Answer:
The pressure when the stopcock is opened is opened is 87.783 cm
Explanation:
The given parameters of the question are;
The volume of the vessel of chlorine = 400 cc
The pressure of the vessel of chlorine = 80 cm
The volume of the vessel of chlorine = 250 cc
The pressure of the vessel of chlorine = 100 cm
Daltons law of Partial Pressures states that the total pressure exerted by a volume of a mixture of gases is equal to the partial pressures exerted by the individual gases in the mixture with respect to the given volume
Therefore;
The total volume of the mixture = 400 cc + 250 cc = 650 cc
The partial pressure exerted by the chlorine gas in the total volume is given by Boyles law as follows;
P₁·V₁ = P₂·V₂
P₂ = P₁·V₁/V₂
Where;
P₁ = 80 cm = The pressure in volume V₁ = 400 cc
P₂ₓ = The partial pressure of chlorine in volume V₂ = 650 cc
Substituting, we have;
P₂ₓ = 80 × 400/650 ≈ 49.321 cm
Similarly, the partial pressure exerted by the nitrogen gas in the total volume is given by Boyles Law as follows;
P₂ₐ = P₁·V₁/V₂
Where;
P₁ = 100 cm = The pressure in volume V₁ = 250 cc
P₂ₐ = The partial pressure of nitrogen in volume V₂ = 650 cc
Substituting, we have;
P₂ₐ = 100× 250/650 ≈ 38.462 cm
The pressure of the combined gas, P, when the stopcock is opened is opened is given by Dalstons Law of partial pressure as P = P₂ₐ + P₂ₓ
Therefore, the pressure, P when the stopcock is opened is opened = 49.321 cm + 38.462 cm = 87.783 cm
PLEASE HELP!!!!! I'LL YOU BRAINIEST!!!!
Answer:
I believe 11 is B 12 is C 13 is B and 14 is C
8. What is one sign that the water in your house is "hard?"
Answer:
More than soap sc um, hard-to-remove scale or film is often due to hard water. Also, take a good look at your faucets or fixtures.
Explanation:
hope this helps :D
Which of the following statements is true about cells?
A. All cells look the same.
B. All cells perform the same function.
O C. All cells perform specialized functions.
O D. All cells are prokaryotic.
Answer:
Explanation: i think it is C if i'am wrong i'am sorry
A chemist added hydrochloric acid to a sample of baking soda in a beaker. Immediately, the mixture of the two chemicals began to fizz and bubble. Which of the following observations about the fizzing mixture provides evidence of a chemical
reaction?
A. The temperature of the beaker did not change.
B. A substance escaped from the beaker in the form of a gas.
C. Some of the baking soda remained in the bottom of the beaker.
D. Most of the baking soda appeared to dissolve in the acid.
Answer: B
Explanation:
The observations about the fizzing mixture provide evidence of a chemical reaction is A substance escaped from the beaker in the form of a gas. The correct option is B.
What is a chemical reaction?A chemical reaction is a process of forming a compound from two substances. The substance that reacts to create a compound is called a reactant, and the compound that is formed after the reaction is called a product.
In a beaker, a chemist mixed hydrochloric acid with a sample of baking soda. The two chemicals together instantly started to bubble and fizz. Fizz is the bubbles that are made in the reaction, they are realized in the environment. Thus, they have escaped from the beaker.
Thus, the correct option is B. A substance escaped from the beaker in the form of a gas.
To learn more about a chemical reactions, refer to the link:
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can Someone help me with this
Answer:
1. Mg²⁺ 2. Cl⁻ 3. PO₄³⁻
Explanation:
Answer:
1. Mg²⁺
2. Cl⁻
3. PO₄³⁻
Explanation:
Feel free to give brainliest.
Have a great day!
PLEASE HELP!!! Which action will increase the gravitational force between two objects?
Use coefficients to increase the atoms on each side. Check to make sure you have the same number of each type of atom on each side. Count the atoms on each side. Identify the atoms on each side.
Answer:
Balancing an equation
Explanation:
These steps describes the processes which are involved in balancing a chemical equation.
In balancing the a chemical equation, the law of conservation of mass is strictly adhered to. It suggests that in a chemical reaction, atoms are neither created nor destroyed, but they combine with one another.
Therefore, the number atoms at start and end of a reaction must be the same. You can use coefficients to increase the atoms on each side. Also, check to makes sure the number of atoms on both sides are the same. Count the atoms on each side of the expression.Answer:
balancing
Explanation:
In an
The mass of a small stone was 27 g.
. The reading of the level of water in the graduated cylinder was 10 cm before the
stone was placed into the overflow can.
The reading of the level of water was 19 cm after the stone was placed into the
overflow can
(a) Calculate the volume of the stone.
(b) Calculate the density of the stone.
Answer:
d = 3 g/cm³
Explanation:
Given data:
Mass of stone = 27 g
Volume of water = 10 cm³
Volume of water+ stone = 19 cm³
Volume of stone = ?
Density of stone = ?
Solution:
Volume of stone = total volume - volume of water
Volume of stone = 19 cm³ - 10 cm³
Volume of stone = 9 cm³
Density of stone:
d = m/v
d = 27 g/ 9 cm³
d = 3 g/cm³
SOMEONE PLEASE ANSWER THIS IM TIMED ON MY TEST
When petrol is burned inside a car engine it reacts with oxygen from the air. the products are carbon dioxide and water. carbon dioxide is thought to contribute to climate change so some cars now do not use petrol as the fuel. they use hydrogen instead, when hydrogen is burned in oxygen no carbon dioxide is produced. just water.
write a word equation for both reactions;
use " - - >" for the arrow in your equations.
PLS ANSWER ILL MARK BRAINLIST PLEASE
it provides carbon dioxide and rhen it goes through the car and gives the gas oxygen
1.5 mol of the complex substance carbon dioxide (CO2) is just a few oxygen atoms:
Answer:
9.03 x 10²³atoms
Explanation:
Given parameters:
Number of moles of CO₂ = 1.5mol
Unknown:
Number of atoms = ?
Solution:
In a mole of a substance, we have the Avogadro's number of particles which is 6.02 x 10²³atoms.
Using this number, we can determine the amount of atoms in any substance.
If;
1 mole of CO₂ contains 6.02 x 10²³ atoms;
1.5mole of CO₂ will contain 1.5 x 6.02 x 10²³ atoms
= 9.03 x 10²³atoms
advantages of soapy detergents
Answer:
Soapy detergents clean more effectively than normal soap. Hard water (water with high mineral content). Hard water can be used with soapy detergents but soap cannot be used with hard water. When soapy detergent and hard water are combined it makes a protective film that is really resistant to rinsing.
Have a good day.
what is soul of nature?
Answer:
well I dont know much about it but....
I think the soul if nature is kind if like a goddess which provides us the reason to live and the reason to die.
I guess thats it :/
Answer:
The human soul is naturally and essentially immortal; it is uncreated and eternal. The soul passes from one body to another through a series of many incarnations. After paying off its sin (karmic debt), the soul is liberated from somatic existence and lives in a totally blissful state.
Explanation:
hope it helps you
What is the composition of ordinary glass
what is the frequency of green light that has wavelength of 5.5x10⁷m?
Answer:
5.5Hz
Explanation:
Given parameters:
Wavelength of green light = 5.5 x 10⁷m
Unknown:
Frequency of the wave = ?
Solution;
Green light is a part of the electromagnetic spectrum. The speed of all these rays in free space is 3 x 10⁸m/s
So;
V = fλ
V is the speed
f is the frequency
λ is the wavelength;
So;
F = [tex]\frac{V}{wavelength}[/tex]
Insert the parameters and solve;
F = [tex]\frac{3 x 10^{8} }{5.5 x 10^{7} }[/tex] = 5.5Hz
PLZ HELP GIVING BRAINLEST TO WHO EVER HELPS AND GETS THE RIGHT ANSWER. Plz and tysm
The pavement on a hot day has transformed light energy from______ to heat energy.
1. Radiation
2. Conduction
3. Convection
4.All of the above
Answer:
4. all the above
Explanation:
It's all of the above because Thermal energy has all three. An example is like a pot of water on the stove boiling. Radiation is coming off of the eye of the stove. Conduction occurs when heat transfers from hot to cold ( like the handle of the pot). Convection occurs in the boiling of the water by rotating causing the heat to rise.
Sarah used 2.5 cups of cheese in a dish that serves 10 people. Arun used 1.6 cups of cheese in a dish that serves 8 people. How much more cheese is in one serving of Sarah's dish? *
Answer:
0.05
Explanation:
We find the rate of the chess
Sarah is 2.5/10
Arun is 1.6/8
We will get
0.25 for Sarah
0.20 for Arun
We subtract the two
0.25 - 0.20, we then get 0.05
Sarah has 0.05 more cheese in one serving than Arun
Where is the majority of Helium in the United States obtained from?
How many oxygen atoms are in 15.0 grams of Magnesium phosphate?
Answer:
8 atoms of oxygen.
Explanation:
Given parameter:
Mass of magnesium phosphate = 15g
Unknown:
Number of oxygen atoms = ?
Solution:
The formula of the compound is;
Mg₃(PO₄)₂;
Number of atoms oxygen = 2(4) = 8 atoms of oxygen.
what is the name for Sn(NO3)4
Answer:
Tin (IV) Nitrate
General Formulas and Concepts:
Chem
Reading a Periodic TableIdentifying Polyatomic IonsWriting chemical compoundsDetermining chargesExplanation:
Sn has 2 general forms in charges: Sn²⁺ and Sn⁴⁺ as it is a Post-Transition metal.
Nitrate, NO₃⁻, has a 1 minus charge.
To balance out these charges from the given compound, we know that there are going to be 4 nitrates to balance out a charge. +4 and -4 equals 0, so the charge of Sn would be +4.
Therefore, our compound name would be Metal (Oxidation Number) polyatomic ion:
Tin (IV) Nitrate
WHO EVER ANSWERS THESE TWO QUESTIONS AS SIMPLE AS THEY CAN GETS 100 POINTS AND BRAINLY. DONT GO ON GOOGLE I ALREADY CHECKED JUST ANSWER IN YOUR OWN WORDS.
How is the atomic mass calculated for elements on the periodic table
How are orbit and electron cloud models of the atom different.
Answer:
The electron cloud keeps the surronds the atom like abubble and the orbit is what the electrons go around
Explanation:
What occurred during Rutherford’s experiment that led to his discovery of the nucleus?
Answer:
Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup." Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
Explanation:
a/n_________shows the number of valence electrons in an
(n)
tom in pictorial fashion.
A electron dot diagram
B periodic table C Graph
Answer:
Periodic table
Explanation:
Imagine that a cold snap hits Florida in February. Would it be cooler along the coast or further inland? Plz plz plz anwswr quick
Along the coast, its always colder near water
Aqueous solutions of lithium bromide and silver nitrate are mixed.
Precipitate:
Chemical Equation:
Complete Ionic Equation:
Net ionic Equation:
Answer:
Chemical equation: AgNo3 + LiBr = AgBr + LiNO3
Explanation:
Answer:
Chemical equation: AgNO3 + LiBr -> AgBr + LiNO3
Complete Ionic equation: Ag + NO3 + Li + Br -> AgBr + Li + NO3
Net Ionic equation: Ag + Br -> AgBr
Explanation:
You start out with the chemical equation. We know that to get to the complete ionic equation we have to follow the solubility guidelines for common ionic compounds. In there, we can see that NO3 is soluble with no exceptions, which means every NO3 in this equation should be separated from the compound (this brings us to Ag + NO3 + LiBr -> AgBr + Li + NO3). Next we should separate Br, but be careufl because in the solubility guidelines it states that an exception to this being soluble would be if Br was next to Ag, Hg, and Pb. Since our second Br is next to an Ag, our equation will look like Ag + NO3 + Li + Br -> AgBr + Li + NO3. To find the net ionic equation all we're going to need to find are the substances that cancel each other out on both sides of the equation (aka the spectator ions). Our spectator ions in this case are Li and NO3. After we cancel those out, our net ionic equation is Ag + Br -> AgBr.
The following equation is balanced according to the Law of Conservation of Mass:
2 NO + O2 → 2 NO2
True
False
A neighbor wants to use his backyard garden to
conduct an investigation of how tomato plants use specific amounts of
carbon dioxide and water to grow at a certain rate. Is this a good idea?
Explain.
Answer:
No, it is not
Explanation:
The reason for this answer is below
To conduct an experiment/investigation that involves the use of specific amounts of carbon dioxide and water by plants, one needs a controlled environment where the amount of carbon dioxide and water made available to the plant can be monitored and regulated as desired by the experimental design. The neighbor's backyard cannot provide this controlled environment and thus it is a bad idea.
Note that the neighbor's backyard cannot provide the controlled environment because the amount of carbon dioxide the plants will be exposed to there cannot be regulated as this is the carbon dioxide from the atmosphere and also the plants could get additional water from midnight dew which cannot be regulated also.
It is a good idea to use backyard garden to conduct an investigation of
how tomato plants use specific amounts of carbon dioxide and water to
grow at a certain rate.
To obtain an accurate result, experiments should be done in an
environment which is similar to those in which plants are exposed to during
photosynthetic reactions.
The use of the backyard garden will have different factors such as
atmospheric pressure, sunlight, precipitation which the plants are exposed to
in its normal environment which is why it is a good idea.
Read more on https://brainly.com/question/897750
How do sediments become
sedimentary rock?
Answer:
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.
In this experiment, what is the independent variable?
A.) The number of worms
B.) The type of worms
Answer:
i think it would be B.
Explanation:
For a material to float on the surface of water, the material must have a density
less than that of water (1.0 g/ml) and must not react with the water or dissolve in
it. A spherical ball has a radius of 0.50 cm and weighs 2.0 g. Will this ball float or
sink when placed in water? (Note: Volume of a sphere = 4/3(pi)(r^3)
Answer:
Explanation:
volume of spherical ball = 4/3 x π R³
= 4 x 3.14 x .5³ / 3
= .5233 cm³ or ml.
mass = 2 g
density = mass / volume
= 2 / .5233
= 3.8 g / ml .
So its density is more than that of water , hence it will sink into water .
When baking, the rods in an oven heat up and turn red. This is an example of
A. an object emitting radiation as its temperature is above 0°C.
B. an object emitting conduction as its temperature is above 0°C.
C. an object emitting radiation as its thermal boundary layer is above 0°C.
D. an object emitting conduction as its thermal boundary layer is above 0°C.
a
b
A
B
с
D
d
Answer:
The most correct option is A
Explanation:
The correct option is A because all objects emit thermal radiation when there temperature is higher than absolute zero - this is based on the Stefan-Boltzmann law. Hence, when the rods in an oven heat up above absolute zero, they begin to start emitting radiation. It should noted at this point that objects do not "emit" conduction and thus all options that involved "emitting conduction" are subsequently wrong.