Only smart people can answer 50points

Only Smart People Can Answer 50points

Answers

Answer 1
M1V1=M2V2

We need M2

25(0.5)=100M212.5=100M2M2=12.5/100M2=0.125M

Related Questions

Changes in which measurement do not shift the equilibrium of a chemical system?

A.) temperature
B.) time
C.) pressure
D.) concentration

Answers

Explanation:

i think time. .........

Changes in time do not shift the equilibrium of a chemical reaction.

What is equilibrium?

Chemical equilibrium is the state where no net change in the quantity of reactants as well as products occurs during a reversible chemical reaction. A reversible chemical reaction occurs when the products react with the original reactants as soon as they are generated.

What is chemical reaction?

A chemical reaction occurs when one or more compounds, known as reactants, are changed into one or more distinct substances, known as products. Chemical elements or compounds are examples of substances. A chemical reaction organizes the constituent atoms of both the reactants to produce various products.

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Each element in the periodic table can be represented by a chemical symbol. Match each element to its chemical symbol.
Na
N
H
Cl
Hg
Mercury
arrowBoth
Sodium
arrowBoth
Nitrogen
arrowBoth
Chlorine
arrowBoth
Hydrogen
arrowBoth

Answers

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The Correct pair of Element and it's symbol ~

Mercury - Hg

Sodium - Na

Nitrogen - N

Chlorine - Cl

Hydrogen - H

Calculate the volume (in cm3) that 4. 00 cm3 of gas at 30 oC will occupy at 130oC when the pressure is kept constant

Answers

The volume of the gas is 5.32 cm³.

To calculate the volume of the gas, we use Charles' law.

Charles' law

Charles' law states that at constant pressure, the volume of a fixed mass of gas is directly proportional to its absolute temperature. This can be expressed mathematically as

Formula:

V/T = V'/T'............. Equation 1

Where:

V = Initial volume of the gasV' = Final volume of the gasT = Initial temperature of the gasT' = Final temperature of the gas.

Make V' the subject of the equation.

V' = VT'/T......... Equation 2

From the question,

Given:

V = 4 cm³T = 30 °C = 303 KT' = 130 °C = 403 K

Substitute these values into equation 2

V' = (4×403)/303V' = 5.32 cm³

Hence, the volume of the gas is 5.32 cm³.

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Can a pressure change shift the equilibrium position in every reversible reaction? Explain

Answers

Answer and Explanation: No, a pressure change cannot shift the position of equilibrium in all reversible reactions.

No, a pressure cannot change shift the equilibrium position in every reversible reaction.

How the pressure affect the reversible reaction ?

If the pressure increases, the position of equilibrium shift in the direction with the small amount of molecules. This decreases the effect of the change. When the reaction will shift towards the products that means the reaction favor forward.

Factors that affect equilibrium position in reversible reaction.PressureCatalystTemperatureConcentration

From the above conclusion we can say that a pressure cannot change the shift of equilibrium position in every reversible reaction.

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What is the total number of atoms in ammonium hydroxide, NH4OH ?

2

4

7

HELP ASAP

Answers

Answer:

7

Explanation:

Number of Nitrogen atoms : 1 atom

Number of Hydrogen atoms : 1(4) + 1 = 4 + 1 = 5 atoms

Number of Oxygen atoms : 1 atom

Total atoms

1 + 5 + 17 atoms
NH_4OH

Calculate atoms of each element

N=1H=4+1=5O=1

Total atoms

1+5+17

Outline the laboratory procedure for preparing a specific volume of a dilute solution from a concentrated stock solution

Answers

The various steps of how to prepare a specific volume of a dilute solution from a concentrated stock solution is described below.

Preparation of a dilute solution from stock solution

A stock solution is the solution that contains the standard concentration of a chemical compound.

A diluted solution is the solution shoes concentration has been decrease through addition of a solvent like water.

To prepare a dilute solution from a stock solution the following is done:

the needed volume of the stock solution is calculated,

the volume is added to a volumetric flask,

water is then added into the volumetric flask till it reaches the calibration line.

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How much heat is required, in calories, to raise the temperature of 57. 8 g of silver from 17. 0degrees C to 43. 5 degrees C, if the specific heat of silver= 0. 057 cal/g degrees C

Answers

8= (57.8g) (0.057calgC) (43.5-17.05)
8=87 cal

PLEASE HELP!!!!!!! SCIENCEE!!!!
THE CHOICES ARE: 1, 2, 3 FOR THE FIRST ONE.
THE SECOND ONE: from a common ancestor, completely independently of each other

Answers

Answer:

a) 1

b) from a common ancestor

Explanation:

pls give brainlyist

What is the name and formula for the most common natural ore for copper?.

Answers

Answer:

Clalcopyrite is the most important and major source of copper material. It is widely spread copper-iron sulfide minerals with chemical formula (CuFeS^2)

The most common natural ore of copper is chalcopyrite with the chemical formula CuFeS₂.

What is chemical formula?

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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How would aluminum and phosphorus form a bond

Answers

Explanation:

Aluminum happens to have 3 extra electron's. luckily, every phosphorus atom is looking to gain 3 electrons. it is a perfect match!!!

what is diffusion ,?? ​

Answers

Diffusion is a process that results from the random motion of molecules and results in a net movement of matter from a high-concentration region to a low-concentration zone.

Diffusion is the net movement of anything generally from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in Gibbs free energy or chemical potential.

PLS HELP I NEED ASAP
what is the slowest speed for an object to escape the gravitational attraction of a celestial body (planet, moon, etc.)?

Answers

Answer:

the escape velocity

Explanation:

To do this, your rock has to go very fast – more than 11 kilometers per second. This velocity is called the escape velocity, the speed an object must achieve in order to overcome the gravitational attraction of a celestial body (be it a planet, a star, or a galaxy) and escape into space

found it online, lol better then nothing


1. As you increase the temperature of a gas in a sealed, rigid con-
tainer, what happens to the density of the gas? Would the results
be the same if you did the same experiment in a container with
a movable piston at a constant external pressure? Explain.

Answers

Answer:

If one increases the temperature of a gas in a sealed, rigid container, the density of gas will not change.

The key to this answer lays in the ideal gas equation:

        pV = nRT

Thus, one can write:  n = (m)/(M)where m is the mass of the gas and M is the molar mass of a gas.  

         pV = (m)/(M) RT

Hence, if one decides to divide the entire equation with volume, V, one may write:

        p = (m)/(VM) RT

ρ = (m)/(V), where ρ is density

        p = (ρ)/(M) RT

If one increases the temperature, in order to keep balance, the pressure will be increased, also.  Container is rigid, so that means the volume is constant.

However, this will not affect the density because there is no difference in volume (V = const.) or the amount of gas (n = const).

If one had a container with a piston, yet, constant pressure, the change of the temperature will impact the density.  

Explanation:


What is the molarity of a methanol solution produced when 0.2 L of a 3 M solution was diluted to 0.8 L?

A-0.2M
B- 0.4M
C-0.75M
D-0.8M

Answers

The molarity of the methanol solution produced at the given number of moles and volume is 0.75 M.

Molarity of the methanol

The molarity of the methanol is determined from the ratio of the number of moles of the methanol to the volume of the methanol.

The molarity of the methanol is calculated as follows;

Molarity = moles/volume

moles = 0.2 L x 3 M = 0.6 mole

Molarity = 0.6 mol/0.8 L

Molarity = 0.75 M

Thus, the molarity of the methanol solution produced at the given number of moles and volume is 0.75 M.

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a balloon flies off when the opening is released a. Newton’s First Law b. Newton’s Second Law c. Newton’s Third Law

Answers

B. Newtons second law! Have a great day!

Why was October 12,1999 a historic day ?

Answers

The United Nations Population Fund designates today in history as the approximate day on which the world population reached six billion.  

:)

What was the initial reactant concentration for the reaction described in part a?.

Answers

Answer:

The integrated rate laws for zero-, first-, and second-order reaction may be arranged such that they resemble the equation for a straight line, y = mx + b. Part A The reactant concentration in a zero-order reaction was 0.100 M after 100 s and 1.50x10-2 M after 360 s. What is the rate constant for this reaction? Order 0 1 | 2 Integrated Rate Law Graph [A] =- kt +[A]o [A] vs. t In[A] = -kt + In[A]o In[A] vs. t = kt + Á A vs. t Slope -k -k k Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash. ► View Available Hint(s) koth = 3.27x10-4 M S Submi Previous Answers Correct Important: If you use this answer in later parts, use the full unrounded value in your calculations.

Explanation:

The Henry's law constant for H2 is 8.1×10−4 Matm at 25∘C. What pressure of hydrogen is needed to maintain a H2 concentration of 0.42 M?

Answers

The pressure of hydrogen needed to maintain a H₂ concentration of 0.42 M is 518.5 atm

Henry's law

This states that the solubility / concentration of a gas in liquids at constant temperature is proportional to its pressure. Mathematically, it can be expressed as

S = KP

Where

S is the solubility / concentration K is the Henry's constant P is the pressure

How to determine the pressure Henry's constant (K) =  8.1×10¯⁴ M/atmConcentration (S) = 0.42 MPressure (P) =?

P = S / K

P = 0.42 / 8.1×10¯⁴

P = 518.5 atm

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Pregnant women are often cautioned against cleaning cat litter boxes. This is because Toxoplasma, an intestinal parasite of cats, can be transmitted from infected feces to the expectant mother and ultimately to the fetus. For these reasons, Toxoplasma is considered

a noninfectious disease.

a communicable disease.

an addictive disease.

a nosocomial disease.

a zoonotic disease.

a necrotizing disease.

Answers

Answer: a communicable disease

Explanation: key word was transmitted and it was transmitted from a INFECTED living thing and then transmitted to another living thing

The substance oxidized causes the other substance to be reduced and is called the:.

Answers

Answer:

Reducingagent

Explanation:

Hope this helps you :)

Pls mark brainliest :P

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`

Tori

Suppose two gasses in a container have a total pressure of 1.20 atm. What is the pressure of gas B if the partial pressure of gas A is 0.68 atm

Answers

Answer:

The partial pressure of gas B is 0.52atm

Explanation:

Pt = Pa + Pb

Pb = Pt - Pa

Pb = 1.20 atm - 0.68 atm

Pb = 0.52 atm

what is 2CO in a chemical formula

Answers

Answer:

Co2

Explanation:

The coefficient 2 is multiplied on the invisible 1 (Co1) so it becomes CO2

Or

2co represents 2 molecule of carbon monoxide

Convert 10.1 kcal to J

Answers

1cal=4.184J

Hence

10.1kcal10.1(1000)cal10100cal10100(4.184)42258.4J

Which is an example of an automatic decision that doesn’t require a lot of thinking?


A. To do homework or not

B. What to buy as a gift for someone

C. What to read

D. Whom to invite to your house to play

Answers

Answer

to do homework or not

Explanation:

you can figure it out in one second

Answer:

To do homework or not

Explanation: You should always do homework or else you get in big trouble

What volume of a o.25m solution can be prepared with 28.5g of k2s molar mass 110.26

Answers

Answer: Can you repost the answer it will not let post my answer

Explanation: pleaee

For a typical human height of 2 meter what is the horizon distance on earth (r=6378) (b mars R=3,340

Answers

For a typical human height of 2m, horizon distance on earth and mars is 5km & 3.7km respectively.

How do we calculate the distance?

Horizontal distance will be calculated as:

D = √h² + 2hr, where

h = height of the human = 2m

r = radius

First we calculate distance on earth where radius of earth is 6378km or 6378000m

D = √(2)² + 2(2)6378000

D = 2√6378001 = 5051m = 5km

Now we calculate distance on mars where radius of mars is 3340km or 3340000m

D = √(2)² + 2(2)3340000

D = 2√3340001 = 3674m = 3.7km

Hence required horizon distance on earth and mars is 5km & 3.7km respectively.

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For a gaseous reaction, N2 + 3H2 gives 2NH3. If 20 ml of nitrogen completely reacts with hydrogen, then what is the volume of produced NH3?​

Answers

given:

N2(g) + 3H2(g) → 2NH3(g)

20ml of nitrogen

to find:

the volume of produced NH3

solution:

So, 1 volume of nitrogen gas reacts with 3 volumes of hydrogen gas to produce 2 volumes of ammonia gas.

For this gaseous reaction in which all the reactants and products are gases we could write a chemical equation:

1 volume N2(g) + 3 volumes H2(g) → 2 volumes NH3(g)

1 volume of N2 is 20 ml so 2 volume of NH3 will be 40 ml .

Then , 20 ml N2 will give 40 ml of NH3

= 40 ml

Why do some scientists have difficulty communicating about their research to nonscientists?

Answers

Answer:

Non-scientists aren't exposed to the information that scientists have in their field of study. Scientists also have their research based on facts, while non-scientists can be biased on their beliefs and chose to ignore data and logic.

HELP PLEASE

Earth seems to be the only planet in our solar system that can support life. Which of these is NOT a reason why life is found on Earth?

Question 3 options:

The presence of water on Earth.


It is the perfect distance from the Sun.


It only has slight surface elevation differences

Answers

Answer:

it only has slight surface elevation differences

Explanation:

What makes the Earth habitable? It is the right distance from the Sun, it is protected from harmful solar radiation by its magnetic field, it is kept warm by an insulating atmosphere, and it has the right chemical ingredients for life, including water and carbon.

Predict the effect of each of the following on the indicated equilibrium system in
terms of the direction of equilibrium shift (forward, reverse, or neither)
H2(g) + Cl2(g) <--> 2HCl(g) + 194 kJ
a) addition of Cl2
b) removal of HCI
c) increased pressure
d) decreased temperature
e) removal of H2
f) decreased pressure
g) addition of a catalyst
h) increased temperature
i) decreased system volume
D

Answers

The effects of each of the following on the equilibrium system in the question are as follows :

A) Addition of Cl₂ ; equilibrium shifts to reverse

B) Removal of HCl ; equilibrium shifts to the reverse

C) Increased pressure ; neither

D) Decresed temperture ; neither

E) Removal of H₂ ; Forward

F) Decreased pressure : neither

G) Addition of catalyst : Forward

H) Increased temperature : Forward

I) Decresed system volume : Neither

Effects on equilibrium system

The change in volume and pressure in an equilbrium system with equal number of gaseous molecules of reactants and products will not have an effect on the direction of shift of the equilibrium system. But the change in temperature, increase or decrease of reactants and products  will have an effect on the direction of the equilibrium shift of the system.

Hence we can conclude that the effects of the following on the equilibrium system is as listed above.

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B1 of a trapezoid in which Area = (48x+68) inch squared, Height = 8 in, B2 = (9x + 12) in.what I have so far is 48x +68 = 8 (B1 + 9x +12)what do I do from there????????????????? the question is asking to solve for Base 1/ B1 Calculate the average change of dissolved oxygen per year in the lake over the course of the study To reduce auto emissions in the United States, modifications to automobile engines have been required since the 1960s.a) trueb) false in a promotion at a local diner ever twelfth customer will get a free hamburger and every ninth customer will get a free milkshake which customer will be first to get a free sandwich and a free drink a Which of the following is a safety precaution to take in order to avoid wildlifeencounters?A. Stay away from food and water sources.B. Only approach young animals.C. Wear scented products.OD. Make as little noise as possible.SUBMIk A person who likes social situations and can lack concentration isA. unstableB. an extrovertC. stableD. an introvert According to the ________ perspective, anxiety is sometimes produced by the submerged mental energy associated with repressed impulses. please helppppppppppppppp!!!!!!!!!!!!!!!!!!!!!11 Zero and Negative Exponents 4-30=_ Find a radius of a circle the length of which is 24 cm. Help me find the perimeter of the shape please! 2. 3x = 18 then the value of x is We are the men.Give me your best cry Ariana is playing a game. For each of her turns, she rolls a number cube landed with the numbers 1 through 6. She also spins the spinner shown below. To win the game Ariana needs to roll a 3 and spin a 3 on her next turn. What is thr probability that Ariana will win the game on her next turn? Look at the political cartoon. an officer in a federal uniform puts himself between a group of african americans and a group of southern whites. both groups look angry and carry weapons. the officer is holding one hand up to hold off the southern whites. the u s flag is in the background behind the officer. the cartoon shows an officer from the federal government protecting southern whites. protecting freed african americans. unable to protect southern whites. unable to protect freed african americans. Explain why the moon appears to be less bright than the sun despite its very close distance to Earth Pietro is measuring the thickness of his favorite books. He rounds his measurements to the nearest \dfrac{1}{8} 8 1 start fraction, 1, divided by, 8, end fraction inch and records the information on the line plot below. A line plot labeled 0 to 2 with tick marks every one-eighth unit. Dots are plotted as follows: 3 dots above one and one-eighth, 1 dot above one and two-eighths, 4 dots above one and five-eighths, 2 dots above one and six-eighths, and 1 dot above the 2. A line plot labeled 0 to 2 with tick marks every one-eighth unit. Dots are plotted as follows: 3 dots above one and one-eighth, 1 dot above one and two-eighths, 4 dots above one and five-eighths, 2 dots above one and six-eighths, and 1 dot above the 2. What is the total thickness of the two thickest books? \text{ inches} inches Doing Philosophy in relation with Ethics An alloy weighing 30 lbs is 119 tin The alloy was made by mixing a 15% tin alloy and a 9% tin allov. How many pounds of each alloy were used to make the 11% alloy? Vanessa wants to play a video game that charges .12 a minute. If ahe has 15.00 to spend how many minutes can she play at most