How many moles of O2 can be produced from 1.7 moles of KClO3?

Answer:

A. 16 grams.

B. 4 mol.

Explanation:

A. To find the atomic weight of one mole of CH4, we can simply reference the periodic table and find the atomic weights of each element:

12.0+4(1.0)= 16.0 g.

B. To find the amount of moles in 64 grams, we can simply divide:

64.0÷16.0= 4 mol.

Answer:

I'm not entirely sure, but I've heard that vaccines contain very weak amounts of the virus in order to expose your body to it, so that your body can become immune to it before being exposed to the real thing.

So basically, a flu shot contains a weak version of influenza.

I don't know this for sure, but hopefully this helps!

Answer:the objects will be about the same temperature as the room

Explanation:

Answer:

Pb(s) ---> Pb+2 + 2e- is the anode

Cu+2(aq) + 2e- ---> Cu(s) is the cathode

Answer:

1. (i) H₂ will decrease

(ii) H₂ will increase

2. (i) Shift right

(ii) Shift left

(iii) Shift left

(iv) Shift left

3. (i) Shift left

(ii) Shift right

(iii) Shift left

4. (i) H₂O will increase

(ii) H₂O will increase

Explanation:

1. For the reaction, N₂ (g) + 3H₂ (g) ↔ 2NH₃ (g) + 22 kJ

(i) When the NH₃ is removed, the concentration of the products is reduced favoring the consumption of further reactants hence the H₂ will decrease

(ii) When N₂ is removed, N₂ will become the limiting reactant resulting in the presence of excess H₂, hence H₂ will increase

2. 2NO (g) + H₂ (g) ↔ N₂O (g) + H₂O (g) 36 kJ

(i) When NO is added, it will favor the increase of the reaction and the equilibrium will shift to the right

(ii) H₂ is removed, it will favor the decomposition of the products hence the equilibrium will shift to the left

(iii) When N₂O is added, it will cause the increase in the partial pressure of the products which will result in the increase in the partial pressures of the reactants to compensate, hence the equilibrium will shift to the left

(iv) When H₂ is removed it will cause the equilibrium to shift left as more products will decompose to form the balance H₂

3. For the reaction;

CO₂ (g) + H₂ (g) + heat ↔ CO (g) + H₂O (g)

(i) When CO is added, there will be an excess partial pressure of the products and the equilibrium will shift left

(ii) When CO₂ is added, there will be an excess partial pressure of the reactants which will favor the formation of the products and the equilibrium will shift right

(iii) When H₂ is removed, there will be an decrease in the partial pressure and concentration of the reactants which will favor the decomposition of the products to balance up the partial pressures of the reactant and the equilibrium will shift left

4. In the reaction  2NO (g) + H₂ (g) ↔ N₂O (g) + H₂O (g) + heat

(i) When NO is added, the concentration of the reactants will increase, hence increasing the likelihood of the formation of more products and the equilibrium will shift to the right and H₂O will increase

(ii) When N₂O is removed, the partial pressure and concentration of the products will reduce hence to balance up the partial pressures of the reacting mixture, more products will be formed and H₂O will increase.

Answer:

1.84 atm

Explanation:

P2=V1P1/V2

Temp is irrelevant because it is constant, so all you have to do is rearrange the ideal gas law.

You can check this by knowing P and V at constant T have an inverse relationship and therefore makes this the correct answer.

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

Answer:

No.4 is B No.5 is d

Explanation:

Answer:

Q 4: d

Explanation: this is all I can answer

Answer:

heat = 229139.43 cal

Explanation:

given data

specific heat of iron is 0.107 cal/g-°C     C = 0.4494 J/g°C;

Mass of iron = 24.7 kg = 24700 g

temperature T1 = 880°C

temperature T2 = 13°C

solution

we know that Heat lost that is express as

heat loss = mcΔT      .........................1

here m is the mass and c is specific heat capacity of iron and ΔT is the change in temperature

so here change in the temperature is = 880°C - 13°C

change in the temperature = 867°C

so put here value and we get

heat  = 24700 × 0.107 cal/g-°C × 867°C

heat = 229139.43 cal

A student determines that she used 0.0665 mole of sodium hydroxide (NaOH) to completely titrate 25.00 mL of sulfuric acid solution. The molarity of the sulfuric acid is 1.31 M. Therefore, option C is correct.

Number of moles of solute per liter of solution is known as molarity.

The balanced chemical equation for the reaction between sodium hydroxide and sulfuric acid is:

2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O

According to the balanced equation, one mole of sulfuric acid reacts with two moles of sodium hydroxide. Therefore, the number of moles of sulfuric acid in the titrated solution can be calculated as:

moles of H₂SO₄ = (moles of NaOH) / 2

moles of H₂SO₄ = 0.0665 mol / 2

moles of H₂SO₄ = 0.03325 mol

The volume of the sulfuric acid solution used in the titration is 25.00 mL, which is equivalent to 0.02500 L. The molarity (M) of the sulfuric acid can be calculated as:

Molarity of H₂SO₄ = moles of H₂SO₄ / volume of H₂SO₄ solution in liters

= 0.03325 mole / 0.02500 L

= 1.31 M

Thus, option C is correct.

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Answer:

D

Explanation:

The safety equipment that is needed when your doing a science experiment you need a safety goggles and gloves.

Answer:

nitrogen

Explanation:

Living organisms often contain trace amounts of several elements, but the most abundant ones are oxygen, carbon, hydrogen, nitrogen, calcium and phosphorus.

Oxygen. ...

Carbon. ...

Hydrogen. ...

Nitrogen. ...

Sulfur. ...

Phosphorus.

The Six most Abundant Elements that occur in Living Organisms.

So the correct answer is option D. Nitrogen.

Nitrogen is important for plant growth and can be 'fixed' by lightning or added to soils in fertilizers. A colourless, odourless gas. Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives.

It is used to make amino acids in our body which in turn make proteins. It is also needed to make nucleic acids, which form DNA and RNA. Humans or other species on earth require nitrogen in a 'fixed' reactive form.

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Answer:

Without dark matter galaxies would loose an extreme amount of gas required to create stars.

Without dark matter the universe wont have as many galaxies clumped together forming larger versions of those galaxies. This would cause a change in the structure of the "skeleton" of the web.

(Hope this can help, I didn't do exactly as it is said to because that is your job)

:)

Explanation:

Forbes gives somewhat of an explanation if you are curious.

(Ethan Siegal, "The Universe Would Be Very Different Without Dark Matter", Forbes)

Dark matter makes up most of matter in the universe and is found by a quarter of the total composition of the space. After the event of the big bang, the universe expanded and dark matter grew.

Thus dark matter is a link within and with the comic web.

Learn more about the dark matter and its development-related after the big bang event

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Answer:

[tex]m = 64\,g[/tex]

Explanation:

The mass of the solute is given by the following expression:

[tex]m = 0.16\cdot (400\,g)[/tex]

[tex]m = 64\,g[/tex]

Answer:

True True False

Explanation:

Valves are in most veins (to prevent backflow). Also valves in the chart and an in an combustion engine.

So the first statement is True.

Valves control the flow rate and direction of fluid within a closed system. So the second statement is True.

1 Pa = 1 N/m² So since 1 Pa equals to one newton per square metre the third statement is False.

Answer:

 24He

Explanation:

When a nuclide is bombarded with alpha particles, we notice an increase in its mass and charge since an alpha particle has a mass of four and a charge of +2. recall that nuclear equations must be balanced. That is, the masses and charges on the left hand six and the right hand side of the nuclear reaction equation must be exactly the same.

Looking at the nuclear reaction at hand, the total mass on the left hand side has to be 246 while the total charge on the left hand side of the equation will be 98. Coming over to the right hand side, the total masses are also found to be the same as a neutron with no charge and a mass of 1 is produced. Hence the nuclear reaction equation is balanced when an alpha particle (helium nucleus) is substituted for X in the equation.

Answer:

24HE

I took the test!

When CuSO​4​​⋅​ 5H​2​O is heated in a crucible, there is a loss of water. Subtract the mass of the CuSO​4​⋅ 5H​2​O from the mass of CuSO​4 to determine the amount of water lost. Therefore, option B is correct.

A substance made up of two or more components is called a compound. Table salt, water, and carbon dioxide are a few examples of compounds.

Chemical substances have no electrical charge. In most cases, ionic compounds are created when a metal interacts with a nonmetal. The reaction between two nonmetals produces covalent compounds.

Elements are unadulterated substances made up of only one kind of atom. Compounds are substances that are created when two or more different types of elements are chemically combined in predetermined ratios.

To determine the amount of water lost subtract the mass of the CuSO​4​⋅ 5H​2​O from the mass of CuSO​4.

Thus, option B is correct.

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Answer:

55×10^-26 J

Explanation:

We can calculate the energy of the wave from

E= hc/λ

Where

h= Planks constant = 6.6×10^-34 Is

c= speed of light = 3×10^8 ms-1

λ= wavelength of the wave = 0.36 metres

Recall that cell phone use radio waves which belong to the electromagnetic spectrum hence it must possess the speed of light.

E= 6.6×10^-34 × 3×10^8/ 0.36

E= 55×10^-26 J

Hence the energy possessed by 0.36 meters wavelength radio waves is 55×10^-26 J

Answer:

c

Explanation:

Answer:

C) indicator like cabbage juice

Explanation:

This is because the pH scale is used to show how acidic or alkaline a substance is. Also it can not be a and b as the sentence doesn't specify the pH nor if it is an acid or a base. This would mean that the sentence would not make sense with a&b.

The pH scale is a scale ranging from 0-14, with 7 being neutral and a number above 7 would be considered alkaline and if the number is less than 7 then it would be considered an acid.

Examples of indicators for the pH scale:

pH probe = a pH probe is a device used to show the pH of a substance.

Universal Indicator= a universal indicator is a substance that changes colour when exposed to a substance. Universal indicator can also show how acidic or alkaline a substance is.

Answer: conjugate base

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.

A weak acid has a strong conjugate base whereas a strong acid has a weak conjugate base. Similarly a weak base has a strong conjugate acid whereas a strong base has a weak conjugate acid.

[tex]CH_3COOH+NH_3\rightarrow CH_3COO^-+NH_4^+[/tex]

Acetic acid [tex]CH_3COOH[/tex] is weak acid which has strong conjugate base [tex]CH_3COO^-[/tex]

Answer:

the pressure will decrease

Explanation:

Ideal gas law is valid only for ideal gas not for vanderwaal gas. The pressure will remain same as the initial pressure on decreasing volume and temperature by half.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. real gas can become ideal gas at low pressure and high temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of  gas

V= volume of  gas =1/2V

n =number of moles of  gas

T =temperature of  gas =T/2

R = Gas constant = 0.0821 L.atm/K.mol

Substituting all the given values we get

P×(V/2)=nR(T/2)

(PV)/2=(nRT)/2

PV=nRT

Therefore, the pressure will remain same as the initial pressure  on decreasing volume and temperature by half.

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Answer:

1 quart of lemonade will be in the first cup

Explanation:

1/4th of a gallon is a quart

Answer:

Explanation:

Hb(CO)4(aq) + 4O2(g)  ⇄  Hb(O2)4(aq) + 4CO(g)

1 )  If we increase the concentration of CO(g) , the reaction above will proceed in reverse direction to decrease its concentration,  according to Le Chatelier principle. Hence more of Hb(CO)4(aq) will be formed.

2 )  If we decrease the concentration of O₂ , then also , reaction will proceed in reverse direction . Hence concentration of Hb(CO)4(aq) will be increased .

Answer:

I would say the wood floor because it's really cold. I hope this helps you out ☺️

Explanation:

Answer: i would say tile floor just because it gets cold around and is not able to be heated like carpet lol

Explanation:

Answer:

I need the things after "which of the following would occur".

Explanation:

If you were to maintain a constant volume while decreasing pressure, the temperature would also have to decrease. This is Boyle's law.

Answer:

A

Explanation:

Neutralization reaction is

base + acid ---> salt + water.

Answer:

The equilibrium concentration of gas A is 1.43 M

Explanation:

Here we have the reaction expressed as follows;

A + B → C + D and

The formula for equilibrium constant is therefore presented as follows;

[tex]K = \frac{[C]\times [D]}{[A]\times [B]}[/tex]

Where:

[C] = [D] = 2.3 M

[A] = [B]

K = 2.6

Hence, we have;

[tex]2.6 = \frac{2.3\times 2.3}{[A]\times [A]} = \frac{5.29}{[A]^2}[/tex]

[tex][A]^2= \frac{5.29}{2.6} = 2.03[/tex]

[A] = 1.43 M

The equilibrium concentration of gas A = 1.43 M.

Answer:

The equilibrium concentration of gas A = 1.43 M

Explanation:

First set up the equilibrium expression:

[tex]K = \frac{[C]\times [D]}{[A]\times [B]}[/tex]

The problem states that each product has a concentration of 2.3M at equilibrium, and that k=2.6

We also know that [A] and [B] are the same.

Since we are solving for [A] I'm going to change [A][B] to A²

[tex]2.6 =\frac{2.3^2}{A^2}[/tex]

Now we just need to solve for A²

A² = 5.29 / 2.6

A² = 2.0346

A = √2.0346

A = 1.43

Therefore, the equilibrium concentration of gas A = 1.43 M.

Answer:

Do you still need this answer? If you do i can provide it for you still

Thank you