Answer:
decreases by 10 gram
Explanation:
identify two conjugate base for each compound HCN and HBr
The conjugate base of HCN is CN^-
The conjugate base of HBr is Br^-
If 50 mL of pure acetone is mixed with 450 mL of water, what is the percent by volume of acetone?
Answer:
10%
Explanation:
The percent by volume of acetone is given by the following formula:
% v/v = Volume of acetone / Total Volume * 100%
Now we calculate the total volume of the solution:
Total Volume = Volume of Acetone + Volume of Water
Total Volume = 50 mL + 450 mL = 500 mL
Then we calculate the percent by volume:
% v/v = 50 mL / 500 mL * 100 % = 10%
from E=mc²=hv show that wavelength=h/mv
Explanation:
To show - from E=mc²=hv show that wavelength=h/mv
Proof -
Given that,
E = mc²
E = hν
By equating both the equations, we get
mc² = hν
Because real particles do not travel at the speed of light, De Broglie submitted velocity ( v ) for the speed of light ( c ).
mv² = hν
Through the equation λ , de Broglie substituted v/λ for ν and arrived at the final expression that relates wavelength and particle with speed.
mv² = hv/λ
⇒λ = hv/mv²
⇒λ = h/mv
Hence showed.
What is a metal oxide + acid
Metal oxide + acid —> __+__
Answer:
Metal oxide + acid —> salt + water
Explanation:
How much is 1 mole of something?
Answer: D.
Explanation:
6.02 * 10^-23
Calculate the molar mass of Ca3(PO4)2
934.32 g Ca3(PO4)2 =______
moles Ca3(PO4)2
Answer:
Molar mass of Ca₃(PO₄)₂ = 310.18 g/mol934.32 g Ca₃(PO₄)₂ = 3.01 moles Ca₃(PO₄)₂Explanation:
The molar mass (MM) of Ca₃(PO₄)₂ can be calculated as follows:
MM of Ca₃(PO₄)₂ = (MM of Ca)*3 + [(MM of P) +(MM of O)*4]*2MM of Ca₃(PO₄)₂ = 310.18 g/molNow we can convert 934.32 g of Ca₃(PO₄)₂ into moles:
934.32 g ÷ 310.18 g/mol = 3.01 molesConsider the role of third world countries in this system. How would they benefit or not benefit from a cap and trade system?
Answer:
they would benefit
Explanation:
they would benefit because we can move more machines that reduce pollution in those countries.
ch3cooh number of bonding pairs and lone pairs.
Answer:
whats the question?
Explanation:
what are factors that affecting the boiling point of liquid?
Air movement and weather conditions are influenced by
A The Moon
B. Altitude
C. Thermal Energy
Answer:
The moon
Explanation:
The answer is A; Sorry i put the wrong answer by accident. I was trying to get to another question.
Give the answer below brainliest!!!
A. The moon influences the air movement
For the reaction 2Na + Cl2 2NaCl, calculate the percent yield if
155.0 g of chlorine (Cl2) should be produced and your experiment
produced 143 g (C12).
Answer:
[tex]Y=92.25\%[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction, it is possible for us to calculate the percent yield by dividing the actual yield of 143 grams of gaseous chlorine by the theoretical yield of 155 g of this gas. In such a way, we proceed as follows:
[tex]Y=\frac{143g}{155g} *100\%[/tex]
Which has a result of:
[tex]Y=92.25\%[/tex]
Regards!
Select ALL of the abiotic factors
lesson 5.01
Question 1 options:
air
light
fungi
soil
salinity
Answer:
I think it should be
salinity and
light
What happens in radioactive decay?
O A. An electron is lost to form a negatively charged particle.
O B. An unstable nucleus breaks down into smaller parts.
O C. Two smaller nuclei are joined to form one larger nucleus.
O D. A large nucleus breaks apart to form smaller nuclei.
SHIRME
A radioactive atom will spontaneously release radiation in the shape of energy rather than particles in order to transition into a more steady state.
Why is something radioactive?Radioactivity, as its name suggests, seems to be the act of generating radiation without any external cause. This is carried out by an unstable atomic nucleus that "wants" to abandon certain power in order to change to a more stable form.
Are people radioactive at all?Absolutely, since humans consume radioactive materials from the environment through food, drink, and air, our bodies are inherently radioactive. Our bodies take these substances in and store them in our bones, tissues, and organs. We also breathe them in and consume them.
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How many moles are in 150g of Li2O?
Answer:
moles= w/mm
moles=150/30
moles=5
A 2.00 L flask is filled with propane gas (C3H8) at a pressure of 1.10 atm and a temperature of 258 K. What is the mass of propane in the flask?
Answer:
m = 4.58 g.
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to realize this problem is solved via the ideal gas equation:
[tex]PV=nRT[/tex]
As we can calculate the moles of propane given the pressure, temperature and volume as shown below:
[tex]n=\frac{PV}{RT} \\\\n=\frac{1.10atm*2.00L}{0.08206\frac{atm*L}{mol*K}*258K} \\\\n=0.104mol[/tex]
Finally, since the molar mass of propane is 44.1 g/mol, we calculate the mass by following the shown below mole-mass conversion factor:
[tex]m=0.104mol*\frac{44.1g}{1mol}\\\\m= 4.58g[/tex]
Regards!
Hypothetical element A has three stable isotopes. The first isotope has a mass of 35.01 amu and an abundance of 35.00%. The second isotope has a mass of 36.01 amu and an abundance of 15.00%. The third isotope has a mass of 37.02 amu and an abundance of 50.00%. What is the atomic mass of element A
Answer:
36.16 amu
Explanation:
From the question given above, the following data were obtained:
1st Isotope:
Mass of 1st isotope = 35.01 amu
Abundance of 1st isotope = 35%
2nd isotope:
Mass of 2nd isotope = 36.01 amu
Abundance of 2nd isotope = 15%
3rd isotope:
Mass of 3rd isotope = 37.02 amu
Abundance of 3rd isotope = 50%
Atomic mass of element A =?
The atomic mass of element A can be obtained as follow:
Atomic mass = [(mass of 1st × Abundance)/100] + [(mass of 2nd × Abundance)/100] + [(mass of 3rd × Abundance)/100]
= [(35.01 × 35)/100] + [(36.01 × 15)/100] + [(37.02 × 50)/100]
= 12.25 + 5.40 + 18.51
= 36.16 amu
Thus, the atomic mass of element A is 36.16 amu
Titan, the largest moon of Saturn, has an atmosphere that is about 94% nitrogen (N2) and 6% methane (CH4). The molecular mass of nitrogen is 4.651e-26kg and the molecular mass of methane is 2.663e-26kg. The acceleration due to gravity at the surface is about 1.35 m/s^2. For this problem, assume that Titan's atmosphere is in thermal equilibrium at 100 K. What fraction of the atmosphere is methane at altitude 2 km
Answer:
9.493 e-01
Explanation:
Given that Titan's temperature at thermal equilibrium = 100 K
Determine the fraction of the atmosphere that is methane
at an altitude of 2 km
applying Ideal gas law
P = Po e^ -Z/k ---- ( 1 )
In this question Z = M₀ g z ( replace -Z in equation 1 with M₀gz )
P = Po e^- M₀gz / RT ------ ( 2 )
where : Mo = 16 * 10^ -3 kg/mol , g = 1.35 m/s^2 , z = 2 * 10^3 m , R = 8.3 J/mol.k , T = 100 k
insert values Back to equation 2
P = Po e^-0.052
P = 0.9493 Po
hence the fraction of the atmosphere that is methane
= P / Po = 9.493 * 10^-1
= 9.493 e-01
Considering the side chain of each of the amino acids at pH 7.4, is that amino acid classified at neutral, basic, or acidic? You are currently in a sorting module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop. Neutral Basic Acidic
Answer:
Considering the side chain of each of the amino acids at pH 7.4, is that amino acid classified at neutral, basic, or acidic? You are currently in a sorting module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop. Neutral Basic Acidic
The answer is in the the images. I have placed all the structures in the specific boxes. I hope this helps.
When the pressure and number of particles of a gas are constant, which of the following is also constant
34. Which statement describes what occurs in the
following redox reaction?
Cu(s) + 2Ag (aq) → Cu2+ (aq) + 2Ag(s)
(1) Only mass is conserved.
(2) Only charge is conserved.
3 Both mass and charge are conserved.
(4) Neither mass nor charge is conserved.
Answer:
3 Both mass and charge are conserved.
Explanation:
The equation of the reaction is;
Cu(s) + 2Ag+ (aq) → Cu2+ (aq) + 2Ag(s)
A redox reaction is an acronym for oxidation-reduction reaction. This refers to a reaction in which the oxidation number of one specie is increased while the oxidation number of the other specie is decreased.
This means that one specie looses electrons while the other specie gains electrons. Here, Cu(s) looses electrons while Ag+(aq) gains electrons from left to right in the reaction.
In a redox reaction, both mass and charge are conserved. This means that the total mass and charge on the reactants side is the same as the total mass and charge on the products side.
Please hurry! And help!!
Best answer gets marked Brainliest!
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When two nitrogen atoms combine, they form a
A) Compound
B) Liquid
C) mixture
D) Molecule
Answer:
I guess the answer is compound
Explanation:
Coz compound it is on there playing with me again Go ahead and paste it in the class
Deep sea divers can experience the bends due to an increased amount of nitrogen in the blood
with higher pressure if they dive deeper than 40 meters and come up too fast. If at 1.05 atm
(surface conditions) the solubility of nitrogen, N2, is 21.1 mg/L, what is the solubility at this 40m
depth where the pressure is 4.97 atm?
a. 21.1 mg/L
b. 42.2 mg/L
C. 49.9 mg/L
d. 99.9 mg/L
b is the correct answer
Answer: D. 99.9mg/L
Explanation:
21.1x4.97/1.05=99.9
HELP HELP HELP
NH3 + NO + N2 + H2O
5. Given 8.25 x 1025molecules of ammonia, determine the number of grams of
nitrogen produced.
Answer:
4NH3+6NO+5N2+6H20
Explanation:
I
Gggggggggggggsgstststsysgtetwtwtst
Answer:
ummm u ok?
Explanation:
what is the definition of isomerism
Answer:
Isomerism is the phenomenon in which more than one compounds have the same chemical formula but different chemical structures. Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers. Therefore, the compounds that exhibit isomerism are known as isomers.
The word “isomer” is derived from the Greek words “isos” and “meros”, which mean “equal parts”. This term was coined by the Swedish chemist Jacob Berzelius in the year 1830.
Explanation:
How many grams of chlorine are required in order to consume 100g of sodium chloride?
Answer:
92.1 g
Explanation:
Answer: 92.1 grams
I hope this helped :3
One liter of a gas is in a sealed chamber containing a moveable piston. If the piston is moved so that the volume of the gas is compressed to a volume of one-half liter, what will happen to the pressure on the gas? (Assume the temperature is constant and no gas particles are lost.)
Answer:
One liter of a gas is in a sealed chamber containing a moveable piston. ... It would be impossible to move the piston since gases are not compressible. The pressure will be twice the original value.
Explanation:
In the reaction below does water acts as the acid or as the base?
H2S + H20 - HS1- + H30+ *
O a. Neither, water is neutral
O b. Acid
O C. Base
Answer:
C. Base.
Explanation:
Hello there!
In this case, according to the given information, it turns out convenient for us to realize that the concept acid and base we should use here is based off the Bronsted-Lowry one, which says that an acid is a hydrogen donor. In such a way, since water accepts one H ion as it goes to H3O⁺, we infer it is C. Base and the H2S the acid.
Also, we can tell HS⁻ is the conjugate base and H3O⁺ the conjugate acid.
Regards!
The picture below shows a NASA image of the Oort cloud, a sphere of objects that are thought to surround Earth's solar system at a distance of up to one light-year from the Sun.
If the Oort cloud does exist, which of the following could explain why the objects in it may have formed this spherical shape?
A
They are held in orbits by the Sun's gravitational force.
B
They are held in Earth's solar system by Neptune's magnetic field.
C
They float freely in space because the Sun's gravitational force is too weak to hold them in orbit.
D
They are held in stationary positions around Earth's solar system by other stars in space.
The gravitational pull of the Sun keeps them in their orbits. The gravitational pull of the Sun and surrounding stars combined is most likely what gives the Oort cloud its spherical shape.
What does NASA's Oort Cloud mean?The Oort Cloud is a spherical layer of ice objects that is thought to be located between 2,000 and 100,000 astronomical units (AU) from our Sun, a star.
What makes it the Oort Cloud?The Oort cloud, so named after the Dutch astronomer Jan Oort who first confirmed its existence, is a collection of objects with a combined mass estimated to be 10-100 times that of Earth that are less than 100 km (60 miles) across and maybe trillions in number.
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Which substance has Delta.Hf defined as 0 kJ/mol?
A. H2O (s)
B. Ne (l)
C. F2 (g)
D. CO2 (g)
Answer:
its actually c
Explanation: