Chemistry College

does the following atomic model of a chemical reaction correctly demonstrate the law of conversation of matter why or why not

plzzz help ​

Does The Following Atomic Model Of A Chemical Reaction Correctly Demonstrate The Law Of Conversation

Answers

Answer 1

Answer:

Yes

Explanation:

You can tell because there are 2 moles of H2 on the reactants side and 1 mole of O2, and on the products side we see the same amount, meaning that no moles of H2 or O2 were added or destroyed, meaning that it follows the law of conservation of matter.

Related Questions

define conjugate Base and conjugate acid​

Answers

Explanation:

conjugated base is substance formed when an acid loses

a hydrogen ion.

conjugated acid is a type of acid that is formed when a base accepts a proton in solution

How how how how how

Hello Americans greetings from the Philippines ​

Answers

Answer:

good day philipines

Explanation:

Answer:

hello

Explanation:

In general, people of __ heritage will be the last to get

white hair.

Answers

Answer:

African?

Explanation:

does the following atomic model of a chemical reaction correctly demonstrate the law conservation of matter why or why not plz help ​

Answers

Answer:

ZH² + O² = ZH²O I think this may help you I don't really know how to explain

At a certain temperature, the equilibrium pressures of NO2 and N2O4 are 1.4 bar and 0.46 bar, respectively. If the volume of the container is doubled at constant temperature, what would be the partial pressures of the gases when equilibrium is re-established?

Answers

The partial pressure of NO₂ at equilibrium is 0.70 bar and the partial pressure of N₂O₄, at equilibrium is 0.23 bar.

Let x be the mole fraction of NO₂ and x' be the mole fraction of N₂O₄.

The total pressure according to Dalton's law of partial pressure is the sum of the partial pressures of each gas.

Let P be the total pressure of the gases, P' be the partial pressure of NO₂ = 1.4 bar and P" be the partial pressure of N₂O₄ = 0.46 bar.

So, P = P' + P"

= 1.4 bar + 0.46 bar

= 1.86 bar

Since P' = xP

x = P'/P

= 1.4 bar/1.86 bar

= 0.753

Also, P" = xP

x' = P"/P

= 0.46 bar/1.86 bar

= 0.247

Now, since the volume of the container is doubled at constant temperature, we use Boyle's law to determine the new pressure. P₁.

Boyle's law states that the pressure of a given mass of gas is inversely proportional to its volume provided the temperature remains constant. It is written mathematicaly as PV = constant

So, PV = P₁V₁

P₁ = (V/V₁)P

Since V/V₁ = 1/2

P₁ = (V/V₁)P

P₁ = P/2

P₁ = 1.86/2 bar

P₁ = 0.93 bar

So, the new partial pressure of NO₂, P₂ = xP₁

= 0.753 × 0.93 bar

= 0.70 bar

The new partial pressure of N₂O₄, P₃ = x'P₁

= 0.247 × 0.93 bar

= 0.23 bar

So, the partial pressure of NO₂ at equilibrium is 0.70 bar and the partial pressure of N₂O₄, at equilibrium is 0.23 bar.

Learn more about partial pressure here:

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Which of the following statements is true about CO?

а
The carbon and oxygen share electrons.
b
Carbon is the cation and oxygen is the anion.
с
It is the element cobalt.
d
Its name is monocarbon monoxide.
e
none of these

Answers

Answer:

it is the element cobalt with atomic number 27

Please help help helpppppppp

Answers

1. Magnesium atoms also have a slightly smaller radius than sodium atoms, and so the delocalised electrons are closer to the nuclei.
2. Sodium has higher melting point than potassium because of stronger metallic bonding .
3. Potassium are very soft metal can be very easily cut with a knife
4. Increase of resistance in metals. Therefore the mobility of electrons decreases and causes decrease in conductivity.
5.To increase strength, increase corrosion resistance, or reduce costs.
6. All metals have low ionization energies and are relatively electropositive, and so they lose electrons fairly easily.
7. All the group 1 metals are reactive, but they get more reactive as you go down the group, so potassium is more reactive than sodium.

calculate the number of molecules in 4.48dm3 of hydrogen at STP​

Answers

Answer: 1 more of hydrogen =22.4dm3

X moles of hydrogen =4.48dm3

22.4dm3x = 4.48dm3

4.48dm3\22.4dm3

X=0.2 moles

Explanation: 1 volume of hydrogen at STP is 22.4dm3

Which of these is a characteristic of warm air?

It transfers energy through radiation.

Its molecules are far apart.

It sinks due to convection.

It cools the land below it.

Answers

Answer: B.

Explanation:

Warm air molecules are far apart, while cool air molecules are packed closer together.

Answer: A It Transfers energy through radiation

Explanation: I jut got done with the exam 15 min ago

Why must labs that use mercury thermometers calculate Kelvin ? ​

Answers

Answer:

because those are the only thermometers that are truly accurate for kelvins

Explanation:

The Kelvin temperature in thermometers is used by scientists because it provides a temperature where zero indicates the complete absence of thermal energy.

What is the Kelvin scale?

All thermometers have a scale on them that we use to find the temperature, known as a temperature scale. Kelvin proposed that the temperature interval from the ice point to the steam point be defined as 100° containing earlier centigrade scales.

Lord Kelvin had given an absolute temperature scale based on the Carnot cycle.  The zero point is 273.15 on Kelvin’s scale below that of the Celsius scale.

On the kelvin scale, Each division is called a Kelvin (K) and is equal to a degree on the Celsius scale. On the Celsius scale, zero degrees is the freezing point of water while on the Kelvin scale the zero point is at absolute zero temperature.

Therefore, 0 K is equal to - 273.15°C, and 0°C is equal to 273.15 kelvins. A mathematical expression that gives the relation between the Celsius and Kelvin scales:

Temperature (K) = Temperature (°C) + 273

Learn more about Kelvin scale, here:

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Write the symbol for every chemical element that has atomic number less than 13 and atomic mass greater than 17.2 u.

Answers

I’m so sorry don’t know just need the points asap

what is oxidation number on Ni in the next compound
K2[NiBr6] ???

Answers

Explanation:

The oxidation number of Ni is +4

The ion of aluminum is

Al+

Al2-


Al2+


Al3+


Al3-

Answers

Answer:

A13+

Explanation:

I took a test that had this question.

How many atoms of copper in 3. 11 g of copper

Answers

Atomic weight of copper = 63.5 g1 mole of copper contains = 63.5g = 6.023 × 10²³ atoms of copper1 g of copper contains[tex] = \frac{ 6.023 \times 10²³}{63.5} [/tex]= 9.4 × 10²¹ atomsTherefore, 3.11g of copper contains[tex] = 3.11 \times 9.4 \times {10}^{21} \\ [/tex]= 29.234 × 10²¹ atoms

Hope you could get an idea from here.

Doubt clarification - use comment section.

Which list correctly compares how adding energy affects a substance during a phase change and not during a phase change?(1 point)

during a phase change: particles overcome forces of attraction and temperature stays the same
not during a phase change: particles become closer together
during a phase change: particles overcome forces of attraction and temperature stays the same
not during a phase change: temperature rises
during a phase change: particles overcome forces of attraction and temperature rises
not during a phase change: particles become closer together
during a phase change: particles overcome forces of attraction and temperature rises
not during a phase change: temperature rises


Which action happens at the microscopic scale as the temperature of a substance decreases and it eventually freezes?(1 point)

Particle motion decreases, and electrostatic forces pull particles closer together.
Particle motion increases, and the particles overcome electrostatic forces.
Particle motion decreases, and the particles overcome electrostatic forces.
Particle motion increases, and electrostatic forces pull particles closer together.

Which statement describes how a macroscopic property of gases provides information about microscopic gas particles?(1 point)

Gases fill their container, showing that gas particles are strongly attracted through electrostatic forces.
Gases have a fixed volume, showing that gas particles are strongly attracted through electrostatic forces.
Gases fill their container, showing that gas particles are not tied together and can move far apart.
Gases have a fixed volume, showing that gas particles are not tied together and can move far apart.

Answers

Answer:

1) during a phase change: particles overcome forces of attraction and temperature stays the same not during a phase change: temperature rises 2)Particle motion decreases, and electrostatic forces pull particles closer together.

3) Gases fill their container, showing that gas particles are not tied together and can move far apart.

Explanation:

Why was the war in Peru difficult?

Answers

Answer:

in contrast, peru and Bolivia entered the war hindered by numerous domestic fractures and by an economic and insititutional backwardness that nearly prevented the two countries from fighting the war at all

Need asap thank you

Answers

Answer:

c.boron-11

Explanation:

The atomic mass of boron is 10.81 u.

And 10.81 u is a lot closer to 11u than it is to 10u, so there must be more of boron-11.

To convince you fully, we can also do a simple calculation to find the exact proportion of boron-11 using the following formula:

(10u)(x)+(11u)(1−x)100%=10.81u

Where u is the unit for atomic mass and x is the proportion of boron-10 out of the total boron abundance which is 100%.

Solving for x we get:

11u−ux=10.81u

0.19u=ux

x=0.19

1−x=0.81

And thus the abundance of boron-11 is roughly 81%.

What are the five different types of leaves? Subject: science

Answers

Answer:

Needle and Scale Leaves. This kind of leaves are mostly found in 'evergreen' trees. ...

Lanceolate Leaf. ...

Oblong Leaf. ...

Linear Leaves. ...

Cordate Leaves.

Explanation:

Answer:

Broad

Flat Leaves.

Needle and Scale Leaves.  

Oblong Leaf.

Cordate Leaves.

Explanation:

Which of these objects will most likely float?

Answers

Answer:

plastic,palstic bottle,balloon,cap of water bottle,plastic slippers and plastic comb.

Explanation:

hope it helps :D

How are the sensory clues from watching a fire different from the sensory clues from watching a firefly?​

Answers

Answer:

sensory experience of a chemical reaction called combustion. In a way, fire is like the leaves changing color in fall, the smell of fruit as it ripens, or a firefly's blinking light. All of these are sensory clues that a chemical reaction is taking place

Explanation:

Sensory encounter with the combustion chemical process. Fire can be compared to the fall foliage's shifting hues, the aroma of ripe fruit, or the blinking light of fireflies. These are all sensory indicators that a chemical reaction is occurring.

What is combustion?

Combustion is defined as a chemical interaction between different compounds, usually involving oxygen, that produces heat and light in the form of flames. Hydrocarbons and oxygen are the only reactants in a combustion reaction. The fuel is a hydrocarbon, and oxygen is required for burning.

It stimulates several of our senses at once, producing the vivid experience we anticipate from a tangible object. By using fuel, heat, and oxygen during combustion, that sensory experience is produced.

Thus, sensory encounter with the combustion chemical process. Fire can be compared to the fall foliage's shifting hues, the aroma of ripe fruit, or the blinking light of fireflies. These are all sensory indicators that a chemical reaction is occurring.

To learn more about combustion, refer to the link below:

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Heart, 5 stars, Brainiest, and 40 coins if right! Answer needed ASAP

Which statement describes what happens when Bret runs up a flight of stairs?
A. His kinetic energy is destroyed.
B. His potential energy decreases.
C. His kinetic energy is converted into potential energy.
D. His potential energy is converted into kinetic energy.

Answers

Answer:

His kinetic energy is converted into potential energy.

Explanation:

Need ASAP will give brainlist

Answers

Answer:

i think the answer will be C.

Explanation:

correct me if im wrong

loveya

The N2O decomposition, 2 N2O (g) → 2 N2 (g) + O2 (g), is a zero order reaction that has a reaction rate constant of 2.00 × 10−3 M/s. Initially, 2.00 moles of N2O gas are infused into a 1.00 L vessel at 300. K.Calculate the pressure inside the vessel at 100. seconds after the start of the reaction. Temperature is held constant.

Answers

Answer:

2.00n2g

Explanation:

hope its attachments

pa help po science po​​

Answers

Answer:

1. molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere

2. A

3. D

4. C

5. C

6. C

7. C

8. B

9. Sorry I don't know :(

10. B

11. A

12. C

13. Sorry :((

14. C

15. a

16. d

Sorry I don't know the rest.. I hope this helps though!!

Consider the chemical formula for calcium chlorate: Ca(ClO3)2

How many of each of these atoms is in a molecule of calcium chlorate?

Answers

I hope it help u =)

Brainliest answer pls

explain why soaps are soluble in water but fatty acids are not?​

Answers

Answer:

Because of the two different parts of the molecule, a soap molecule is soluble in water and at the same time can dissolve fats. The fats are attracted to the non-polar tail part of the soap while the polar head makes the whole complex.

Explanation:

hope it helps

Calculate the mass percentage of each element in aluminum oxide.

Answers

Answer:

So, Percentage Composition of Aluminium = 2778×100%=34.62% (approx.) Percentage Composition of Oxygen = 3×1678×100%=61.54% (approx.)

How do many types of cells, like bacteria, reproduce?

Answers

Answer:

cells like bacteria are bisexual so they split and their offspring is 100 percent like the parent and this process happens over and over

Explanation:

iDENTIFY THE NAME OF THE ELEMENTS OF THE ATOMS ABOVE

Answers

Answer:

oxygen carbon hydrogen nitrogen

Explanation:

identified by the number of protons in its atoms

Help asapp plzz!!!!

Answers

Answer:

Determining what data to collect.

Explanation:

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