Answer:
0.174kg of Ore are required
Explanation:
The ore of 37.3% in nickel by mass means that in 100g of ore there are 37.3g of nickel. As we need to obtain 65g of nickel we can convert this mass to mass of ore using the conversion factor (100g Ore / 37.3g Nickel) as follows:
65g of nickel * (100g Ore / 37.3g Nickel) = 174g of Ore are needed to have 65.0g of nickel. In kilograms:
174g Ore * (1kg / 1000g) =
0.174kg of Ore are requiredWhat is molarity measured the concentration of
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?
_____________________________________ 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.
b. Which two neutral elements have different numbers of protons but similar properties?
Answer:
Helium and neon
Explanation:
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:
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.
The gas in the discharge cell of a laser contains (in mole percent) 11% CO2, 5.3% N2, and 84% He. (a) What is the molar mass of this mixture
Answer:
[tex]MM_{mixture}=9.68g/mol[/tex]
Explanation:
Hello!
In this case, since the molar mass of gaseous mixtures can be determined via a weighted average containing the molar mass of each gas and the mole fraction (mole percent divided by 100) as shown below:
[tex]MM_{mixture}=x_{CO_2}M_{CO_2}+x_{N_2}M_{N_2}+x_{He}M_{He}[/tex]
Now, we plug in to obtain:
[tex]MM_{mixture}=0.11*44g/mol+0.053*28+0.84*4\\\\MM_{mixture}=9.68g/mol[/tex]
Best regards!
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.
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
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————————————————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, bromothymoblueat 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.
Read more on https://brainly.com/question/2627669
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:
What do tissues combine to form?
A. organisms
B. cells
C.organ systems
D. organs
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.
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:
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.
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
What type of compound is Sodium hydroxide?
A.acid
B.base
C.element
D.salt
Answer: B: Base
Explanation: I took the test
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 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
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:
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.
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.
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
11. Everybody loves Mr Brown
Answer:
NO I DON'T ✌✌✌✌✌✌✌✌✌
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
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.
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
Find the molar mass of C3H60
Answer:
The molar mass and molecular weight of C3H6O is 58.0791.
Explanation:
