PLS SOMEONE HELP ITS 1:30 IN THE MORNING

Balancing equations maintains the law of conservation of mass because the process shows how chemical reactions ____(a)______ and ____(b)______ with the same particles.

Answers

Answer 1

Answer:

reactants and products

Explanation:

According to law of conservation of mass

In a chemical reaction

Mass is neither created nor endorsed

So by balancing equation we fulfil this law

Answer 2

Answer:

oxidation-reduction reaction, also called redox reaction, any chemical reaction in which the oxidation number of a participating chemical species changes. The term covers a large and diverse body of processes.


Related Questions

Describe the patterns and atomic mass is an ion charges in the periodic table

Answers

Answer:

The atomic number increases across a period and down the group or family. The atomic mass generally increases with atomic number with a few exceptions.

Farsighted people have trouble seeing objects that are close to their eyes.
True
False

Answers

True, while nearsightedness, is one of the most common eyesight problems. People with this condition can't focus their eyesight on far-away objects, making them appear blurry. Farsighted is when people cannot see objects that are up close.

If someone is building a scale model of our solar system which characteristic would be the most difficult to build into the model?
1#The relative sizes of the objects
2#The colors of the objects
3#The distances between objects
4#The composition of the objects

Answers

Answer:

The composition of the objects because not all the planets have been explored

What size volumetric flask would you use to create a 0.50 M
solution using 10.00 g of CaBr2

Answers

Answer:

Explanation:

First convert the grams of Calcium Bromide to moles by using the atomic weight. Then use the formula for molarity, which is moles per liter.

CaBr2 = 199.9 g/mol

10/199.9 = 0.05 moles of CaBr2

[tex]0.5M=\frac{0.05mol}{x}[/tex]

x = 0.1L or 100mL

What are the main parts of a simple electrie motor, like the one found inside a remote control car? O a generator, wires, and turbine magnets and coils of wire O electromagnets only​

Answers

Answer:

A DC power supply, commutator, rotor armature, axle, and a field magnet.

15 g NiO is dissolved into enough water to make 800. mL of solution. What is the molar concentration of the solution? Report your answer with the correct number of significant figures.

Answers

Answer: 0.25

Explanation: M = moles of solute / volume of solution (L)

First, you need to calculate the number of moles using the given mass and the molar mass.

15 g74.692 g/mol≈0.20 mol

Then, you can solve for molarity using the molarity equation. The answer should be reported to two significant figures.

M=0.20 mol/ 0.800 L = 0.25 M

The molar concentration of  NiO solution is 0.251 M.

What is molar concentration?

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Considering the given example, molar concentration of NiO   is found out as follows,

molar concentration=15/74.69 ×1/0.8= 0.251 M.

where 74.69 is molar mass of NiO.

Thus, the molar concentration of NiO is 0.251 M.

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help me plss it’s kinda easy but i’m not sure

Answers

Answer:

Sexual Reproduction

Explanation:

In Asexual Reproduction offsprings are know as ramets and many ramets are known as clowns. So, when two parents are involved genetic variations occur in offspring. Pollen possess male gamete (antherozoid/sperm) and ovule possess egg.

A part

A fly hits a windshield of a truck. The truck exerts a force on the fly, and
the fly exerts an equal and opposite force back on the windshield.

A. Newton’s first law
B. Newton’s second law
C. Newton’s third law

Answers

Answer:

A fly hits a windshield of a truck.

Explanation:

newton's first law

Which of the following methods is least likely to help Alisha determine the age of sedimentary rock layers in her backyard?



A. Apply radiometric dating to determine the amount of radioactive isotopes in each rock layer.



B.Identify index fossils in sedimentary rock that have lived in a particular time in Earth’s history.



C. Analyze seismic diagrams to determine how radioactive elements break down into stable elements.



D. Use relative dating techniques to determine how individual fossil groups are related to specific rock layers.

ILL GIVE BRAINLIEST!11

Answers

Answer:

i put c

Explanation:

Rocks' ages are determined through radiometric dating, which takes into account the ratio of two different isotopes in a sample. Geologists can use tools like these to assess the age of a material,Mass spectrometer for thermal ionization Thus, option C is correct.

What determine the age of sedimentary rock layers?

How rocks are structured in strata and how they fit into the larger geological history are the main topics of stratigraphic study. This approach is best suited for studying sedimentary rocks. Cross dating is a method for using fossils to determine a rock's relative age.

Therefore, Index fossils are sought after by geologists in geological strata. Index fossils are useful because they show the relative dates of the rock layers in which they are discovered. Since radioactive isotopes deteriorate with known time intervals.

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During electrolysis, where do reduction reactions occur?

A. in the anode of an electrolytic cell

B. in the cathode of an electrolytic cell

C. in the power source of an electrolytic cell

D. in the salt bridge of an electrolytic cell

Answers

Answer:

B)

Explanation:

HOPE IT WILL HELP YOU

WAITING FOR YOUR RESPONSE

Answer:

( : The correct option is, (a) anode

Explanation:

Look for hazard symbols on products currently being used in your home. Name five with the corresponding symbol. You may not repeat a product name.

Answers

Answer:

bleach, hair spray,spay cleaner and idek

Explanation:

The density of pentanol, C3H20, is 0.8110 g/mL. Calculate the volume occupied by 7.455 moles of pentanol. What is the volume occupied by 7.455 moles of pentanol?

Answers

The volume occupied by 7.455 moles of pentanol is 553.5 mL or 0.5535 L.

What does molar mass of a compound signify?

The molar mass of a given compound is the mass of one mole of that compound. It is expressed in unit as grams per mole (g/mol).

To calculate the volume of pentanol occupied by 7.455 moles of the substance, we can use the following formula:

Volume = (number of moles x molar mass) / density

The molar mass of pentanol (C3H8O) can be calculated as:

3 x atomic mass of carbon (12.01 g/mol) = 36.03 g/mol 8 x atomic mass of hydrogen (1.01 g/mol) = 8.08 g/mol 1 x atomic mass of oxygen (16.00 g/mol) = 16.00 g/mol Total molar mass = 60.11 g/mol

Placing the given values into the formula, we get:

Volume = (7.455 mol x 60.11 g/mol) / 0.8110 g/mL Volume = 553.5 mL or 0.5535 L

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As human populations grow, it becomes more important to use renewable sources of energy. Which of the following objects uses energy from a renewable source?
A-a stove that is powered by natural gas

B- a refrigerator that runs on solar power

C- a lantern that burns oil from beneath Earth's surface

D- a toaster that uses electricity from a coal-burning power plant

Answers

B

explanation:
it’s common sense

Complete the following table. The first row has been completed as an example.
Symbol
Atomic number Mass number Number of protons Number of neutrons
17C1
17
37
17
20
238
U
92
92
238
146
92
325
16
32
16
16
5 Fe
54
26
I
19
1.K
41
22
Submit Answer
Try Another Version
4 item attempts remaining

Answers

Answer:

because all chemical reaction involve the rearrangement of atoms, the mass is an electron is negatively charged, it has a mass approximately 1/2000 that of a, Atoms of an element that contain the same number of protons but a different Copy and complete the following tables concerning the isotopes of silicon SI-28.

Explanation:

Sodium chloride (NaCl) is commonly used to melt ice on roads during the winter. Calcium chloride (CaCl2) is sometimes used for this purpose too. Let us compare the effectiveness of equal masses of these two compounds in lowering the freezing point of water by calculating the freezing point depression of solutions containing 220. g of each salt in 1.00 kg of water. (An advantage of is that it acts more quickly because it is hygroscopic, that is, it absorbs moisture from the air to create a solution and begin the process. A disadvantage is that this compound is more costly.) Assume full dissociation of ionic compounds. Kfp(H2O)= -1.86 °C/m.

ΔTfp= _________°C for NaCl
ΔTfp=_________ °C for CaCl2

Answers

Answer:

[tex]\Delta Tfp_{NaCl}= -14.0\°C\\\\\Delta Tfp_{CaCl_2}=-11.1\°C[/tex]

Explanation:

Hello!

In this case, since the freezing point depression caused by the addition of a solute, we use the following formula:

[tex]\Delta Tfp= i*m*Kfp[/tex]

Thus, we first need to compute the molality of each solute, as shown below:

[tex]m_{NaCl}=\frac{220.g/(58.44g/mol)}{1.00kg} =3.76m\\\\m_{CaCl_2}=\frac{220.g/(110.98g/mol)}{1.00kg} =1.98m[/tex]

Next, since NaCl has two ionic species, one Na⁺ and one Cl⁻, and CaCl₂ three, one Ca²⁺ and two Cl⁻, the van't Hoff's factors are 2 and 3 respectively, therefore the freezing point depressions turn out:

[tex]\Delta Tfp_{NaCl}= 2*3.76m*-1.86\°C/m=-14.0\°C\\\\\Delta Tfp_{CaCl_2}= 3*1.98m*-1.86\°C/m=-11.1\°C[/tex]

It means that CaCl₂ is still better than NaCl because produces involves a higher melting point for the ice, so it would melt faster.

Best regards!

If plant a, the parent plant, died from a new disease, what might happen to plant B?

Answers

If the plants are close the infection can travel over to plants that are close to them an when the photosynthesis it will observe the toxics

What happens to a solute?

Answers

Answer:

A

Explanation:

have a great day!!!!!!!!

A steel cylinder contains 4.5 mol of Xenon gas at a pressure of 5 atm and a temperature of 77 degrees Celsius. What is the volume of the Xenon tank?

Answers

Answer:

3 × 10 L

Explanation:

Step 1: Given and required data

Moles of Xenon gas (n): 4.5 molPressure of the gas (P): 5 atmTemperature (T): 77 °CIdeal gas constant (R): 0.082 atm.L/mol.K

Step 2: Convert "T" to Kelvin

When working with gases, we need to use the absolute temperature. We can convert Celsius to Kelvin using the following expression.

K = °C + 273.15

K = 77°C + 273.15 = 350 K

Step 3: Calculate the volume (V) of the tank

We can calculate the volume occupied by the gas using the ideal gas equation.

P × V = n × R × T

V = n × R × T/P

V = 4.5 mol × (0.082 atm.L/mol.K) × 350 K/5 atm = 3 × 10 L

what is the molarity of ethanol c2h5oh in an aqueous solution that is 36.4% ethanol by mass

Answers

Answer:

the answer is A

Explanation:

. Carbamide (CH4N2O), can be synthesized by the reaction of ammonia (NH3) with carbon

dioxide (CO2):

2 NH3 (aq) + CO2 (aq) CH4N2O (aq) + H2O (l)

An industrial synthesis of urea obtains 87.5 kg of urea upon reaction of 68.2 kg of ammonia

with 105 kg of carbon dioxide. Determine the limiting reactant, theoretical yield of urea and percent yeild for the reaction​

Answers

Answer:

NH₃ is the limiting reactant.Theoretical yield = 120 kg% yield = 72.9 %

Explanation:

2NH₃ (aq) + CO₂ (aq) → CH₄N₂O (aq) + H₂O (l)

First we convert the given masses of reactants to moles, using their respective molar masses:

68.2 kg NH₃ ÷ 17 kg/kmol = 4.01 kmol NH₃105 kg CO₂ ÷ 44 kg/kmol = 2.39 kmol CO₂

2.39 kmol of CO₂ would react completely with (2.39 * 2) 4.78 kmol of NH₃. There are not as many NH₃ kmoles so NH₃ is the limiting reactant.

We calculate how much urea would form with a 100% yield, using the moles of limiting reactant:

4.01 kmol NH₃ * [tex]\frac{1kmolCH_4N_2O}{2kmolNH_3}[/tex] = 2.00 kmol CH₄N₂O

We convert that amount to kg:

2.00 kmol CH₄N₂O * 60 kg/kmol = 120 kg CH₄N₂O

Finally we calculate the percent yield:

87.5 kg / 120 kg * 100% = 72.9 %

Where does an air mass gets its characteristics? A. From the air close to the sun and then it moves down to earth

B. From where it forms over the Earth and then it rises

C. From the air in the stratosphere​

Answers

Answer:

C. From the air in the stratosphere

Explanation:

I hope it will help

For the following reaction, 14.3 grams of phosphorus (P4) are allowed to react with 32.1 grams of chlorine gas. phosphorus (P4) (s) + chlorine (g) phosphorus trichloride (l) What is the maximum amount of phosphorus trichloride that can be formed? grams What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete? grams

Answers

Answer:

Limiting reactant: Cl2.

Max mass of PCl3 = 41.44 g.

P4 leftover = 5.51 g.

Explanation:

Hello!

In this case, since the undergoing chemical reaction is:

[tex]P_4+6Cl_2\rightarrow 4PCl_3[/tex]

In order to compute the maximum amount of PCl3, it is necessary to compute the grams of this product produced by each reactant, just as shown below, whereas molar masses and mole ratios are used:

[tex]m_{PCl_3}^{by\ P_4}=14.3gP_4*\frac{1molP_4}{123.89gP_4} *\frac{4molPCl_3}{1molP_4} *\frac{137.33gPCl_3}{1molPCl_3} =63.41gPCl_3\\\\m_{PCl_3}^{by\ Cl_2}=32.1gCl_2*\frac{1molCl_2}{70.91gCl_2} *\frac{4molPCl_3}{6molCl_2} *\frac{137.33gPCl_3}{1molPCl_3} =41.44gPCl_3[/tex]

Thus, since chlorine gas yields fewer grams of PCl3 than P4 we infer Cl2 is the limiting reactant and 63.41 grams of PCl3 product are yielded.

Finally, for the excess reactant, we see a difference of 63.41-41.44=21.97g, so we can compute of the leftover of P4 as follows:

[tex]m_{P_4}^{leftover}=21.97gPCl_3*\frac{1molPCl_3}{137gPCl_3} *\frac{1molP_4}{4molPCl_3} *\frac{137.33gP_4}{1molP_4} =5.5gP_4[/tex]

Best regards!

Which two notations represent isotopes of the same element?
1.
N and EN
2.
N and Ne
3
N and Ne
4.
N and Ne
Submit Answer

Answers

Answer:

No.2, No.3 and No.4 answers are same. Give the options properly.

Name the following alkene compound

Answers

The alkene compound is called 1-Butene.

Pl help it’s for a grade

Answers

i think it’s B. 58
because that’s the answer

A major textile dye manufacturer developed a new yellow dye. The dye has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of about 240 g/mol. Determine the molecular formula of the dye.

Answers

Answer:

C₁₅N₃H₁₅

Explanation:

Follow the sequence ...

%/100wt => grams/100wt => moles => mole ratio => reduce mole ratio (divide by smaller mole value) => empirical ratio.

Note: If the above calculation comes out with a fraction (for most textbook problems) do the following:

--.25 => multiply empirical ratio by 4

--.50 => multiply empirical ratio by 2

--.75 => multiply empirical ratio by 4

Or, if initial data is given in grams, convert to %/100wt. (example at end of problem)

This Problem:  

         %/100wt.   grams         moles =mass/formula wt.

%C = 75.95% => 75.95g => 75.95g/12.0107g·mol⁻¹ = 6.325 mole OS

%N = 17.72% =>  17.72g => 17.72g/14.0067g·mol⁻¹ = 1.2651 mole N  

%H =  6.33% =>   6.33g =>  6.33g/1.00794g·mol⁻¹ = 6.28 mol H              

(∑  =   100%    | assume 100g cpd  => ( grams => 100g compound would contain 75.95g C, 17.72g N & 6.33g H )

=> mole ratio =>  C : N : H => 6.3235 : 1.2651 : 6.28  

=> reduce mole ratio ( divide by smaller mole value ) ...

=> 6.3235/1.2651 : 1.2651/1.2651 : 6.28/1.2651 =>  empirical ratio is => 5:1:5

empirical formula => C₅NH₅

empirical formula wt. = 5C + 1N + 5H = 5(12) + 1(14) + 5(1) = 79

=> molecular ratio (n) => molecular wt (given) = N · empirical formula wt

=> N =  molecular wt / empirical wt = 240/79 = 3

∴ Molecular Formula is =>  C₅NH₅ X 3 => C₁₅N₃H₁₅

________________________________________

EXAMPLE: Empirical Formula Problem with initial data in grams:

Assume an oxide of Osmium (compd wt) = 2.89 grams contains 2.16 gram Osmium, what is the empirical formula?

Use given mass values to calculate %/100wt then use the sequence

% => grams => moles => reduce => emp. ratio => emp. formula

%Os = 2.16g/2.89g x 100% = 74.74%

%Oxy = [(2.89g -2.16g)/2.89] x 100% = 25.26% or use 100% - 74.74% = 25.26%

%  => g => moles => reduce => emp formula

%Os   = 74.74% => 74.74g => 74.74g/190.23g·mol⁻¹ = 0.3929 mol Os

%Oxy = 25.26% => 25.26g => 25.26g/16g·mol⁻¹ = 1.5788 mole Oxy

Reduce mole ratio (divide by smaller mole value) => empirical ratioo

=> Os:Oxy => 0.3929/0.3929 : 1.5788/0.3929 = 1 : 4

=> Empirical Formula => OsO₄

What is the difference between Claire’s test of the collision scene where Vehicle 2 fell off the cliff and the film, Iceworld Revenge, where it did not?*

Which claim is more convincing?

Claim 1: The vehicles in Iceworld Revenge had different masses; in Claire’s test, the vehicles had the same mass.

Claim 2: The friction of the surface that was used in Iceworld Revenge was different from the friction of the surface in Claire’s test.

Did the Science Seminar cause your thinking about the claims to change? Explain.

Answers

Complete Question:

Check the file attached to get the complete question

Answer:

In the film Ice word Revenge, vehicle 2 did not fall of the cliff because,  but in Claire's test, vehicle 2 off the cliff because

Explanation:

In Claire's test, the weight of vehicle 1 is either equal to or greater than the weight of vehicle 2, so it was sufficient to push it down the cliff.  In the film Ice word revenge, the weight of vehicle 1 is less than the weight of vehicle 2, it is not sufficient to make it fall off the cliff ( Note: Looking exactly the same in the movie, as Claire claimed, does not mean they have the same mass). Therefore if Claire wants a collision that will not make the vehicle 2 fall off the cliff, he should collide it with a vehicle of lesser mass/weight.

In the benzene molecule, carbon atoms form a ring with alternating single and double bonds in between each of them. Each carbon atom forms one σ bond with one carbon atom and one σ and one π bond with another. The π bonding electrons are delocalized over the entire molecule. Thus, benzene is a resonance hybrid of two equivalent structures, and the single and double bonds oscillate from one position to the other.

Required:
Calculate the bond order for one carbon-carbon bond in the benzene molecule, taking σ and π bonding into consideration.

Answers

Answer:

1.5

Explanation:

From;

BO = ½(B – A)

BO= Bond order

B= Number of bonding electrons

A = Number of antibonding electrons

For the sigma bonds, there are 2 bonding electrons and 0 nonbonding electrons.

σ BO = ½(B – A) = ½(2 – 0) = 1

π bond order for 6 C-C bonds;

π BO = ½(B – A) = ½(6 – 0) = 3

For each  π bond, BO = 3/6 = 0.5.

Hence, for a single C-C bond in benzene, the total Bond order = σ + π = 1 + 0.5 = 1.5.

Do you agree / disagree - Light is always the same, even when it is emitted by different light sources (like the sun and a light bulb).

Answers

Answer:

She's right that there's a difference, and you are right that it's all just electromagnetic waves!

The key to this is that there is no such thing as "white light" when you really get down to it. Each light emits a range of wavelengths of light. If they have a sufficiently even distribution of wavelengths, we tend to call that light "white," but we can only use that term informally.

Both the sun and the light bulb emit so-called "Blackbody radiation." This is the particular spectrum of light that's associated with the random thermal emissions of a hot object. Cool objects tend to emit more of their energy in the longer wavelengths like reds and IRs, while hotter objects emit more energy in the shorter wavelengths like blues and UV.

Blackbody graphic

(Note, there are other possible emission spectra, but those are associated with different materials doing the emissions and, for the purposes of this discussion, they aren't too important. We can just claim the emissions are all blackbody)

If you notice, as you get hotter, a larger portion of the energy is emitted in the blue, violet, and ultraviolet. That's how you get a sunburn from the sun. It's harder to get a sunburn from an artificial light, not because it's artificial, but because those lights are almost always cooler than the sun. They don't have as much UV content. Instead, they have more red and yellow, which incidentally is why pictures taken indoors look very yellow. If you use a strobe, however, all those yellow hues go away because a strobe light is very warm, with lots of blues.

You can get a sunburn from artificial light, of course. Tanning beds are the obvious example, but there are other interesting ones. When you're a jeweler working in platinum, for instance, you need to wear UV protective gear (like glasses or even sunscreen). Platinum's melting point is so hot that it actually emits quite a lot of UV light and can give you a sunburn!

Other than these spectra, there is nothing different between light from an artificial source and light from the sun. Photons are photons.

Explanation:

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#STAY SAFE

What is the formula for Triphosphorous nonaoxide

Answers

What is the formula for Triphosphorous monaoxide ? C3CI8
Other Questions
please help me! im really confused on this because i keep getting -5 outside the thing Suppose you have a collision involving another car with a single occupant, the driver. It is your fault. No one is seriously hurt, but the other driver chooses to go to the emergency room to be checked out. The medical cost is $1,500. The damage to your car is $3,000, And the damage to the other car is $6,000. You have the following minimum coverage:Bodily injury liability coverage: $15,000 per person, $30,000 per accidentProperty damage liability coverage: $5,000No collision.1. How much would your insurance pay and how much would you pay? Explain why. The developmental theorist who suggested that securely attached children develop an attitude of basic trust is:_______ The total age of Sana, Rabia and Saleem is 47 years. What was the total of their ages three years ago? Copy DEF to the line so that S is thevertex.This task will be complete when you haveconstructed an angle with vertex S that iscongruent to ZDEF. Measure the length of AD & D B what is the ratio of AD to DB WILL GIVE BRAINLIEST1. Write an expression for each of the following:a. the sum of 6 and zb. the difference between 20 and xc. 8 less than the quotient of x divided by 6d. x increased by 5 divided by 4 Jasmine wants to buy a car marked at $5200 at a second hand car dealer. The deposit is two-fifth of the price of the carfor the next weck's delivery. Jasmine's father helped her in the deposit by paying 30% of the price. Will jasmine haveenough for her car deposit? If not, how much more does she need to add to get the deposit? A Web browser must keep track of the sites that you have visited so that when you click the ""back"" button it will return you to the most recent site. Children may be placed in restraining devices such as high chairs, swings or bouncy seats:No more than one hour per dayWhile the caretaker or teacher is busy with other tasksNo more than 15 to 30 minutes per interval and no more than twice per dayAs long as the child remains content Find the sum of the series: 4+8+12+........to 20 term. In (n The specific heat of copper is 0.385 J/gC.How much heat is needed to raise the temperature of 6.00 g of copper by 15.0C?35.0 J90.0 J234 J34.7 J Fire spreading from a wall to a nearby couch due to radiant heat transfer is an example of: Select one: Companies like State Farm, a leading property and casualty insurance company, believe that the best way to create relationships with customers is to join them in activities they enjoy. Which type of market segmentation best captures this combination of age and interest in contemporary or alternative music Find DE3x - 283x - 30DGEF33 Joe needs to get to his house, which is 106 miles away in 2 hours. How fast does he need to drive? 48 mph 104 mph 0.019 mph 53 mph is natalie davis actively involved in the decisions of the business woolworths A man ordered 4 times as many boxes of ballpoint pens as boxes of felt-tip pens. Ballpoint pens cost $4.41 per box, and felt-tip pens cost $3.44. If the man's order of pens totaled $63.24, how many boxes of each type of pen did he buy?How many boxes of felt-tip pens did he buy? Early in the year, Marlon was in an automobile accident during the course of his employment. As a result of the physical injuries he sustained, he received the following payments during the year: If a problem is 8(2x+4) = 2(1x+3) is the first step done of PEMDAS for THIS SPECIFIC PROBLEM parentheses or multiplication?