4. What energy transformation takes place when you light a match?
electromagnetio to potential
b. chemical to nuclear
O. mechanical to thermal
d. sound to eleotrioal

Answers

Answer 1

Mechanical Energy to Thermal Energy

hope it helps...!!!


Related Questions

What is the mass of 89.6 L of NH3(g) at STP?

Please help I don’t understand!

Answers

Answer:

68g

Explanation:

GMM of NH^3=14+3=17g

Mass =mole×GMM=4×17=68g

hope this helps<33 :)

Citric acid is made by oranges. When citric acid dissolved in water , it produces a relatively small number of hydronium ions. Citric is best described as a

Answers

Answer:

Citric acid is a weak organic acid found in citrus fruits.

Explanation:

how can you separate sand and water without filter paper​

Answers

Answer:

through Decantation

Explanation:

Decantation: Decantation is pouring out of upper clear layer of liquid into another container to separate two immiscible liquids or to separate different substances in a suspension mixture.

Therefore, we could use decantation once the sand particles settle down by gently pouring the water into another container. Once the water is transfered, we'll be left with sand in the bottom of the first container.

Hope that helps...

**Multiple Choice**

**Q:** When an acid reacts with a metal, what is one of the usual products?


(a) carbon dioxide

(b) water

(c) hydrogen gas (this?)

(d) salt

(e) none of the above

Answers

Answer:

When an acid reacts with a metal, what is one of the usual products?

C) Hydrogen gas

Explanation:

Marie had to wait at the railroad tracks from a train to pass. How long did she wait?

Answers

Answer:

she waited 30 minutes

Explanation:

  i need brain liest

The instantaneous rate data in Table 3 were obtained for
the reaction H2(g) + 2NO(g) →H2O(g) + N2O(g) at a
given temperature and concentration of NO. How does
the instantaneous rate of this reaction change as the
initial concentration of Hy is changed? Based on the
data, is [Hz] part of the rate law? Explain.

Answers

Answer:

A) As the initial concentration of H₂ is increased, the reaction rate also increases.

B) Yes, [H₂] is part of the rate law.

Explanation:

For the reaction:

[tex]\displaystyle \text{H$_2$}_\text{(g)} + 2\text{NO}_\text{(g)} \longrightarrow \text{H$_2$O}_\tex{(g)} + \text{N$_2$O}_\text{(g)}[/tex]

The rate law will have the form:

[tex]\displaystyle \text{Rate} = k\left[\text{H$_2$}\right]^n\left[\text{NO}\right]^m[/tex]

Where n and m are the respective order of reactions.

From the table, we can see that as the concentration of H₂ increases, the instantaneous rate also increases.

Therefore, [H₂] is indeed part of the rate law. If it isn't, changing its concentration will have no effect on the instantaneous rate of the reaction.

How much concentrated 12M hydrochloric acid is needed to prepare 100. mL of a 2.0M solution?

Answers

Taking into account the definition of dilution, 16.67 mL of 12 M hydrochloric acid is needed to prepare 100. mL of a 2.0M solution.

Definition of dilution

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

Ci: initial concentration.Vi: initial volume.Cf: final concentration.Vf: final volume.

Volume of hydrochloric acid needed

In this case, you know:

Ci= 12 M Vi= ?Cf= 2 MVf= 100 mL

Replacing in the definition of dilution:

12 M× Vi = 2 M× 100 mL

Solving:

Vi = (2 M× 100 mL)÷ 12 M

Vi= 16.67 mL

In summary, 16.67 mL of 12 M hydrochloric acid is needed to prepare 100. mL of a 2.0M solution.

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The equation above is not balanced. Balance the equation on a scratch sheet of paper. Match each letter to the correct coefficient that will balance the equation. Remember, if there is no coefficient, it is understood to be 1. Some numbers may be used more than once.

Answers

In order to balance the equation, A would be 1, B would be 3, C would be 1, and D would be 2 respectively.

Balancing chemical equation

A balanced chemical equation has the same number of each of the component atoms at the reactant and product sides.

Thus, the balanced chemical equation for the reaction in the illustration would be:

[tex]CS_2 + 3O_2 --- > CO_2 + 2SO_2[/tex]

Thus:

A = 1B = 3C = 1D = 2

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A 16.0 g sample of methane gas, CH4, the gas used in a chemistry lab, has a volume of 5.0 L at 27ºC. Calculate the pressure.

Answers

Answer:

4.9 atm

Explanation:

convert 16.0g of CH4 to moles

16.0 g CH4 x 1 mol CH4/16.0 g CH4 = 1.00 mol of methane

convert the temp into Kelvins: 27 + 273 = 300.K

PV = nRT

(P) (5.0 L) = (1.00 mol) (0.0821 L atm/mol K) (300.K)

P = 4.9 atm

How many grams of glucose are disolved in 500 ml of a .50% glucose solution

Answers

Answer:

To make 500 ml, you need 5x this amount. 5 x 4.33 g = 17.21 g glucose in a final volume of 500 ml

Explanation:

hope this helps

pH of a 4.5x10-6 M solution of HCl.

Answers

[tex]\text{pH} = -\log[H^{+}] = - \log[4,5 \times 10^{-6}] = 5.34[/tex]

If the Ksp of NaCl is experimentally determined to be 53.9, then what is the concentration of Na (in M) when it begins to crystallize out of solution

Answers

For the concentration of Na in M when it begins to crystallize out of the solution is mathematically given as

Na+ = 0.125M

what is the concentration of Na in M when it begins to crystallize out of the solution?

Generally, the equation for the Ksp of the solution is mathematically given as

Na⁺+CL⁻

Ksp = SxS

53.9 = s^2

S = 7.34

Molar mass Nacl 58,44

Solubility = 7.34/58.44

Solubility = 0.125M

In conclusion, the concentration of Na in M when it begins to crystallize out of the solution

Na+ = 0.125M

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Which statement is an example of competition?

Answers

"I'll win everyone at the camp games this year."

Explanation:

This above statement is an example of competition because it signifies a matter anticipating an upper hand towards some other matter.

A balloon has a volume of 12.0 L at a pressure of 98.7. kPa. What will be the new volume when the pressure drops to 56.7 kPa?

Answers

Answer:

20.89 LITERS

Explanation:

P1V1=P2V2

P1V1 / P2 = V2

98.7 * 12/56.7 = 20.89 LITERS

Which of the following scenarios best describes separation by distillation?
A sample of ocean water is boiled in a glass flask. A solid remains in the flask, and a hot gas flows
into a cooling chamber. When the as cools enough, it condenses back into a liquid in a separate flask.
O a stip of paper with a sample of ink is placed in a jar. The liquid runs up the paper, resulting in
colored bars running up in a line.
O A funnel and porous paper are used to separate solids in a sample of dirty water from the liquid.
O Aliquid sample is spun quickly in a centrifuge. A layer of solid forms on the bottom of the test tube
over time.

Answers

A sample of ocean water is boiled in a glass flask. A solid remains in the flask, and a hot gas flows
into a cooling chamber. When the gas cools enough, it condenses back into a liquid in a separate flask.

The average resting heart rate is between
A. 80-90 bpm
B. 90-100 bpm
C. 60-70 bpm
D. 70-75 bpm

Answers

A. 80-90 bpm
Hope it helps

The average resting heart rate is between is 70- 75 bytes per minute. This include systolic pressure and diastolic pressure. Hence, option D is correct.

What is heart rate?

The count of heart beats per unit time is called heart rate.  For a normal condition at the resting time the average heart rate is 70 -75 beats per minute.

The heat beats we hear is the impulse from the open and closing of the heart valves. This includes the systolic and diastolic blood pressures. For a normal person at the systolic rate is 120 mm Hg and diastolic rate is 80 mm Hg.

The blood pressure rate is depends on the diet, inheritance and other factors such as age, physical activities, mental situations etc. For a normal person, the average resting heart rate is 70 - 75 bpm.

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Of the following elements, which has the lowest electronegativity?

Br


Cl


Ca


Mg

Answers

The metal with the highest electro positivity has the lowest electronegativity(since electronegativity is the property of non metals). Now Magnssium is more electro positive making it the least electronegative

For a reaction where ∆H° = +573 kJ/mol and ∆S° = +1.64 kJ/mol・K, at what temperature, in K, does X(l) → X(g) occur spontaneously?

Answers

The temperature in kelvin (K) in which the reaction occurs spontaneously is given as  349 K

What is entropy?

Entropy is simply defined as the measure of the degree of the disorderliness of a system. Mathematically, it can be expressed as:

ΔS = ΔH / T

Where

ΔS is the change in entropy of system ΔH is the enthalpy change T is the temperature

How to determine the temperature Enthalpy change (ΔH) = +573 KJ/molChange in entropy (ΔS = +1.64 KJ/mol・K Temperature (T) =?

ΔS = ΔH / T

1.64 = 573 m T

Cross multiply

1.64 × T = 573

Divide both side by 1.64

T = 573 / 1.64

T = 349 K

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The cell membrane is a flexible structure that surrounds both plant and animal cells. The arrangement of molecules within the cell membrane makes it semi-permeable. That is, the cell membrane allows some substances to easily diffuse into and out of the cell, but it prevents the diffusion of other substances.

Plant and animal cell diagram


The cell wall is a rigid structure that surrounds plant cells. The materials found in the cell wall protect the plant cells and give plants structural support.

Which conclusion can be made given the above information?

Answers

Answer:

The true answer is the Cell membrane and animal cells invisible

Explanation: nothing. eshh

what is the volume occupied by 6.8gm of H2S at STP (at mass H=1,S=32)​

Answers

The volume occupied by 17g of H2S at s.t.p. is [H = 1.00, S = 32.0, Molar volume = 22.4 dm3]

Options

A) 11.2dm 3

How many liters of nitrogen gas are needed if 15.9g of aluminum is produced?
please show work

Answers

Answer:

6.6 L    ( if you wrote your Q correctly)

Explanation:

2 Al    + 1 N2   = 2 Al N

Al mole weight = 26.981 gm

   given 15.9 Al    How many L of N2 are needed?

15.9 / 26.981 = .5893 moles of Al

   we need 1/2 as many moles of N2  ( from the balanced equation above)

       = .29465  moles of N2

  22.4 L/ mole   for STP gas = 6.6 L

Breathing is one of the most universal and habitual practices that humans do. Most of the time, we don't even think about it. Our lungs allow us to breathe in air and provide much needed oxygen to the rest of the body. It also eliminates carbon dioxide to get rid of this waste material of our body. This breathing process is made possible because of Boyle's law.

In at most 100- word essay, explain how Boyle's law applies to human breathing apparatus and suggest ways on how to take good care of our healthy lungs.​

Answers

Answer:

lets Do it dude

We can breathe air in and out of our lungs because of Boyle’s law. According to Boyle’s law, if a given amount of gas has a constant temperature, increasing its volume decreases its pressure, and vice-versa.

When you inhale, muscles increase the size of your thoracic (chest) cavity and expand your lungs. This increases their volume, so pressure inside the lungs decreases. As a result, outside air rushes into the lungs. That’s because a gas always flows from an area of higher to lower pressure.

When you exhale, muscles decrease the size of your chest cavity and squeeze your lungs. This decreases their volume, so pressure inside the lungs increases. As a result, air rushes out of the lungs, flowing from an area of higher to lower pressure.

Explanation:

Checkmate

Name the alkyne. Spelling and punctuation count.
CH
C
H3C-CH2-CH2-CH-CH2-CH2-CH2-CH3

Answers

Answer:

[tex] \boxed{ \sf \: 3-propyl-hept-1-yne}[/tex]

Explanation:

To know the name of Alkyne, use IUPAC(International Union of Pure and Applied Chemistry).

According to IUPAC, for the naming of any organic compound containing a triple bond, find the longest chain that contains triple bond & number the chain from the side where triple bond gets lowest number.

in the above diagram, the parent chain cobtains seven carbon atoms with a propyl substituent at 3rd carbon atom. during naming of the compound mention the substituent first along with the position of carbon where is it. Now 7 carbon Atom have prefix (-hept) and Alkyne group is on the first position hence the parent chain would be (hept-1-yne) and substituent (3-propyl).

hence the name of compound is 3-propyl-hept-1-yne

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A 1 kg block of iron sits outside in the direct sun from 8am to 10am. At 8am the temperature of the block was 20.0°C and at 10am the temperature of the block was 27.5°C.
How much heat did the block of Iron absorb from the sun?
use q=mcΔT

Answers

Answer:

About 3.5 kJ.

Explanation:

Recall the heat transfer equation:

[tex]\displaystyle q = mC\Delta T[/tex]

Where q is the heat; m is the mass of the substance; C is its specific heat; and ΔT is the change in temperature.

The given specific heat of iron is 462 J/kg -°C.

Substitute and evaluate. Ensure correct units:
[tex]\displaystyle \begin{aligned} q & = (1\text{ kg})\left(\frac{462\text{ J}}{\text{kg -$^\circ$C}}\right)(27.5\text{ $^\circ$C} - 20.0\text{ $^\circ$C}) \\ \\ & = (1\text{ kg})\left(\frac{462\text{ J}}{\text{kg -$^\circ$C}}\right)(7.5\text{ $^\circ$C}) \\ \\ & = 3.5\times 10^3 \text{ J} = 3.5\text{ kJ}\end{aligned}[/tex]

Therefore, the block of iron absorbed about 3.5 kJ of heat.

specific heat capacity of iron=462J/kg°CChange in temperature=∆T=(27.5-20)=7.5°C

So

Q=mc∆TQ=1(462)(7.5)Q=3500J

The block absorbed 3500J of heat

Name five renewable energy resources.​

Answers

Wind power
Hydro power
Solar power
Biomass
Hydroelectricity

Answer:

Solar energy, geothermal energy. Wind energy. Hydropower, Biomass.

Explanation:

A stock solution has a concentration of 1.5 M SO2 and is diluted to a 0.54 M solution with a volume of 0.18 L. What was the volume of the stock solution

Answers

The volume of the stock solution that has a concentration of 1.5 M SO2 and is diluted to a 0.54 M solution with a volume of 0.18 L is 0.065L.

How to calculate volume?

The concentration of a solution can be calculated using the following formula:

C1V1 = C2V2

Where;

C1 = initial concentration = 1.5MC2 = final concentration = 0.54MV1 = initial volume = ?V2 = final volume = 0.18L

1.5 × V1 = 0.54 × 0.18

1.5V1 = 0.0972

V1 = 0.0972 ÷ 1.5

V1 = 0.065L

Therefore, the volume of the stock solution that has a concentration of 1.5 M SO2 and is diluted to a 0.54 M solution with a volume of 0.18 L is 0.065L.

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Which molecule has a trigonal planar shape?

Answers

Answer:

Structure of boron trifluoride, an example of a molecule with trigonal planar geometry.

Explanation:

1. Marie left her briefcase at home and had to return to get it. At which point did she turn back around to go home? ​

Answers

Answer:

She turned back at the point at which she forgot she left her briefcase. If this isn't the correct answer, please be more specific in the question.

Explanation:

Below is the thermochemical equation for the combustion of octane.



How much heat is released during the combustion of 8 moles of octane (C8H18)

Question 4 options:

Impossible to answer this question with the information provided.


43,764 kilo joules of heat is released


7,004,224 kilo joules of heat is released


2735 kilo joules of heat is released


87,528 kilo joules of heat is released

Answers

from equation 2 moles = - 10,941 kJ

for 8 moles:

8/2 x -10,941 = -43,764 kJ

-43,764 kJ heat is released during the combustion of 8 moles of octane.

How to find the amount of heat released?

To calculate the amount of heat released in a chemical reaction, use the equation Q = mc ΔT, where Q is the heat energy transferred (in joules), m is the mass of the liquid being heated (in kilograms), c is the specific heat capacity of the liquid (joule per kilogram degrees Celsius), and ΔT is the change in temperature.

from equation 2 moles = - 10,941 kJ

for 8 moles:

8/2 x -10,941 = -43,764 kJ

When octane is burned, carbon dioxide gas is generated, as shown in the reaction equation. This is typical of hydrocarbon combustion reactions, such as octane and propane.

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HELP ME OUT PLS!!!!!!

During which lunar phase would you observe the highest tides?

A) Phase 1

B) Phase 2

C) Phase 3

D) Phase 4​

Answers

Answer:

3

Explanation:

This is the answer because when it is full moon the tides are higher.

C- phase 3 which I’m assuming is a full moon phase
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How might a living and a nonliving element in a forest interact?A deer eating the leaves from small bushesB a bird building a nest in a treeC a bear living in a hollowed-out logD a hawk scooping up a snake to eat *NEED HELP I WILL GIVE BRAINLIEST FOR BEST ANSWER PLEASE HELP ME*A cylinder has a height of 9 meters and a diameter of 36 meters. What is its volume? Use 3.14 and round your answer to the nearest hundredth.______cubic meters What is memory recall When coal burns, the reactionA. releases heat and is endothermic.B. releases heat and is exothermic.C. absorbs heat and is endothermic.D. absorbs heat and is exothermic PLSS HELP ME I WILL GIVE BRAINLIEST :'(2.- Identify the problem with this sentence: 'If I were rich, I will buy a giant mansion.'A) It shifts from the imperative mood by using the verb 'were' to the indicative mood by using 'will buy'.B) It shifts from the subjunctive mood by using the verb 'were' to the imperative mood by using 'will buy'.C) It shifts from the indicative mood by using the verb 'were' to the subjunctive mood by using 'will buy'.D) It shifts from the subjunctive mood by using the verb 'were' to the indicative mood by using 'will buy'.E) There is nothing wrong with this sentence. It is correct as is. 25 points!Find the value of X. Invasive species, deforestation, and eutrophication are all types of. Question 1 options:Natural (nature-made) environmental changesMan-made environmental changesBoth nature and man-madeNeither nature nor man-made Add or remove commas, if necessary, until the sentence has correct punctuation.Lexie Grey plans to write a song swim withdolphins and visit an active volcano before hernext birthday. What does the term overharvesting mean in your own words? What is sine in geometry for a right triangle 4. When I graduate I want to go to college, but first I want to travel.A: SimpleB. Compound C: Complex D: Compound-Complex Use the scenario to answer the question. One variable increases, then the other increases, as well. Which term would best describe this scenario?1. Hypothesis2. Causation3. Transitional form4. Positive correlation Someone help me with this plsssssss."A shipping container will be used to transport several 100-kilogram crates across the country by rail. The greatest weight that can be loaded into the container is 24500 kilograms. Other shipments weighing 9100 kilograms have already been loaded into the container. Use the drop-down menu below to write an inequality representing cc, the total number of 100-kilogram crates that can be loaded into the shipping container." Hillary can read 560 words in 7 minutes. How many words can Hilary read in 20 minutes? 1 pound = 16 ouncesSolution: ____ ounces The monoamine hypothesis of depression proposes that:. 2. Which is not an example of diffusion? What were some problems veterans (soldiers) had after the war? can someone help me figure out what 9.2x10^3 is In ecological succession, what would most likely come first when forming an established ecosystem large herbivores or higher order carnivores ?