Answer:
[tex]h=12.9cm[/tex]
Explanation:
Hello!
In this case, since we can consider the beaker until the 100-mL mark as a cylinder, we can use the following equation to relate its diameter, vertical distance or height and volume:
[tex]V=\pi h\frac{d^2}{4}[/tex]
Thus, since we know the diameter, volume (which is equivalent to 600 cm³) and π, we can plug in to obtain:
[tex]600cm^3=\pi *h*\frac{(77.0mm)^2}{4}[/tex]
It means it is necessary to take the mm to cm and solve for h:
[tex]h=\frac{600cm^3}{\pi*\frac{(7.70cm)^2}{4}} \\\\h=12.9cm[/tex]
Best regards!
The distance between each 100 mL mark is 2.15 cm.
The volume of a cylinder is obtained using the formula;
V = πr^2h
Now, we have the following information;
Volume of the cylinder = 600. mL or 600 cm^3
Diameter of the cylinder = 77 mm or 7.7 cm
Radius of the cylinder = 7.7/2 = 3.85 cm
Height of the cylinder = h
Hence;
600 = 3.142 × ( 3.85 )^2 × h
h = 600/3.142 × ( 3.85 )^2
h = 12.88 cm
There are six 100 mL marks on the beaker, the distance between each 100 mL mark = 12.88 cm/6 = 2.15 cm
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what is bohr's model?
Answer:
In atomic physics, the Bohr model or Rutherford–Bohr model, presented by Niels Bohr and Ernest Rutherford in 1913, is a system consisting of a small, dense nucleus surrounded by orbiting electrons—similar to the structure of the Solar System, but with attraction provided by electrostatic forces in place of gravity.
Answer:
BOHR'S MODEL OF ATOM :
In order to overcome the objections raised against Rutherford's model of the atom, Neils Bohr put forward the following postulates about the model of an atom:
(i) Only certain special orbits known as discrete orbits of electrons, are allowed inside the atom.(ii) While revolving in discrete orbits the electrons do not radiate energy.These orbits or shells are called energy levels. Energy levels in an atom are shown in Fig.
There orbis for shells are represented by the letters K,L,M,N... or the number n = 1,2,3,4...
ABOUT BOHR :
Neils Bohr (1885-1962) was born in Copenhagen on 7 October 1885. He was appointed professor of physics at Copenhagen University in 1916. He got the Nobel prize for his work on the structure of atom in 1922. Among Professor Bohr's numerous writings. three appearing
s books are:
(i) The Theory of Spectra and AtomicConstitution. (ii) Atomic Theory and.(iii) The Description of Nature————————————————Which process creates two new cells from one existing cell in order to maintain homeostasis? (4 points) a Cell division b Cellular respiration c Photosynthesis d Reparation
Answer:
Cell division.
Explanation:
10. Which of these is not a mixture? *
O Oil and Water
O Sand and Soda
O Diet Soda
O They are all mixtures.
Answer:
They all are mixture I think.
1. Your knee cap (patella) is just a hard cartilage. True or False?
2.When a muscle is working it can only contract, or get shorter. True or False?
3. When a muscle is NOT working, the opposing muscle is contracting and THIS is what moves the bone True or False?
4. What is the soft tissue between bones called?
5. What do Tendons do
6. What do you have that an octopus doesn’t have... physically?
A local FM radio station broadcasts at an energy of 6.04E-29 kJ/photon. Calculate the frequency at which it is broadcasting.
Answer:
9.11×10⁷ Hz
Explanation:
From the question given above the following data were obtained:
Energy (E) = 6.04×10¯²⁹ KJ
Frequency (f) =?
Next, we shall convert 6.04×10¯²⁹ KJ to joule (J). This can be obtained as follow:
1 KJ = 1000 J
Therefore,
6.04×10¯²⁹ KJ = 6.04×10¯²⁹ KJ × 1000 J / 1 KJ
6.04×10¯²⁹ KJ = 6.04×10¯²⁶ J
Thus, 6.04×10¯²⁹ KJ is equivalent to 6.04×10¯²⁶ J.
Finally, we shall determine the frequency at which the FM radio station is broadcasting as follow:
Energy (E) = 6.04×10¯²⁶ J
Planck's constant (h) = 6.63×10¯³⁴ Js
Frequency (f) =?
E = hf
6.04×10¯²⁶ = 6.63×10¯³⁴ × f
Divide both side by 6.63×10¯³⁴
f = 6.04×10¯²⁶ / 6.63×10¯³⁴
f = 9.11×10⁷ Hz
Therefore, the frequency at which the FM radio station is broadcasting is 9.11×10⁷ Hz
Kichi made a table to identify where she might find acids and bases in her house based on their common uses. Substance ammonium hydroxide sulfuric acid citric acid potassium hydroxide Location cleaning cabinet cosmetics bag refrigerator flashlight What error did Kichi make?
Ammonium hydroxide would be found in the pantry because it is found in vinegar.
Sulfuric acid would be found in the garage because it is used in car batteries,
Citric acid would be found in the garage because it is used to clean rust from metal.
Potassium hydroxide would be found in the kitchen cabinet because it is used in oven cleaner.
Answer:
Kichi made the an error in the 2nd row which is Sulfuric acid.
Sulfuric acid would be found in the garage because it is used in car batteries
Explanation:
Ammonium hydroxide (NH4OH) is used in household cleaners.
Sulfuric acid (H2SO4) is used in industrial chemicals and car batteries.
Citric acid (H3C6H5O7) is in lemons, limes, and oranges.
Potassium hydroxide is used in batteries.
Kichi made a mistake while locating sulfuric acid which is an acid and is used car batteries ,hence it should be found in garage rather than in cosmetics bag.
What is an acid?Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Compounds HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.
According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic acids depending on the number of protons which are liberated on dissociation.
Acids are widely used in industries for production of fertilizers, detergents batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.
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at the molecular level what form of energy do the molecules have?
Answer:
kinetic energy I think so
The form of energy molecules have at the molecular level is Kinetic energy.
Kinetic energy is defined as the energy possessed by a body as a result of its motion or movement.
Molecules interact with one another through various movements that occur
within them. This happens to aid the formation of new substances in the
ecosystem. The three states of matter exhibit varying degree of movement
within its molecules.
The energy is usually in the form of chemical energy also and is the reason
why kinetic energy is the most suitable choice.
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b. Which two neutral elements have different numbers of protons but similar properties?
Answer:
Helium and neon
Explanation:
The compound sodium nitrate is a strong electrolyte. Write the transformation that occurs when solid sodium nitrate dissolves in water.
Answer and Explanation:
Since the compound sodium nitrate (NaNO₃) is a strong electrolyte, it dissociates completely into ions when is dissolved in water, as follows:
NaNO₃(s) → Na⁺(aq) + NO₃⁻(aq)
So, the solid compound produces the sodium cation (Na⁺) and the nitrate anion (NO₃-) in the aqueous medium.
Equilibrium occurs in what type of reactions?
A. Catalytic
B. Irreversible
C. Reversible
D. Combustion
Answer:
B. Irreversible
Explanation:
Answer: C Reversible
Explanation:
Founder's Education Quiz
Which reaction is the opposite of a decomposition reaction?
Question 3 options:
Electrolysis of Water
Synthesis
Combustion
Explosion
Answer:
B) Synthesis reaction
Explanation:
synthesis reactions because they take apart larger molecules or compounds
Hope that helps
What is molarity measured the concentration of
The reaction where sodium (Na) reacts with water to produce hydrogen gas is a type of reaction.
Answer:
In what way and in what form does sodium react with water? A colourless solution is formed, consisting of strongly alkalic sodium hydroxide (caustic soda) and hydrogen gas. This is an exothermic reaction.
What do tissues combine to form?
A. organisms
B. cells
C.organ systems
D. organs
Why is the boiling point of 2 nitrophenol different from that of 4 nitrophenol
Answer:
See explanation
Explanation:
The nature of hydrogen bonding in 2- nitrophenol and 4- nitrophenol is quite different.
In 2- nitrophenol, there is intramolecular hydrogen bonding. As a result of this, the compound has a low boiling point.
Then in 4- nitrophenol, there is intermolecular hydrogen bonding. This accounts for molecular association and higher boiling point in 4- nitrophenol.
_____________________________________ are changes in an organism’s genetic material.
Answer:
The answer is Evolution.
Evolution is a process that results in changes in the genetic material of a population over time. Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species.
Which of the following is the best example of a heat conductor?
A
a plastic cup
B
a wooden chair
C
a fabric potholder
D
a metal frying pan
Answer:
hope it helps you
Explanation:
i think is d
The mass % of Ca in CaSO4 is 29.45%. To calculate the mass of Ca present in a 25.6-g sample of this compound, the correct procedure is given by _____.
Answer:
The correct answer is - 29.45 / 100 x 25.6 = 7.5392 grams
Explanation:
It is given in the question that in 100 gms of CaSO4 there are 29.45 grams of Ca present and there is 25.6 gram of total CaSO4 sample present, So, to calculate the exact value of calcium in this given sample is:
mass of Ca = total amount of sample*percentage of calcium in sample /100
M of Ca =25.6*29.45/100
M of Ca = 7.5392 grams
Thus, the correct procedure is given by 29.45 / 100 x 25.6 = 7.5392 grams
A compound is found to contain 2.270 % hydrogen, 34.80 % phosphorus, and 62.93 % oxygen by mass. What is the empirical formula for this compound
Answer: The empirical formula is [tex]H_4P_2O_7[/tex]
Explanation:
If percentage are given then we are taking total mass is 100 grams.
So, the mass of each element is equal to the percentage given.
Mass of H= 2.270 g
Mass of P = 34.80 g
Mass of O = 62.93 g
Step 1 : convert given masses into moles
Moles of H = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{2.270g}{1g/mol}=2.270[/tex]
Moles of P = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{34.80g}{31g/mol}=1.122[/tex]
Moles of O = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{62.93g}{16g/mol}=3.933[/tex]
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For H = [tex]\frac{2.270}{1.122}=2[/tex]
For P= [tex]\frac{1.122}{1.122}=1[/tex]
For O = [tex]\frac{3.933}{1.122}=3.5[/tex]
The simples ratio will be = H: P : O= 4: 2: 7
Hence the empirical formula is [tex]H_4P_2O_7[/tex]
Which correctly lists three characteristics that are used to describe air?
O Altitude, density, radiation
O Density, radiation, mass
O mass, pressure, density
O pressure, altitude, radiation
Answer:
Mass Pressure and density.
Explanation:
11. Everybody loves Mr Brown
Answer:
NO I DON'T ✌✌✌✌✌✌✌✌✌
PLZ
how many molecules are in 2so4
Answer:
1 grams (NH4)2SO4 to mol = 0.00757 mol 10 grams (NH4)2SO4 to mol = 0.07568 mol 50 grams (NH4)2SO4 to mol = 0.37839 mol 100 grams (NH4)2SO4 to mol = 0.75678 mol
Explanation:
Find the molar mass of C3H60
Answer:
The molar mass and molecular weight of C3H6O is 58.0791.
Explanation:
Which of the following would be most likely to experience strong intermolecular forces?
A. Molecules that contain no electrically charged regions.
B. Molecules that contain atoms of oxygen.
C. Molecules that are composed of solely ions.
D. Molecules that have both negatively and positively charged parts.
Answer:
The correct answer is D
Explanation:
Just took quiz
what are van allen belts?
Answer:
A Van Allen radiation belt is a zone of energetic charged particles, most of which originate from the solar wind, that are captured by and held around a planet by that planet's magnetic field. Earth has two such belts, and sometimes others may be temporarily created
Explanation:
Decide which element probably forms a compound with hydrogen that has a chemical formula most and least similar to the chemical formula of the compound formed by hydrogen and sulfur.
Answer:
Most similar- oxygen
Least similar- sodium
Explanation:
The complete question is shown in the image attached.
Now let us consider all the options in the questions carefully. We do know that hydrogen forms covalent bonds with sulphur. Two hydrogen atoms form form two polar covalent bonds with one sulphur atom. The molecule is bent owing to the presence of two lone pairs of electrons on the sulphur central atom.
Oxygen is in the same group as sulphur in the periodic table. The compound between hydrogen and sulphur is strikingly similar to the compound formed between sulphur and hydrogen due to chemical similarity of compounds of elements in the same group of the periodic table. Hence H2O bears the greatest similarity to H2S.
The bond between hydrogen and halogens is also polar covalent but less similar to the bond between sulphur and hydrogen.
Lastly, the bond between hydrogen and sodium is ionic and least similar to the bond between hydrogen and sulpur. We actually have in that compound, Na^+ H^-. Sodium transfers one electron to hydrogen as is implied in the ionic formula shown.
Hence the answer above.
Plsss name this compound
Explanation:
It looks like 2,2,4-trimethylpentane.
Longest alkane chain contains 5 carbons. => -pentane
3 methyl groups on the 2nd, 2nd and 4th carbons.
What type of compound is Sodium hydroxide?
A.acid
B.base
C.element
D.salt
Answer: B: Base
Explanation: I took the test
if x-2 is a factor of x^m - 3x^m-1 +4x-4,find the value of m.
Explanation:
By Factor Theorem,
(2)^m - 3(2)^(m-1) + 4(2) - 4 = 0.
=> 2^m - 1.5 * 2^m + 4 = 0
=> 4 - 0.5 * 2^m = 0
=> 0.5 * 2^m = 4
=> 2^m = 8
=> m = 3.
Hence the value of m is 3.
What would you use to determine whether an acid or alkali has been added to a solution?
A. Reactant
B. Indicator
C. Adjustor
D. Identifier
Answer:
B. Indicator
Explanation:
An indicator is used to determine whether an acid or alkali has been added to a solution.
Indicators can be liquid or a paper called litmus paper. There also some digital forms of indicators that can tell whether an acid or alkali has been added to a solution.
An acid and alkali will change the pH of a solution. pH is the amount of hydrogen ions that are in a solutionSo, these changes in the pH when an acid or alkali is introduced is usually monitored using indicators. Examples of indicators are litmus paper, methyl orange, methyl red, bromothymoblue