Answer:
382.5 grams
Explanation:
Find the molar mass of NaNO₃ and then multiply the number of moles by that molar mass :)
Calculate the volume of chlorine at stp that would be required to act completely with 3.70g of dry slaked line
Answer:
The volume required is 2.24L
Explanation:
The slaked lime Ca(OH)2, reacts with chlorine, Cl2, as follows:
6Cl₂(g) + 3Ca(OH)₂(s) → Ca(ClO₃)₂ (aq) + 2CaCl₂ (aq) + 6HCl (aq)
Where 6 moles of chlorine react with 3 moles of slaked llime,
To solve this question we must find the moles of slaked lime added. With these moles we can find the moles of chlorine required and its volume at STP as follows:
Moles Ca(OH)2 - Molar mass: 74.093g/mol-
3.70g * (1mol / 74.093g) = 0.0500 moles Ca(OH)2
Moles Cl₂:
0.0500 moles Ca(OH)2 * (6 mol Cl₂ / 3 mol Ca(OH)2) =
0.100 moles Cl₂
Now using PV = nRT
nRT / P = V
Where n are moles: 0.100 moles
R is gas constant = 0.082atmL/molK
T is absolute temperature = 273K at STP
P is pressure = 1atm at STP
And V is volume, our incognite:
0.100mol*0.082atmL/molK*273K / 1atm = V
2.24L = Volume of Cl₂
The volume required is 2.24L*Riddle!* *Riddle!!* *Riddle!!!*
Answer these *science riddles*
1. What kind of chemical element hates to be a follower?
2. I come as a gas and I get in line with neon. I am also known as the home of a very super person. What am I?
3. What two periodic elements, when combined, heal?
4. What is black when you buy it, red when you use it, and gray when you throw it away?
5. I'm a god and also a planet and the same time I am a measure of heat. Who am I?
6. What goes up and down stairs without moving?
7. Give it food and it will live; give it water and it will die.
8. What can you catch but not throw?
9. I run, yet I have no legs. What am I?
10. Take one out and scratch my head, I am now black but once was red.
11. Remove the outside, cook the inside, eat the outside, throw away the inside.
12. What goes around the world and stays in a corner?
13. What gets wetter the more it dries?
14. The more there is, the less you see.
15. They come at night without being called and are lost in the day without being stolen.
Answer:
https://www.getriddles.com/science-riddles/
Explanation:
go to this link, you will find some answers
hope it helps!
name 2 things that cholesterol is used for
Predict the nature of the indicated covalent
bond.
polar or non-polar
The nature of the indicated covalent bond in water molecule is polar.
What is a covalent bond?A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
Examples of compounds that exhibit covalent bondOxygenChlorine gasWater (H₂O), etcPolarity of waterThe atoms that make up the molecule of water causes the water molecule to be polar because of its shape.
Thus, the nature of the indicated covalent bond in water molecule is polar.
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Someone help please?- Ill give brainilist.
Answers:
1. Carbon is to organic as silicon is to inorganic
2. Sugar is to carbohydrate as oil is to lipid
what is a substance?
Calculate magnetic moment of a divalent ion in aqueous solution, if the electronic configuration is [Ar] 3d5 .
Answer:
5.47 B.M
Explanation:
✓We were given electronic configuration of argon as [Ar] 3d5.
✓This is a divalent ion. It has atomic number of 25.
✓magnetic moment can be calculated using below expresion
√[n(n+2)] .....................eqn(1)
✓ It has 5 unpaired electrons. Then n= 5
✓ [n(n+2)]
✓ substitute the ( n= 5) into eqn(1)
Then magnetic moment= [n(n+2)]
= [ 5(5+2) ]
= 5.47BM
explain how of hope's apparatus can be used to demonstrate anomalous behaviour and water class 10
Answer:
The anomalous expansion of water refers to the fact that water, unlike most substances, expands when it freezes. The density of water increases as temperature decreases, but reaches a maximum at 4 degrees C then begins to expand. The significance of this is that ice is less dense than water so it floats in water.
This is of major biological importance. Lakes, ponds and streams freeze from the top down instead of from the bottom.
Which of these oceans remain frozen accept for part of the year, when the edges melt?
Pacific
Southern
Atlantic
Indian
Artic
Answer:
artic is correct please give brainliest please??
Calculate the mass in grams of 550 mol of aluminum
Help please!
Answer:
Explanation:
1 mol of Aluminum = 26.98 grams
550 mol of Aluminum = x
1 * x = 550 * 26.98
x = 14839 grams
What do you know about plants cell and animal cells?
restate the answer and answer it
Explanation:
Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane. This gives the plant cell its unique rectangular shape. Animal cells simply have a cell membrane, but no cell wall.
Only awnser #5#6#7#8 please 20 points! And i will mark brainliest.
Answer:
5. radiative zone 6. 27 million degrees Farenheit 7. photosphere 8. approximately 25 million degrees Farenheit if using the calculation for the core temperature of the sun at 27 million degrees as the corona is 2 million degrees
Explanation:
which technology would be the most useful in predicting an eruption from an undersea volcano and why
Answer: Infrasound because sound waves travel easily through water to accessible buoys.
Explanation: its installation: underwater microphones hung from buoys near a volcano. how it works: senses low-frequency sound waves near a volcano. Since in its installation it specifies that it has UNDERWATER microphones and the question asks in predicting an eruption from an UNDERSEA volcano, that makes perfect sense.
Volcanologists utilize a technique called infrasound monitoring to pick up low-frequency pitches that are inaudible to human hearing and to pick up rumblings and explosions inside volcanoes. A crater can be altered by volcanic activity, which alters the shape of the infrasonic sound waves that are emitted by the volcano.
What is volcano ?An opening in the crust of a planet or moon known as a volcano allows molten rock, heated gases, and other things to erupt. As layers of rock and ash accumulate from numerous eruptions, volcanoes frequently take the form of a hill or mountain. There are three types of volcanoes: active, dormant, and extinct.
Seismographic detection of the earthquakes and tremor that almost invariably precede eruptions, as well as exact measurements of the ground deformation that frequently coincides with the ascent of magma, are just a few of the many methods that scientists employ to monitor volcanoes.
Tiny movements along a volcano can be a sign of an impending eruption because of rock fractures along the magma chamber. Scientists can enter this data and utilize GPS and satellites to measure this deformation.
Thus, A crater can be altered by volcanic activity, which alters the shape of the infrasonic sound waves that are emitted by the volcano.
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What event occurs when the
tension built up along Earth's
plates is released causing one
plate to slip past another?
Answer:
An earthquake
Explanation:
Given the reaction: 3() + () → 3() + 2()
. Which of
the following statement is TRUE?
a. 1 mole of 3()
is needed to react with 1 mole NaOH to produce a
product.
b. 1 mole of 3()
is needed to react with 1 mole of water to produce a
product.
c. 1 mole of 3()
is needed to react with 1 mole of NaOH to produce the
product.
d. All of the above
Answer:
i think d is the answer for this
Infer why it is important to add sodium chloride to
water when making homemade ice cream.
Answer:
the addition of sodium chloride to water effect a lowering of the melting point of water such that the liquid cream or water mixture tends to solidify upon churning when in thermal contact with the mix indigrents
In H20 does the 2 apply to
Hydrogen, Oxygen, or Both?
Answer:
The difference is due to the fact that one water molecule has two hydrogen atoms to one oxygen atom, as explained above. This means it takes two water molecules (2 H2O) to make one oxygen molecule (O2)
Explanation:
Answer:
In H20 does the 2 apply to Hydrogen
Explanation:
In H₂O there is two atoms of hydrogen and 1 atom of Oxygen
Hence, In H20 does the 2 apply to Hydrogen
-TheUnknownScientist
8. Of what importance is a smoker to a person keeping bees?
Answer:
they help to calm the bees when the person keeping the bees inspects there hives.
What is the velocity of a wave with a frequency of 10 Hz and a wavelength of
2 m?
A. 0.2 m/s
B. 20 m/s
C. 5 m/s
D. 8 m/s
SUBMIT
Answer:
B. 20m/s
Explanation:
The wavelength of a wave can be calculated using the formula;
λ = v/f
Where;
λ = wavelength (m)
v = velocity (m/s)
f = frequency (Hz)
According to the information provided in this question; the wave has a wavelength (λ) of 2m and a frequency (f) of 10Hz.
Using λ = v/f
v = λ × f
v = 2 × 10
v = 20m/s.
A 130.0-mLmL sample of a solution that is 3.0×10−33.0×10−3 MM in AgNO3AgNO3 is mixed with a 225.0-mLmL sample of a solution that is 0.14 MM in NaCNNaCN. For Ag(CN)2−,Ag(CN)2−, Kf=1.0×1021Kf=1.0×1021. After the solution reaches equilibrium, what concentration of Ag+(aq)Ag+(aq) remains?
Answer:
1.2x10⁻²³M = [Ag⁺]
Explanation:
The Kf of Ag(CN)₂⁻ is:
Ag⁺(aq) + 2CN⁻ → Ag(CN)₂⁻(aq)
Kf = 1.0x10²¹ = [Ag(CN)₂⁻] / [Ag⁺] [CN⁻]²
Where [] are equilibrium concentrations.
The initial concentrations of the reactants are:
[Ag⁺] = 3.0x10⁻³M * (130mL / 355mL) = 1.10x10⁻³M
335mL is the total volume of the solution
[CN⁻] = 0.14M * (225mL / 355mL) = 0.089M
In equilibrium, the concentrations are:
[Ag⁺] = 1.10x10⁻³M - X
[CN⁻] = 0.089M - 2X
Ag(CN)₂ = X
Replacing in Kf expression:
1.0x10²¹ = [Ag(CN)₂⁻] / [Ag⁺] [CN⁻]²
1.0x10²¹ = [X] / [1.10x10⁻³ - X] [0.089 - 2X ]²
1.0x10²¹ = [X] / 8.7131×10⁻⁶ - 0.0083126 X + 0.3604 X² - 4 X³
8.7131×10¹⁵ - 8.3126×10¹⁸ X + 3.604×10^20 X² - 4x10²¹ X³ = X
8.7131×10¹⁵ - 8.3126×10¹⁸ X + 3.604×10^20 X² - 4x10²¹ X³ = 0
X = 0.0011M → Right solution.
X = 0.0445M → False solution. Produce negative concentrations
Replacing:
[Ag⁺] = 0
[CN⁻] = 0.0868M
Ag(CN)₂ = 0.0011M
The equilibrium will shift to the left just a little bit until produce a determined amount of Ag⁺ that we can write as:
[Ag⁺] = X
Thus:
1.0x10²¹ = [0.0011] / [X] [0.0868M ]²
1.2x10⁻²³M = [Ag⁺]what is it called when a plant produces an abundant life
Answer:
reproduction i would believe
Explanation:
if correct plz mark brainliest
Answer:
Reproduction :)
Explanation:
hope this helps
Describe the two methods to increase the rate at which a substance dissolves.
what’s the answer to number 6 ty!!
Answer:
0.00032 M
Explanation:
From the question,
Applying the for pH
pH = -log[H⁺]............... Equation 1
Where H⁺ = Hydrogen ion concentration of Hydrochloric acid
Given: pH = 3.50
Substitute into equation 1 and solve for H⁺
3.50 = -log[H⁺]
Taking the log inverse of both side,
H⁺ = 10⁻⁽³⁵/¹⁰⁾
H⁺ = 0.00032 M
Hence the H⁺ of Hydrochloric acid is 0.00032 M
Scenario: You are testing two different household solutions with your cabbage indicator, using the color key to the right.
One solution turns blue. A possible hydrogen ion concentration for this solution is: D
1 × 10-2 M
5 × 10-2 M
5 × 10-4 M
1 × 10-8 M
Answer:
DDDDD
Explanation:
According to the indicator theory, the hydrogen ion concentration for this solution is 1 × 10⁻⁸ M.
What is an indicator?Indicator is defined as a chemical substance which is chemically a weak acid or a weak base which changes it's color depending upon the concentration of hydrogen ions present in the solution.They dissociate slightly in water to produce ions.
These are generally derived from plant pigments and are of slightly acidic or basic in nature.There are three types of indicators:
1) natural indicators
2) synthetic indicators
3) olfactory indicators.
These are mainly used in determination of end point of titrations. Every indicator has it's pH range in which it can perform effectively.These are usually organic compounds.
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Explain how subscripts are used when counting atoms in a compound
Answer:
The number of atoms of each kind is indicated by a subscript following the atom. If there is only one atom, no number is written. If there is more than one atom of a specific kind, the number is written as a subscript following the atom.
Plllllzzzzzzzz helppppppppppp science helpppp 20 points plzzz help.
Sierra has a special kind of liquid rubber. She knows that ultraviolet light is absorbed by the rubber, X-ray light is transmitted through the rubber, and blue light is reflected off the rubber. Sierra wonders if the liquid rubber will become solid if she shines the lights on it. Can light cause the rubber to become solid? Why or why not? Does it matter what type of light she shines on the rubber?
Answer:
yes it can because heat can solidify the rubber and it does matter what light
Explanation:
The light can cause the rubber to become solid. It doesn't matter the type of light.
Any type of light can cause the rubber to become solid because all types of
light emit thermal(heat) radiation. When they are emitted , it causes the
vaporization of some compounds thereby causing it to solidify.
In this scenario, the rubber being able to absorb ultraviolet light simply
depicts that it will solidify as a result of an increase in temperature due to
the thermal radiation.
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PLEASE HELP ME OUT. I AM REALLY LOST AND I JUST NEED THIS LAST QUESTION I WILL BE GRATEFUL AND WILL GIVE BRANLIEST!
PLEASE HELP ME OUT. I AM REALLY LOST AND I JUST NEED THIS LAST QUESTION I WILL BE GRATEFUL AND WILL GIVE BRANLIEST!
PLEASE HELP ME OUT. I AM REALLY LOST AND I JUST NEED THIS LAST QUESTION I WILL BE GRATEFUL AND WILL GIVE BRANLIEST!
Explanation:
—COOH and —NH₂
Carboxylic Acid and Amino
The circulatory system works with other systems to (select all that apply)
Answer:
where are the answer choices
answer truthfully:))
Answer:
b) velocity.
c) velocity, m/s²
d)change in velocity, change in direction, change in both velocity and direction.
e) increasing or decreasing
How many molecules are there in 2.00 moles of ammonia (NH,)?
Answer:
Explanation:
molecules NH3 = 1.47 moles x 6.02x1023 molecules/mole = 8.9x1023 molecules of NH3
