Answer:
paper chromatography is an analytical method used to separate colored chemicals or substances.It is primarily used as a teaching tool,having been replaced by other Chromatography methods ,such as thin layer chromatography.
If you shake up different kinds or brands of soft drinks will they all spew you the same amount
Answer:
The different brands of sodas will not spew the same amount when shaken because there are different amounts of sugar in the sodas and that will affect the amount spewing. Pepsi will spew the highest, compared to the other brands of sodas
Explanation:
The amount of fizz that different kinds or brands of soft drinks spew out when shaken up may not be the same.
The fizz that soft drinks produce is due to the carbon dioxide gas that is dissolved in the drink. The amount of fizz that soft drinks produce when shaken up can vary depending on various factors such as the brand of soft drink, the temperature of the drink, and the level of carbonation of the drink. When a soft drink bottle or can is shaken, the carbon dioxide gas gets released from the solution and forms bubbles, which causes the spewing action.
However, the amount of carbon dioxide gas that is dissolved in the drink can vary depending on the brand and the level of carbonation. This means that some soft drinks may produce more fizz than others when shaken up.In summary, the amount of fizz that soft drinks produce when shaken up can vary depending on various factors.
Hence different kinds or brands of soft drinks may not spew you the same amount.
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Tell me whats wrong in this
1. Titanium is a transition metal and gallium is a transition metal.
2. Nitrogen is a nonmetal and oxygen is a nonmetal. Nitrogen is in group 5A (15), and oxygen is in group 6A (16).
3. Lithium is a main group metal and sodium is a main group metal. Lithium is in group 1A (1), and sodium is in group 1A (1).
4. Argon is a nonmetal and bromine is a nonmetal. Argon is in group 8A (18), and bromine is in group 7A (17).
5. Germanium is a metalloid and arsenic is a metalloid. Germanium is in group 4A (14), and arsenic is in group 5A (15).
Answer:
Gallium is NOT a transition metal.
Explanation:
1. Titanium is a Transition metal However Gallium is NOT. Gallium is a main group metal, It belongs to group 3 - Boron Group.
All the remaining statements are correct.
Which of the following best describes the function of vacuoles?
O
Transferring energy throughout all kinds of cells
O
Storing materials in plant cells
Digesting food in animal cells
O
Protecting cells from the environment
They mainly store materials for other cells to use.
A 75 Kg skateboarder is riding downhill, exerting 25 N. What is their acceleration?
Answer:
The answer is 0.33 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
where
m is the mass
f is the force
a is the acceleration
From the question
f = 25 N
m = 75 kg
We have
[tex]a = \frac{25}{75} = \frac{1}{3} \\ = 0.333333333...[/tex]
We have the final answer as
0.33 m/s²Hope this helps you
the atomic number of an element is......
Answer:
the number of protons in the nucleus of an atom.
Explanation:
cause they are the same no matter what.
Limestone has a density of 2.72g/cm3. What is the mass of 24.9 cm3of limestone?
Answer:
density = mass ÷ volume
Explanation:
mass = volume × density
=24.9 cm3 × 2.72 g / cm3
=67.728 g
Express in scientific notation:
780000
Answer:
7.8 x 10^5
Explanation:
So in scientific notation the number has to be less then 10 and greater then 1 so in this case it would be 7.8 and the number of 0 moved 10^x power would be the number which in this case it’s 5 times so 10^5. multiply the two numbers and that’s scientific notation.
DNA is made up of repeating sequences of?
Answer:
Nucleic Acids
Explanation:
DNA, Deoxyribonucleic acid, is made up up nucleic acids. These nucleic acids are:
Adenine
Guanine
Cytosine
Thymine
Adenine binds to Thymine and Cytosine binds to Guanine. They are then "twisted" into a double helix.
Answer:
Explanation:
from two to several thousand base pairs and is estimated to constitute about 30% of the genome. Many of these sequences are localized in centromeres and telomeres, but they are also dispersed throughout the genome.
How much time is required for an object moving 4.5m/s to travel 65 m
Answer:
About 14.45 seconds
Explanation:
If a object is going 4.5m/s and its destination is 65m then you need to divide.
65÷4.5 = 14.444444
due to the constant 4 you need to round 14.444 so it would be 14.45 seconds.
Carbon-14 has a half-life of 5,730 years. How long will it take for 112.5 g of a 120.0-g sample to decay radioactively?
5,730 years
11,460 years
17,190 years
22,920 years
Answer:
22,920 years
Explanation:
Took the quiz on Edge
The time that it will take for 112.5 g of a 120.0-g sample to decay radioactively is about 22,920 years.
What is half life?The term half life is defined as the time taken for only half of the radioactive sample to remain.
The time that it will take for 112.5 g of a 120.0-g sample to decay radioactively is about 22,920 years.
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A ballon has a volume of 5.6L at 25C and it is placed into liquid nitrogen at a temp of -78c. what is the volume of the ballon
Answer:
3.7L
Explanation:
Given parameters:
Initial volume = 5.6L
Initial temperature = 25°C = 273 + 25 = 298K
Final temperature = -78°C = 273 + (-78) = 195K
Unknown:
New volume of the balloon = ?
Solution:
We are going to assume that the pressure is constant and then we apply the charles's law;
"the volume of fixed mass of a gas varies directly as its absolute temperature if its pressure is constant"
mathematically;
[tex]\frac{V_{1} }{T_{1} }[/tex] = [tex]\frac{V_{2} }{T_{2} }[/tex]
Where V and T are temperature
1 and 2 are initial and final states
Insert the parameters and solve;
[tex]\frac{5.6}{298}[/tex] = [tex]\frac{V_{2} }{195}[/tex]
298V₂ = 1092
V₂ = 3.7L
“Zn” is a...
Chemicals Formula
Symbol
Name
Explanation:
Zn is a symbol
its name is zinc
In a second atomic absorption experiment, a student prepared a blank solution and measured itsabsorbance, in absorbance units (AU), three times. The measured values were 0.0044 AU, 0.0079 AUand 0.0062 AU.
Required:
a. Calculate the mean of the blank.
b. Calculate the precision of the blank.
c. Calculate the accuracy of the measurement if the true value of the blank is 0.0030 AU.
Answer:
0.0062AU 0.00082.106.7% errorExplanation:
a.) Average or mean value of readings, [tex]x_{o}[/tex] = (0.0044 + 0.0079 + 0.0062) / 3
= [tex]\frac{0.0185}{3}[/tex] = 0.0062 AU
b.) The accuracy of the readings is determined by taking determining the standard deviation (SD) of the readings:
SD = ∑ [tex]\sqrt{x- x_{o}}[/tex]/n
[tex](0.0062 - 0.0044)^{2}[/tex] = 0.0000032
[tex](0.0062 - 0.0079)^{2}[/tex] = 0.00000289
[tex](0.0062 - 0.0062)^{2}[/tex] = 0
SD = [tex]\frac{\sqrt{0.0000032 + 0.00000289 + 0} }{3}[/tex] = 0.00082.
c.) The % accuracy is the distance between the average value and true value
= [tex]\frac{0.0062-0.0030}{0.0030} *100[/tex] = 106.7% error.
What is the chemical symbol for 1s^22s^22p^6
Answer:
The chemical symbol of given electronic configuration is Ne.
Explanation:
First of all we will calculate the total number of electron from this electronic configuration:
1s² 2s² 2p⁶ = 2+2+6 = 10
we know that the number of electron of an atom shows its atomic number. The total number of electron in given electronic configuration are 10.
Now from periodic table we got to know that neon has atomic number of 10.
Thus the given electronic configuration is of neon atom.
Neon is belongs to noble gas family.
All noble gases have complete octet.
These are inert gases.
1 point
A 2.00 kg cart on a frictionless track is pulled by force of 3.00 N. What is
the acceleration of the cart?
1.5 m/s/s
O 3 m/s/s
6 m/s/s
.66 m/s/s
Answer:
The answer is 1.5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]acceleration = \frac{force}{mass} \\ [/tex]
From the question
force = 3 N
mass = 2 kg
The acceleration is
[tex]acceleration = \frac{3}{2} \\ [/tex]
We have the final answer as
1.5 m/s²Hope this helps you
If a package of nuts weighs 41.3 what is the massif package express in milligram
Answer:
1170855 mg
Explanation:
whats the balanced chemical equation for Solid potassium iodide decomposes into solid potassium and iodine gas
Answer:
Solid potassium iodide decomposes into solid potassium and iodide gas.
Explanation:
The answer given has a subscript "2" on the iodine at the start of the equation. Why is the 2 there as a subscript?
HELP!! I NEED AN ANSWER!!
Why does an iron gate have the same properties as an iron frying pan?
O both are black
O both are non-mental
O both are magnetic
O both are made of the same type of atoms.
what is the affect of neutrons on atoms
Answer:
It's better to explain it.
Explanation:
Neutrons do not affect the electron configuration, but the sum of atomic number and the number of neutrons, or neutron number, is the mass of the nucleus. You know that neutrons are found in the nucleus of an atom. Under normal conditions, protons and neutrons stick together in the nucleus. During radioactive decay, they may be knocked out of there. Neutron numbers are able to change the mass of atoms, because they weigh about as much as a proton and electron together. if your asking What is the role of a neutron in an atom? then, Neutrons are very important in providing stability for an atom. Some atoms don't "need" neutrons - The hydrogen atom does not have any neutrons. However, as the atomic number ( # of protons ) increases, the number of neutrons increases as well.
Protons don't like each other. Naturally, 'positive charges repel', so it wouldn't be possible to have more than one proton in the nucleus. Here's where the neutron comes in.
Hope this helps. :)
C10H20 is an organic compound. Calculate its molar mass to 2 decimal spaces.
Answer:
140.3 g/mol
Explanation:
Step 1: Define
Molar Mass C - 12.01 g/mol
Molar Mass H - 1.01 g/mol
Step 2: Multiply values
10(Molar Mass C) + 20(Molar Mass H)
10(12.01 g/mol) + 20(1.01 g/mol)
120.1 g/mol + 20.2 g/mol
140.3 g/mol
which statement is an example of an observation a scientist would make to clarify a rock.
A, a rock is larger than other rock.
b. A rock was found in a stream.
c, A rock is formed from molten lava.
b. A rock cracks in half after a rainstorm.
Answer: A
Explanation: Geologists classify rocks by looking at their chemical and mineralogical composition then at the the size and shape of their component minerals then at any texture.
i need help with question 1 please
Answer:86
Explanation: to find atomic mass you take the number of protons and the number of neutrons. therefore you take the 40 protons and the 46 neutrons to find the mass. :)
Answer:
86
Explanation:
To find the answer i added the proton and neuron
Using the following bond energies:
Bond Bond Energy (kJ/mol)
C ≡ C 839
C-H 413
O=O 495
C=O 799
O-H 467
Estimate the heat of combustion for one mole of acetylene
C2H2(g)+5/2O2(g)→2CO2(g)+H2O(g)
a. 1228 kJ
b. -1228 kJ
c. -447 kJ
d. +447 kJ
e. +365 kJ
Answer:
The answer is "Option b".
Explanation:
Given equation and value:
[tex]\Rightarrow C_2H_2 \ (g)+ \frac{5}{2}O_2 \ (g) \longrightarrow 2CO_2\ (g)+H_2O\ (g)[/tex]
[tex]\left\begin{array}{ccc}C \equiv C&839\\C-H &413\\O=O &495\\ C=O &799\\ O-H &467 \end{array}\right \\\\[/tex]
calculating equation value:
[tex]\Rightarrow 839 + 2(413) +\frac{5}{2} (495) \longrightarrow 2(2)799+2 \times 467 +E[/tex]
[tex]\Rightarrow 839 + 826 +1237.5 = 3196+934 +E\\\\\Rightarrow 2902.5 =4130 +E\\\\\Rightarrow 2902 = 4130 +E\\\\\Rightarrow 2902 - 4130 +E\\\\\Rightarrow E = -1228 \ KJ \\\\[/tex]
The heat(enthalpy) of combustion of acetylene = -1228 kJ
The heat of combustion refers to the amount of heat released when 1 mole of a substance is burned.
The chemical reaction is given in the equation;
[tex]\mathbf{C_2H_{2(g)} + \dfrac{5}{2}O_{2(g)} \to 2CO_{2(g)}+H_2O_{(g)}}[/tex]The bond energy of the reactant is:
[tex]\mathbf{=( 1 \times C \equiv C) + ( \dfrac{5}{2} O =O)+(2 \times (C-H))}[/tex]Following the bond energies given in the question, we have:
= ( 1 × 839) +(5/2 × 495) +(2 × 413)
= 2902.5 kJ
The bond energy of the product is:
[tex]\mathbf{4 \times C=O ) + (2 \times O-H)}[/tex]= (4× 799) +(2 × 467)
= (3196 + 934) kJ
= 4130 kJ
The heat(enthalpy) of combustion of acetylene = bond energy of reactant - bond energy of the product.
The heat(enthalpy) of combustion of acetylene = 2902.5 kJ - 4130 kJ
The heat(enthalpy) of combustion of acetylene = -1227.5 kJ
≅ -1228 kJ
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A cube of ice melts in a breaker to form 10g of water
Answer:
10 g The change from ice to water is a phase change for the water. A phase change does not change the mass of the water. So if you end up with 10 g of water, and you originally started with ice, then that means you had to start with 10 g of ice. Therefore the best estimate of the mass of the ice cube is 10 g.
Explanation:
You have 500 g of water in a bottle. How many molecules of water do you have?
Answer:
167.28×10^23
Explanation:
500 ml of water weighs 500 gm.
Molecular weight of water =18 gm
So, number of moles in 500 gm of water=500/18=27.78
Number of molecules= number of moles × Avogadro's number=27.78×6.022×10^23=167.28×10^23
So, there are 167.28×10^23 molecules in 500 ml of water
Aluminum has a density of 2.70g/cm what is the volume occupied by a block of aluminum which weights 4.32kg
Answer:
Explanation:
0.000625 cm3
0.625 cm3
1.60 cm3
In the PhET simulation, make sure that the checkbox Stable/Unstable in the bottom right is checked. Using the PhET simulation as a reference, determine whether the following combinations of protons and neutrons form stable or unstable nuclei by adding protons and neutrons to the nucleus. Unstable nuclei will shake. If the Stable/Unstable checkbox in the lower right is also checked, the nuclei will be labeled Stable or Unstable. Sort the following combinations of protons and neutrons according to whether or not they form stable or unstable nuclei.
a. 4 protons and 5 neutrons
b. 7 protons and 7 neutrons
c. 2 protons and 3 neutrons
d. 3 protons and 0 neutrons
e. 6 protons and 5 neutrons
f. 9 protons and 9 neutrons
g. 8 protons and 7 neutrons
h. 1 proton and 0 neutrons
Answer:
kindly check the EXPLANATION SECTION
Explanation:
In order to be able to answer this question one has to consider the neutron proton ratio. Considering this ratio will allow us to determine the stability of a nuclei. The most important rule that helps us in determination of stability is that when the Neutron- Proton ratio of any nuclei ranges from to 1 to 1.5, then we say the nuclei is STABLE.
Also, we need to understand that when the Neutron- Proton ratio is LESS THAN 1 or GREATER THYAN 1.5, then we say the nuclei is UNSTABLE.
So, let us check which is stable and which is unstable:
a. 4 protons and 5 neutrons = Neutron- proton ratio = N/P = 5/4= stable.
b. 7 protons and 7 neutrons = Neutron- proton ratio = N/P = 7/7= 1 = stable.
c. 2 protons and 3 neutrons = Neutron- proton ratio = N/P = 3/5 =0.6 =unstable.
d. 3 protons and 0 neutrons = Neutron- proton ratio = N/P = 0/3= 0= unstable.
e. 6 protons and 5 neutrons = Neutron- proton ratio = N/P = 5/6= 0.83 = unstable.
f. 9 protons and 9 neutrons = Neutron- proton ratio = N/P = 9/9 = 1 = stable.
g. 8 protons and 7 neutrons = Neutron- proton ratio = N/P = 7/8 =0.875 = unstable.
h. 1 proton and 0 neutrons = Neutron- proton ratio = N/P = 0/1 =0 = unstable
A nucleus is unstable if the neutron - proton ratio is less than 1 or greater than 1.5.
The stability of a nucleus depends on the neutron - proton ratio. We must not that an atom is unstable if the neutron - proton ratio is less than 1 or greater than 1.5. Let us now examine each case.
4 protons and 5 neutrons - N/P ratio = 1.25 - stable 7 protons and 7 neutrons - N/P ratio = 1 - stable2 protons and 3 neutrons - N/P ratio = 1.5 - stable6 protons and 5 neutrons - N/P ratio = 0.83 - unstable 9 protons and 9 neutrons - N/P ratio = 1 - stable8 protons and 7 neutrons - N/P ratio = 0.88 - unstable1 proton and 0 neutrons - N/P ratio = 0 - unstableLearn more about stability of nuclei: https://brainly.com/question/494665
WOULD YOU CONSIDER WATER AND OZONE TO BE MOLECULES ?
Answer:
yes
Explanation:
Water contains molecular bonds and because it is made from more than one element and they are oxygen and hydrogen.
ozone would be considered a molecule because it has three oxygen atoms formed together and is 21% of the gases found on earth
The mass of a 5 mL sample of ethanol is 15.2 grams, what is the density?
Work Shown:
density = mass/volume
d = (15.2 grams)/(5 mL)
d = (15.2/5) grams per mL
d = 3.04 grams per mL
This is the same as writing 3.04 g/mL
how many elements are in Li2SO4?how many elements are in li2s 04 how many elements are in li2s 04
Answer:
3
Explanation:
the three elements involved in this compound are Li, S, O.
lithium, sulfur, and oxygen. Which create the ionic compound, "Lithium Sulfate."
7 atoms total, since there are two lithium, four oxygen, and one sulfate atom. this is a white inorganic salt.
There are three different types of elements in LiSO₄ which are lithium (Li), sulfur (S), and oxygen (O).
What is an element?
An element is a pure substance made of only one kind of atom which all have the same number of protons in their nuclei.
The chemical element was first presented by Robert Boyle who defined it as "incapable of decomposition”. Boyle’s this definition lies admirably close to present-day theory.
When different kinds of elements undergo particular chemical reactions then atoms are rearranged into new compounds connected together by chemical bonds.
All other naturally occurring elements occur on the Earth as compounds or mixtures. Air is a mixture of the elements nitrogen (N₂), oxygen (O), and argon (Ar), though it does contain carbon dioxide and water.
Given compound, lithium sulfate is formed of LiSO₄ has elements lithium, sulfur, and oxygen.
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