Answer:
option B is correct
Explanation:
Jocelyn and her friends put some raisins, hazelnuts,
almonds, and peanuts in a bowl to make a snack for their
hiking trip. What does this snack represent?
A. a solution
B. a new element
C. a new compound
D. a mixture
plspslsspslpsl help its revision for exam and i need it quick brainliest for the right answer :D
Answer: D. a mixture
Explanation: When you mix different types of nuts or snacks together including raisins, hazelnuts, almonds, and peanuts to make some kind of trail mix, then you are creating a mixture, specifically a heterogeneous mixture.
how do ions impact your life
Answer:
Increasing your concentration of negative ions is a very important way to improve your health for a variety of reasons. They work to increase serotonin levels in your body, which improves mood and balances your mental health, helping combat depression and anxiety.
Explanation:
In a titration of a solution of unknown concentration of calcium hydroxide against hydrochloric acid (concentration 0.9mol/dm3), 25cm3 of calcium hydroxide was neutralised by 22.5cm3 of hydrochloric acid. Calculate the concentration of the calcium hydroxide solution.
Ca(OH)2 + 2HCl -> CaCl2 + 2H2O
Can someone please help me out?
Answer:
c
Explanation:
if the percentage yield of a reaction is 85%
Answer: % yield
=
actual yield
theoretical yield
⋅
100
%
So, let's say you want to do an experiment in the lab. You want to measure how much water is produced when 12.0 g of glucose (
C
6
H
12
O
6
) is burned with enough oxygen.
C
6
H
12
O
6
+
6
O
2
→
6
C
O
2
+
6
H
2
O
Since you have a
1
:
6
mole ratio between glucose and water, you can determine how much water you would get by
12.0
g glucose
⋅
1 mole glucose
180.0 g
⋅
6 moles of water
1 mole glucose
⋅
18.0 g
1 mole water
=
7.20
g
This represents your theoretical yield. If the percent yield is 100%, the actual yield will be equal to the theoretical yield. However, after you do the experiment you discover that only 6.50 g of water were produced.
Since less than what was calculated was actually produced, it means that the reaction's percent yield must be smaller than 100%. This is confirmed by
% yield
=
6.50 g
7.20 g
⋅
100
%
=
90.3
%
You can backtrack from here and find out how much glucose reacted
65.0 g of water
⋅
1 mole
18.0 g
⋅
1 mole glucose
6 moles water
⋅
180.0 g
1 mole glucose
=
10.8
g
Explanation:
Answer:no answer,
Explanation: but if the other dude see this can you re word Wht u said it’s hard to make sense of it
How to find valency?
Answer:
ork out which of the displacement (S), initial velocity (U), acceleration (A) and time (T) you have to solve for final velocity (V).
If you have U, A and T, use V = U + AT.
If you have S, U and T, use V = 2(S/T) - U.
If you have S, U and A, use V = SQRT(U2 + 2AS)
What determines which element an atom is ?
The number of neutrons
The number of electrons
The size of the atom
The number of protons
The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.
hope this helps, if not, your free to give me 1 star
When a cylinder of helium gas is left standing in the sun, the temperature of the helium reaches 31.5C. The cylinder has a volume of 60.0 L and contains 0.020 mol of helium. What is the pressure in atmospheres inside the cylinder? What is the value for R for this problem?
Answer:
The pressure inside the cylinder is [tex]8.327\times 10^{-3}[/tex] atmospheres.
The value for R for this problem is 0.082 atmosphere-liters per mol-Kelvin.
Explanation:
Let suppose that helium gas inside the cylinder behaves as an ideal gas, the equation of state for the ideal gas is:
[tex]P\cdot V = n\cdot R_{u}\cdot T[/tex] (1)
Where:
[tex]P[/tex] - Pressure, measured in atmospheres.
[tex]V[/tex] - Volume, measured in liters.
[tex]n[/tex] - Molar quantity, measured in moles.
[tex]T[/tex] - Temperature, measured in Kelvin.
[tex]R_{u}[/tex] - Ideal gas, measured in atmosphere-liters per mole-Kelvin.
If we know that [tex]V = 60\,L[/tex], [tex]n = 0.020\,mol[/tex], [tex]T = 304.65\,K[/tex] and [tex]R_{u} = 0.082\,\frac{atm\cdot L}{mol\cdot K}[/tex], then the pressured inside the cylinder is:
[tex]P = \frac{n\cdot R_{u}\cdot T}{V}[/tex]
[tex]P = \frac{(0.020\,mol)\cdot \left(0.082\,\frac{atm\cdot L}{mol\cdot K}\right)\cdot (304.65\,K) }{60\,L}[/tex]
[tex]P = 8.327\times 10^{-3}\,atm[/tex]
The pressure inside the cylinder is [tex]8.327\times 10^{-3}[/tex] atmospheres.
The value for R for this problem is 0.082 atmosphere-liters per mol-Kelvin.
In a thermonuclear device, the pressure of 0.5 liters of gas within the bomb casing reaches 4.0 x 10^6 atm. When the bomb casing is destroyed by the explosion, the gas is released into the atmosphere where it reaches a pressure of 1.00 atm. What is the volume of the radioactive gas after the explosion?
please help for the love of god
Answer:
Great Rapids White Water Rafting Company rents rafts for $125 per hour. Explain why the point, (0,0) and (1, 125) are on the graph of the relationship and what these points mean in the context of the problem. * 100 points
Explanation:
What if you mix green with blue?
Answer:
Ooo points, You get teal, turquoise, and cyan :)
if compose means to put together then decompose means to what?
Answer:
Break apart
Explanation:
Decompose: to break down or cause to break down into component elements or simpler constituents.
What type of battery is your flashlight battery?
voltaic piles
dry cell batteries
lead-acid batteries
wet cell batteries
A "cell" might be a better name for the torch battery. A "battery" is a collection of connected cells. Another example of an electric cell is a lemon with two strips of different metals (for instance, zinc & copper) inserted into it. The correct option is B.
A primary cell in a dry-cell battery is one that cannot be recycled. Each dry-cell battery has a cathode and an anode for operation. Remote controls, clocks, and calculators are a few examples of modern-day items that employ dry-cell batteries.
Alkaline and lithium batteries are the two most typical types found in flashlights. A "dry" cell used in a torch has a finite lifespan.
Thus the correct option is B.
To know more about flashlight batteries, visit;
https://brainly.com/question/20481109
#SPJ6
which has less electron affinity? francium, strontium, silicon, or fluorine
describe a chemical test for water. Give the test and the result
Answer:
Pure copper(II) sulfate is white. It is also known as anhydrous copper(II) sulfate because it has no water in it.
When water is present in a sample of copper(II) sulfate it turns blue. It is still a dry solid, because the individual water molecules are trapped within the ionic lattice surrounding the copper(II) ions. Solutions of copper(II) sulfate are also blue.
This colour change can be used to detect the presence of water (or water vapour).
Aqueous solutions of ammonium sulfide and potassium hydroxide are mixed.
Precipitate:
Chemical Equation:
Complete Ionic Equation:
Net Ionic Equation:
Answer:
Chemical Equation: (NH4)2S(aq) + 2KOH(aq) -> K2S(aq) + 2NH4OH(s)
Complete Ionic Equation: 2NH4^+(aq) + S^2-(aq) + 2K^+(aq) 2OH^-(aq) -> 2K^+(aq) + S^2- (aq) + 2NH4OH(s) 2NH4^+(aq) + OH^-(aq) -> NH4OH(s)
Explanation:
Question 3 (10 points)
James is trying to calculate the wavelength of a wave. The frequency of the wave is 10 Hz and the speed of the wave is 50 m/s. What is the
wavelength? Show your work.
M
Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.
. One mole of N2O4 contains ___________.
Can someone help me please?
Answer:
I did this already
................
Which of the following is an example of a chemical change? *
A Nitrogen and oxygen mix to form air
Salt dissolves in a glass of water
Hydrogen and oxygen to form water
a solid changes to a liquid
Answer:
hydrogen and oxygen to form water
i need help with gas law problems
Which element is oxidized in the reaction below?
2Na+ Br2 → 2NaBr
Answer:
Bromine
Explanation:
Br2 is an oxidizing agent, Na is a reducing agent.
(PLSSS HEELP)Which landform is created by wind?
Delta
Desert gravel
Horns
Oxbow lake
How to know when a line spectrum is produced.
A line spectrum is produced when the electron moves from one energy level ___. Fill in the blank PLEASE HELP I WILL GIVE BRAINLEST AND GIVE 5 STAR FOR FIRST RIGHT ANSWER
Answer:
A line spectrum is produced when the electron moves from one energy level to a lower energy level.
Answer:
Explanation:
...from one energy level to a lower energy level
1. Explain redshift?
2. What is the Big Bang Theory? Explain why redshift is evidence for this theory.
GIVING BRAINLEST TO WHOEVER HAS THE RIGHT ANSWER! Plz and thx
Food and fossil fuels are considered to be sources of________ energy
1. Mechanical
2.Light
3.Nuclear
4. Chemical
Answer:
Nuclear energy
I'm not sure ok.. Better ask some adult for making sure.
What happens to the temperature and density of the material between points B and C?
Answer:
Temperature decreases and density increases
Explanation:
Let us remember that density of a material increases as the temperature of the material decreases. So the cooler a material becomes, the denser it becomes also.
Between points B and C, the material rapidly cools down and the temperature decreases accordingly. This ultimately results in an increase in density since cooler materials are denser than hot materials.
Which of the following would be a clue that rock is igneous?
A.It has crystals.
B.It has a complete fossil in it.
C.It has bands.
D.It is very soft.
Answer:
A is the answer to your question
They usually have crystals since they are formed from lava
The type of response when a plant moves away from the stimulus
Answer:
A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism. Plants also exhibit phototropism, or growing toward a light source. This response is controlled by a plant growth hormone called auxin.
Explanation:
In what way would one dozen elephants and one dozen doughnuts be different?
the word dozen and the number 12 that makes a dozen
what did you learn in chemistry?