Write a scientific explanation that answers the following question: Is matter conserved during a
chemical reaction in both closed and open systems?
Claim:
Evidence:
Reasoning:

Write A Scientific Explanation That Answers The Following Question: Is Matter Conserved During Achemical

Answers

Answer 1
Claim is : chemical reactions are smaller
Answer 2

Answer:

Matter is conserved during all chemical reactions because matter cannot be created or destroyed.

Explanation:


Related Questions

Which compound contains three elements?
A. Aluminium chloride
B. iron(III) oxide
C. potassium oxide
D. sodium carbonate

Answers

Answer:

Sodium Carbonate

Explanation:

Sodium carbonate is made of three elements, that are, sodium, carbon and oxygen.

Its formula is Na2CO3.

Hope it helps:)

Use mass-mass calculation, determine how many grams of sodium chloride SHOULD have been produced from the amount of sodium bicarbonate in mass (B.)

Answers

Answer:

where is the question???

In what direction does thermal energy transfer?

Answers

Answer:

Either direction

Explanation:

If you cook food it would go from cold to hot. If you were to put a drink in the fridge it would go from hot to cold. So it is either direction.

Consider the reaction, C2H4(g) + H2(g) - C2H6(8), where AH = -137 kJ. How many kilojoules are released when 3.5 mol of CH4
reacts?
480 kJ are released
20 x 103 kJ are released
570 kJ are released
137 kJ are released​

Answers

Answer: 480 kJ of energy is released when 3.5 mol of [tex]C_2H_4[/tex] reacts.

Explanation:

The balanced chemical reaction is:

[tex]C_2H_4(g)+H_2(g)\rightarrow C_2H_6(g)[/tex]  [tex]\Delta H=-137kJ[/tex]

Thus it is given that the reaction is exothermic (heat energy is released) as enthalpy change for the reaction is negative.

1 mole of [tex]C_2H_4[/tex] on reacting gives = 137 kJ of energy

Thus 3.5 moles  of [tex]C_2H_4[/tex] on reacting gives = [tex]\frac{137}{1}\times 3.5=480 kJ[/tex] of energy

Thus 480 kJ of energy is released when 3.5 mol of [tex]C_2H_4[/tex] reacts.

2. A 0.45g sample of mineral ore is analyzed for chromium and found to contain
0.560mg Cr2O3. Express the concentration of Cr2O3 in the sample as:
(a) Percent (%)
(b) Parts per thousand (ppt)
(c) Parts per million (ppm)
(d) Parts per billion (ppb)​

Answers

Answer:

Explanation: I don't know

What is the highest occupied level of Carbon

Answers

Answer:

Highest occupied level of carbon is 3

Explanation:

its called Alkynes

Explanation:

4

trust me!

#carryonlearning❤

A chemist needs to determine the concentration of a solution of nitric acid, HNO3. She puts 905 mL of the acid in a flask along with a few drops of indicator. She then slowly adds 0.200 M Ba(OH)2 to the flask until the solution turns pink, indicating the equivalence point of the titration. She notes that 235 mL of Ba(OH)2 was needed to reach the equivalence point.

Required:
a. How many moles of Ba(OH)2 are present in 225 mL of 0.200 M Ba(OH)2?
b. How many moles of HNO3 are present if 4.50 x 10^2 mol of Ba(OH)2 was needed to neutralize the acid solution? (Express your answer numerically in moles)

Answers

Answer:

See explanation

Explanation:

The equation of the reaction is;

2HNO3(aq) + Ba(OH)2(aq) -------->Ba(NO3)2(aq) + 2H2O(l)

a) The number of moles of  Ba(OH)2  = 225/1000 *  0.200

= 0.045 moles

From the reaction equation;

2 moles of HNO3 require 1 mole of  Ba(OH)2

x moles of HNO3 require 4.50 x 10^2 mol of Ba(OH)2

x = 4.50 x 10^2 * 2/1

x = 9  x 10^2 moles of HNO3

Is a cold and b is warm? Please help

Answers

Answer:

Label A shows cold area on the mug, while label B shows a warm area.

Explanation:

Have a good day

Need help is label a warm area or is b Orr are they both warm

Answers

Answer:

your image is a blavk screen so we cant tell

Explanation:

Use the Gizmo to mix 200 g of copper at 100 °C with 1,000 g of water at 20 °C. Record the data and calculated answers for copper in the 2 tables below. Accepted values for % error calculations can be found below these 2 tables.

DATA
Copper
Lead
Mass of Metal




Initial Temperature of Metal




Mass of Water




Initial Temperature of Water




Final Temperature of Water






CALCULATIONS
Copper
Lead
Temperature Change of Water




Heat Gained by Water




Heat Lost by Metal




Temperature Change of Metal




Specific Heat of Metal




% Error






Use the Gizmo to mix 200 g of lead at 100 °C with 1,000 g of water at 20 °C. Record the data and answers to the calculations for lead in the 2 tables above.

Metal
Accepted Specific Heat (J/g⁰C)
aluminum
0.900
lead
0.160
copper
0.385
tin
0.228
steel
0.460


Insert a picture of your work for the calculations table here.

Answers

Answer:

Explanation:Use the Gizmo to mix 200 g of copper at 100 °C with 1,000 g of water at 20 °C. Record the data and calculated answers for copper in the 2 tables below. Accepted values for % error calculations can be found below these 2 tables.

DATA

Copper

Lead

Mass of Metal

How many joules of energy are required to vaporize 13.1 kg of lead at its normal boiling point?

Answers

Answer: 1123000 Joules of energy are required to vaporize 13.1 kg of lead at its normal boiling point

Explanation:

Latent heat of vaporization is the amount of heat required to convert 1 mole of liquid to gas at atmospheric pressure.

Amount of heat required to vaporize 1 mole of lead =  177.7 kJ

Molar mass of lead = 207.2 g

Mass of lead given = 1.31 kg = 1310 g       (1kg=1000g)

Heat required to vaporize 207.2 of lead = 177.7 kJ

Thus Heat required to vaporize 1310 g of lead =[tex]\frac{177.7}{207.2}\times 1310=1123kJ=1123000J[/tex]

Thus 1123000 Joules of energy are required to vaporize 13.1 kg of lead at its normal boiling point

What was the purpose of letting the transformed cells sit in LB for a few minutes before spreading them onto the plates?

A. This allows time for the cells to express the antibiotic resistance gene

B. This allows the cells to take up the plasmid after the heat shock procedure

C. This allows time for the cells to warm up before plating

D. This allows cells time to start glowing green

Answers

I think c ... C this is the correct

I will mark brainliest plz help me!!!
What kind of weather forms with an occluded front?

Answers

Occluded fronts usually form around areas of low atmospheric pressure.
There is often precipitation along with the occluded front with clouds.

suppose you are analyzing an antacid that contains Mg(OH)2 and Al(OH)3 in a 1:1 molar ratio. The antacid was neutralized with an excess of 0.500 M HCl, and the excess HCl was then back titrated with 0.500 M NaOH. The following data was obtained: Volume of 0.500 M HCl utilized: 38.25 mL Volume of 0.500 M NaOH utilized: 3.60 mL Calculate the masses of Mg(OH)2 and Al(OH)3 contained in the antacid.

Answers

Answer:

0.202g of Mg(OH)₂ and 0.270g of Al(OH)₃

Explanation:

The OH⁻ ions of the Mg(OH)2 and Al(OH)3 reacts with the HCl. The HCl in excess reacts with the NaOH. To solve this question we must find the moles of HCl that react in the beginning with the antiacid and as the ratio is 1:1 we can find the moles of Mg(OH)2 and Al(OH)3. The reactions are:

OH⁻ + HCl → Cl⁻ + H₂O

HCl + NaOH → NaCl + H₂O

Moles HCl added:

0.03825L * (0.500mol / L) = 0.019125 moles

Moles NaOH utilized:

0.0036L * (0.500mol / L) = 0.0018 moles

Moles HCl that react = Moles OH⁻ in the antiacid

0.019125 moles - 0.0018moles =

0.017325 moles OH⁻ in the antiacid

As the ratio is 1:1. the moles Mg(OH)2 = Moles Al(OH)3

And these 5 hydroxides produce 0.017325 moles:

5X = 0.017325 moles

X = 3.465x10⁻³ moles

Where X are moles of both Mg(OH)2 and Moles Al(OH)3

Mass -Molar mass: 58.3197 g/mol-:

3.465x10⁻³ moles * (58.3197g/mol) =

0.202g of Mg(OH)₂

And

Mass -Molar mass: 78g/mol-:

3.465x10⁻³ moles * (78g/mol) =

0.270g of Al(OH)₃

A reaction was experimentally determined to follow the rate law, Rate = k[A] where k = 0.15 s-1. Starting with [A]o = 0.225M, how many seconds will it take for [A]t = 0.0350M?

Answers

Answer:

The time the reaction takes is 12.4s

Explanation:

A reaction that follows the rate law:

Rate =k[A] is order 1 and follows the equation:

Ln[A] = -kt + ln[A]₀

Where [A] is concentration of the reaction after time t: 0.0350M

k is rate constant = 0.15s⁻¹

t is time in seconds

[A]⁰ is initial concentration = 0.225M

Ln[0.0350] = -0.15s⁻¹*t + ln[0.225]

-1.86075 =  -0.15s⁻¹*t

12.4s = t

The time the reaction takes is 12.4s

Which of these would a mechanical engineer do?

Answers

Answer:

I dont see the answers

Explanation:

BIOCR
1 Co
> Co

Answer the question below. Use the rubric in the materials for help if needed.
>
Describe the process used to determine how many atoms of each element are in 2Ca3(PO4)2. Show all
your work.

Answers

Answer:

Six atoms of calcium, four of phosphorous and sixteen of oxygen for a total of twenty six

Explanation:

Hello there!

In this case, according to the molecular formula of the two moles of calcium phosphate:

[tex]2Ca_3(PO_4)_2[/tex]

Thus, in order to calculate the atoms of each atom, it is necessary to multiply the two in front of the formula by the subscripts in the reaction:

[tex]atoms Ca=2*3=6\\\\atoms P=2*2=4\\\\atoms O=2*2*4=16[/tex]

Thus, we obtain six atoms of calcium, four of phosphorous and sixteen of oxygen for a total of twenty six.

Best regards!

What can you infer about the air pressures over the land and ocean? Explain your answer.


Answers

Answer:

Answer: During the day, the sun heats up both the ocean surface and the land. ... The wind will blow from the higher pressure over the water to lower pressure over the land causing the sea breeze. The sea breeze strength will vary depending on the temperature difference between the land and the ocean.

Explanation:

The air temperature in a sealed, insulated box.. 20°C An ice cube at O'C is
placed in the box where it slowly melts. How and why does the melting of the ice
affect the air temperature in the box?

Melting is endothermic so the air temperature increases

Melting is exothermic, so the air temperature decreases


Melting is endothermic, so the air temperature decreases

Melting is exothermic, so the air temperature increases

Answers

Answer:

Melting is endothermic, so the air temperature decreases.

Explanation:

Hello there!

In this case, according to the given statement, it is possible to infer that the ice is melt because energy is applied to the ice and thereafter its temperature increases; this is possible because the joined particles of a solid substance need energy to undergo such a separation that they become more far away to each other and therefore transcend to the liquid phase due to the new molecules arrangement. Thus, the answer is Melting is endothermic, so the air temperature decreases because as the ice heats up, the air cools down as it gives it energy to the ice.

Best regards!

What's a household item that has  electrical energy

Answers

Answer:

Washing machine.

Dryer.

Television.

Cell phone.

Explanation:

Answer:

Washer and dryer, TV, Cell phone

Explanation:

How many moles are in 6 x 10^23 molecules of H2O

Answers

One mole represents 6.022∙1023 separate entities, just like one dozen represents 12 objects. So, if there are 6.022∙1023 H2O molecules, that is the same as one mole of water.

What causes the lines in the spectrum for elements

Answers

They have to connect atoms to cause a chemical reaction

Which of the following would be considered renewable resources? You may choose more than one.


oil

corn

clean air

forests

Answers

Answer:

clean air

Explanation:

someone already answer but clean air

1.20×10−8s to nanoseconds

Answers

Answer:

There are 12 nanoseconds in [tex]1.2\times 10^{-8}\ s[/tex].

Explanation:

We need to convert [tex]1.2\times 10^{-8}\ s[/tex] to nanoseconds.

We know that,

[tex]1\ s=10^9\ ns[/tex]

Now using unitary method to solve it such that,

[tex]1.2\times 10^{-8}\ s=1.2\times 10^{-8}\ \times 10^9\\\\=1.2\times 10\\\\=12\ ns[/tex]

So, there are 12 nanoseconds in [tex]1.2\times 10^{-8}\ s[/tex].

A 38.22 mL aliquot of weak acid that has a concentration of 0.882 M will be titrated with 0.289 M NaOH. Calculate the pH of of the solution upon neutralization of half of the weak acid. The Ka of the acid is 6.8×10-7.

Answers

Answer:

pH = 6.167

Explanation:

The weak acid, HX, reacts with NaOH as follows:

HX + NaOH → NaX + H₂O

Where 1 mole of HX with 1 mole of NaOH produce 1 mole of NaX (The conjugate base of the weak acid).

Now, using H-H equation:

pH = pKa + log [NaX] / [HX]

Where pH is the pH of the buffer

pKa is -log Ka = 6.167

And [NaX] [HX] are the molar concentrations of each specie

Now, at the neutralization of the half of HX, the other half is as NaX, that means:

[NaX] = [HX]

And:

pH = pKa + log [NaX] / [HX]

pH = 6.167 + log 1

pH = 6.167

I need help pls!!!!

Answers

Answer:

A

Explanation:

jsgsnsbnss care about explaimi

Glucose and alcohol Contain hydrogen
but they are not adds Why?​

Answers

Answer:

Ans. Alcohols and glucose though contain hydrogen but do not ionise in the solution to produce H+ ions. This is proved by the fact that there solutions do not conduct electricity.

A gas cylinder is filled with 5.50 moles of oxygen gas at 83°C. The piston is compressed to yield a pressure of
400.0 kPa. What is the volume inside the cylinder?

Answers

Answer:

volume=0.04322m3

Explanation:

acording to ideal gas equation that PV=nRT

Is lighting a match a chemical change?

Answers

Answer:

yes

Explanation:

Lighting a match and letting is burn is an example of a chemical change.

Matches use sulfur, phosphate and a friction agent held together by a binding agent. Together, the oxygen and sulfur burn slowly, igniting the wood of the match for a flame that lasts long enough to see by, light a candle or ignite a campfire.

The half-life of argon-39 is 269 years. It decays into krypton-39. After 1,076 years, what fraction of the original amount of argon-
1/16
1/4
1/2
1/8

Answers

Answer:

The correct answer is - 1/16.

Explanation:

The half-life is the time that is required to decay nuclei to the half amount of its original amount in a radioactive sample. It is represented by the t1/2. The time that is required to reduce to half of its initial value is known as the half-life of a particular sample.

Half-life of argon-39 = 269 years

total time is taken in complete decay = 1076 years

Number of half-lives required = 1076/269

= 4

So the original amount of the sample = (1/2)^n

n = number of half-life

= 1/2^4

= 1/16

The correct answer is = 1/16

Other Questions
summary of alice in the wonderland 100 POINTS!!!!!has to include; The title of your novel.The main characters.The main conflict.As much as of the plot as you can: setting, rising action, climax, falling action, resolution Economy of the south HELP WILL GIVE BRANLIEST!No links!! 38. The rate of soil development in tropical areas isusually greater than the rate of soil development inarctic areas because tropical areas haveA) less chemical weathering and a scarcity ofliving organismsB) less chemical weathering and an abundance ofliving organismsC) more chemical weathering and a scarcity ofliving organismsD) more chemical weathering and an abundance ofliving organisms 5. Find the surface area of the prism.13 cm5 cm4 cm12 cm What is the volume of the cone?Use 3.14 for , and round to the nearest tenth. A water spout is filling a large container with water. After 5 hours the container held 24L of water. After 8 hours the container held 30L of water. At this rate, how much water was in the container at 2 hours? Research the facts of UAEs size and location and compare with India and use a Map for comparison. During which eon did Pangaea come together?ArcheanHadeanPhanerozoicProterozoic This is relative frequency table. Can someone help? You now need to refer only to Source B from lines 4 - 18 How does the writer use language to describe Boston and its atmosphere?SOURCE B IS BELOWBOSTON by Charles DickensDickens has been travelling around the USA and has written this travel log about his experiences.To return to Boston. When I got into the streets upon this Sunday morning, the air was so clear, the houses were so bright and gay: the signboards were painted in such gaudy colours; the gilded letters were so very golden; the bricks were so very red, the stone was so very white, the blinds and area railings were so very green, the knobs and plates upon the street doors so marvellously bright and twinkling; and all so slight and unsubstantial in appearance - that every thoroughfare in the city looked exactly like a scene in a pantomime. It rarely happens in the business streets that a tradesman, if I may venture to call anybody a tradesman, where everybody is a merchant, resides above his store; so that many occupations are often carried on in one house, and the whole front is covered with boards and inscriptions. As I walked along, I kept glancing up at these boards, confidently expecting to see a few of them change into something; and I never turned a corner suddenly without looking out for the clown and pantaloon, who, I had no doubt, were hiding in a doorway or behind some pillar close at hand. As to Harlequin and Columbine, I discovered immediately that they lodged (they are always looking after lodgings in a pantomime) at a very small clockmaker's one story high, near the hotel; which, in addition to various symbols and devices, almost covering the whole front, had a great dial hanging out - to be jumped through, of course.The suburbs are, if possible, even more unsubstantial-looking than the city.The white wooden houses (so white that it makes one wink to look at them), with their green jalousie blinds, are so sprinkled and dropped about in all directions, without seeming to have any root at all in the ground; and the small churches and chapels are so prim, and bright, and highly varnished; that I almost believed the whole affair could be taken up piecemeal like a child's toy, and crammed into a little box.The city is a beautiful one, and cannot fail, I should imagine, to impress all strangers very favourably. The private dwelling-houses are, for the most part, large and elegant; the shops extremely good; and the public buildings handsome. The State House is built upon the summit of a hill, which rises gradually at first, and afterwards by a steep ascent, almost from the water's edge. In front is a green enclosure, called the Common. The site is beautiful: and from the top there is a charming panoramic view of the whole town and neighbourhood. In addition to a variety of commodious offices, it contains two handsome chambers; in one the House of Representatives of the State hold their meetings: in the other, the Senate. Such proceedings as I saw here, were conducted with perfect gravity and decorum; and were certainly calculated to inspire attention and respect.There is no doubt that much of the intellectual refinement and superiority of Boston, is preferable to the quiet influence of the University of Cambridge, which is within three or four miles of the city. The resident professors at that university are gentlemen of learning and varied attainments; and are, without one exception that I can call to mind, men who would shed a grace upon, and do honour to, any society in the civilised world. Many of the resident gentry in Boston and its neighbourhood, and I think I am not mistaken in adding, a large majority of those who are attached to the liberal professions there, have been educated at this same school. Whatever the defects of American universities may be, they disseminate no prejudices; rear no bigots; dig up the buried ashes of no old superstitions; never interpose between the people and their improvement; exclude no man because of his religious opinions; above all, in their whole course of study and instruction, recognise a world, and a broad one too, lying beyond the college walls. how did ben Franklin die Based on the information you were just given, which statement would make the best topic sentence for an essay about industrialization? Industrialization had negative effects on the environment. O Industrialization led to more people manufacturing products at home. O. Industrialization increased the price of many products. O. Industrialization changed the way goods were produced. 2. Ella enter answermuchos museos y yoenter answermuchos clubs. The Wolf in Sheeps ClothingA Wolf found great difficulty in getting at the sheep, given the watchfullness of the shepherd and his dogs. But one day, it found the skin of a sheep that had been flayed and thrown aside. He put it on over his own fur (so he looked just like a sheep) and strolled down among the sheep. The Lamb that belonged to the Sheep, whose skin the Wolf was wearing, began to follow the Wolf in the Sheep's clothing; so, leading the Lamb a little apart, he soon made a meal off her, and for some time he succeeded in deceiving the sheep, and enjoying hearty meals.Theme: Appearances can be deceiving.Read the fable closely and observe how the story reveals the theme. Think of an example from a TV show, book, or movie in which a character learns the same lesson communicated through this fable. Write a complete paragraph of at least five original sentences that explains how the fable and your story reveal the same theme.Use specific details from each story in your paragraph. Explain how your story choice makes the theme in the fable more modern or new. Which salt is most soluble at 10C? Claire is writing a post about saving honeybees for a sustainable farming organizations blog. What can she use as a hook in her post? -4x + 7y = 20 y= 3x + 15 Question 11(Multiple Choice Worth 1 points)(08.06 MC)The following data shows the weight, in pounds, of 5 boxes:3, 1, 2, 2, 2What is the value of the mean absolute deviation of the weight of the boxes, and what does it represent about the weight of a box?(A.) 0.4 pound; on average, the weight of a box varies 0.4 pounds from the mean of 2 pounds(B.) 0.8 pound; on average, the weight of a box varies 0.8 pounds from the mean of 2 pounds(C.) 0.4 pound; the weight of 50% of the boxes is greater than 0.4 pound(D.) 0.8 pound; the weight of 50% of the boxes is greater than 0.8 pound Are the cylinders similar? Why or why not?