Can matter every be destroyed? Why or why not?

Answers

Answer 1

Hey

Matter can neither be created nor destroyed.

Explanation:

This is the law of conservation of matter (mass). One can prove this by performing a simple experiment at home.

Have a great day


Related Questions

What mass of chromium would be produced from the reaction of 57.0 g of potassium with 199 g of chromium(II) bromide according to the following reaction? 2 K + CrBr2 2 KBr + Cr *

Answers

Answer:

38g of Cr

Explanation:

Step 1:

The balanced equation for the reaction:

2K + CrBr2 —> 2KBr + Cr

Step 2:

Determination of the masses of K and CrBr2 that reacted and the mass of Cr produced from the balanced equation.

This is illustrated below:

Molar mass of K = 39g/mol

Mass of K from the balanced equation = 2 x 39 = 78g

Molar Mass of CrBr2 = 52 + (80x2) = 212g

Mass of CrBr2 from the balanced equation = 1 x 212 = 212g

Molar Mass of Cr = 52g/mol

Mass of Cr from the balanced equation = 1 x 52 = 52g

From the balanced equation above,

78g of K reacted with 212g of CrBr2 to produce 52g of Cr.

Step 3:

Determination of the limiting reactant.

This is illustrated below:

From the balanced equation above,

78g of K reacted with 212g of CrBr2.

Therefore, 57g of K will react with = (57 x 212)/78 = 154.92g of CrBr2.

From the above calculation, we can see that a lesser mass (i.e 154.92g) than what was given ( i.e 199g) of CrBr2 is needed to react completely with 57g of K. Therefore, K is the limiting reactant and CrBr2 is the excess reactant.

Step 4:

Determination of the mass of Cr produced by the reaction.

In this case, the limiting reactant will be use because it will give the maximum yield of Cr as all of it is used up in the reaction process. The limiting reactant is K and the mass of Cr produced is obtained as follow:

From the balanced equation above,

78g of K reacted to produce 52g of Cr.

Therefore, 57g of K will produce = (57 x 52)/78 = 38g of Cr.

Therefore, 38g of Cr is produced from the reaction.

what started the wildfires

Answers

Answer:

It is a typical fires that started out of a lightning strike, or people carelessly starting it, or accidentally, or even arson, that went un-noticed and got out of hand.

Answer:

Explanation:

Forest fires always start by one of two ways - naturally caused or human caused. Natural fires are generally started by lightning, with a very small percentage started by spontaneous combustion of dry fuel such as sawdust and leaves. On the other hand, human-caused fires can be due to any number of reasons.

Which one is it? Please help

Answers

Chemical properties can only be tested if you change the substance

Answer:

Chemical properties can be tested without changing the substance

Explanation:

Which 1.0 M solution has the lowest pH?

A.
HCN

B.
H3PO4

C.
H2C2O4

D.
HCl

Answers

The correct answer to this question is c

what 3 classes of compounds are elecrolytes

Answers

Answer:

i believe it is strong acids, strong bases, and salts.

Explanation:

Hope this helps : )

What are some true statements about light​

Answers

Answer:It allows us to see things so we know where we are going that’s why at night we had lamp posts

Explanation:

Why does dew form on the outside of your glass filled with ice cold water?

Answers

when the warm air hits the cold surface, it reaches dew point causing condensation

If the following weights have masses of 2, 4, 6 and 8 kg,
respectively, and they are at the same temperature, which one
will transfer more heat if they are all placed in cold water to
cool down? Explain.

Unit is calorimetry

Answers

Answer:

8 kg mass

Explanation:

As we can see in the image the weight of mass 8 kgs has a large surface area as compared to the surface area of other masses. In general, it has been observed that a wide surface area has more surface particle for heat conduction. Hence, the rate of heat transfer is directly proportional to the surface area of heat conducting surface. Thus, the larger the surface area, the faster is the rate of heat conduction.

Hence, weight of mass 8Kg wil transfer heat a fast rate.

1 point
If the pressure in a cylinder is 1 atm and the volume is 0.725 liters, then
what is the pressure when the volume is decreased to .075 liters (at
constant temperature)? *
2.5 atm
5 atm
5 atm
9.7 atm
O
13.2 atm

Answers

Answer:

9.7 atm.

Explanation:

The following data were obtained from the question:

Initial pressure (P1) = 1 atm

Initial volume (V1) = 0.725 L

Final volume (V2) = 0.075 L

Final pressure (P2) =?

The final pressure can be obtained by using the Boyle's law equation since the temperature is constant. This is illustrated below:

P1V1 = P2V2

1 x 0.725 = P2 x 0.075

Divide both side by 0.075

P2 = 0.725 / 0.075

P2 = 9.7 atm.

Therefore, the new pressure is 9.7 atm.

46g of a mineral contained 16g copper, 14g iron and 16g sulphur. Calculate the empirical
formula of the mineral.

Answers

Answer:

CuFeS2

Explanation:

Calculate the moles of each substance by doing moles= mass/relative atomic mass. you should get 0.25 moles of copper and iron and 0.5 moles of sulfur. Then divide all of those numbers by 0.25 (as its the lowest value) you should get 1 for copper and iron and 2 for sulfur. This represents the ratio that they are in within the mineral.

How many milliliters of 0.2 M NaOH are required to exactly neutralize 40 milliliters of 0.1 M HCl?

A) 10
B) 20
C) 40
D) 80

Answers

Answer:

Option B. 20mL

Explanation:

Step 1:

Data obtained from the question.

Volume of base (Vb) =..?

Molarity of base (Mb) = 0.2M

Volume of acid (Va) = 40mL

Molarity of acid (Ma) = 0.1M

Step 2:

The balanced equation for the reaction.

HCl + NaOH —> NaCl + H2O

From the balanced equation above, the following were obtained:

Mole ratio of the acid (nA) = 1

Mole ratio of the base (nB) = 1

Step 3:

Determination of the volume of base, NaOH needed for the reaction. This is illustrated below:

MaVa/MbVb = nA/nB

0.1 x 40 / 0.2 x Vb = 1

Cross multiply

0.2 x Vb = 0.1 x 40

Divide both side by 0.2

Vb = 0.1 x 40 / 0.2

Vb = 20mL

Therefore, the volume of the base is 20mL.

The pressure of a gas in a cylinder when it is heated to a temperature of 250k is 1.5 atm. What was the initial temperature of the gas if it’s initial pressure was 1 atm?

Answers

Answer:

[tex]T1=166.66K[/tex]

Explanation:

According to Gay-Lussac’s law simply states that the ratio of the initial pressure and temperature is equal to the ratio of the final pressure and temperature for a gas of a fixed provided that the mass is kept at a constant volume.

Given:

Initial pressure, P1 = 1 atm

Final pressure, P2 = 1.5 atm

Final temperature, T2 = 250 K

The law can be applied using the below formula

P1T2 = P2T1

Then,

T1 = (P1T2)/P1 = (1*250)/(1.5) = 166.66 Kelvin.

[tex]T1=166.66K[/tex]

:

Answer:

[tex]T_1=166.7K[/tex]

Explanation:

Hello,

In this case, by applying the Gay-Lussac's law which help us to understand the pressure-temperature gas behavior via a directly proportional relationship:

[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2}[/tex]

In such a way, as we are asked to compute the initial temperature knowing the initial pressure and final both temperature and pressure, so we solve for it:

[tex]T_1=\frac{T_2P_1}{P_2}=\frac{250K*1atm}{1.5atm} \\\\T_1=166.7K[/tex]

Best regards.

What type of elements are ionic bonds composed of?

Answers

Answer:

A metal and a nonmetal

Explanation:

Picture NaCl, the most famous example of an ionic compound. Two ions, Na+ (sodium) and Cl- (chlorine) are joined by an ionic bond.

Sodium, the metal, gives up an electron to chlorine.

Chlorine, the nonmetal, accepts an electron from sodium.

That way both have 8 electrons in their outer shell! This is the way ionic bonds function.

I have 345mL of a 1.5M NaCl solution. If I boil the water until the volume of the solution is 250mL, what will the molarity of the solution be?

A. 28.5M
B. 1.07M
C. 2.07M
D. 1.5M

Answers

Answer is
C. 2.07 M


For explanation

M1V1 = M2V2

M2 = (M1V1)/V2

M2 = (1.5M x 345ml) / 250 ml

:. M2 = 2.07 M

One of the biggest news stories of 1996 was the successful cloning of Dolly the sheep. Dolly was the first mammal cloned from an adult body cell. At first, Dolly appeared to be perfectly healthy. However, she died at age 6 of cancer. Dolly’s early death made scientists wonder whether cloned animals age faster than normal. A small flock of sheep cloned from Dolly have been observed since 2007. Happily, these clones show no sign of early aging. Choose the best option to complete the sentence. Scientists worried that cloned animals would age rapidly because their cells contain __________________ as old as the individual they were cloned from.

Answers

Answer:

I believe the answer you're looking for is DNA, not sure though

what is the correct formula for the compound platinum (vi) flouride?

Answers

Answer: PtF6

Explanation:  is one of seventeen known binary hexafluorides.

If I add water to 100mL of a 0.15M NaOH solution until the final volume is 150mL, what will the molarity of the diluted solution be?

A. 0.100M
B. 1.2M
C. 0.01M
D. 52.8M

Answers

Answer : A

0,15 moles of NaOH -------in-------1000ml

x moles of NaOH ---------in-------100ml

x= 0,015 moles of NaOH

final volume =150ml

0,015 moles of NaOH -------in------150ml

x moles of NaOH ------in--------1000ml

x= 0,1 moles of NaOH

HELPPPP PLEASEEEE NAME THESE MOLECULES PLEASEEE

Answers

Answer:

1. carboxylic acid

2. ether

3. aldehyde

4. ketone

5. amine

6. alcohol

Explanation:

Know the functional groups. If you would like me to teach you them let me know.

- Hope that helps! Please let me know if you need further explanation.

How many grams of H20 will be formed when 32.0 g H2 reacts with 16.0 g
O2? *
2H2 + O2 + 2H2O
9.00 g
16.0 g
18.0 g
32.0g

Answers

Answer:

18.0 g

Explanation:

M(H2) = 2.0 g/mol

32.0g * 1 mol/2 g= 16 mol H2

M(O2) = 32 g/mol

16.0 g * 1mol/32 g= 0.5 mol O2

                                      2H2 + O2 ---> 2H2O

from reaction              2 mol    1 mol

given                         16 mol     0.5 mol

We see that O2 is a limiting reactant.

                                    2H2 + O2 +-------> 2H2O

from reaction                         1 mol            2 mol

given                                      0.5 mol        x mol

x =(0.5*2)/1= 1 mol H2O

M(H2O)= 18 g/mol

18 g/mol* 1 mol = 18 g H2O

Is the same reactant always the limiting reactant?

Answers

No because the limiting reactant is determined by calculating the amount of product therefore the limiting reactant will not be the same for a given reaction

In CaSO4, the oxidation number of Ca is
that of S is
and that of O is

Answers

Answer: In CaF2, the oxidation number of Ca is +2

, and that of F is -1

. In H2SO4, the oxidation number of H is +1

, that of S is +6

, and that of O is -2

. In CaSO4, the oxidation number of Ca is +2

, that of S is +6

, and that of O is -2

. In HF, the oxidation number of H is +1

, and that of F is -1

Most solutions are ___ solutions.

A heterogeneous
B saturated
C static
D unsaturated​

Answers

Answer:

the answer is A heterogeneous solutions

Explanation:

Mixtures in two or more phases are heterogeneous mixtures. Examples include ice cubes in a drink, sand and water, and salt and oil. The liquid that is immiscible form heterogeneous mixtures. A good example is a mixture of oil and water.Jun 26, 2019

mutations that neither benefit nor harm the organism have (blank) effect on the organisms survival

Answers

Answer:

I would say that the mutation has no effect on the organism, as it doesn't help or harm it.

hope this helps :)

Explanation:

Answer:

its a neutral

Explanation:

i did the test

In general, when a substance changes from a solid to a liquid,
A.
the density of the substance increases.
B.
the substance no longer has density since density is a property only solids have.
C.
the density of the substance decreases.
D.
the density of the substance remains the same.

Answers

Answer:

c,density is the measure of compactness in a substance. Liquid particles are close together however they aren't as close as the particles in solids.

What is the oxidation half-reaction for this unbalanced redox equation? cr2o72– + fe2+ → cr3+ + fe3+ cr3+ → cr2o72– cr2o72– → cr3+ fe3+ → fe2+ fe2+ → fe3+?

Answers

Answer:

6Fe^2+(aq) -------> 6Fe^3+(aq) + 6e

Explanation:

The balanced oxidation half equation is;

6Fe^2+(aq) -------> 6Fe^3+(aq) + 6e

A redox reaction is actually an acronym for oxidation-reducation reaction. Since the both reactions are complementary, there can't be oxidation without reduction and there can't be reduction without oxidation.

The main characteristic of redox reactions is that electrons are transferred in the process. The number of electrons transferred is usually deduced from the balanced reaction equation. For this reaction, the balanced overall reaction equation is;

Cr2O7^2–(aq) + 6Fe^2+(aq) +14H^+(aq)→ 2Cr^3+(aq) + 6Fe^3+ (aq) + 7H2O(l)

It is clear from the equation above that six electrons were transferred. Thus six Fe^2+ ions lost one electron each in the oxidation half equation as shown in the balanced oxidation half equation above.

In the graph above for the dissociation of a strong acid, why do the bars for H3O+ and A- have the same height as the bar for HA?

Answers

Answer:

The concentration of HA is the same as concentration of H3O+ and A- produced.

Explanation:

The dissociation equation is given below:

HA(aq) + H2O (l) —> H3O+(aq) + A-(aq)

From the reaction above, we can see that the acid is monoprotic acid i.e it has only 1 ionisable hydrogen atom.

Now, from the balanced equation, we can see that the acid produced equal concentration of H3O+ and A-.

This account for the reason why the bars for H3O+ and A- have the same height as the bar for HA.

In most mirrors, the virtual image appears to come from behind the mirror. True False

Answers

Answer

False

Explanation:

Using the equation below, calculate the approximate moles of oxygen gas (O2) required to completely react with 719.68 moles of aluminum (Al). 4Al (s) + 3O2(g) -----> 2Al2O3(s)

Answers

Answer:

539.76 moles of O₂

Explanation:

Equation of reaction:

4Al + 3O₂ → 2Al₂O₃

From the equation of reaction above, 4 moles of Al will react with 3 moles of O₂

We can use mole-concept to find the number of moles of O₂.

4 moles of Al = 3moles of O₂

719.68 moles of Al = x moles of O₂

X = (3 × 719.68) / 4

X = 2159.04 / 4

X = 539.76 moles

539.76 moles of O₂ will react with 719.68 moles of Al

Answer:

[tex]n_{O_2}=959.57molO_2[/tex]

Explanation:

Hello,

In this case, given the reaction:

[tex]4Al (s) + 3O_2(g) \rightarrow 2Al_2O_3(s)[/tex]

Since aluminum and oxygen are in a 4:3 molar ratio, we compute the moles of oxygen that completely react as shown below:

[tex]n_{O_2}=719.68molAl*\frac{3molO_2}{4molAl} \\\\n_{O_2}=959.57molO_2[/tex]

Best regards.

Which correctly defines a basic solution? A. [H+] is not present. B. [H+] is equal to [OH−]. C. [H+] is less than [OH−]. D. [H+] is greater than [OH−].

Answers

Answer:  A basic solution is defined as a solution which has more hydroxide (OH-) ions than hydronium ions (H+)

why is the international space station in orbit ​

Answers

Answer:

The ISS provides a location in the relative safety of low Earth orbit to test spacecraft systems that will be required for long-duration missions to the Moon and Mars.

Explanation:

Other Questions
Read the following excerpt from the article "Vision, Voice and the Power of Creation: An Author Speaks Out," by T. A. Barron and answer the question that follows:Right now, I am spending a lot of time listening to the voice of a particularly compelling character: the young Merlin. In the end, I finally heard the voice of Merlin thanks to a surprising source: the haunting, mysterious hooting of a great horned owl outside the window of my Colorado home. As I listened to that owl's resonant [echoing] call in the pre-dawn hours one morning, something about it gave me a whole new cadence [rhythm], a whole new sound. And then, a whole new voice.The author states, "I finally heard the voice of Merlin thanks to a surprising source: the haunting, mysterious hooting of a great horned owl outside the window of my Colorado home." What is the author's implicit message in this statement?(10 points)Group of answer choicesThe author realized Merlin's voice should have the same qualities as the owl's voice.The author thought Merlin's voice should seem like it is hooting.The author wished he had thought of Merlin's voice sooner.The author knew the owl would bring Merlin's voice to life. A spinner marked with four sections blue, green, yellow, and red was spun 100 times. The results are below. Find the experimental probability of landing on green? * Can anyone help with this math problem ? Which of the following is stored in the skeletal system?A. potassiumB. calciumphosphorousD. sodium Kelly needs 1/8 cups of sugar to make 1/4 of her cookie recipe. How much sugar does she need to make the entire recipe? Plz help! Will give brainiest!For the girl to lift this rock, she must push her end down _____ to raise the rock _____.A.a lot; a littleB.a little; a lotC.a little; a little What group of hired soldiers helped Rome conquer enemies and expand it's territory Which did Kepler notice about planetary motion that caused him to propose Keplers first law of orbital motion?Answer is the distance to the sun varies.I do not understand it. Can you please explain? Thank you. When an earlier people's culture has great and widespread influence on some later cultures and people, the original culture is referred to as the ______ culture. mother brother sister father Find the area of the segment of the circle. What is a word that means "how people get from place to place"? Read the passage from Sugar Changed the World.How do the details in this passage support the authors'purpose?Sugar is different from honey. It offers a stronger sweetflavor, and like steel or plastic, it had to be invented. In theAge of Sugar, Europeans bought a product made thousandsof miles away that was less expensive than the honey fromdown the road. That was possible only because sugar setpeople in motion all across the world-millions of them asslaves, in chains; a few in search of their fortunes. A perfecttaste made possible by the most brutal labor: That is thedark story of sugar.The comparison of honey to sugar production helpspersuade readers that honey is better than sugar.The details about sugar's dependency on slavery helpinform readers about why sugar was inexpensive.The details about the sugar's strong flavor entertain thereader with stories of how people invented sugar.The comparison of the invention of sugar to steel helpspersuade readers that sugar is easier to make than steel. In the poem "I dwell in Possibility," what is the motif?the visitorsthe house imagerythe poetrythe imagery of the outdoors Pollution Busters Inc. is considering a purchase of 10 additional carbon sequesters for $120,000 apiece. The sequesters last for only 1 year before becoming saturated. Then the carbon is sold to the government. a. Suppose the government guarantees the price of carbon. At this price, the payoff after 1 year is $140,400 for sure. How would you determine the opportunity cost of capital for this investment? b-1. Suppose instead that the sequestered carbon has to be sold on the London Carbon Exchange. Carbon prices have been extremely volatile, but Pollution Busters CFO learns that average rates of return from investments on that exchange have been about 22%. She thinks this is a reasonable forecast for the future. What is the opportunity cost of capital in this case? b-2. If the expected return on the investment is still 17%, but instead depends on the price of carbon (so that it is no longer risk-free), then is the purchase of additional sequesters an attractive investment for the firm? Given the following phylogenetic tree, which evolutionary event occurred most recently? A.) development of different forms of symmetry.B.) development of tissues.C.) each of these traits evolved at the same time.D.) protostome and deuterostome development. In Christianity, "the world" means the sinful, flawed world ofhumans. What is the effect of the contrast between the world" in!this poem and the author's references to Christ?SELECT AN ANSWERUThe author is rejecting the power thathuman society has over him byemphasizing Christ as the ultimateauthority.The author is accepting society's emphasison appearances by emphasizing Christ'sappearance.The author is saying religion is a crutch forthe oppressed. True or false: When the judge gives the jury a charge he is holding them in contempt How did the new deal change American political thinking tan(-20) = _____. -tan 20 tan 20 tan (-160) -tan 160 Enviro Company issues 8%, 10-year bonds with a par value of $300,000 and semiannual interest payments. On the issue date, the annual market rate for these bonds is 10%, which implies a selling price of 87 1/2. The straight-line method is used to allocate interest expense. 1. Using the implied selling price of 87 , what are the issuer's cash proceeds from issuance of these bonds? 2. What total amount of bond interest expense will be recognized over the life of these bonds? 3. What is the amount of bond interest expense recorded on the first interest payment date?