Hi can someone help me answer this!

Hi Can Someone Help Me Answer This!

Answers

Answer 1
the answer to this question is B.

Related Questions

Can you think of a way you use the geometrical terms reflection and translation in real life?

I have aids ;-;

Answers

Answer:

building really complicated legos

Explanation:

Which statement best describes the process of the formation of the solar system?

Answers

Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material

i need help on these questions please!!!
the link for the vid will be in the comments

Answers

I don’t see the video but I can still answer number 2! One example is when you boil water it evaporates as it gets hot. Another example is when you take a shower, the water on your body evaporates as you dry!

Predict: Note the type of reaction you expect for
the sole reactant Na2CO3.
a. single replacement
b. double replacement
c. combustion (and synthesis)
d. synthesis
e. decomposition

Answers

Answer:

double replacement

Explanation:

Answer:

It is indeed double replacement

Explanation:

I SWEAR THIS IS WAY TOO EASY, WHY AM I THAT STUPID, HELP ME AND ILL MARK U BRAINLIEST

Answers

Answer:

i think the first one is gravity and second one is rotation

Explanation:

uses of ethanol as a reagent​

Answers

Reagent in synthetic organic chemistry and chromatography. Industrial and laboratory organic solvent. Other uses are in manufacture of denatured alcohol, pharmaceuticals (rubbing compounds, lotions, tonics, colognes), in perfumery. Octane booster in gasoline.

Is meat a mixture or substance?

Answers

Answer:

This type of meat is substance. If you were talking about meters then it would be a system of measurement.

Answer:

Mixture

Explanation:

Meat is composed of approximately 72–75 % water, 21 % nitrogenous compounds (19 % proteins and 1.5 % nonprotein nitrogen compounds which include nucleotides, peptides, creatine, and creatinine), 2.5–5 % lipids, 1 % non-nitrogenous compounds (vitamins) and carbohydrates (a very small amount of glycogen).

ClO3− Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all nonhydrogen atoms, or use square brackets to denote the overall charge. View Available Hint(s)

Answers

Answer:

See explanation

Explanation:

The overall charge on ClO3−  is shown on the image attached to this answer. If we calculate the formal charges on each atom in the structure, we will notice that one oxygen atom has a formal charge of -1 while all other atoms have a formal charge of zero.

This gives the compound an overall charge of -1 as shown in the image attached to this answer. This is the correct Lewis structure for the compound ClO3− .

The molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.

When all the electrons of an atom are shared equally, the charge attained by the atom is known as a formal charge.

The formal charge can be calculated as:

Formal charge = valence electron - non-bonding electron - [tex]\rm \dfrac{bonding\;electron}{2}[/tex]

In the molecule, the formal charge of Oxygen = -1.

In the molecule, the formal charge of Chlorine = +2

The oxygen atom has 8 electrons, in which 2 are shared in the bond formation, and 6 electrons are valence electrons.

The chlorine atom has 7 valence electrons in which 6 electron pairs are shared with the oxygen atom, and 1 lone pair has been available with Cl.

The structure of [tex]\rm ClO_3^-[/tex] molecule has been given in the image attached. The image shows the available lone pairs and the bonding in the structure.

Thus, the molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.

For more information about the formal charge, refer to the link:

https://brainly.com/question/9847214

Do S and Na have the same number of
electron shelis?

Answers

Answer:

Yes

Explanation:

Sulfur and Sodium will have the same number of electron shells.

  Electronic configuration of

           k   l  m

  Na = 2  8  1

   S =  2  8  6

We see that the have the same energy level.

Also, they belong to the same period on the periodic table. Elements in the same period will have equal number of shell.

Drag each phrase to indicate which flood mitigation technique it describes.(2 points)
floodplain management stormwater management elevated structures
reduces water runoff into streets, lawns, and other sitesprotects buildings in low-lying areas prone to floodsraises structures above flood levelenhanced by the addition of urban green spacesused mainly on the coast
Highlight

Answers

The phrase to indicate the flood mitigation technique it describes are:

Floodplain management – protects buildings in low-lying areas

stormwater management – reduces water runoff into streets, lawns, and other sites, and enhanced by the addition of urban green spaces.

Elevated structures-used mainly on the coast, raises structures above flood level.

What is flood mitigation?

Flood mitigation is the control and management of movement of the blood water.    

It includes flood gates and flood walls which manage the water of flood and prevent it from destroying building and homes.

There are different types of flood mitigation techniques for different areas.

Thus, Floodplain management – protects buildings in low-lying areas

stormwater management – reduces water runoff into streets, lawns, and other sites, and enhanced by the addition of urban green spaces.

Elevated structures-used mainly on the coast, raises structures above flood level.

Learn more about flood mitigation

https://brainly.com/question/20783715                                                                                                                                                                                                                                              

Flood mitigation manages and controls the flood water by removing inhabitants from the area.  Floodplain management protects buildings.

What is flood mitigation?

A flood mitigation is the control and management of the flood water by floodgates and floodwalls to prevent and protect the buildings and people.

The floodplain management of the mitigation technique involves the protection of low-lying buildings, stormwater management controls the flow of the floodwater flow in the streets and elevated structures are used in coastal regions to raise the level of the floodwater.

Therefore, different flood mitigation techniques are used to control and manage flood water.

Learn more about flood mitigation here:

https://brainly.com/question/26279880

What mass of water must be used to dissolve 0.500 kg C2H5OH to prepare a 3.00 m solution?​

Answers

Answer:

500g Ika= 10.85 mol 500g (46.0699) - 10.35 mol - 3.00m - 13.62 kq 5.

Explanation:

Does this help?

A 3.00 M solution of [tex]C_2H_5OH[/tex] would be prepared by dissolving 0.500 kg of  [tex]C_2H_5OH[/tex] in 3.62 kg of water.

Stoichiometric calculation

0.500 kg  [tex]C_2H_5OH[/tex] is equivalent to (mole = mass/molar mass):

      500g/46.07 = 10.85 moles of  [tex]C_2H_5OH[/tex]

3.00 M solution of  [tex]C_2H_5OH[/tex] can be prepared by dissolving 10.85 moles in (molarity = moles/volume):

                      10.85/3 = 3.62 Liters of water

3.62 liters of water weighs (density = mass/volume);

              1 x 3.62 = 3.62 kg

Thus, 3.62 kg of water will be required to prepare the solution.

More on stoichiometric calculations can be found here: https://brainly.com/question/27287858

#SPJ2

The particles in liquids and gases show random motion. What does that mean and why does it occur??

Answers

Answer:

Liquids and gases show random movements because of potential and kinetic energy.

It happens when heat is applied to the particles and they gain more potential and kinetic energy and move around faster. With gases, they have the most energy.

If anything doesnt make sense, make sure to message me

Answer:

The particles show random motion because liquid and gas particles do not have a rigid structure, unlike solid particles. They are free to go anywhere.  

Explanation:

A photon has an energy of 2.34x10-28 J. What is its frequency?

Answers

Answer:

f = 3.53×10⁵ s⁻¹

Explanation:

Given data:

Energy of photon = 2.34×10⁻²⁸ J

Frequency = ?

Solution:

h = 6.63 ×10⁻³⁴

Formula:

E = hf

2.34×10⁻²⁸ J = 6.63 ×10⁻³⁴ × f

f = 2.34×10⁻²⁸ J /  6.63 ×10⁻³⁴ Js

f = 0.353×10⁶ s⁻¹

f = 3.53×10⁵ s⁻¹

Maggie has 4 binders with 30 stamps in each binder. She has 3 binders with 36 baseball cards in each binder. If she gives away 45 stamps to a friend, how many stamps and cards does she have left? Maggie has stamps and cards left.

Answers

Answer:

The number of stamps and cards Maggie has left if she gives 45 stamps to a friend is 183

Explanation:

If Maggie gives 45 stamps to a friend, you must calculate the number of stamps and cards she has left.

You know Maggie has 4 folders with 30 stamps in each folder. So the number of stamps she owns is calculated as:

4 folders*30 stamps in each folder= 120 stamps

If Maggie gives 45 stamps to a friend, then the number of stamps she has left will be calculated as the difference (the subtraction) between the stamps she owned and the ones she gives away:

120 stamps - 45 stamps= 75 stamps

On the other hand, she has 3 binders with 36 baseball cards in each binder. So the number of cards she owns is calculated as:

3 binders * 36 baseball cards in each binders= 108 baseball cards

The number of stamps and cards you have left is calculated as:

75 stamps + 108 baseball cards= 183

The number of stamps and cards Maggie has left if she gives 45 stamps to a friend is 183

12. If the particles of a liquid are always moving, why don't they all come apart from each other and become a gas?​

Answers

Answer:

even though the particles of a liquid are moving, they are attracted to each other so they don't spread far apart to become a gas.

Explanation:

"but some do when they evaporate"

In liquids, the particles are allowed to move freely rather than the solid. The gaseous particles can move more freely than liquids.

Particles in liquids:

In liquids, the particles are placed randomly and thus are allowed to move freely but they do not become a gas as liquids are slightly less compressible than gases.  Even though the particles of a liquid are moving, they are attracted to each other so they don't just spread far apart to become a gas.

Find more information about Liquids here:

brainly.com/question/752663

What is the mass of 0.0467 mol of the element sodium (Na)

Answers

Answer:

Explanation:

All periodic tables list different amounts of elemental masses. I'm going to round Sodium to 23

1 mol of sodium = 23

0.0467 mol sodium = x

Cross multiply

1*x = 0.0467 * 23

x = 1.0741 grams

You can also do it this way

The equation to find
moles(n) = m(g)/M(g.mol^-1)

Therefore if you rearrange the equation to find the mass(g) you can solve.

m = nM
m = (0.0467mol) * (22.99g.mol^-1)
m = 1.0736g

SOLVED!!

n = moles
m = grams
Molar mass = g.mol^-1 = grams per moles

*= multiplying

Hope that helps

Difference between bouyancy and density

Answers

Answer:

what She said but better

how many moles of sulphur are in 53.7 grams of sulphur​

Answers

Answer:

1.67 mol S

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic TableUsing Dimensional Analysis

Explanation:

Step 1: Define

53.7 g S

Step 2: Define Conversions

Molar Mass of S - 32.07 g/mol

Step 3: Convert

[tex]53.7 \ g \ S(\frac{1 \ mol \ S}{32.07 \ g \ S} )[/tex] = 1.67466 mol S

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.67466 mol S ≈ 1.67 mol S

Which of these changes is a chemical change?
A. A block of ice forms liquid water when salt is sprinkled on it.
B. A block of ice is crushed into small pieces.
C. A block of ice melts when heated.
D. A block of ice fizzes and forms a gas when sodium is sprinkled on
it.
please help :)

Answers

It’s d I’m pretty sure that’s correct

Rain freezes as it hits the ground to form solid water is this a physical change or chemical change?

a. Physical change
b. Chemical change

Can someone help me answer this I will give your brainliest

Answers

A physical change because it is still water :)

Answer:

It is Physical Change

Explanation:

Because it is just water turning into another substance of water, nothing chemical is happening.

Magnesium (24.30 g) reacts with hydrogen chloride (X g) to produce hydrogen gas (2.04 g) and magnesium chloride (96.90 g). How much hydrogen chloride was used in the reaction?

Answers

Answer:

[tex]74.64\ \text{g}[/tex]

Explanation:

Reactants

Magnesium = 24.3 g

Hydrogen chloride= x g

Products

Hydrogen gas = 2.04 g

Magnesium chloride = 96.9 g

As the mass of the reactions is conserved we have

Mass of reactants = Mass of products

[tex]24.3+x=2.04+96.9\\\Rightarrow x=2.04+96.9-24.3\\\Rightarrow x=74.64\ \text{g}[/tex]

Mass of hydrogen chloride is [tex]74.64\ \text{g}[/tex].

A baseball is thrown a distance of 20 meters. What is its speed if it takes 1 second to cover the distance?

Answers

I think the speed is eiejne7282

The specific heat of a substance which absorbs 7.5 x 10^3 J of
heat when a sample with a mass of 1.0 x 10^5g of the
substance increases in temperature from 10°C to 90° C will
be:

Answers

Answer:

9.4 x 10^-4 J/g°C

Cookware companies have been using a chemical called C-8, which helps to create a nonstick coating to pans. However, the Environmental Protection Agency (EPA) recently claimed that the use of C-8 in the manufacturing of nonstick cookware should be discontinued because studies show it causes cancer.

Who might benefit financially the most from the EPA’s claim?

Answers

OwO ^ ^ its A guys knowing cause i took the test

Answer:

C

Explanation:

cookware manufacturers who make pans out of steel only

Which one of the following statements about orbitals is INCORRECT?

1) orbitals are regions in space where one is likely to find an electron

2) orbitals can hold up to two electrons

3) orbitals can hold two electrons provided they are spinning in the same direction

4) s, p, d and f orbitals are possible

Answers

3) is the incorrect statement. Electrons must pair with opposite spins since they are both negatively charged and would therefore repel each other.

3) orbitals can hold two electrons provided they are spinning in the same direction

We define an orbital in chemistry as a region in space where there is a high probability of finding an electron.

Each orbital holds a maximum of two electrons which spin in opposite direction according to Pauli exclusion principle.

According to this principle no two electrons can have the same set of quantum numbers. As a result, the spin quantum numbers of two electrons in the same orbital must differ hence they spin in opposite directions.

https://brainly.com/question/19536139

Astatine-210 has a half-life of 8.08 days. What fraction of a sample of astatine-210 is left unchanged after 16.16 days?

Answers

Answer:

0

Explanation:

Given parameters:

Half-life  = 8.08days

Unknown:

What fraction is left unchanged after 16.16days = ?

Solution:

The half - life of a substance is the time taken for the half of a radioactive material to decay to half.

 

  Day 0           Day 8.08         Day 16.16

   100%                 50%                 0%        Parent

    0%                     50%                100%     Daughter

After 16.16 days, non of the original sample will remain unchanged.

Which machine is the least simple? a bike a screw an inclined plane a lever

Answers

Answer: A bike

A bike is composed of various simple machines. It has a wheel and axle as one component, and it also has screws to hold the various parts together, along with levers and pulleys that are connected to the pedals. So all of these simple machine concepts work together to help transport the rider from point A to point B.

The other answer choices of screw, inclined plane, and lever, are fairly simple machines that don't have many things going on at once compared to a bike.

The least simple machine is "A Bike"

Hope this helps!

Populations in the deep-sea vent ecosystem can get energy storage molecules without sunlight. Do you agree or disagree with this claim? Explain your answer.

Answers

Answer:

Agree

Explanation:

The deep-sea vent ecosystem gets energy storage molecules without sunlight. Life in the vent ecosystem relies on alternate energy through the use of hydrogen sulfide present in the water emanating from the vent.

The producers that form the basis of the food chain are bacteria that use the hydrogen sulfide to create energy-rich molecule in a process known as chemosynthesis.

The equation of the chemosynthesis is as below:

[tex]CO_2 + 4H_2S + O_2 --> CH_20 + 4S + 3H_2O[/tex]

How you find a unknown element (just with the atomic emission spectrum)

Answers

Each natural element has a characteristic light spectrum that helps identify it in samples of unknown substances. Spectroscopy is the practice of examining spectra and comparing them to those of known elements. Using spectroscopy methods, scientists can identify pure substances or compounds and the elements in them.

What will happen to a salt water fish if placed in freshwater?

Answers

Answer:

they will die because they need to be in salt water

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ASAP need answer I will give brainliest check out the picture Solve 4|x - 3| > 8.O A. X25O B. x< 1 and x2 5O c. xs1 or x2 5O D. XS1 Which economic challenge does Eastern Europe face today?pressure to join the European Unionno markets for its goodslabor shortageslack of modernized industries Let f be the function defined as follows.(a) Find the differential of f.dy =(b) Use your result from part (a) to find the approximate change in y if x changes from 2 to 1.97. (Round your answer to two decimal places.)dy =(c) Find the actual change in y if x changes from 2 to 1.97 and compare your result with that obtained in part (b). (Round your answer to two decimal places.)y= Select the better deal in the pair. Then give the unit rate for the better deal.$56/25 gal or $32.05/15 gal What part of the Secret Treaty at Velasco did many Texans dislike? How do you feel about the decision? Why? study the pictures carefully. what visual elements does each picture show? ______ readers are most likely than others have successful reading experienceActive, fiction, nonfiction, passiveThe answer is active :D so am I right or wrong? What is the slope intercept form for this ? What is the best method of prevention for the transmission of vaccine-preventable diseases? A line intersects the points (3,-4) and (1,2).What is the slope intercept equation for this line 9) Brenn has $60 in his savings account. His brother Chris has $135 in his. Brenn decides to save $5 of his allowance each week, while Chris decides to spend his whole allowance along with $10 of his savings each week. After how many weeks will Brenn and Chris have the same amount of money in their savings accounts? HELP WILL GIVE BRAINLIEST!! Read the beginning of a sonnet.With valentines, I'll offer her my heartCan cards express the sentiment I feel?Which pair of lines best completes the quatrain usingsonnet conventions for rhyme?a. I'll say that we should never be apartAnd candy hearts will sweeten my appealb. I'll promise her my love for her is realAnd color her a priceless work of artc. I'll write the words to share my secret hopesMy feelings I will finally reveald. I'll send the notes to brighten up her dayAnd hope that she feels the same way help me, please it would get 15 points Megan bought 2 1/4 pounds of bananas for $0.80 per pound and 1 1/2 pounds of strawberries for $1.10 per pound. How much more did Megan spend on bananas than on strawberries? In the middle of the night you are awakened by hunger pains. You proceed to get up and go to the kitchen to have a couple of cookies and a glass of milk. Satisfied you go back to bed content. Explain in detail what organs, and organ systems are involved in completing that task. Describe the physical and chemical digestive processes as well as the delivery of the nutrients to the cells all around the body. Be sure to include how the systems interact.help plz lol why is this a thing please tell me why? i need this asap, will give brainliest to fast answers!! :) I need helpppp plzzz Which ordered pair is a solution of the system of equations shown in the graph below?