Answer:
0.2atm
Explanation:
By Boyle's law
P1V1=P2V2
0.5 x 10 = P2 x 25
therefore, P2= 0.2atm
Balance the following chemical equation. Choose the correct coefficients in the balanced equation in order. *
4, 3, 2
2, 4, 2
1, 1, 1
3, 2, 3
Answer: 4,3,2
Explanation:
PLEASE HELP. I WILL GIVE BRAILIEST. I DON'T HAVE TIME PLEASE Which type of reaction does this diagram represent?
C H 3 single bonded to C, which is single bonded above to H and double bonded to O, plus H C N right arrow C H 3 single bonded to C, which is bonded above to H, to the right to O H, and below to C N.
addition
condensation
elimination
substitution
Answer:
addition
Explanation:
Answer:
Explanation:
Edge 2022
How many moles of Ca(OH)2 are needed to make 200.0 mL of 0.250 M solution? Ca(OH)2
Answer:
0.05 moles of Ca(OH)2
Explanation:
The formula for molarity is: mol/L = M
First, convert 200.0 mL to L.
200 mL/1000 = 0.2 L
Next, plug in the values given.
mol/0.2 = 0.250
Rearrange the equation.
mol = 0.2*0.250
mol = 0.05
If you'd like to check it, simply plug in 0.05 to mol and divide it by 0.2. In theory, you should get 0.250.
In the lab you take 50.0 mL of a 40.0 M NaOH solution and then add water to it until it reaches the 500.0 mL mark of the flask. What is the concentration of the new solution?
Answer:
4.00M NaOH
Explanation:
A 50-ml amount of 40.0M NaOH contains
(40.0 mol NaOH/1 L)×(0.0500L) = 2.00 mol NaOH
Adding enough water to make a 500.0 mL NaOH solution, the new concentration of this solution is
2.00 mol NaOH/0.5000 L = 4.00M NaOH
Oxygen has 6 valence electrons. how many hydrogen atoms (who have 1 valence electrons) can bond with it? remember the octet rule.
Answer:
two hydrogen can bonded with oxygen to form H2O
If there were 11.25 moles of solute in a 6.0M solution, what volume would it have?
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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I need help help me out with this plz
Answer:
D good luck on your test
Explanation:
The table below shows the height of a ball x seconds after being kicked.
A 2-column table with 5 rows. The first column is labeled time (seconds) with entries 0, 0.5, 1, 1.5, 2, 2.5, 3. The second column is labeled height (feet) with entries 0, 35, 65, 85, 95, 100, 95.
What values, rounded to the nearest whole number, complete the quadratic regression equation that models the data?
f(x) =
x2 +
x + 0
Based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?
feet
Answer:
-16
81
19
Explanation:
The quadratic regression equation is [tex]y = -16x^2 +81x[/tex], and the estimated height in 0.25 seconds is 19 feet
What are regression equations?Regression equations are used to determine the relationship between sets of data
The dataset is given as:
Time (seconds) Height (feet)
0 0
0.5 35
1 65
1.5 85
2 95
2.5 100
3 95
To determine the quadratic regression equation, we make use of a graphing calculator.
From the graphing calculator, we have the following calculation summary:
a = -16.429
b = 81.071
c = -0.357
A quadratic regression equation, is represented as:
[tex]y = ax^2 + bx + c[/tex]
So, we have:
[tex]y = -16.429x^2 +81.071x -0.357[/tex]
Approximate
[tex]y = -16x^2 +81x[/tex]
The estimated height in 0.25 seconds is:
[tex]y = -16* 0.25^2 +81 * 0.25[/tex]
[tex]y = 19.25\\[/tex]
Approximate
[tex]y = 19[/tex]
Hence, the estimated height in 0.25 seconds is 19 feet
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Research online to find out what the acidity of the rainfall is where you live. If you live in an area which is affected by acid rain, where do you think it is coming from and why?
Write 3-5 paragraphs describing the effects.
If you do not live an area effected by acid rain, choose another city that is effected by acid rain.
Answer & Explanation: Acid rain occurs when sulfur dioxide and nitrogen oxide are released into the air to create a chemical reaction. When the two mix in the air (oxygen), they will get into the water and mix with other pollutants in the air, making acid rain.
Answer:
What is acid rain? Acid rain occurs when sulfur dioxide and nitrogen oxide are released into the air to create a chemical reaction. When the two mix in the air (oxygen), they will get into the water and mix with other pollutants in the air, making acid rain.
What causes acid rain the most? It can be caused by useing nonrenewable resources. Which inclues coal, oil, ect.
What effects can acid rain have? It causes respiratory issues in animals and humans. When acid rain falls down and flows into the rivers and ponds it affects the aquatic ecosystem. It alters the chemical composition of the water, to a form which is actually harmful to the aquatic ecosystem to survive and causes water pollution which can harm our fresh water supply.
Please help ! Thanks you
Answer:
See Explanation
Explanation:
According to Avogadro's law;
V1/n1 = V2/n2
V1 = 5.0 L
n1 = 15.0 moles
V2= ?
n2 = 30.0 moles
V1n2 = V2n1
V2 = 5 * 30/15
V2 = 10 L
2) 1 mole of N2 occupies 22.4 L
3 moles of N2 occupies 3 * 22.4/1 = 67.2 L
3) 1 mole of O2 occupies 22.4 L
x moles occupies 201.6 L
x = 1 mole* 201.6 L/22.4 L
x = 9 moles
4) Density of a gas = mass/volume
Density of a gas = 39.95 g/22.4 L = 1.78 g/L
Many electrical power plants use fossil fuels, a non-renewable resource to produce electricity?
A:Solar energy can be used to push energy along power lines
B:Wind energy can be used to cool overheated electrical lines
C:Moving water can be used to carry electricity to homes and businesses
D:Biomass can be used to generate heat that can be converted into electricity
Answer:
Explanation:
Thermal Power Plants generate electricity by converting heat into electricity, essentially by burning a fuel. ... A coal power plant works in much the same way, but instead of a nuclear reactor heating water to make steam, the heat from the burning coal powers a steam turbine
Answer:
Solar energy can be used to push energy along power lines.
Explanation:
Im Might be wrong, might have to fact check it but im taking the test now so :)
Which intermolecular attractive force results in the highest vapor pressure?
es )
A)
hydrogen bonding
B)
interionic force
dipole-dipole atraction
D)
London dispersion force
Answer:
D)
London dispersion force
Explanation:
The relatively weak dipole-dipole forces and London dispersion forces between molecules results in a much higher vapor pressure compared to ethyl alcohol.
Proponer una propuesta de acción contra la degradación del suelo basándose en tres tipos de argumentos de fuentes confiables
Answer:
Cobertura vegetal, mantillo y piedra triturada.
Explicación:
Para evitar la degradación del suelo, debemos plantar una cubierta vegetal perenne que proteja el suelo de la erosión del viento y el agua sujetándolo firmemente con sus raíces. El mantillo también se usa para prevenir la erosión del suelo. En aquellas zonas donde la cobertura vegetal no es posible, tenemos que utilizar piedras trituradas para cubrir el suelo con el fin de evitar el contacto directo con el viento. Entonces, estas acciones pueden prevenir la degradación del suelo y mantener el suelo en su estado original.
All of the following are empirical formulas except:
C2H3O2
C6H6
CHO2
CH2O
What is the correct unit for M1 and M2?
Answer:
M1 and M2 are the masses of two. objects exerting the force on each other, and R is the distance. between their centers.
Explanation:
M1 and M2 are the masses of two. objects exerting the force on each other, and R is the distance. between their centers.
What molar concentration (molarity) results when 1.28 L of 14.38 M HCl is diluted to 9.45 L of water?
Answer:
1.95 M
Explanation:
Molarity is a measure of the molar concentration of a substance (solution). In relation to the volume, it is calculated using the formula as follows;
C1V1 = C2V2
Where;
C1 = initial concentration (M)
C2 = final concentration (M)
V1 = initial volume (L)
V2 = final volume (L)
According to the provided information in this question;
C1 = 14.38 M
C2 = ?
V1 = 1.28 L
V2 = 9.45 L
Using C1V1 = C2V2
14.38 × 1.28 = C2 × 9.45
18.4064 = 9.45 C2
C2 = 18.4064 ÷ 9.45
C2= 1.95 M
is sodium potassium nitrate exo or endo?
endothermic
Explanation:
I believe it's an endothermic but I'm not all too sure
Answer:
Pottasium nitrate is highly exothermic!However the dissolution of sodium nitrate in water is endothermic. Heat is absorbed during process.
In a closed chamber, 58 grams of propane gas and 220 grams of oxygen gas are sparked to initiate the combustion reaction shown below. C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(l) What is the limiting reagent in this reaction?
propane
oxygen
water
carbon dioxide
Answer:
C) Propane
Explanation:
It's literally all I know
Remember, the graph in question 1 is a cooling curve. A substance is
changing from a gas to a liquid to a solid. Which model illustrates the
final phase change in this cooling curve?
A) Image A
B) Image B
C) Image C
D) Image D
3. How much heat (in joules) is needed to raise the temperature of 355 g of ethanol I
(c = 2.4 J/gºC) by 63°C?
q=mcAT
Answer:
53676 J
Explanation:
m = 355 g
c = 2.4 J/gºC
ΔT = 63°C
q = mcΔT
= (355)(2.4)(63)
= 53676 J
The amount of heat is 53676J to raise the temperature of 355 g of ethanol.
What is temperature?Temperature is a measurement of the amount of energy of the atoms in a system or a physical quantity that expresses hot and cold.
What is heat?Heat is energy that is transmitted through one body to some other due to a temperature differential. When two bodies of different temperatures come together, energy can be transferred (heat flows) from the hotter to the colder.
It can be determined by the formula:
q =mCΔT.
where, q is heat, m is mass , C is and T is temperature.
Calculation of heat is shown below:
It is given that, mass of ethanol = 355 g, c = [tex]2.4 J/g^{0}[/tex] C, ΔT. = [tex]63^{0} C[/tex]
Now, put the values of given data in heat formula:
q =mCΔT
= 355×2.4×63
=53676J.
Therefore, the amount of heat will be 53676J to raise the temperature of 355 g of ethanol
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e) A plutonium atom splits apart to form two smaller atoms and free neutrons,
What type of reaction is this, where is it most likely to occur, and what else is
emitted during the reaction? (3 points)
Answer:
subject?
Explanation:
calculate the mass of 0.8 moles of Fe(NO3)3 (H2O)9
Answer:
Molar mass of (Fe(NO3)3)(H2O)9 is 403.9972 g/mole
Explanation:
the formula to find the mass of moles
Worked Example: molar mass = mass ÷ moles (M=m/n) Calculate the molar mass of a pure substance if 1.75 moles of the substance has a mass of 29.79 g.
i think it help you
How many moles of oxygen gas occupy 67.2 L of volume at STP?
A 0.333
B 3.00
C 1.00
Answer:
I would say b hope this helps
Explanation:
have a good day btw i had this question before:D
3. If a gas has a pressure of 32.1 psi at a temperature of 25°C, then what is the new pressure if the temperature is increased to 75°C?
Answer: 37.485 psi
Explanation: using the gas law and assuming that volume is constant due to nor being stated we use the formula
P1/T1=P2/T2
Note that the tempreture should be changed from °C to K by adding 273
Which best describes a chain reaction associated with a nuclear reaction A Neutrons released during a fusion reaction cause other to fuse B Neutrons released during a fission reaction cause other nucles to split C Helium nuclei released during a fission reaction cause other nuclei to split D Helium nuclei released during a fusion reaction cause other nuclei to fuse
Answer:
Neutrons released during a fission reaction cause other nuclei to split
Answer:
B: Neutrons released during a fission reaction cause other nuclei to split
Explanation:
How many grams of sodium chloride could be produced from 41.3 L of chlorine gas?
Answer:
The grams of sodium chloride that will be made is 292.5 g. calculation. 2Na + Cl₂ → 2NaCl. step 1: calculate the moles of Na. moles = mass/molar mass. From periodic table the molar mass of Na = 23 g/mol. moles = 115 g/23 g / mol = 5 moles. Step 2 : use the mole ratio to determine the moles of NaCl. Na:NaCl is 2:2 = 1:1 therefore the moles of NaCl is also = 5 moles.
Explanation:
We know sodium is a very active metal and chlorine is also a very reactive non-metal. Usually, metals like to eliminate electrons and non-metals such as halogens like to accept electrons. Sodium readily eliminate its last shell electrons become Na+ cation and chlorine accepts that electron to form Cl-anion.
How many moles are in 100 g of K3PO4 ?
Use the drop-down menus to rank the boiling points of the following hydrocarbons. Use a "1" to indicate
the compound with the lowest boiling point.
Answer:
1. 4
2. 2
3. 3
4. 1
Explanation: just did it on edge 2021
Answer:
one.) 4
two.) 2
three.) 3
four.) 1
Which equation is balanced?
CH4 + O2 ⟶ CO2 + H2O
Mg + 2HCl ⟶ MgCl2 + H2
Mg + P4 ⟶ Mg3P2
Answer:
A I think
Explanation:
im not sure so do with that what you will
In molecules, energy is stored in?
Atoms
Electrons
The Nucleus
Bonds
Answer:
Atoms
Explanation:
Energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy.