Chemistry High School

PLEASE HELP! SEE ATTACHED!

PLEASE HELP! SEE ATTACHED!

Answers

Answer 1

Answer:

Ans => C => 43.3%

Explanation:

2CO + O₂ => 2CO₂

Given     1g CO = 1g/28g·mol⁻¹ = 0.036 mol CO

b/c coefficient of CO = coefficient of CO₂ => moles CO₂ = 0.036 mol = 0.036mol x 44g/mol = 1.57 gCO₂ (theoretical yield)

%Yield = (actual yield/theoretical yield) x 100% = (0.68g/1.57g) x 100% = 43.3%

Related Questions

What are two uses of sulfur?​

Answers

Answer:

It's used in the vulcanisation of black rubber, as a fungicide and in black gunpowder and a production of sulfuric acid.

Explanation:

ANSWER ASAP

1. NH₄NO₂(s) → N₂(g) + H₂O(l)

1a. Write the number (if any) that should go in front of NH₄NO₂(s), N₂(g), and H₂O(l) in order with commas in between. If there shouldn't be a number, write "no number".

1b. What type of reaction is represented in this equation?

2. Cl₂(g) + KBr(aq) → KCl (aq) + Br₂(l)

2a. Write the number (if any) that should go in front of each compound in order with commas in between. If there shouldn't be a number, write "no number".
2b. What type of reaction is represented in this equation?

3. FeS(s) + HCl(aq) → H₂S(g) + FeCl₂ (aq)

3a. Write the number (if any) that should go in front of each compound in order with commas in between. If there shouldn't be a number, write "no number".

3b. What type of reaction is represented in this equation?

Answers

Answer:

Ok:

Explanation:

1a:  [tex](no number) NH_4NO_2_{(s)} => (no number) N_2_{(g)} + 2 H_2O_{(l)}[/tex]

1b: Decomposition reaction

2a. [tex](no number) Cl_2_{(g)} + 2 KBr_{(aq)} => 2 KCl_{(aq)} + (no number) Br_2_{(l)}[/tex]

2b Single replacement reaction

3a. [tex](no number)F_2S_{(s)} + 2HCl_{(aq)} =>(no number)H_2S{(g)} + (nonumber)FeCl_2_{(aq)}[/tex]

3b. Double replacement reaction

You push 100kg door with force of 200 with what force does the door push back on you

Answers

Answer:

for every action there is equal and oposite reaction so door als pushes us back with same force. ie;200N.

Someone help please!!!

Answers

Well, the answer to this question is A. Also, I just want to wish you a happy new year and have a fantastic and amazing rest of your day!

The Princess cruise ship left San Francisco and traveled south for 8 hours at a speed of 30mph. What is the velocity of the ship? Round your answer to the hundreths place

Answers

Answer:

v = 300 mph due South.

Explanation:

Given that,

The Princess cruise ship left San Francisco and traveled south for 8 hours at a speed of 30mph.

We need to find the velocity of the ship. It can be calculated by total distance divided by total time taken.

Velocity is a vector quantity i.e. it has both magnitude and direction. On the other hand, the speed has only magnitude (scalar quantity).

In this case it is mentioned that the cruise is travelling south with a speed of 300 mph.

Hence, the velocity is 300 mph in South direction.

How did chemists change Mendeleev's periodic table in the early 1900s?

Answers

Answer:

They used atomic number instead of atomic mass to organize the elements. From an element's location in the periodic table, you can predict: ... The elements have similar properties.

27. How was the design of the Chernobyl plant different than most modern reactors?
a. The containment building had a dome shape to minimize impact of explosion.
b. The plant was built close to a river to have a constant supply of fresh water.
c. Graphite was used instead of water as a moderator solution in the reactor.
d. The plant design was not significantly different than other reactors.

Answers

Answer:

I think its C

Im not sure tho hehe

Have ya helped anybody out today, how? And good job!

Answers

Answer:

I helped take care of my baby cousin :)

Explanation:

Predict the balanced product for the acid base reaction of phosphoric acid with ammonium hydroxide.

Answers

Answer:

htt ps://w ww.you  tube. com/watch?v =oyy377 Yoj4I

Explanation:

I really need your guys help, I need to pass.​

Answers

Answer:

Question 4 is 291.0346

Explanation:

What are the principal energy level? And what do they represent?

Answers

Answer:

the principal energy level of an electron refers to the shell or orbital in which the electron is located relative to the atoms nucleus. the first element in a period of the periodic table introduces a new principal energy level.

Explanation:

the electrons surrounding an atom are located in region around the nucleus called "energy level".

what is the anwser to this question

Answers

you didn't show the question

Answer:

N/A

Explanation:

"what is the anwser to this question" Is Not Available because this no question.

Please like this.

PLEASE HELP I'M BEING TIMED!! Which type of star system has the most stars?
A. Open Cluster
B. globular cluster
C. Eclipsing binary
D. binary star system ​

Answers

Answer:

Hi! It's B - globular cluster

Answer:

B Globular Cluster

Explanation:

Sorry if I am wrong :)

What is the proper value for F in the above table? A. 28 B. 30 C. 2+ D. 2-

Answers

Explanation:

charge = proton - electron

charge = 65-63

charge = +2

Answer:here is ur answer....

Explanation:

C) 2+

HELP!!! 2Mg+O2->2MgO
What are the products of this reaction??
WILL GIVE BRAINLEST​

Answers

Answer:

the products which is formed in the given reaction is MgO ( magnesium oxide )

Explanation:

when magnesium metal reacts with oxygen present in air it burns with a white dazzling flame

to form white powder of magnesium oxide (MgO)

here's the balanced chemical reaction for it

2Mg+O2->2MgO

HELP HELP HELP HELP HELP HELP HELP

Answers

Well, the answer to this question is B.
Also, I just want to say Happy new year to you and have a great rest of your day!
Also, can you please mark my answer as the brainliest answer?
Thank you!

A bicyclist has a mass of 112 kg. In which of the following situations will the cyclist have the most kinetic energy?

A) 10 km / hr.
B) 12 km/hr
C) 14 km / hr
D) 16 km/hr​

Answers

Answer:

D) 16 km/hr​

Explanation:

When the speed increases, the kinetic energy increases, but the mass never changes.

Answer:

d

Explanation:

Calculate the pH after 0.13 mol NaOH are added to 1.00 L of 0.50M HC2H3O2 and 0.80M NaC2H3O2 buffer solution, Ka= 1.3 x 10^-5. I really need help, I'm struggling with this topic.

Answers

Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green

hoped I helped

Please help!!! I'll give brainliest to the most helpful answer
please this is due today and I have no idea :// 3

Answers

87) A
88) D
89) B
90) E
91) C

1. Which term best describes ultraviolet radiation?
a. Harmless
b. Invisible
c. Undetectable d. Beneficial

Answers

The answer is invisible I think, don't hate if I'm wrong

Question 10
Which of the following is a sign that you might be in an extremely unsafe situation?
A) you see frayed electrical cords on the machine you are asked to use
B) other workers are getting burned on the fryer that you are supposed to use
C) you are shown a forklift truck - something you have never operated before -
and told to move a heavy load of materials across the warehouse floor
D) only a) and c)
E) all of a), b), and c)

Answers

Answer:

Here it would be A,B and C because all the examples are violating safety precautions. They are all examples of un safe signs.

Hope this helps

Explanation:

How many molecules are in 50.00 grams of sucrose, C12H22O11

Answers

Answer: Well take this for an example and see if it helps with 50 grams of sucrose

Explanation:

Explanation:

And we have to calculate the number of moles of sucrose present in a  

lb

mass of sucrose:

Moles of sucrose

=

454

⋅

g

342.30

⋅

g

⋅

m

o

l

−

1

=

1.33

⋅

m

o

l

.

Now it is a fact that in a  

mole

of stuff there are  

6.022

×

10

23

individual items of stuff.........

So  

1.33

⋅

m

o

l

×

6.022

×

10

23

⋅

m

o

l

−

1

≅

8

×

10

23

 

individual

 

sucrose molecules

how can a substance stay at a certain temperature even though it is being heated?​

Answers

The temperature of a certain substance can be seen as the average speed of the atoms or molecules in that substance. In the liquid state of a substance the forces between the atoms or molecules are strong enough to keep them together, however with enough freedom to move, unlike in the solid state. If we would have a closer look at the surface of a liquid from sideways, we would see water molecules jumping out of the water and reentering it again. The lower the water temperature would be the lesser the amount of water molecules leaving the liquid phase would be. If water would be heated up and the temperature will reach 100 degrees C at normal atmospheric pressure, more water molecules would leave the water than reentering. Boiling has started. The temperature of the water remains at 100 degrees C, if the heating continues as the average speed of molecules will not increase, only the rate of molecules leaving the water will increase, until all the water in liquid state has been vapourized. The amount of heat needed to vapourize liquid water is called latent heat. Latent heat is a very important driving factor in the atmosphere and thus the weather.

Which of the following could be the speed of an object at rest?

0 m/s


-4 m/s


20 m/s

1 m/s

Answers

Answer:

0 m/s

Explanation:

An object at rest stays at rest unless acted upon therefore it can only be 0.

What are groups of particles held tightly together called?

Answers

It would be solids since it is stable and has a definite volume and shape so particles cannot move freely.

Which circuit hook-up design will have the brightest light bulb?A - 1 battery 1 bulb, B - 2 batteries 1 bulb, C - 3 batteries one bulb, D 2 batteries the bulb is on the other end, E 1 battery and 1 bulb on the other end

Question 5 options:

A


B


C


D


E

Heres another for you guys!

Answers

Answer:

I believe it is E because the battery has a wire, a power source(the battery), and a bulb connected together thus making a full series circuit. Furthermore, the more batteries they are to a series circuit, the more dimmer the light bulbs will be.

5) Chlorine has 7 valence electrons. Neon has 8 valence electrons. Which on is more likely to undergo a
chemical reaction, and why?

Answers

Answer:

well, chlorine will undergo in a chemical reaction

Explanation:

neon has completed valence shells, so it neither need electron and or it also don't need to donate the electrons. hence it will not participate in any chemical reaction and it is stable in nature.

whereas chlorine need one more electron to complete it's valence shell and in order to be stable , so it will try to gain one electron , hence

it will take place in a chemical reaction

PERIODIC TABLE
What element is located at the period 3, group 13?

Answers

Answer:

Aluminiun

Explanation:

PLEASE HELP ME FILL IN THE BLANKS

Answers

Answer:

The order the words go for the blanks

Explanation:

Interia

Rest

Constant

Unbalanced

Balanced

Distance

Someone please answer this...

Answers

Answer:

5446.8 J

Explanation:

From the question given above, the following data were obtained:

Mass (M) = 50 g

Initial temperature (T₁) = 70 °C

Final temperature (T₂) = 192.4 °C

Specific heat capacity (C) = 0.89 J/gºC

Heat (Q) required =?

Next, we shall determine the change in the temperature. This can be obtained as follow:

Initial temperature (T₁) = 70 °C

Final temperature (T₂) = 192.4 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 192.4 – 70

ΔT = 122.4 °C

Finally, we shall determine the heat required to heat up the block of aluminum as follow:

Mass (M) = 50 g

Specific heat capacity (C) = 0.89 J/gºC

Change in temperature (ΔT) = 122.4 °C

Heat (Q) required =?

Q = MCΔT

Q = 50 × 0.89 × 122.4

Q = 5446.8 J

Thus, the heat required to heat up the block of aluminum is 5446.8 J

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