment multiple choice

Answers

Answer:

b option to is correct and answer bro

Other Questions
Difference in slums and celebrity homes lead to disparity in wealth by: *the concentration of wealth to certain peopleconcentration of resources and opportunities to certain section of the societyproviding good hygiene conditions in slums Tickets for a baseball game sell for $3. One hundred fifty were sold in advance. The stands has 400 seats. Let A be the total amount of ticket sales, in dollars, including the tickets sold at the door. Which statement best decribes A?a. A 1,200b. 450 A 1,200c. A 450d. A 900 I NEED HELP WITH THIS EQUATION Rewrite the sentences replacing the words in italics with an object pronoun - make any changes necessary - faites attention l'ordre des mots. Ils ne vous ont pas vendu votre livre? Which set of polar coordinates describes the same location as therectangular coordinates (3,0)?A. (-3,270)B. (3,0)C. (3,180)D. (3,90) what is the formula to find angle A? please help 5. What is the range of the function y = 2x 4? Find the mode of the following set of data:5, 8, 2, 5, 2,5A 5B) 2C 2 and 5 The duration between the emission of the sound from the echo reception is: t - 1.5 s. the distance between the observer and the sound receiver knowing that the speed of sound in the air is worthV - 340 m/s is: jessie emily schofield poem and on aging comparison Susan has 3 pairs of shorts, 5 shirts, and 2 pairs of shoes to take to camp. If she wears a pair of shorts, a shirt and pair of shoes each day, how many different outfit combinations does Susan have to choose from? Solve each equation. Show or explain your reasoning.3x 5 = 164(y 2) = 12 The Kelly's are having a dinner at a local restaurant. Mr. Kelly wants to give the server is 15% gratuity, and the sales tax is 6.5%. He will use the amount of the bill to find each additional amount. By what percent does the cost of the meal increase with tax and gratuity? Whats your highest grade for subject in school? mine is art lol, then science. What type of figurative language is used in the following quotefrom Mockingjay?"In his hands, I am again a mockingjay."simileBmetaphorhyperbole Weight is opposed by what force?a)Liftb)All of the abovec)Dragd)Thrust From which locations in the empire did Rome import grain to feed its citizens according to the map? Plz, help worth 20 points :) May God bless you, have a nice day, bye! please answer this through here. People are giving me links that i cant open Which 2 of the Earth's regions contain the most carbon? What was the basic idea behind much of the domestic legation de A that the Federal Government should help big bus B. that the Federal Government should assume the that the Federal Government should own and operate that the Federal Government should require local.com