Answer:
608 L
Explanation:
Using Boyle's law equation as follows:
P1V1 = P2V2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (L)
V2 = final volume (L)
According to the information provided in this question;
P1 = 1.00atm
P2 = 2.8atm
V1 = ?
V2 = 217L
Using P1V1 = P2V2
V1 = P2V2/P1
V1 = 2.8 × 217/1
V1 = 607.6/1
V1 = 607.6
The initial volume is 608 L
How many mL of 0.40 M barium chloride are needed to react 175 mL of 1.50 M ammonium phosphate in the precipitation of barium phosphate?
Answer:
656.25 mL
Explanation:
M1 = 0.40 M
M2 = 1.50 M
V2 = 175 mL
Plug those values into the equation:
M1V1 = M2V2
(0.40)V1 = (1.50)(175)
---> V1 = 656.25 mL
Using your own words, explain energy.
____________ is refining the extracted raw metals into a purest form
Answer:
Extractive metallurgy
Explanation:
Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form.
a. silicon
b. carbon
c. beryllium
d.chromium
Answer:
It's a. silicon
Explanation:
Ammonia (NH3) clouds are present around some planets. Calculate the number of grams of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen
N2 + 3 H2 -> 2 NH3
30.6 g of ammonia are produced.
Answer:
given
mass of hydrogen =5.4 gram
mass of NH3=?
we have
3 moles of H2=2 moles of NH3
3×2g of H2=2×(14+3) g of NH3
6 g of H2=34 g of NH3
5.4 g of H2=34×5.4/6=30.6 g of NH3
30.6 g of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen.
What is Mole?The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
Given,
Mass of Hydrogen = 5.4 g
Moles of hydrogen = mass ÷ molar mass
= 5.4 ÷ 2 = 2.7 moles
From the reaction, 3 moles of hydrogen produce 2 moles of ammonia
So, 1 mole of hydrogen will produce 2 ÷ 3 moles of ammonia
Thus, 2.7 moles will give ( 2÷3) × 2.7
= 1.8 moles of ammonia
Mass of ammonia = 1.8 × 17
= 30.6 g
Therefore, 30.6 g of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen.
Learn more about Moles, here:
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How will the price of a product impact on the profits of the entrepreneur
Answer:
The higher your price, the less volume you have to produce for a given dollar amount of profit! Even a small price increase can generate significant additional profit. ... When a business comes out with a new product or service and they are the first to market, they may be able to charge high prices initially.
Explanation:
what is the mass of 1.24 x 10^23 molecules of N2O2
12.4 g N₂O₂
General Formulas and Concepts:Chemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.24 × 10²³ molecules N₂O₂
[Solve] grams N₂O₂
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of N - 14.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of N₂O₂ - 2(14.01) + 2(16.00) = 60.02 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.24 \cdot 10^{23} \ molecules \ N_2O_2(\frac{1 \ mol \ N_2O_2}{6.022 \cdot 10^{23} \ molecules \ N_2O_2})(\frac{60.02 \ g \ N_2O_2}{1 \ mol \ N_2O_2})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 12.3588 \ g \ N_2O_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
12.3588 g N₂O₂ ≈ 12.4 g N₂O₂
How do heavy metals like cobalt, zinc, mercury, and lead get into the environment, and why are they harmful?
Answer:
How they get into the environment
How is the periodic table used to determine properties of elements
Answer:
I don't know
Explanation:
hindi ko alam
N2(g) + 2 O2(g) → 2 NO2(g)
Answer
Answer:
180.6
Explanation:
N2 (g) + 2O2 (g) → 2NO2 (g) ΔH = 66.4 kJ
2NO (g) + O2 (g) → 2NO2 (g) ΔH = -114.2 kJ
Hope this helped, and please mark as Brainliest :)
Why do you think it is a bad idea to use taste, touch, or smell to identify an
unknown chemical?
Answer:
Because it can cause health problems or injuries to our sense organs.
Explanation:
Chemicals in the laboratory are made up of different constituents, which may be dangerous or injurious to health. This is the reason why safety measures or precautions have to be taken when working in the laboratory. One of those safety measures is that "one should never use taste, touch, or smell to identify an unknown chemical".
This is so because a chemical that is unknown amounts to the fact that what such chemical contains is unknown, hence, the chemical might have the ability to cause harm or injuries to the sense organ. For example, a conc. acid that is tasted will burn the tongue etc.
please answer thx will mark brainliest if correct
Answer:
C
Explanation:
Gases have lowest forces of attraction.
CH4O+ O2 → CO2 + H2O
Balance the following chemical equation
Answer:
2 CH4O + 3 O2 = 2 CO2 + 4 H2O
plz help me
1. You have a solution that has a pOH of 2.13. What is the pH of this solution?
A. 16.13
B. 11.87
C. 6.57
D. 3.29
2. If the pH of a solution is 5.26, what is it’s pOH?
A. 19.26
B. 8.74
C. 4.88
D. 2.66
Answer:
pH=14-pOH
1. B
pOH= 14- pH
2.B
Explanation:
Answer:
1. B
pH=14-pOH
2.B
pOH= 14- pH
Explanation:
What is simple chemical test could you carry out to see if carbon dioxide has been produced
Carbon Dioxide
A positive test will result in the lime water turning milky. Lime water turns milky as the Calcium hydroxide (chemical name for limewater) reacts with carbon dioxide to form Calcium Carbonate which is insoluble in water and thus forms a milky white precipitate.
Using the periodic table in Figure 7-1, all of the following elements belong to the main group elements EXCEPT:
a. hydrogen
b. radium
c. aluminum
d. iron
Answer:
c. aluminium ic correct
PLEASE HELP!!!
i’m tried and i wanna go to sleep♀️
HELP ASAP!!!
WAVES ALWAYS ORIGINATE WITH SOME
a
person
b
object
C
disturbance
Answer:
Disturbance
Explanation:
I believe it is Disturbance because waves are normally caused by wind, and wind classifies as Disturbance.
use kinetic molecular theory to explain why a gas takes the shape and volume of its container
Answer:
Imo : Gas particles are in constant, random motion. The volume of gas particles is negligible in comparison to the volume of the container. There are no attractive forces between gas particles.
The distance between the gas molecules are far apart and they assume the volume and shape of their container.
What is kinetic theory of gasesThe kinetic theory of gases states that gas molecules are in state of constant motion colliding with one another and with walls of the container.
Shape and volume of gasesBased on this theory, at an ideal condition the volume of the gas molecules are negligible and hence they take the shape of the containing vessel.
Thus, the distance between the gas molecules are far apart and they assume the volume and shape of their container.
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What does chlorination do?
Answer: Chlorination is the process of adding chlorine to drinking water to kill parasites, bacteria, and viruses. Different processes can be used to achieve safe levels of chlorine in drinking water.
Which statement describes proper conduct in the laboratory?
Select one:
O a. Eating snacks in the laboratory is allowed.
O b. In order to identify things they should be tasted.
O c. Colorless fumes should be identified by direct smelling.
O d. Be aware of the location of safety and first aid equipment.
Answer:
D.
Explanation:
I mean. It's logic for sure
Answer:
Its D and pls mark brainliest
Explanation:
CH3OH can be synthesized by the reaction:
CO(g) + 2 H20) — CH3OH)
What volume of CH3OH gas (in L) can be synthesized if 18.6 L of Hy gas completely reacts at STP conditions?
Answer:
5
Explanation:
PLEASEEEE HELPPP??????
Answer:
(B) Grasses to Grasshoppers to Birds to Foxes
Explanation
Compute the brightness difference appearing in an aperture of 2 inches and one of 100 inches (Plz Help, i need to get this done today)
Answer:
The 2 inches would be brighter than the one of 100 inches
2. What evidence is there that mass extinction events occurred?
Answer: Although the best-known cause of a mass extinction is the asteroid impact that killed off the non-avian dinosaurs, in fact, volcanic activity seems to have wreaked much more havoc on Earth's biota. Volcanic activity is implicated in at least four mass extinctions, while an asteroid is a suspect in just one. Examples, of mass extinctions are Permian extinction of marine species, and Cretaceous extinction of various species, including dinosaurs.
HURRY ILL GIVE BRAINLIEST!
Match the cause to its effect.
Answer:
Cattles are giving nutrition supply throughout the year----some animals require nutrient enhancement for health
calves are given colostrum at birth----newborns require antibodies from their mothers
I dont want to write, so you know what the last option is
Explanation:
:) hope this helps
The diagram below shows four coastline locations on Earth with respect to the moon at a given time. Moon A B D C In this current position, which coastline(s) are experiencing a daily high tide? Only A O Only B O Both A and C Both B and D
Answer: Only A
Explanation: The moon controls the tides because of its gravitational pull. The moon's gravitational pull is weaker than Earths that is why the moon's gravitational pull only effectts water on the earth.
Una solución hallar punto de vista física y punto de vista químico (sal) 50g de sal y 250 ml de agua hallar %m/m %m/v molalidad, molaridad, fracción molar del soluto y del solvente
Answer:
% m/m = 16.6%
% m/v = 20%
3.42 m (molalidad)
3.42 M (molaridad)
Fraccion molar del soluto = 0.06
Fraccion molar del solvente = 0.94
Explanation:
Nuestra solución está compuesta por:
Soluto: 50 g de sal
Solvente: 250 mL de agua.
%m/m %m/v molalidad, molaridad, fracción molar del soluto y del solvente son distintas formas de definir la concentración:
% m/m son los gramos de soluto cada 100 g de solución.
No sabemos la masa de solución pero con la densidad del agua (solvente), sabemos que los 250 mL contienen 250 gramos de solvente. (Densidad del agua 1g/mL). En conclusión, la masa de solución es 50 g + 250g = 300
% m/m = (50g /300g ) . 100 = 16.6%
Vamos a definir que el volumen de la solución es igual al del solvente: 250 mL.
% m/v = la masa de soluto, cada 100 mL de solución
= (50 /250) . 100 = 20 %
Molalidad, son los moles de soluto por cada kg de solvente.
Convertimos gramos a kg → 250 g . 1kg /1000g = 0.25kg
Convertimos la masa de soluto (sal) a moles.
NaCl → 50 g . 1mol/ 58.45g = 0.855 moles
m = 0.855 /0.25 → 3.42 m (molalidad)
Molaridad son los moles de soluto por cada L de solución.
Convertimos mL a L → 250 mL . 1kg / 1000mL = 0.25 L
sabiendo que los moles de soluto son 0.855, en este caso la molaridad es igual a la molalidad ( 3.42 M)
Para calcular la fracción molar, necesitamos moles de soluto y de solvente.
Ya contamos con los moles de soluto.
Moles de solvente: 250 g . 1mol /18g = 13.89 mol
Moles totales = 0.855 + 13.89 = 14.745
Fracion molar del soluto: (0.855/ 14.745) = 0.06
Fraccion molar del solvente: (13.89 / 14.745) = 0.94
Our Solar System consists of our star, the Sun, and its orbiting planets (including Earth), along with numerous moons, asteroids, comet
material, rocks, and dust. However, our Solar System is only part of space. Place the following in order from biggest to smallest.
A) Galaxy, Universe, Solar System, Star, Planet
B) Universe, Solar System, Galaxy, Planet, Star
C) Solar System, Universe, Galaxy, Star, Planet
D) Universe, Galaxy, Solar System, Star, Planet
Answer:
D
Explanation:
Universe consits of galaxies, galaxies consit of solar systems, and solar systems consist of planets
1. You have 3.5L of a gas at 6 atm of pressure. The pressure drops to 2.4 atm, what is the new volume of
the gas?
I
Answer:
8.75 LExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we're finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
We have
[tex]V_2 = \frac{3.5 \times 6}{2.4} = \frac{21}{2.4} \\ = 8.75[/tex]
We have the final answer as
8.75 LHope this helps you