Answer:
1.875 dm^3
Explanation:
M = moles of solute ÷ volume of solution
M =11.25 x 6
= 1.875 dm^3
2L is the correct answer .
HOW TO CALCULATE ??
Given : moles of solute(n) = 11.25Molarity (M) = 6
To Find : Volume of the solution (v) = ?Key concept : [tex]M=\frac{n}{V(inL)}[/tex]On puting values and solving we get , V = 1.875 L ≈ 2L
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Help me Look at the pictures!!!! Past due!
Make an explanation of how my hypothesis is not supported.
Answer:
Explanation:
the temperture of the warmer water will make it have more space and have less density in the water.
PLS HELP ON A TIMER!
if the pressure exerted by a sample of carbon dioxide at 25° C in a volume of 0.44L is 3.81 atm, what is the mass of the carbon dioxide?
A. .0685
B. 1.65
C. 3.02
D. 14.4
Answer:
3.02
Explanation:
Please help me with number 43
Answer:
The reason why atomic mass is usually not a whole number is because it is a weighted average of the mass numbers of isotopes
Explanation:
What type of reaction does this illustration represent?
A. synthesis
B. decomposition
C.single-replacement
D.double replacement
Answer: IS B
Explanation:
Decomposition
Question 2(Multiple Choice Worth 2 points)
(04.06 LC)
The properties of elements can be predicted by which of the following?
Where it is on the periodic table
Where it was discovered
Its color in its natural state
Its name
Answer:
location on the periodic table
Explanation:
A 25.0 L tank of nitrogen gas is at 25 oC and 2.05 atm . If the temperature stays at 25 oC and the volume is decreased to 14.5 L , what is the new pressure?
Answer:
[tex]\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}[/tex]
Explanation:
In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:
[tex]P_1V_1=P_2V_2[/tex]
Now we can substitute any known values into the formula.
Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.
[tex]25.0 \ L * 2.05 \ atm = P_2V_2[/tex]
The volume is decreased to 14.5 liters, but the pressure is unknown.
[tex]25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L[/tex]
Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .
[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}=\frac{P_2 *14.5 \ L}{14.5 \ L}[/tex]
[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}= P_2[/tex]
The units of liters cancel.
[tex]\frac {25.0 * 2.05 \ atm }{14.5 }=P_2[/tex]
[tex]\frac {50.25\ atm }{14.5 }=P_2[/tex]
[tex]3.53448276 \ atm = P_2[/tex]
The original values of volume and pressure have 3 significant figures, so our answer must have the same.
For the number we found, that is the hundredth place.
3.53448276The 4 in the thousandth place (in bold above) tells us to leave the 3 in the hundredth place.
[tex]3.53 \ atm \approx P_2[/tex]
The new pressure is approximately 3.53 atmospheres.
A gas has a volume of 62.65 L at stp. At what temperture in C would the volume of the gas be 78.31 at a pressure of 612 mm hg
Answer:
1.79°C
Explanation:
Applying,
PV/T = P'V'/T'................. Equation 1
Where P = Initial presssure, V = Initial volume, T = Initial temperature, P' = Final pressure, V' = Final volume, T' = Final Temperature.
make T' the subject of the equation
T' = P'V'T/PV................ Equation 2
From the question,
Given: P = 760 mmHg (Standard pressure), T = 273 K (Standard temperature), V = 62.65 L, P' = 612 mmHg, V' = 78.31
Substitute these values into equation 2
T' = (612×78.31×273)/(760×62.65)
T' = 274.79 K
T' = (274.79-273) °C
T' = 1.79°C
What is the relative humidity if the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C ?
Answer:
39%
Explanation:
The Dry Bulb Temperature (also known as air temperature) is the ambient air temperature.
The Wet Bulb temperature is the temperature of adiabatic saturation.
The relative humidity is the amount of water vapor in the air. The relative humidity can be gotten from the dry bulb and wet bulb temperature. The difference between the wet bulb and dry bulb temperature as well as the dry bulb temperature is used to determine the relative humidity with the help of a Psychrometric Chart
Given that the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C. From the chart:
Relative humidity = 39%
Answer:
39% I believe is correct.
Vhat are some of the benefits and drawbacks of recycling?
Answer:
benefits: can help reduce waste in land fills, and promotes reusability (turned into different products)
drawbacks: can be much more expensive to salvage than to just throw it in a landfill, and most of the time products cannot be recycled effectively due to its material.
Are elements and compounds the same thing?
Answer:
no
Explanation:
a compound is a mixture of two or more elements while a element is by itself.
Answer:
no
Explanation:
elements are their purest form. compunds are a mix of mutiple elements.
the chemical symbol of sodium is
Answer:
Na
Explanation:
1. Observa y completa los neutrones se encuentran ----------------- A. Girando alrededor d las orbitas B. Fuera del nucleo C. En las orbitas del nucleo D. Dentro del nucleo
Answer:
Los neutrones se encuentran dentro del núcleo.
Explanation:
Un átomo es la parte más pequeña de materia que puede combinarse químicamente con otro y mantiene todas las propiedades de un elemento.
Los átomos se combinan para formar moléculas que luego interactúan para formar sólidos, líquidos y gases.
Su estructura está compuesta por diferentes combinaciones de tres sub-partículas: los neutrones, los protones y los electrones. A su vez posee dos regiones diferentes: el núcleo, donde están los protones y los neutrones, y la nube u orbitales electrónicos, donde se encuentran los electrones.
Entonces, los neutrones se encuentran dentro del núcleo.
what happens during a physical change?
A. New substances are formed
B. The identity of the substance is changed
C. A chemical reaction occurs
D. A substance may look different, but has not changed its identity.
Answer:
D
Explanation:
Hope this helped!
Help calculate the density and please type it like this and explain how you got the answer thanks
Mass:
Volume;
Density:
Answer: 2.5
Explanation:
density= 2.5
mass= 62.5 or 62.50
volume= 25 ( 75-50= 25)
so divide 62.5( or 62.50) by 25 which will led you to 2.5
what is a chromatogram?
please help me out
Thank you
Answer:
a visible record (such as a series of colored bands, or a graph) showing the result of separation of the components of a mixture by chromatography.
Explanation:
Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which is fixed a material called the stationary phase.
Answer:
Chromatography is a technique used to separate mixture of chemical substances into its individual compounds.
Explanation:
HELP ME PLEASEEEEE its chem
1. The thermal waters of a spring have a hydronium ion (H3O+) concentration of 2.00 x 10-6 M. Calculate the pH of the water.
2. Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industrial chemical. Vinegar is dilute acetic acid, often produced by fermentation. The following is a reversible reaction:
CH3COOH ↔ H+ + CH3COO–
• Write the set up you would use to calculate the Ka of this reaction.
• Calculate the hydrogen ion concentration [H+] of a 0.1 M solution of acetic acid given that the dissociation constant of acetic acid is Ka = 1.8 x10–5. Work must be shown to earn credit.
3. Describe the reaction of a strong acid and a weak base. In general, what will the final pH be when the reaction between equal moles of a weak acid and a strong base is complete? Explain your answer.
Answer:The thermal waters of a spring have a hydronium ion (H3O+) concentration of 2.00 x . 2. Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industrial chemical.Have a hydronium ion (H3O+) concentration of 2.00 x 10-6 M. Calculate the pH of the water.
Explanation: The thermal waters of a spring have a hydronium ion (H3O+) concentration of 2. spring have a hydronium ion (H3O+) concentration of 2.00 x 10-6 M. Calculate the pH of the water. 2. Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industrial chemical.
balance FeCl3 + MgO ---> Fe2O3 + MgCl2
Answer: The balanced equation is [tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex]
Explanation:
The given reaction equation is as follows.
[tex]FeCl_{3} + MgO \rightarrow Fe_{2}O_{3} + MgCl_{2}[/tex]
Here, number of atoms present on reactant side are as follows.
Fe = 1Cl = 3Mg = 1O = 1Number of atoms on product side are as follows.
Fe = 2Cl = 2Mg = 1O = 3To balance this equation, multiply [tex]FeCl_{3}[/tex] by 2 and MgO by 3 on reactant side. Also, multiply [tex]MgCl_{2}[/tex] by 3 on product side. Therefore, the equation can be rewritten as follows.
[tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex]
Hence, number of atoms on reactant side are as follows.
Fe = 2Cl = 6Mg = 3O = 3Number of atoms on product side are as follows.
Fe = 2Cl = 6Mg = 3O = 3Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.
Thus, we can conclude that the balanced equation is [tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex].
How will an ecysosyem's population be impacted if humans clear out all of the trees?
NO LINKS YOU WILL GET REPORTED!!!
WORD ANSWERS ONLY
Answer:
Without trees formerly forested areas would become drier and more prone to extreme droughts. When and if rain did come flooding would be disastrous and massive erosion would impact oceans smothering coral reefs and other marine habitats
Explanation:
hope this helped (:
Please helppppp!!! I have 10 minutes left!!!
Answer:
I think it's the ash can mix with rivers to form mudflows
Which statement is true about the rotational period of the moon?
greater than the revolution period around Earth
always changing
less than the revolution period around Earth
equal to the revolution period around Earth
The statement is true about the rotational period of the moon " the rotational period of the moon is equal to the revolution period around Earth."
What is rotational period?A celestial object's rotation period may relate towards its sidereal rotation period, which is the time it takes for the object to complete one revolution around in its axis of rotation in sidereal seems like to the background stars.
What is revolution period?The orbital period is also known as the revolution period. it takes for one astronomical object to complete one cycle around another. It refers to planets and asteroids orbiting the Sun, moons orbiting planets, planetary systems orbiting other stars, or double stars in astronomy.
What is moon?In the night sky, the moon is just the brightest object. The moon doesn't at all produce its own light. It has no radiance. That is visible because the sun's light bounces off of it.
The rotational period of the moon is equal to the revolution period around Earth because the moon's rate of spin becomes tidally locked to its rate of revolution, it maintains the same face oriented towards the Earth In other words, every time the moon rounds the Earth, it rotates exactly once.
Therefore, the rotational period of the moon is equal to the revolution period around Earth will be correct answer.
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When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas write the balanved equation
Answer: When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].
Explanation:
The word equation is given as maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas.
Now, in terms of chemical formulae this reaction equation will be as follows.
[tex]MnO_{2} + HCl \rightarrow H_{2}O + MnCl_{2} + Cl_{2}[/tex]
Here, number of atoms on reactant side are as follows.
Mn = 1O = 2H = 1Cl = 1Number of atoms on product side are as follows.
Mn = 1O = 1H = 2Cl = 4To balance this equation, multiply HCl by 4 on reactant side and multiply [tex]H_{2}O[/tex] by 2 on product side. Therefore, the equation can be rewritten as follows.
[tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex]
Hence, number of atoms on reactant side are as follows.
Mn = 1O = 2H = 4Cl = 4Number of atoms on product side are as follows.
Mn = 1O = 2H = 4Cl = 4Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.
Thus, we can conclude that when maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].
WILL MARK BRAINLIEST
What is the oxidation state of Carbon in CaC2O4?
Answer:
The oxidation state of carbon in CaC204 is 3
Answer:The oxidation number of the carbons + the oxidation numbers of the oxygens must equal -2. Carbons + (-8) = -2 so the oxidation number of the carbons must be +6. Since there are 2 carbon atoms each must contribute +3 each. What is the oxidation number of S in Na2S2O3?
Explanation:
The oxidation state of Oxygen is -2 and that of Calcium is +2. There are four oxygen atoms which amounts to -8 charge. This leaves a charge of +6 on Carbon
can someone answer dis:
1) The atomic number of an element shows how many ___________ there are in its atoms.
thankss
I think that the answer is protons
The graph shows the speed of a car
traveling east over a 12 second
period. Based on the information in
the graph, it can be concluded that
in the first 6 seconds, the car is -
A changing its direction.
B experiencing less and less
friction.
moving at a constant speed
D climbing a steep incline.
Answer:
Letter B.
Explanation:
Changing its direction and climbing a steep incline can't be proven only by the graph info. You can see that it's speed isn't constant in the graph.
We have letter B left.
Explain the process of fermentation.
Answer:
Fermentation, chemical process by which molecules such as glucose are broken down anaerobically. More broadly, fermentation is the foaming that occurs during the manufacture of wine and beer, a process at least 10,000 years old. The frothing results from the evolution of carbon dioxide gas, though this was not recognized until the 17th century.
Explanation:
looked it up-
Answer:
like babies or milk and cheese?
Explanation:
Which model illustrates a compound A, b, c, d,
Answer: C
Explanation: I have the same question, it’s for summit, my teacher helped me with this question :)
PLS HELP THIS IS SCIENCE !!
IGNORE THE QUESTIONS I ACCIDENTLY PRESSED ON
Answer:
10.)14
Explanation:
MARK AS BRAINLEST!!
Answer:
where is the answer??
Please do not just take the points without answering the question.
How does increasing temperature affects reaction rate?
Soda water is water that has bubbles of carbon dioxide in it,
soda water is…
a) mixture
b) a molecule
c) an element
d) a compound
Answer:
it is a mixture.
Explanation:
Soda water is a solution of water (H2O) and carbon dioxide (CO2). It has a variable composition and there are not chemical bonds involved.
There is some chemical reaction between CO2 and H2O, producing some carbonic acid H2CO3. This is what gives a slight acidity to soda water.
The correct option for the given question about Mixtures is Option A) Mixture
Why Soda water is a mixture?A mixture of water (H2O) and carbon dioxide is soda water (CO2). There are no chemical bonds present, and it has a variable composition.
It is also called carbonated water as CO2 is first compressed and then get dissolved in it.
The chemical interaction between CO2 and H2O results in the production of H2CO3, a carbonic acid. This is what gives soda water a little acidity.
If the water is somewhat cold in temperature, gas can dissolve in it. The less soluble gas is, the hotter the water is. Additionally, more gas may dissolve in water at greater pressures for the water and gas combination.
Thus we can conclude that Soda water is a homogenous mixture of water and carbon dioxide.
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put have has or had where appropriate in the following sentence, Exam malpractices_______become a serious issue
Answer:
has
Explanation:
has
Answer:
has
Explanation: