How can I solve this pls

How Can I Solve This Pls

Answers

Answer 1

Explanation:

A= Mercury (ll) oxide

B= Mercury and Oxygen

This is an oxidation-reduction (redox) reaction:

2 HgII + 4 e- → 2 Hg0

(reduction)

2 O-II - 4 e- → 2 O0

(oxidation)

HgO is an oxidizing agent, HgO is a reducing agent.

Answer 2
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Related Questions

cultura de Australia ?​

Answers

La cultura de Australia es una cultura occidental derivada principalmente de Gran Bretaña, pero también influenciada por la geografía única del continente australiano, la diversa aportación de aborígenes, isleños del Estrecho de Torres y otros pueblos de Oceanía. ... Los australianos son generalmente relajados, abiertos y directos.

Describe the surgery that would be used to treat Kayla's condition. What are the risks of the surgery?

Answers

Answer:

By pass surgery.

Explanation:

Kayla is suffering with blocked artery. The doctors have tried to open up her blocked artery with injecting the stunt by angioplasty process. The treatment had been unsuccessful and she is still complaining chest pain. The next move of the doctors would be by pass surgery which will open up the blocked artery. There are many risks involved in this surgery. The patient may get into coma due to excess bleeding or she may die if her blood pressure shoots up during surgery.

An atom of an element contains 12 protons, 12 neutrons, and 12 electrons. This element is in Group A) 1 B) 2 C) 6 D) 18

Answers

Answer:

B) 2

Explanation:

This is because the element in discussion is magnesium which has 12 protons and it falls in group 2 (the second column in periodic table)

3 L of a gas at 250 K is changed to a temperature of 300 K. What is the final volume?

Answers

Answer:

you can simply answer vl\t1=v2/t2

An airplane starts at rest and accelerates down the runway for 20 sec. at the end of the runway, its velocity is 80m/sec. What is its acceleration?

Answers

Answer:

The correct answer is - 4 m/s

Explanation:

Given:

time = 20 sec

velocity= 80 m/s

Accelaration = ?

Solution:

formula for the accelaration can be drive from the for

vi = vf + ( a.t)

0 m/s (rest) = 80 m/s + (a.20s.-1)

a.20.-1= -80,

we check if this is true;

0 m/s= 80 + -80 = 0 so its true.

so a.20.-1= -80,

a= 80/20 ,

Thus, the correct answers a = 4 m/s

Does anyone have the chemistry paper 1 higher 2019 mark scheme thank you

Answers

no

Explanation:

i simply answered the question

you didnt ask for it you simply asked if i had it

being mad is no use, same with reporting and taking this down

in thoery my answer is correct

so, dont get mad, dot report, dont take this down

this is my protest

how many moles are in 456 g of CaCO3

Answers

Answer:

4.556 moles

Explanation:

mole=mass/ molar mass

mole= 456/100.08

mole= 4.556


If a .05 gram pill of aspirin is dissolved into 50 grams of water, what is the
percent by mass concentration of aspirin in water?

Answers

Answer:

0.10 % w/w

Explanation:

The percent by mass (%w/w) is defined as one hundred times the ratio between the mass of solute (In this case aspirin, 0.05g) and the mass of solution (Mass solute + mass of water = 0.05g + 50g = 50.05g). The percent by mass is:

0.05g Aspirin / 50.05g * 100 =

0.10 % w/w

During photosynthesis, plants incorporate atmospheric
Cinto more complex energy-storage
molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light
energy into
energy stored in the molecules.

Answers

Answer:

carbon dioxide

oxygen

**

During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.

What is Photosynthesis ?

It is the process by which plants , algae and some bacteria uses water from the carbon dioxide, air and soil and in this process food is prepared in the presence of chlorophyll and sunlight. In this process light energy converted to chemical energy.

Thus, we can say that During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.

Learn more about the Photosynthesis here: https://brainly.com/question/19160081

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32 pts (Help Ive been desperately waiting for a hour plz answer) What are the units of Specific Heat?

A. temperature

B. density

C. mass

D. energy

Answers

Answer:

D

Explanation:

If I am not mistaken the unit is Joules which is a unit of Energy.

Answer:

A C and D. (The one that isn't is density).

Explanation:

I don't think you are going to like the answer very much. The definition tells you that Specific heat has units of

Joules/(°Kelvin * mass in kg)

The reason you won't like this much is because there are three answers

temperature: °KEnergy: JoulesMass: kg

You won't be able to separate them. Once in a while you get a question like this where the asker didn't know the subject matter well, but was likely a good programmer.

Which of the following molecules is polar?
CH3F
CF4
CCl4
All of the molecules are polar.

Answers

Answer:

CH3F

Explanation:

because if drawn out its is asymmetric

32.) What charge would you expect from a Group 17 atom when it becomes an ion?

a.) 1-
b.) 2-
c.) 2+
d.) 1+

Answers

Answer: 1-

Explanation: Atoms of group 17 gain one electron and form anions with a 1− charge; atoms of group 16 gain two electrons and form ions with a 2− charge, and so on

What is the approximate vapor pressure when the gas condenses at 70°C?
150
5
760
380

Answers

Answer:

380

Explanation:

I couldn't find the answer anywhere so this is the correct answer. I got it graded.

B 1. What type of signal is represented by discrete values?
A analog
B continuous
C sine wave
D digital​

Answers

Answer:

digital signal is the answer

How symbols are made?

Answers

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

What’s the charge on the ions formed by group 7 elements? (GCSE)

Answers

The answer to this question is:
1-

2Na + 2H2O --> 2NaOH + H2 How many moles of NaOH can be produced from 7.0 moles of Na Find theoretical yield in moles PLSS HELP ME SOMEBODY 3

Answers

Answer:

[tex]n_{NaOH}=7.0molNaOH[/tex]

Explanation:

Hello there!

In this case, according to the given information about this problem, we first consider the given chemical reaction:

2Na + 2H2O --> 2NaOH + H2

Whereas there is 2:2 mole ratio of NaOH to Na; thus, we calculate the required theoretical yield of NaOH in moles as shown below:

[tex]n_{NaOH}=7.0molNa*\frac{2molNaOH}{2molNa} \\\\n_{NaOH}=7.0molNaOH[/tex]

Regards!



PLEASE ANSWER I GIVE BRAINLIEST AND MAX POINTS

Answers

Answer:

I believe the answer is A (changes in air temperature  result in differences in air pressure which causes wind). Hope this helps

Explanation:


The one factor that a scientist changes during an experiment.

Answers

Answer:

The independent variable


1. How are rates of chemical change expressed?​

Answers

Explanation:

The rate of reaction is expressed as decrease in concentration of reactant or increase in product per unit time. It is also defined as the increase of concentration of the product per second.

Answer:

Explanation:

Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. ... It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.

I HOPE I HELPED PLZ GIVE A THANKS,RATE AND MARK ME AS BRAINIEST.

What is the rate of diffusion of NO gas to CO gas?

Answers

Answer:

0.97

Explanation:

Let R₁ represent the rate of diffusion of NO.

Let R₂ represent the rate of diffusion of CO.

Molar mass of NO (M₁) = 14 + 16 = 30 g/mol

Molar mass of CO (M₂) = 12 + 16 = 28 g/mol

Thus, the rate of NO to CO can be obtained as follow:

R₁ /R₂ = √(M₂/M₁)

R₁ /R₂ = √(28/30)

R₁ /R₂ = √(28/30)

R₁ /R₂ = 0.97

R₁ : R₂ = 0.97

NO : CO = 0.97

Therefore, the rate of diffusion of NO to CO is 0.97

what is acid? Explain it​

Answers

Answer:

An acid is a chemical that  is posining or sometimes not

Explanation:

This is the best I could explain brainliest

The total mass of reactants and products is _______ during a chemical reaction

Answers

Answer: The total mass of reactants and products is the same during a chemical reaction.

Explanation:

the total mass of reactants is equal to the total mass of products.

The saturation point for a solution is 50.0 grams of solute per 500. grams of solvent. If you pour 70.0 grams of
solute into 800. grams of solvent, how many more grams of solute can you dissolve before reaching saturation?

Answers

Answer:

10.0g of solute before reaching saturation

Explanation:

A saturated solution is the solution that contains the maximum amount of solute that can be dissolved. In the problem, you can have

50.0g of solute / 500.0g Solvent

Now, in 800.0g solvent you can dissolve:

800.0g Solvent * (50.0g solute / 500.0g Solvent) = 80.0g of solute can be added

As you dissolve initially 70.0g of solute. You can add:

80.0g - 70.0g =

10.0g of solute before reaching saturation

You have 1.29 moles of hydrogen peroxide, H2O2. How many grams is this?

Answers

Answer:

m = 43.87 grams

Explanation:

Given that,

Number of moles, n = 1.29 moles

The molar mass of H₂O₂ is, M = 34.0147 g/mol

We know that,

[tex]n=\dfrac{m}{M}[/tex]

Where

m is mass of H₂O₂

So,

[tex]m=n\times M\\\\m=1.29\times 34.0147 \\\\m=43.87\ g[/tex]

So, there are 43.87 grams of H₂O₂.

High levels and long periods of stress can increase a person’s risk for many diseases.

True

False

Answers

Answer:

true

Explanation:

How many moles of gas would you have if you have a volume of 38.0 L under a pressure of 1430 mmHg at standard temperature

Answers

Answer: There are 3.2 moles of gas if you have a volume of 38.0 L under a pressure of 1430 mmHg at standard temperature.

Explanation:

Given: Volume = 38.0 L

Pressure = 1430 mm Hg (1 mm Hg = 0.00131579 atm) = 1.9 atm

Temperature = 273.15 K

Using ideal gas equation, the moles of gas will be calculated as follows.

[tex]PV = nRT\\[/tex]

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T =temperature

Substitute the values into above formula as follows.

[tex]PV = nRT\\1.9 atm \times 38.0 L = n \times 0.0821 L atm/mol K \times 273.15 K\\n = \frac{1.9 atm \times 38.0 L}{0.0821 L atm/mol K \times 273.15 K}\\= 3.2 mol[/tex]

Thus, we can conclude that there are 3.2 moles of gas if you have a volume of 38.0 L under a pressure of 1430 mmHg at standard temperature.

1. Which of the following factors does not affect the voltage produced in a voltaic cell?

A. concentrations of lons

B. pressure

C. metal of the electrodes

Answers

It will be B cause pressure doesn’t do anything

The voltage is the potential difference between the two ends of the conductor. The factor that does not affect the voltage produced in a voltaic cell is pressure. The correct option is B.

What is a Voltaic cell?

A voltaic cell uses a chemical reaction to convert electrochemical energy to electrical energy. It consists of cathode and ions which flow through the cathode and anode.

The pressure has nothing to do with the Electrochemical devices.

The factor does not influence the voltage produced in a voltaic cell is pressure. The correct option is B.

Learn more about Voltaic cell.

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PLEASE ANSWER QUICKLY!! LOTS OF POINTS!❤

Phosphorous has two common isotopes, phosphorous - 30 and phosphorous - 31. Using the periodic table what can you infer about these two isotopes?​

Answers

Explanation:

The idea here is that you need to use the Periodic Table of elements to find the mass number of the most common isotope of phosphorus, P.

4 How can three liquids form something that resembles a solid? (Slime)

Answers

Answer:

Three liquids can form something that will resemble into a solid because it depends on which liquids you use and because  all three things can work together to make it into a solid with the ingredients that are in all three liquids they will make into a beautiful piece.

Explanation:

This is the correct answer!!

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