Answer:
[tex]\boxed {\boxed {\sf 12.5 \ mL \ NaOH}}[/tex]
Explanation:
In a neutralization reaction, an acid and base react to form salt and water. The hydrogen ions (H+) and hydroxide ions (OH-) combine to form water, while the other spectator ions bond to make salt.
For this reaction, the acid is HCl (hydrochloric acid) and NaOH (sodium hydroxide).
The H (from HCl) and OH (from NaOH) combine to make water (HOH or H₂O). The other ions, Cl and Na combine to form NaCl or sodium chloride. Let's write the neutralization reaction.
[tex]HCl _{(aq)}+NaOH _{(aq)} \rightarrow NaCl _{(aq)} + H_2O _{(l)}[/tex]
Now let's perform the calculation. We should use the titration equation or:
[tex]M_AV_A= M_BV_B[/tex]
where M is the molarity of the acid or base and V is the volume.
We know there are 25 milliliters of 1 molar HCl (acid) and an unknown volume of 2 molar NaOH (base).
[tex]\bullet M_A= 1 \ M \\\bullet V_A= 25 \ mL \\\bullet M_B= 2 \ M[/tex]
Substitute the known values into the formula.
[tex]1 \ M * 25 \ mL = 2 \ M * V_B[/tex]
Since we are solving for the volume of the base, we must isolate the variabel. it is being multiplied by 2 M and the inverse of multiplication is division. Divide both sides by 2 M.
[tex]\frac { 1 \ M * 25 \ mL}{2 \ M }=\frac{2 \ M * V_B}{2 \ M}[/tex]
[tex]\frac { 1 \ M * 25 \ mL}{2 \ M }= V_B[/tex]
The units of M cancel.
[tex]\frac { 1 * 25 \ mL}{2 }=V_B[/tex]
[tex]\frac {25}{2} \ mL= V_B[/tex]
[tex]12.5 \ mL= V_B[/tex]
12.5 milliliters of 2 M sodium hydroxide are required to neutralize 25 mL of 1 M hydrochloric acid.
What are mycelium
??????????
Answer:
Mycelium is a group of hyphae which are fungus.... these are like roots in structure
Answer:
A mycelium is the vegetative part of a fungus, consisting of a network of fine white filaments
Explanation:
1. Suppose the mechanical advantage of a machine is 4, and the input force is 20 N.
What is the output force?
0 16 N
0 24 N
80 N
O5N
Answer:
80 N
Explanation:
you can multiple
force equal to mass x gravity
What is the mass number of a atom with 10 protons and 13 neutrons
Identify each statement below as an example of science or pseudoscience. Magnets can cure arthritis.
Answer:
pseudoscience
Explanation:
A pseudoscience may be defined as certain beliefs and statements or practices that are mistakenly regarded as a practice that is based on scientific method. These practices are claimed and thought to be factual as well as scientific, but they are incompatible with any scientific method.
One such pseudoscience is the belief that magnets can cure arthritis. It is a common belief that magnet therapy cab ease and provide a relief from the arthritis pain but scientific studies have confirmed that such treatments are ineffective for the arthritis pains and problems.
What is the new concentration of a solution of CaSO3 if 10.0 mL of a 2.0 M CaSO3 solution is diluted to 100 ml?
Answer: The new concentration of a solution of [tex]CaSO_{3}[/tex] is 0.2 M 10.0 mL of a 2.0 M [tex]CaSO_{3}[/tex] solution is diluted to 100 mL.
Explanation:
Given: [tex]V_{1}[/tex] = 10.0 mL, [tex]M_{1}[/tex] = 2.0 M
[tex]V_{2}[/tex] = 100 mL, [tex]M_{2}[/tex] = ?
Formula used to calculate the new concentration is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\10.0 mL \times 2.0 M = M_{2} \times 100 mL\\M_{2} = 0.2 M[/tex]
Thus, we can conclude that the new concentration of a solution of [tex]CaSO_{3}[/tex] is 0.2 M 10.0 mL of a 2.0 M [tex]CaSO_{3}[/tex] solution is diluted to 100 mL.
Which of the following describes the functions of the liver?
I. It cleans the blood by removing wastes and harmful substances.
II. It helps with digestion of food.
III. It produces bile.
I and II
I and III
II and III
I, II, and III
Answer: 2 and 3
Explanation:II and III
Pls answer this Il give brainiest question in picture ty
Answer:
c
Explanation:
troposphere is the answer
how many moles of ions is in Magnesium chloride?
are manifested as
instantaneous charge differences due
to molecular interactions.
Dipole-dipole
interactions
Dispersion
forces
Hydrogen
bonds
dipole: dipole interactions
- dispersion forces (London forces)
- hydrogen bonds
as the attractive forces between molecules becomes larger, it takes more energy to separate them
- as a result, vapor pressures, boiling points and melting points will be larger
occur between molecules that have a permanent dipole moment
- H-Cl----H-Cl
To determine the molar mass of an element, one must know the element's
a. number of isotopes.
b average atomic mass
c avogradro constant
d atomic number
Answer:
d
Explanation:
from you know the atomic number it should be easy to find
To determine the molar mass of an element, one must know the element's atomic number. Therefore, option D is correct.
What is the atomic number ?An element's atomic number (Z) is the number of protons in the nucleus of each atom of that element. This means that the number of protons is the feature that distinguishes each element from all others. Elements differ based on their atomic number.
Because the combined masses of protons and neutrons account for nearly all the mass of a given atom, the atomic mass of a single atom can be calculated by adding the total number of protons and neutrons of that particular isotope.
The atomic mass of any element on the periodic table can be used to calculate its molar mass.
Thus, option D is correct.
To learn more about an atomic number, follow the link;
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Condensation
11.What is condensation?
(1 Point)
change from solid to liquid
change from solid to gas
change from liquid to solid
change from liquid to gas
change from gas to solid
change from gas to liquid
12.What happens to the motion of particles after condensation?
(1 Point)
faster
slower
13.What happens to the kinetic energy of particles after condensation?
(1 Point)
increased
decreased
14.What happens to the distance between particles after condensation?Immersive Reader
(1 Point)
smaller
wider
11. change from gas to liquid
12. slower
13. increased
14. smaller
thenks and pls mark me brainliest :))
16. The passage of salts into and out of cells is most
closely associated with the life process of
A. transport
B. respiration
C. reproduction
D. digestion
Answer:
A. transport
Explanation:
yan po sana makatulong
A good year blimp (a huge airship) is filled to a
volume of 1,800L at a temperature of 35°C. As
the weather changed the blimp is then cooled
at constant pressure to a temperature of -46°C.
What is the final volume of the blimp?
Answer:
V₂ = 1326.62 L
Explanation:
Given that,
Initial volume, V₁ = 1800 L
Initial temperature, T₁ = 35°C = 308 K
Final temperature, T₂ = -46°C = 227 K
We need to find the final volume of the blimp. The relation between volume and temperature is given by :
[tex]\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{1800\times 227}{308}\\\\V_2=1326.62\ L[/tex]
So, the final volume of the blimp is 1326.62 L.
Calculate the weight of keame if he has potential energy of 67J and standing at a hieght of 10m.(take g100m/s)
Answer:
height(h)=10 m
acceleration due to gravity (g)=10 m/s^2
mass (m)=?
potential energy=67
or,mgh= 67
or,m×10×10=67
or,m=67/100
or,m=0.67 kg
Therefore,m= 670 grams
EMERGENCY HELP ME OUT
Answer:
D, The volume will be multiplied by a factor of 4
Explanation:
First find the height
V = π(r^2)h
Plug in what we know
83 = π(3^2)h
83 = π(9)h
83 = (9π)h
9[tex]\pi[/tex] = 28.27
83/28.27 = (28.27)h/28.27
h = 2.94
Then find the volume of the new can by doubling the radius
3 x 2 = 6
r = 6
V = π(r^2)h
V = π(6^2)2.94
V = π(105.84)
V =332.51
For the first one, they rounded to the nearest whole #, so let's do the same.
V = 333
Then divide 333 by 83 to get 4
Therefore, the volume will be multiplied by a factor of 4
What controls the DNA molecule?
Answer:
nucleotides
Explanation:
The four types of nitrogen bases found in nucleotides are: adenine (A), thymine (T), guanine (G) and cytosine (C). The order, or sequence, of these bases determines what biological instructions are contained in a strand of DNA. ... DNA is made of chemical building blocks called nucleotides.
hope that helped :)
Thermal energy is a measure of the __________ of particles of matter. *
(subject is science I just cant change it right now)
Balancing equations helps please !!
Explanation:
3. 2AlBr3 + 3k2SO4----------> 6KBr + Al2(SO4)3
stay safe healthy and happy.HELP PLS!!!!!
Calculate the mass percentage of water in the formula Na2OCO3 x 10H20
Answer:
The mass percentage of water of crystallization in washing soda is 62.9 %. But the molar mass of Na2 CO3 • 10H2 O is 286.1412 g/mol and the Na2CO3 • 10H2O % by mass H2O.
SO your full answer is 286.1412 g/mol
Explanation:
plz brian list
Help needed ASAP, I will mark your answer as brainliest.
Where does much of our history of Precambrian rocks come from? fossils on the rock surface ores mined from shields ash taken from volcanoes trenches on the sea floor
Answer:
Ores mined from shields.
Explanation:
Ores mined from shields are the source from which we get the history of Precambrian rocks. The Ores from shield experience the Precambrian era so that's why its rocks provides information about that era. The Precambrian supereon is the division of the geological time scale which is the first and longest stage in the history of the Earth which also includes the Hádic, Archaic and Proterozoic eons.
what the total charge of an atom with 8 protons 10 neutrons and 10 electrons?
Answer:
since an oxygen atom normally has 8 protons and 8 electrons, this ion has 10 electrons (-10 charge) and 8 protons (+8 charge) giving it a charge of -2 (-10 + 8 = -2).
Explanation:
A sample of chlorine gas is stored at a temperature of -25oC. If the chlorine gas's temperature is raised to 52oC, its volume increases to 2.60 L. What is the initial volume of the gas?
Answer:
whats ur answer options
Explanation:
...
its b
Organize the following list of atoms from highest to lowest Atomic Radius:
Sulfur, Aluminum, Sodium, Chlorine, Argon, Silicon
The back of a water droplet acts as a mirror. When light hits the back of the water droplet, it bounces back to our eyes. This is called ____________.
Provide one example where a neutralization reaction is undesired/harmful. State the reactants and explain why it is harmful for this reaction to take place.
Answer:
You're in my science class wth
Explanation:
For instance farmers are using basic fertilizers to neutralize an acid soil –which is harmful for the plants- while basic solutions are added in the chimneys of factories to neutralize the acid smoke that they produce –avoiding the catastrophic effects of the acid rains. Acid released in the environment from industry creates acid rain which has many ecological effects. Acid rain makes waters acidic, and causes them to absorb the aluminium that makes its way from soil into lakes and streams. This combination makes waters toxic to crayfish, clams, fish, and other aquatic animals.
A scientist plans the react 9.0x10^-2 L NO held at a pressure of 200.0kPa and a temperature of 20.0 C with excess hydrogen. How many moles of nitrogen gas will be produced
Answer:
[tex]n_{N_2}=0.00369molN_2[/tex]
Explanation:
Hello there!
In this case, by firstly setting up the described chemical reaction, we are able to write:
[tex]2NO(g)+2H_2(g)\rightarrow N_2(g)+2H_2O(g)[/tex]
Thus, given the pressure (convert to atm), volume and temperature (convert to K) we can calculate the moles of NO:
[tex]n=\frac{PV}{RT}\\\\n=\frac{200.00/101.325atm*0.090L}{0.08206\frac{atm*L}{mol*K}*(20.0+273.15)K} \\\\n=0.00738molNO[/tex]
Next, we use the 2:1 mole ratio of NO to N2 to obtain the moles of nitrogen gas that will be produced:
[tex]n_{N_2}=0.00738molNO *\frac{1molN_2}{2molNO} \\\\n_{N_2}=0.00369molN_2[/tex]
Regards!
Which statement accurately describes the formation of a covalent bond?
a. Protons are shared between atoms.
b. Electrons are shared between atoms.
c. Protons are transferred from one atom to another.
d. Electrons are transferred from one atom to another.
Answer: b. Electrons are shared between atoms
Explanation: electrons are shared, forming molecules, covalent compounds have weaker forces holding the molecules together
find the no of atoms of Fe in 2 moles of Fe
Answer:
1mole of any substance contains 6.022x10²³atoms
2moles of Fe will contain
2x6.022x10²³atoms = 1.204x10²⁴atoms.
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The ratio of the mass of U-238 to the mass of Pb-206 can be used to
1.
diagnose thyroid disorders
2.
diagnose kidney function
3.
date geological formations
4.
date once-living things
Answer:3)date geological formations
Explanation:
The ratio of the mass of U-238 to the mass of Pb-206 can be used to date geological formations.
Use of radioactive elementsRadioactive elements have unstable nucleus and they can be used for dating.
Examples of radioactive elementsUranium 238Lead 206The ratio of the amounts of U 238 and Pb 206 in a rock sample enables the age of the rock to be estimated using the technique of radiometric dating.
Thus, the ratio of the mass of U-238 to the mass of Pb-206 can be used to date geological formations.
Learn more about radiometric dating here: https://brainly.com/question/8831242
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