Answer:
Explanation:
"Khối lượng NaOH rắn cần dùng để pha 500mL dung dịch NaOH 0,1M là bao nhiêu?" Để tạo ra dung dịch chứa một mol NaOH, cần hòa tan 40 gam NaOH trong 500mL H2O.
What NaCl concentration results when 294 mL of a 0.750 M NaCl solution is mixed with 637 mL of a 0.430 M NaCl solution
Answer:
0.531 mole/L = 0.531M
Explanation:
What NaCl concentration results when 294 mL of a 0.750 M NaCl solution is mixed with 637 mL of a 0.430 M NaCl solution?
294 ml X 0.75 moles/1000ml=0,294X0.750 = 0.2205 moles
637 ml X 0.430 moles/1000ml = 0.637 X 0.430= 0.2739 moles
0.2205 + 0.2739 = 0.4944 moles
this is distributed over 294 ml + 637 ml= 931ml
with a concentration of 0.4944 moles/0.931L or 0.531 mole/L = 0.531M
I need help with this
Answer:
26.00 units of Volume.....
The joining of nucleotide molecules to form a more complex nucleic acid is an example of: Select one: a. a decomposition reaction be. a denaturation reaction c. a synthesis reaction d. an exchange reaction e. a hydrolysis reaction
Answer:
Explanation:
C. A synthesis reaction
What element does hydrogen on in ?
- metals
- non metals
- metalloids
Answer:
non-metal
Explanation:
hydrogen is gas
this chart may also help :)
hydrogen is all the first element all the way to the left with the letter H
How are force, mass, and inertia related? A. An object that requires a larger force to accelerate has a greater mass and a greater inertia. B. An object that requires a larger force to accelerate has a smaller mass and a greater inertia. C. An object that requires a smaller force to accelerate has a smaller mass and a greater inertia. D. An object that requires a smaller force to accelerate has a greater mass and a greater inertia.
An object that requires a larger force to accelerate has a greater mass and greater inertia. Hence, option A is correct.
What is inertia?A property of matter by which it remains at rest or in motion in the same straight line unless acted upon by some external force.
The more mass found in an object, the more inertia it contains and therefore the greater its tendency to resist change.
That is precisely why applying a net force on two objects of different masses will cause the lighter mass to accelerate more than the object that has a higher mass.
An object that requires a larger force to accelerate has a greater mass and greater inertia. Hence, option A is correct.
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Answer: The answer is A
Explanation:
An object that requires a larger force to accelerate has a larger amass and a greater inertia
During the electrolysis of fused MgO, how much magnesium can be produced from a charge of 3.00 Faradays
The mass of magnesium, Mg that can be produced from the electrolysis of MgO using 3 faradays is 36 g
In the electrolyte, we have
Mg²⁺ + 2e —> MgRecall:
1 electron = 1 Faraday
1 mole of Mg = 24 g
From the balanced equation above,
2 Faradays produced 24 g of Mg.
With the above information, we can obtain the mass of magnesium, Mg that will be produced by using 3 faradays. This can be obtained as follow:
From the balanced equation above,
2 Faradays produced 24 g of Mg
Therefore,
3 Faradays will produce = (3 × 24) / 2 = 36 g of Mg
Thus, the mass of Mg obtained by using 3 faradays is 36 g
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when a gas undergoes an isothermal process, there is
Answer:
no change in the temperature of the gas.
Explanation:
isothermal process of a gas, can result to compression of the gas or expansion of the gas at a constant temperature (ΔT = 0).
For isothermal gas expansion, work is done in reducing the pressure of the gas by increasing its volume at a constant temperature. The change in the internal energy of this process is zero (ΔU = 0).
For isothermal gas compression, work is done in decreasing the volume of the gas by increasing its pressure at a constant temperature. The change in the internal energy of this process is also zero (ΔU = 0).
Therefore, when a gas undergoes an isothermal process, there is no change in the temperature of the gas.
Why is blood so essential for cell function to occur?
Explanation:
Blood Provides the Body's Cells with Oxygen and Removes Carbon Dioxide. Blood absorbs oxygen from air in the lungs. It transports the oxygen to cells throughout the body, and it removes waste carbon dioxide from the cells.
Your blood carries oxygen and nutrients to all of the cells in your body. Blood cells also fight infection and control bleeding.
elements in the s and p blocks of the periodic table are called
Answer:
Representative elements
Explanation:
¿Qué condición conduce a una tasa de envejecimiento más lenta?
rocas porosas
climas fríos
minerales duros
altas temperaturas
Answer:
Las altas temperaturas es la respuesta correcta.
Explanation:
¡Que tenga un buen día!
help refers to the position you should assume in cold water. what does help stand for?
Answer: HELP stands for - Heat Escape Lessening Posture.
Which of the following is in French
The floor is pink
A dog barks
A cup with steam coming from it will be hot to touch
Answer:
A dog barks
Explanation:
Which number is NOT a perfect square?
25
8
4
1
Answer:
8
Explanation:
According to the periodic trends,
Calcium has a greater atomic radius than magnesium
Answer:
nope but whats the question?
Use the galvanic cell reaction to answer the question.
2Cr(s) + 3Cu2+(aq) → 2Cr3+(aq) + 3Cu(s)
Which half reaction occurs at the cathode? (1 point)
3Cu2+(aq) + 6e– → 3Cu(s)
2Cr(s) → 2Cr3+(aq) + 3e–
3Cu2+(aq) + 2e– → 3Cu(s)
2Cr(s) → 2Cr3+(aq) + 6e–
Answer:
C, 3Cu2+(aq) + 2e– → 3Cu(s)
List 3 things you notice about the ingredients and recipes
Answer:
refer to attachment OK sir
The experimental apparatus represented above is used to demonstrate the rates at which gases diffuse. When the cotton balls are placed in the ends of a tube at the same time, the gases diffuse from each end and meet somewhere in between, where they react to form a white solid. Which of the following combinations will produce a solid closest to the center of the tube?
a. HCI and CH3NH2
b. HCl and NH3
c. HBr and CH3NH2
d. HBr and NH3
Not all reagents work well for all halides. Which reagents are best to identify the following elements?
Cl: a
Br:
I:
a. AgNO3
b. starch
C. NH3
d. Starch and Naoci
e. NaOCL
f. Ca(NO3)2
Answer:
Br is AgNO3 and I is Starch and NaOCI. I am not sure what CI is. I guessed NH3 and that was wrong.
Explanation:
Answer:
Cl: Starch
Br: AgNO3
I: Starch and Naoci
Explanation:
How many Zn atoms are in Zn(CIO3)2?
O A. 1
O B. 3
O c. 6
O D. 2
The Zn atom in Zn(CIO3)2 will be 1.
A chemical element however is uniquely defined by its atoms, which are tiny pieces of substance. An atom is made up of a core nucleus and one or perhaps more electrons with negative charges that orbit it. The positively charged, comparatively hefty protons and neutrons that make up the nucleus may be present.
The given chemical formula is :
Zn(CIO3)2
The number of Zn = 1
The number of Cl atom = 2
The number of O = 6
Hence, it can be said that there are 1 atom of Zn present in the Zn(CIO3)2 .
Therefore, the correct answer will be option (A)
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Which is an empirical formula?
1.
H202
2.
H20
3.
C₂H₂
4.
C3H6
Answer:
c2h2 is it..........
Explanation:
lol
How many mL in 5.867 L?
Answer:
5867ml is the answer to 5.867L to ml
1. A cell can be seen by looking through a microscope. Seeing which of these organelles
would let you know that you are looking at a plant cell?
A. Mitochondria
B. Chloroplast
C. Cell membrane
D. Nucleus
How you can minimize human impact on the environment?
How can you increase the strength of the magnetic force on an object like a paper clip?
Answer:
"Iron bar magnets Fill a bowl or pan with some water. Find something that will float on the water. Lay the magnet on top of this object. The magnet will twirl in the water until it comes to rest pointing exactly north and south due to the magnetic force of the North Pole."-- science.howstuffworks.com. Or you could just increase the surface area.
Explanation:
The strength of the magnet force is maximum at the poles and minimum at the centre. A magnet can exerts a magnetic force on the other magnets as well. Here by using the soft iron bar as the magnet, the strength of the magnetic force on an object can be increased.
A magnetic force is defined as the force that a magnet exerts on certain materials like iron, steel, nickel, etc. This type of force is a non-contact force because it can act from a distance.
By using iron bar magnet or by increasing the numbers of turns of the coil can pick up more paper clips.
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23.45g Cu(0H)2 x 1 mol Cu(0H)2 x 6,022 x 1023 mol Cu(0H) =
__g Cu(0H)2 1 mol Cu(0H)2
= ____molecules Cu(0H2)
please help
Answer:
I help u after my online class and intervieww
An electron domain consists of ________. a) a nonbonding pair of electrons b) a single bond c) a multiple bond
An electron domain consists of ; All of the above options i.e. a ) nonbonding pair of electrons b) a single bond c) a multiple bond.
An Electron domain is the number of bonded locations ( lone pair or bonded ) found around an atom. and the bond location is independent of the type of bonding existing between atoms in a molecule.
Electron domain are also known as electron groups. the types of electron domain are ; nonbonding pair of electrons and bonded atom.
Hence we can conclude that An electron domain consists of ; nonbonding pair of electrons, a single bond and a multiple bond.
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What is the difference between ounces and fluid ounces?
Answer:
Ounce measures weight, Fluid ounce measures volume
Explanation:
16 ounces = 1 pound (weight)
16 fluid ounces = 1 pint (volume)
Remember difference between volume and weight, which is that volume is the amount of space a object takes up, while weight is how heavy a object is.
Hope this helps.
Describe two applications of radioisotopes in medicine.
Answer:
Medicine
Explanation:
In nuclear medicine, tracer radioisotopes may be taken orally or be injected or inhaled into the body In radiotherapy, radioisotopes typically are employed to destroy diseased cells. Radiotherapy commonly is used to treat cancer and other conditions involving abnormal tissue growth, such as hyperthyroidism.
PLEASE HELP
Select the statements that are correct regarding this reaction.
This is a fusion process.
This is a fission process.
The mass of the products is exactly equal to the reactants.
Only the number of particles of product equals the number of particles of reactants.
Could be more than one answer
Answer:
This is a fusion process.
This is a fission process.
Explanation:
Select the statements that are correct regarding this reaction.
This is a fusion process.
This is a fission process.
The mass of the products is exactly equal to the reactants.
Only the number of particles of product equals the number of particles of reactants.
Could be more than one answer
Hydrogen 1 + Lithium 7 yields 2 Helium 4 plus energy
you have merged hydrogen 1 with Lithium 7 to produce a temporary berylium8, so it is fusion, because you are fusing the particles together.
the energy of the impact of the hydrogen on the lithium
causes the temporary berylium 8 to split into 2 helium atoms, so it is then fission, because you are splitting an atom of berylium8.
the mass of the reactants and products are not equal, because some of the energy comes from conversion of the reactant mass to energy by E=mcc
The number of reactant particles does equal the number of product particles, bute answer says ONLY which is not correct
In the given reaction, The mass of the products is exactly equal to the reactants. However this a radioactive process where, lithium and hydrogen react together forming two helium nuclei.
What is mass conservation?According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the total mass of a system is conserved. In a closed system the mass cannot be lost.
For a chemical reaction, new products are formed by regrouping of atoms from the reactants where no new atom is produced not any lost. Hence, the total mass in the reactant side will be equal to the total mass in the product side.
In the given reaction the number of particles are equal in both side as well mass too equal in both side. The total mass in reactant side and product side is 8.
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An electrolyte can be checked to ensure that it has correct chemical composition by measuring its _____.
Answer:
specific gravity
Explanation:
