Chemistry High School

please answer its due in 10 minutes teacher just assigned it 5 minutes ago

Answers

Answer 1

Answer:

please upload a clearer picture

Answer 2

Answer:

1 Rain falling down

2)Freezing

3)Melting 4)Adding or removing energy from matter causes a physical change as matter moves from ome place to the other5)5he

Related Questions

A chemical formula is shown below. How many total atoms are in 2 molecules of the chemical formula shown?

C6H12N2O

Answers

Answer: 42

Explanation: I took a quiz and had the same question.

What are the names of the two categories of living organisms?

Answers

Answer:

Prokaryotes (which are bacteria and archea)

Eukaryotes (which is plants, animals, protists and fungii)

What volume of O2 would be required to react with 4.6 grams of Na

Answers

Volume of O₂ = 1.12 L

Further explanation

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products

Reaction

4Na+O₂ ⇒ 2Na₂O

Ar Na = 23 g/mol

mol Na :

[tex]\tt mol=\dfrac{4.6}{23}=0.2[/tex]

mol O₂ :

[tex]\tt \dfrac{1}{4}\times 0.2=0.05[/tex]

Assume at STP (0 C, 1 atm), 22.4 L for 1 mol , then volume of O₂ :

[tex]\tt 0.05\times 22.4=1.12~L[/tex]

A car travels at 35.0 mi/hr. How far has it gone in 2455 seconds?

Answers

Answer:

The answer is 23.8 miles

Explanation:

The distance covered by an object given it's velocity and time taken can be found by using the formula

distance = velocity × time

From the question

velocity = 35.0 mi/hr

time = 2455 s = 0.68 hr

We have

distance = 35 × 0.68

We have the final answer as

23.8 miles

Hope this helps you

The hybrid orbitals of a molecule are shown in the figure.
These hybrid orbitals were most likely formed by mixing
one s orbital and one p orbital.
one s orbital and two p orbitals.
one s orbital and three p orbitals.
O two s orbitals and two p orbitals.

Answers

Answer:

One s orbital and One p orbital

Explanation:

All covalent compounds donot exist as giant aggregates. Why?

Answers

This is because of the attractive forces between the molecules with the absence of overall electric charge. Covalent compounds are usually gaseous molecules at room temperature and pressure.

How is the human body like a stone arch?

Answers

Answer:

It is like an arch because it bends horizontal just like we do and the legs of the arch support the stone like our feet and legs support the weight of us.

Explanation:

Which pair of elements will have the same number of valence numbers

A- lithium and barium
B- gallium and germanium
C- tellurium and polonium
D- iondine and xenon

Mark as brainlist :)

Answers

Your answer would be C.

Tellurium and Polonium have 6 valence electrons.

Which of the following is the conjugate acid of H2P04- ?
A. HAP04
O B. PO 3-
O C. HP04-2
O D. H3PO4

Answers

Answer:

phosphoric acid H3PO4

The conjugate acid of H₂PO⁴⁻ is H₃PO₄. Therefore, option D is correct.

A conjugate acid is a species that is formed when a base accepts a proton (H⁺). It is the species that is one proton (H⁺) more acidic than the original base.

The base is the species that can accept a proton (H⁺), and the conjugate acid is the species that is formed when the base accepts the proton. The conjugate acid has one additional proton compared to the base.

Conjugate acids play an important role in acid-base reactions as they are formed when bases accept protons, and they can donate protons in subsequent reactions to regenerate the original base.

Learn more about conjugate acids, here:

https://brainly.com/question/31229565

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The unit for force is kg m/s.
True Or false?

Answers

The unit for force kg m/s is true

Convert 49 lbs into grams

Answers

Answer:22226.026 gExplanation:

To get an approximate result, multiply the mass value by 454.

hope this help!

PLZ HELP WILL MAKE U BRAINLIEST! what is acceleration???

Answers

acceleration is the rate at which velocity changes

Answer: Acceleration is when something accels.

Or, in simple terms, when the velocity changes rapidly to a very quick speed.

Hope this answer helps you!

Best of Regards!

How does the atomic mass of the atom change when an electron is added or removed?

Answers

If you could magically make two neutrons in the nucleus of an atom disappear, the atomic number and the electrical charge of that atom would remain unchanged. Neutrons do not carry an electrical charge so adding or removing them from the nucleus does not change the electrical charge of the nucleus. It does, however, change the mass of the nucleus. Adding or removing neutrons from the nucleus are how isotopes are created.

Protons carry a positive electrical charge and they alone determine the charge of the nucleus. Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. So, adding or removing protons from the nucleus changes what element that atom is! For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium. (Actually, a few neutrons have to be added as well to make the new nucleus stable, but the end result is still helium.) Keep in mind that atoms, by definition, are electrically neutral and always contain the same number of protons and electrons.

What part of the atom is responsible for the behavior of the alpha particles?

Answers

Answer:

nucleus

Alpha particles are subatomic fragments consisting of two neutrons and two protons. Alpha radiation occurs when the nucleus of an atom becomes unstable (the ratio of neutrons to protons is too low) and alpha particles are emitted to restore balance.

Explanation:

Crystallisation is a separation technique used to separate____ solids from a liquid solvent.

Answers

Answer:

separate soluble solids from liquid

Explanation:

A in Chemistry

Crystallization is a separation technique used to separate solute solids from a liquid solvent.

What is Crystallization?

Crystallization is the process of disuniting or separating two substances or molecules that are mixed, and are of different forms of matter. Such as solid and liquid. The process separates mixtures by three processes. These processes are freezing, precipitation, and deposition.

It is the main process of separating solid from liquid. In this process, the solute came above the liquid in crystal form and this is called precipitation.

Freezing separates the substance that has a different freezing point. By deposition, the substance that is solid and called solute is deposited below the liquid in the container.

Thus, crystallization separates the solute solids from a liquid solvent.

To learn more about Crystallization, refer to the link:

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Which phrase describes a metamorphic rock?
formed from a volcano
was once buried underground
formed from evaporating water
contains minerals that have not changed

Answers

Answer:

C: was once buried underground

Explanation:

Hope this helps!

Answer:

The correct answer you are looking for is B i have got 100% on this test.

Explanation:

hop this helps! └(^o^)┘ ↖(^ω^)↗

A black hole is a
a. an object of zero volume and infinite density
b. an object from which nothing, not even light, can escape
c. an object that emits x rays as matter falls into it
d. an object that disappears from our universe
e. all of the above

Answers

Answer:

B. an object from which nothing, not even light, can escape

Explanation:

What mass of water freezes if 5.43 kJ oh heat are released in the process

Answers

Q= mass•specific heat•change temp. 5.43=m•4.184•(202-32) M=7.63grams

Answer:

16.3 g

Explanation:

got it right on ck

Calculate the entropy change when 4.31 g of H2 reacts with O2 according to the reaction

2 H2(g) + O2(g) → 2 H2O(l)

at 298 K and 1 atm pressure. The standard molar enthalpy of formation of H2O(l) at 298 K is −285.8 kJ/mol. The corresponding free energy of formation is −237.2 kJ/mol.

Answer in units of J/K.

Answers

Answer:

Explanation:

ΔG = Δ H - T ΔS

Given , ΔG = -237.2 kJ / mol

Δ H = - 285.8 kJ / mol

T = 298

Putting the values in the equation

-237.2 = - 285.8 - 298 x ΔS

ΔS = .163 kJ / mole K

moles of water formed = 4.31 / 2 = 2.155

entropy change required = 2.155 x .163 kJ / K

= 351.26 J / K .

Maria wants to determine which type of disinfectant kills the most bacteria.

Which of the following is the best way for Maria to determine this?
A.
Interview ten different people to determine which type of disinfectant they prefer.
B.
Put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate.
C.
Ask ten different companies that make disinfectants which type is best.
D.
Put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Answers

A I think thats what I would put

Can yall help me i suck at this and rlly need help

Answers

Answer:

Fireworks is exothermic

Endothermic is Cookies

Explanation:

Exothermic reactions transfer energy to the surroundings and the temperature of the surroundings increases. Endothermic reactions take in energy and the temperature of the surroundings decreases.

Hope this helps

What is the role of gravity in the solar system?

Answers

Answer:

Explanation:

Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth. ... Gravity creates stars and planets by pulling together the material from which they are made. Gravity not only pulls on mass but also on light.

Question 3 (4 points)
A dipole bond is formed when electrons are not shared equally in a covalent bond, resulting in a partial negative charge on one end of the
molecule and a partial positve charge on the other end.
O True
O False

Answers

The answer is true.

BE FIRST TO ANSWER FOR SUM GOOD!!!!!:D

Answers

Answer is B can you like btw??

the amount of space an object occupies is called its

Answers

Volume is the amount of space occupied in a object

The Tacoma narrows bridge collapsed due to?
A. Refraction
B. Reflection
C. Diffraction
D. Resonance

Answers

D. Resonance. the bridge was driven at its resonant frequency

If we know the force of an object in Newtons) and we know how fast the object accelerates in ms"), then we can easily find the mass of the object by
dividing the _ by the _

Answers

Answer:

If we know the force of an object in Newtons) and we know how fast the object accelerates in ms"), then we can easily find the mass of the object by

dividing the force by the mass

A basketball weighs approximately 1.35 kg. What is this mass in grams (g)?

step by step

Answers

Answer:

1350 g

Explanation: just add a 0

When 3.00 grams of methane, CH,, reacts according to the balanced equation below, how many molecules of water are produced?
CH, + 202 - CO2 + 2H20

Answers

Answer:

2.41×10²³ molecules of water

Explanation:

Given data:

Mass of methane = 3 g

Molecules of water formed = ?

Solution:

Chemical equation:

CH₄ + 2O₂ → CO₂ + 2H₂O

Number of moles of methane:

Number of moles = mass/ molar mass

Number of moles = 3 g/ 16 g/mol

Number of moles = 0.2 mol

Now we will compare the moles of water with methane.

CH₄ : 2H₂O

1 : 2

0.2 : 2 × 0.2 = 0.4 mol

Molecules of water:

1 mole = 6.022×10²³ molecules of water

0.4 mol ×6.022×10²³ molecules of water / 1mol

2.41×10²³ molecules of water

Please answer correctly !!!!!!! Will mark brainliest !!!!!!!!!!!!

Answers

I beleive it would be 0.8

the volume of water alone is 4.8

the volume of rock and water is 5.6

you would subtract them both to find the volume of the Rock.

Other Questions

what are Newton's 3 laws Which point is located on the line represented bythe equation y = 5x + 4? If a cube has an edge length of 0.843 cm what is the volume of the cube? (Answer should be 3 decimal places) Use this map to answer the following question.Which letter correctly labels the area claimed bythe French as of 1682?C 5x 3(x 6) = i dont know what to do Passage 2: Excerpt from School Bus Ads Bring Needed Revenue to Area Districts18 School buses are carrying more than students these days.19 The vehicles sport fancy advertisements for local businesses and events.20 It's part of the effort for school districts to make money in these budget-strapped times.21 And it is paying off.22 Lewis-Palmer School District 38 made about $8,000 in its first effort last year with eight advertisers and 11 buses. This year, it is expanding.23 "Ultimately we hope to have advertisements on every bus to maximize our income," said Robin Adair, D-38 spokeswoman. The district, which has had $11 million in cuts in recent years, is seeking a $4.5 tax increase in the November election.24 D-38 has 56 buses that collectively travel more than a half million miles a year. That could be a lot of bang for the advertising buck, and a nice amount of change for district coffers. Like Lewis-Palmer, most districts that allow advertising on their buses choose to put the money in general funds to help with such things as higher fuel and utility expenses and increased contributions to pension funds and student activities.25 Other Pikes Peak districts that use their buses as rolling billboards are Colorado Springs School District 11 and Falcon School District 49.26 Some of the advertisements on Lewis-Palmer buses include dentists, restaurants, insurance agents, a gymnasium, PTA's and the district's own programs.27 A.B. Tellez, owner of Rosie's Diner in Monument, said he signed up for two buses, one middle school that features kid's meals and shakes, and an elementary bus that features, of course, chicken nuggets. "Those buses drive everywhere. It's awesome marketing. But there is more to it than that. It's being part of the community, helping out the schools. They need funds. I thought it was neat to use dollars to support the community as well as the community supporting us."28 The districts report that the ads are approved by administrators before they are placed on the buses. There are none inside the buses to entice kids. The products must be child friendly -- no alcohol, tobacco, gaming or distasteful subjects. They don't usually allow advertising from other schools that might compete with them for students.29 Colorado in 1997 was the first state to allow school-bus advertising.(the question)Which quote from Passage 2 provides evidence that many school districts are dealing with budgetary concerns?A)"Lewis-Palmer School District 38 made about $8,000 in its first effort last year with eight advertisers and 11 buses." (paragraph 22)B)That could be a lot of bang for the advertising buck, and a nice amount of change for district coffers. (paragraph 24)C)Like Lewis-Palmer, most districts that allow advertising on their buses choose to put the money in general funds to help with such things as higher fuel and utility expenses (paragraph 24)D)Some of the advertisements on Lewis-Palmer buses include dentists, restaurants, insurance agents, a gymnasium, PTAs and the district's own programs. (paragraph 26) Idk which one is it can some help plz ); PLEASE HELP. 50 POINTS!! 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