Answer:
0.702 L H₂O
Explanation:
To find the volume of water needed to dilute the stock solution, you need to (1) find the moles of the stock solution (via molarity formula), then (2) find the volume of the diluted solution (via molarity formula), and then (3) find the volume of water needed.
(Step 1)
Molarity (M) = moles / volume (L) <----- Molarity formula
5 M = moles / 0.500 L <----- Insert values
2.5 = moles HCl <----- Multiply both sides by 0.500
(Step 2)
Molarity = moles / volume <----- Molarity formula
2.08 M = 2.5 moles / volume <----- Insert values
(2.08 M) x volume = 2.5 moles <----- Multiply both sides by volume
volume = 1.20 L <----- Divide both sides by 2.08
(Step 3)
Diluted Volume = 1.20 L
Stock Volume = 0.500 L
Water Volume = ? L
Diluted Volume = Stock Volume + Water Volume
1.20 L = 0.500 L + Water Volume
0.702 L = Water Volume
what is the answer to this
Answer:
Explanation:
i may be wrong but i think its b
Answer:
B Ndaira is right for real
What drives this process
Answer:
B
Explanation:
cool air never rises so not A
C would mean its getting warmer
and heat flows from warm to cool so not D
we are left with B
if my anwser helps please mark as brainliest.
what is the skeleton equation of 2Na + Cl2 → 2NaCl.
Answer:
Mark me as brienleist
Explanation:
mother aware to u
Find the mass of a person walking west at a speed of 0.8 m/s with momentum of 52.0 kg*m/s west.
Answer:
12 preguntas y no te sabes ni una sola valla el mundo se está acabando
Answer:
65 kg
Explanation:
m = p ÷ v
m= 52 ÷ 0.8
m = 65 kg
substances can be categorised in two ways: as an element, mixture or compound ora as a solid, liquid or gas. which
of these methods Is of most use ti chemist?
Answer:
Most substances on earth are compounds and most interesting chemistry is done with compounds. Most interesting chemistry is done with mixtures of compounds although they often start with pure compounds and then do reactions as mixtures. Most chemistry is carried out in liquid solutions made up of compounds that are solids, liquids, or gases in their pure form.
Explanation:
Here, we are required to determine which of these methods of classifying substances is most important to chemists.
The most useful classification of compounds to chemists is as Elements, Compounds or MixturesFirst classification of substances involves categorising them as pure substances (elements and compounds) or mixtures.
The second classification of substances is categorisation with respect to their state of matter. In essence, we can have solid, liquid or gas.
However, the most useful classification of compounds to chemists is as Elements, Compounds or Mixtures.This is so because, the type of matter present in Elements are distinct for each element, same as for Compounds and Mixtures formed from a combination of pure substances.
Chemists focus on the diverse properties of substances, as such classification as elements, compounds and mixtures provides a wide basis for the qualitative and quantitative analysis of the properties of substances.Classification of substances as solid, liquid or gas leaves a narrow avenue for the study of substances as the substance still contains the same type of matter, only this time in different states.Read more:
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I'll give Branliest to the most efficient and first answer.
1. What major change in our thinking about the path of a moving electron had to be made with the advent of quantum theory?
2. Calculate the wavelength of a space shuttle with a mass of 2.05 x 107kg traveling at a rate of 7.85 x 103 m/s.
Answer:
See explanation
Explanation:
1) With the advent of the quantum theory came the idea that the path of a moving electron can not be exactly determined. We can only talk about the probability of finding the electron within a given region in space.
2) Using the De Broglie's relation;
λ = h/mv
Where;
λ = wavelength
h = Plank's constant
m = mass
v = velocity
λ = 6.6 * 10^-34/2.05 x 10^7 * 7.85 x 10^3
λ = 4.1 * 10^-25 m
Which statement correctly describes soil horizon C? A. It is considered the subsoil layer. B. It is the horizon with the smallest rock pieces. C. It is also referred to as the bedrock layer. D. It is the horizon that contains the least humus.
Help I'll help y'all
heyyyyy.
Answer:
It's D, it is the horizon that contains the least humus.
Explanation:
I just did the test
The statement which correctly describes the soil horizon is option B. The horizon B contains the the smallest rock pieces. It is also called the subsoil layer.
What is soil horizon?Soil horizon contains different layers of soil which are classified based on the composition of the soil and the presence of rocks within the soil. The primary level of the soil is rich in humus. The decomposed of matter of plants and animals are called humus. On which the plants are growing.
The secondary level of soil horizon or the subsoil level contains some small rocks also onto which the roots of plants does not adhere so much. The third level of soil horizon contains bigger rocks with small gaps between them.
The last layer of the soil horizon is called bedrock layer containing bigger rocks with no significant gaps between them It is called the bedrock layer.
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It's football season! Big Bubba Brown is running full speed trying to tackle the quarterback before he throws the ball. Wham! He got him! What happens to Big Bubba Brown?
A. Bubba uses all of his energy to tackle the quarterback.
B. Bubba and the quarterback lose their energy and fall to the ground.
C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.
D. Bubba knocks the quarterback down and keeps running at the same speed as before the tackle.
this is science btw.
Answer:
C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.
Explanation:
I majored in Science
Answer:C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.
just did the usatestprep
How many atoms are in 11.5 g of Hg?
A. 5.73 x 10^-2 atoms
B.3.45 atoms
C.3.45 x 10^22 atoms
D. 5.73 atoms
How many atoms of Mg are present in 97.22 grams of Mg?
Answer:
2.439 x 10E24 atoms
Explanation:
from
N=n x NA where
N- number of atoms
n-number of moles and NA is the avogadro's number
how many mongo seed are equal to 3.50 moles of mongo seeds?
answer:
2.107 x 10^24 mongo seeds
Answer:
50 moles of many mango seeds = 2.107.10²⁴ mango
Further explanation
A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12
While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule
With Avogadro's number
N = number of gas particles
No = Avogadro number (6.02.10²³)
n = number of moles
n= N/No
3.50 moles of many mango seeds are comparable to
N mango seeds= 3.5 x 6.02.10²³
N mango seeds=2.107 x 10²⁴..
Explain why it is often necessary to start a campfire with many pieces of kindling (small pieces of wood) rather than with a few large logs
Answer:
It is often necessary to start campfire with many pieces of kindling rather than large logs because it is easier to ignite smaller pieces than larger pieces. Imagine wanting to light up a pile of clothes and a small piece of a shirt. Which ignites faster? The piece of a shirt, because it is smaller and more likely to burn very quickly. Additionally, people criss-cross these tiny pieces of wood to enable more surface area and to allow more oxygen to pass through. As you know, oxygen is necessary for a flame to ignite.
HELPPP which one has four energy levels Si, Ge, or Sn???
Answer:
Ge
Explanation:
pretty sure im on high school 12th
If the molecular mass of a substance is 7.304 • 10²³ g, find its molar mass.
Answer:
1.213 g/mol
Explanation:
We are given that the molecular mass is 7.304 × 10²³ g.
From avogadro's number, we know that;
1 mole of a substance = 6.022 × 10²³ molecules
Thus;
Molar mass = molecular mass/avogadro's number = (7.304 × 10²³)/(6.022 × 10²³) = 1.213 g/mol
Which is the function of a cell′s nucleus
Answer:
The cell's nucleus controls the activities of a cell and carries genes that contain information.
what is a second degree burn
Question 8
Which one of the following salts does not contain water of crystallisation?
Answer:
pb
Explanation:
dosn't contain water of crystallization
83.0 g Lithium Cyanide (LiCN)
calculate this to molar mass and moles. Please
Answer:
32.958 g/mol
2.52 moles
Explanation:
Finding the molar mass:
Use the periodic table to determine the masses of each element
6.94+12.011+14.007=32.958 g/mol
Moles:
83 g*1 mol/32.958 g = 2.5183566964 moles
[tex]\\ \sf\longmapsto LiCN[/tex]
[tex]\\ \sf\longmapsto 7u+12u+14u[/tex]
[tex]\\ \sf\longmapsto 21u+12u[/tex]
[tex]\\ \sf\longmapsto 33u[/tex]
[tex]\\ \sf\longmapsto 33g/mol[/tex]
Given mass=83gNo of moles=Given Mass/Molar mass[tex]\\ \sf\longmapsto \dfrac{83}{33}[/tex]
[tex]\\ \sf\longmapsto 2.5mol[/tex]
how can you tell if an substance is an elements
Answer:
A substance that cannot be broken down into chemically simpler components is considered an element
Hope that helps:)
Solid potassium chlorate breaks into potassium chloride and oxygen gas when heated up to high temperature. This is an example of a/an _______ reaction.
Answer:
es correcto bro claro eres un crak
Answer:
Decomposition Reaction
Explanation:
You can determine the type of reaction by writing out a balanced equation.
Solid Potassium Chlorate: KClO3
Potassium Chloride: KCl
Oxygen Gas: O2
Balanced Equation: 2KClO3 -> 2KCl + 3O2
By definition, a decomposition reaction is when a single substance decomposes into two more simpler substances. AB -> A + B
Because the solid potassium chlorate is breaking into two substances, potassium chloride and oxygen gas, it is a decomposition reaction.
Picture a neutral S atom. This neutral atom will have
valence electrons. To reach a more stable configuration, this atom will
(gain, lose) electrons. The charge of the ion that forms will be
ASAP please
Answer:
it will have 6 valence electrons
it will gain electrons
charge will be 2-
Which statement about an object in motion is correct?
Help
how many moles are in 3.0x10^24 molecules of water
Answer:
3.52 x 10^24 molecules x `1mol/6.02 x 10^23 molecules = 5.85 moles of H2O.
Explanation:
reaction type
__HCl + __Mg -> __MgCl2 + __H2
Hi people senko-San is best wifu change my mind
Answer:dude what are you doing here?
Explanation:also i don’t know if I can lol
explain the factor of a skeleton system
Which cell organelle controls all cell activities? Group of answer choices B. Nucleus C. Cytoplasm D. Mitochondria A. Cell Membrane E. Cell Wall
5. Predict which element would have a higher electron affinity: silicon or arsenic. Support your prediction with an explanation.
Answer:
Silicone
Explanation:
According to periodic trends, electron affinity increases as you go right and decreases as you go down. Silicone is above arsenic so I would expect it to have a higher electron affinity.
how did the periodic table get its name?
a. the periodic table got its name from the way the elements are arranged in periods called groups.
b. the periodic table got its name from the way the elements are arranged in rows which are called periods.
c. the periodic table got its name from the way the elements are arranged in rows which are called periodic groups.
d. the periodic table got its name from the way the elements are arranged in rows which are called groups.
Answer:
no te engiendo mi panahellow
Answer:
b
Explanation:
b. the periodic table got its name from the way the elements are arranged in rows which are called periods.
Which phrase describes runoff?
1.underground water that flows into lakes
2.river water that empties into an ocean
3.water from streams that flows into larger rivers
4.water from rain and snow that travels to streams
Please help!
Explanation:
water from rain and snow that travels to streams
Please help!
Water from a rain and snow that travels to streams are examples of run off. These natural processes are part of water cycle and balance the water content in the atmosphere and hydrosphere.
What is water cycle ?Water cycle is a geological phenomenon to balance the water content in the atmosphere, hydrosphere and in the biosphere. The water bodies evaporate by the heat radiated by sun.
The air moisture can be restored to the land through the cooling of the vapor and pour as rain. This best illustrates the interaction between atmosphere and hydrosphere.
Rain, snow, sleet, or hail that reaches a surface stream without ever going below the soil's surface is referred to as surface runoff. It differs from direct runoff, which is runoff that directly reaches surface streams following rainfall or snowmelt. Hence option 4 is correct.
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