Nitric acid decomposes in light to form nitrogen dioxide, water, and oxygen, according to the following chemical equation.

4HNO3 (l â 4NO2(g) + 2H2O (l) + O2(g)

If 2.5 g nitric acid decomposes, what is the total volume of gas produced?

a. 0.050L
b. 0.22
c.0.89
d. 1.1L

Answer:

C₈H₁₈(l) + O₂(g) ⇒ CO₂(g) + H₂O(l)

Explanation:

Let's consider the unbalanced equation for the combustion reaction of octane.

C₈H₁₈(l) + O₂(g) ⇒ CO₂(g) + H₂O(l)

We can begin balancing H atoms by multiplying H₂O by 9, and C atoms by multiplying CO₂ by 8.

C₈H₁₈(l) + O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(l)

Finally, we get the balanced equation by multiplying O₂ by 12.5.

C₈H₁₈(l) + 12.5 O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(l)

Answer:

The coefficents will be 2, 25 --> 16, 18

Explanation:

Answer:

increase the number of blocks

increase the number of students pulling the cart

increase the number of blocks and increase the number of students pulling the cart

decrease the number of blocks

decrease the number of students pulling the cart

decrease the number of blocks and decrease the number of students pulling the cart

(ANSWER CHOICES)

Explanation:

Answer:

true

Explanation:

Hotter things have more heat energy than colder things. That's because the atoms or molecules move around faster in hot things (red, right) than they do in cold things (blue, left). ... The more heat you supply, the faster the molecules move and the further apart they get.

Answer: Depends on the situation.

Explanation: Hotter things do have more energy than colder things. But, if the mass of the colder thing is bigger, it really depends. If the colder thing have way more particles than the hotter thing, the colder thing may have more energy.

Answer:

The answer is below

Explanation:

The separation technique is used for separating immiscible liquids.

When separating, the stopper has to be removed when draining the lower layer so as to prevent a vacuum. If vacuum is allowed, the draining rate will reduce and stop.

The liquid should be mixed by shaking the funnel and then opening the stopcock so as the vent out gases.

When near interface between the layers, you should set your eye level so that you do not drain up to the second layer.

After completely draining the first layer, the second layer should be collected in a new flask.

After mixing the solutions in a separatory funnel, the stopper should be removed and the liquid should be mixed thoroughly and the layers allowed to separate. When you get close to the interface between the layers, get eye level with the funnel and slow the draining until the first layer is collected. Switch to a new flask to collect the second layer.

After mixing the solutions in a separatory funnel, the stopper should be removed and the liquid should be mixed thoroughly and the layers allowed to separate. When you get close to the interface between the layers, get eye level with the funnel and slow the draining until the first layer is collected. Switch to a new flask to collect the second layer.

Learn more:

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Answer:

Chemical

Explanation:

the acid is a chemical and the molecules are getting torn apart by the acid

Answer:

The planet would stop

Good luck!

Explanation:

it can suddenly increase when more and more people have babies and the infant rate goes up. and how it might affect the ecosystem is the pollution that people give off.

Answer:

Explanation:

Due to less predators in the Savannah/habitat, the population could unexpectedly grow. This will have an impact on the environment because it will give rise to more prey as there will be fewer predators. If too many herbivores are present on one feeding site, competition for food will occur. If there are more plants in an area than normal, it can increase the population of animals that consume the plant. If the population of one animal rises, the population of animals that consume that animal could also rise.

Population growth isn't always good. A population may often grow too big to sustain the climate. Other modifications in limiting variables can cause a population to decline. The population will decrease if a population becomes diseased, and the population of animals that consume the diseased animals will decrease as well. Populations in nature typically balance themselves. Sometimes, they can't always restore a natural balance as man affects populations.

Answer:isothermic

Explanation:

Answer:

Energy abosorbed = Energy released.

Thus ISOTHERMIC

Answer:

It's visualization.

Explanation:

Hope this helps :)

Explanation:

Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles (radiation). Decay is said to occur in the parent nucleus and produces a daughter nucleus. This is a random process, i.e. it is impossible to predict the decay of individual atoms.

HOPE THSI HELPS HAVE A NICE DAY!

Answer:

True

Explanation:

The core of the earth is very dense so that leads me to beleive that the answer is true.

Answer:

PHOTOSYNTHESIS

Explanation:

Photosynthesis is the process by which plant take in Carbondioxde and water in the present of sunlight in order to produce glucose and oxygen

Answer:

4.54g of Tris base,25mL of the 0.25M stock solution of glucose and 7.5mL of the 5M stock solution of NaCl must be added and complete the volume in a volumetric flask to 250.0mL

Explanation:

To prepare the single solution we need to find the moles of each solute (Tris, glucose and NaCl) from the stock solutions anf the solid:

Moles Tris:

0.250L *(0.150mol / L) = 0.0375moles Tris * (121.1g/mol) = 4.54g of Tris base must be added

Moles glucose:

0.250L * (0.025mol/L) = 6.25x10⁻³mol glucose * (1L / 0.25mol) = 0.025L = 25mL of the 0.25M stock solution of glucose must be added

Moles NaCl:

0.250L * (0.150mol / L) = 0.0375mol NaCl * (1L / 5mol) = 0.0075L =

7.5mL of the 5M stock solution of NaCl

You must add:

4.54g of Tris base,25mL of the 0.25M stock solution of glucose and 7.5mL of the 5M stock solution of NaCl must be added and complete the volume in a volumetric flask to 250.0mL

Answer:

C

Explanation:

Answer:65.4 meters= 65400 millimeters

Answer:

89%

Explanation:

The computation of the sample percentage is sugar is shown below:

As we know that

The mass of the total sample mixture is

= Mass of salt + mass of sugar

= 0.8920

And, the mass of salt is 0.0982 g

So, the mass of sugar is

= 0.8920 - 0.0982

= 0.7938 g

Now the percentage of the sample is sugar is

= 0.7938 ÷ 0.8920

= 89%

Answer: a) [tex]H_3O^++CH_3O^-\rightleftharpoons CH_3OH+H_2O[/tex]

acid : hydronium ion

base : methoxide ion

conjugate acid : methanol

conjugate base: water

b) [tex]CH_3CH_2O^-+HCl\rightleftharpoons CH_3CH_2OH+Cl^-[/tex]

acid : hydrogen chloride

base : ethoxide ion

conjugate acid : ethanol

conjugate base: chloride ion

c) [tex]NH_2^-+CH_3OH\rightleftharpoons NH_3+CH_3O^-[/tex]

acid : methanol

base : amide ion

conjugate acid : ammonia

conjugate base: methoxide ion

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

The species accepting a proton is considered as a base and after accepting a proton, it forms a conjugate acid.

The species losing a proton is considered as an acid and after loosing a proton, it forms a conjugate base

For the given chemical equation:

a) [tex]H_3O^++CH_3O^-\rightleftharpoons CH_3OH+H_2O[/tex]

acid : hydronium ion

base : methoxide ion

conjugate acid : methanol

conjugate base: water

b) [tex]CH_3CH_2O^-+HCl\rightleftharpoons CH_3CH_2OH+Cl^-[/tex]

acid : hydrogen chloride

base : ethoxide ion

conjugate acid : ethanol

conjugate base: chloride ion

c) [tex]NH_2^-+CH_3OH\rightleftharpoons NH_3+CH_3O^-[/tex]

acid : methanol

base : amide ion

conjugate acid : ammonia

conjugate base: methoxide ion

.

Answer:

Scientists hypothesized that WNS, caused by the fungus Pseudogymnoascus destructans, makes bats die by increasing the amount of energy they use during winter hibernation. Bats must carefully ration their energy supply during this time to survive without eating until spring

Explanation:

a. [tex]\mathrm{2HCl_{(aq)} + Zn_{(s)}} \rightarrow \mathrm{H_{2(g)} + ZnCl_{2(aq)}}[/tex]

b. [tex]\mathrm{2C_2H_{2(g)} + 5O_{2(g)}} \rightarrow \mathrm{4CO_{2(g)} + 2H_2O_{(g)}}[/tex]

c. [tex]\mathrm{2AgNO3_{(aq)} + CaCl_{2(aq)}} \rightarrow \mathrm{2AgCl_{(s)} + Ca(NO_3)_{2(aq)}}[/tex]

d. [tex]\mathrm{O_{2(g)}+2H_{2(g)}} \rightarrow \mathrm{2H_2O_{(\ell)}}[/tex]

e. [tex]\mathrm{2H_2O_{2(aq)}} \rightarrow \mathrm{O_{2(g)} + 2H_2O_{(\ell)}}[/tex]

Answer:

The one left in the hot sunlight.

Explanation:

The solubility of gases decreases when temperature increases. The gas in the soda pop (CO2) left in the sun will not stay dissolved as much as the on left in the refrigerator.

Soda is a carbonated drink with soda or water and a sweetener. Soda pop in the fridge will have more fizzing and bubbles.

Carbonated drinks are drinks or beverages that contain dissolved carbon dioxide. They have small bubbles and fizz of the carbon dioxide present in them.

Carbonation of the drinks is linked to the temperature as at high temperature, liquid tends to lose the carbon dioxide fizz. The carbon dioxide bubbles are retained at low temperatures as the solubility of the carbon dioxide is increased.

Therefore, the bottle kept in the refrigerator will have more bubbles and fizz.

Learn more about soda and carbonated here:

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Answer:

potential energy = mgh put values and get your answer

How atoms interact with other atoms is largely dependant on the number of electrons on its outermost layer. The electrons on this layer are called valence electrons.

As you might know, atoms have their electrons arranged in layers/shells, starting at k, l m, n etc. Each layer has a maximum number of electrons it can accommodate, with the outermost one being the valence shell. The first layer (k) can accomodate 2 electrons, the second one (l) can accomodate 8, as can the third one (m) etc.

As a rule of thumb, most atoms don't like being alone. These atoms have a valence shell that isn't saturated. This is the case for hydrogen(1), with one free slot in its outter shell.

However, atoms like helium are a bit different. They are inert, and don't need to bond with other atoms. This is because their valence shell is saturated. In this case, helium saturated the k shell with 2 electrons. Helium in this form will not form bonds.

However, hydrogen is still out there looking for buddies. Hydrogen will bind with any other atom with a free electron. Being extremely common, it's likely that said atom will be another hydrogen.

However, another common example would be for 2 hydrogens to bond with one oxygen, forming h2O (oxygen can form 2 bonds)

Conclusion : helium is inert and will not interact with other atoms. Hydrogen is not, and thus needs to bond with other atoms.

Answer:

(Kc)^2

Explanation:

For this reaction 4 A⇌ 2B Kc is (Kc)∧².

The equilibrium constant is the value of the reaction quotient that is calculated from the expression for chemical equilibrium. A thermodynamic equilibrium constant, denoted by , is defined to be the value of the reaction quotient Qt when forward and reverse reactions occur at the same rate. At chemical equilibrium, the chemical composition of the mixture does not change with time and the Gibbs free energy change. Stability constants, formation constants, binding constants, association constants and dissociation constants are all types of equilibrium constants.

Learn more about equilibrium constant, refer:

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#SPJ2

Answer:

1. 0.1712M

2. 6.86mg/mL Ca, 12.14mg/mL Cl, 6860000ug/L Ca, 12140000ug/L Cl, 6860mg/L Ca, 12140mg/L Cl, 6860ug/mL Ca, 12140ug/mL Cl.

3. 6860ppm Ca and 12140ppm of Cl.

4. 1.5mL of the 1000ug/mL barium standatd must be taken.

Explanation:

1. Molarity is defined as the amount of moles of solute (Calcium chloride) present in 1L of solution.

The moles of CaCl₂ are:

1.9g CaCl₂ * (1mol / 110.98g) = 0.01712 moles

In 100mL = 0.10L:

0.01712mol / 0.10L = 0.1712M

2. The masses of Calcium and Chloride ions are:

1.9g * (40.078g Ca / 110.98g) = 0.686g Ca

And:

1.9g - 0.686g Ca = 1.214g Cl

mg/mL:

686mg Ca / 100mL = 6.86mg/mL Ca

1214mg Cl / 100mL = 12.14mg/mL Cl

ug/L:

686000ug / 0.1L = 6860000ug/L Ca

1214000ug/ 0.1L = 12140000ug/L Cl

mg/L:

686mg Ca / 0.1L = 6860mg/L Ca

1214mg Cl / 0.1L = 12140mg/L Cl

ug/mL:

686000ug Ca / 100mL = 6860ug/mL Ca

1214000ug Cl / 100mL = 12140ug/mL Cl

3. ppm are defined as mg/L, the ppm of Ca are 6860ppm Ca and 12140ppm of Cl

4. The solution must be diluted from 1000ug/mL to 30ug/mL, that is a dilution of:

1000ug/mL / 30ug/mL:

33.33 times must be diluted the solution.

As final volume of the diluted solution must be 50mL, the volume of the standard needed is:

50mL / 33.33 times = 1.5mL of the 1000ug/mL barium standatd must be taken

Answer:

C) Atoms

Explanation:

Hope that helped :)

Answer:

Explanation:

Introduction Paragraph. Hook. Background Points. Thesis Statement.( done)

Body Paragraph. Topic Sentence. Supporting fact 1. Supporting fact 2. Transition Sentence.(done)

Conclusion Paragraph. Re-statement of Thesis. Summary of Main Point. Challenge to the Reader.( done)