how many total elements are in marble?
Answers
Answer:There are total 118 elements in world as about marbale
Explanation:
Related Questions
Create a creature the reproduces asexually
Answers
Answer:
Hydra bud
Explanation:
this plant reproduces asexually
Please help me with this question please!!!
Look at the picture provided and answer the question
>>Select one only.
Q:An aromatic hydrocarbon is represented by which structural formula?
>>Choose one answer from the picture below that answers the question above
A
B
C
D
Answers
Answer:
A
Explanation:
I looked up aromatic hydrocarbon and this one looks like a replica of benzene
3. The air today is approximately one-fifth
oxygen. Calculate the approximate volume of
oxygen in 200cm3 of air.
Answers
Answer: 40cm^3
Explanation:
Since the The air today is approximately one-fifth oxygen, the approximate volume of oxygen in 200cm3 of air would be:
= 1/5 × 200
= 40cm
The answer is 40cm^3
How many grams are in 2.0 moles of iron(III) carbonate?
Answers
Explanation:
1 mole is equal to 1 moles Iron(III) or 832.29538 grams, so 2 moles Iron(III) = 1664.59076 grams
What is “rounding down”?
Answers
Answer:
if the number is 4 or less than you can round down but if it's 5 or more round up
Explanation:
It makes the number simpler by making it smaller. Ex. 34 would round down to 30, 43 would round down to 40
How does the electron arrangement change moving vertically down a group?
Answers
Answer:
Electrons arrangement change is almost constant down the group, hence nuclear charge is almost constant.
But the energy levels on which electrons are arranged increase down the group, hence shielding or screening effect increases.
6
Which subatomic particle can be found revolving around the nucleus?
proton
neutron
electron
Answers
Answer : The correct option is, electron.
Explanation :
As we know that,
An atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.
The protons and the neutrons are located inside the nucleus or the center of the nucleus where the mass of the an atom is concentrated.
The electrons are located around the nucleus.
The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.
According to the question, the electron subatomic particle found revolving around the nucleus.
Hence, the correct option is electron.
The creation of carbon monoxide is an effect. What is one cause?
A. the regrouping of the atoms in table salt
B.the burning of fossil fuels
C.cleaning swimming pools
D.operating a stove
Answers
Answer:
Your answer is going to be B. the burning of fossil fuels
Explanation:
This is because carbon monoxide is extremely toxic for us humans. An example of this could be pollution. Hope this helps! :)
true or false; some organisms are not affected by any abiotic factors
Answers
Answer:
True
Explanation:
Answer:
False
Explanation:
What is the mass of 3.01 x 1023 atoms of FeO?
Answers
Which term refers to the simplest form of matter that cannot be broken down chemically?
A.Element
B.compound
C.Mixture
D.solution
Answers
Answer:
I believe the answer is A, an Element.
Explanation:
It's a substance that cannot be broken down into simpler substances. If I'm wrong, let me know!
Question 10
Which of the following is a sign that you might be in an extremely unsafe situation?
A) you see frayed electrical cords on the machine you are asked to use
B) other workers are getting burned on the fryer that you are supposed to use
C) you are shown a forklift truck - something you have never operated before -
and told to move a heavy load of materials across the warehouse floor
D) only a) and c)
E) all of a), b), and c)
Answers
Answer:
Here it would be A,B and C because all the examples are violating safety precautions. They are all examples of un safe signs.
Hope this helps
Explanation:
1.05 Lab pls help(Measuring Physical Properties Lab Report)
Answers
Answer:
1.05 hopefully this helps
Does anybody know what the dependent and independent variables are?
How do we know that caramelizing sugar is a chemical change?
It involves dissolving sugar in water.
It changes the state of sugar from a solid to a liquid.
It separates sugar fromn a sugar solution.
It changes the sugar's color.
Answers
Answer:
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Explanation:
caramel is the product of the sugar and hot water
Answer:
D It changes the sugars color
Explanation:
Because the change of color is a chemical change.
Have a splendid day! I hope you like the answer given.
____ Al(NO3)3 + ____ FeCl2 --> _____ Fe(NO3)2 + ______AlCl3
~
how to fix/ balance this chemical reaction?
Answers
The balanced equation
2Al(NO₃)₃ + 3FeCl₂ ⇒ 3Fe(NO₃)₂ + 2AlCl₃
Further explanationGiven
Reaction
Al(NO₃)₃ + FeCl₂ --> Fe(NO₃)₂ + AlCl₃
Required
Balanced equation
Solution
Give a coefficient
aAl(NO₃)₃ + bFeCl₂ --> Fe(NO₃)₂ + cAlCl₃
Make an equation
Fe, left=b, right=1⇒b=1
N, left=3a, right=2⇒3a=2⇒a=2/3
Cl, left=2b, right=3c⇒2b=3c⇒2.1=3c⇒c=2/3
The equation becomes :
2/3Al(NO₃)₃ + FeCl₂ --> Fe(NO₃)₂ + 2/3AlCl₃ x3
2Al(NO₃)₃ + 3FeCl₂ --> 3Fe(NO₃)₂ + 2AlCl₃
What is period? A group?
Answers
please help! 35 points for a valid answer!
how is the potential (voltage) of a redox reaction determined using the reduction potential chart calculate the voltage for the equation in 3(a)
Answers
Answer:
Oxidation half reaction is written as follows when using using reduction potential chart
example when using copper it is written as follows
CU2+ +2e- --> c(s) +0.34v
oxidasation is the loos of electron hence copper oxidation potential is as follows
cu (s) --> CU2+ +2e -0.34v
Explanation:
Answer:
The potential difference is caused by the ability of electrons to flow from one half cell to the other. Electrons are able to move between electrodes because the chemical reaction is a redox reaction. ... The cell potential (Ecell) is measured in voltage (V), which allows us to give a certain value to the cell potential.
Explanation:
What are the three properties of waves?
Answers
Answer: amplitude, wavelength, and frequency.
Explanation:
Mole Conversions
What is the mass in grams of
0.625 mol Ba(NO3)2?(please show work)
Answers
Answer:
Explanation:
Using the formula as follows: mole = mass/molar mass
Molar mass of Ba(NO3)2
= 137 + (14 + 48)2
= 137 + 124
= 261g/mol
Mole = mass ÷ molar mass
0.625 mol = mass/261g/mol
mass = 0.625 × 261
mass = 163g
hi can someone pls help me it’s important i’m studying for my finals
Answers
Answer:
i think the answer is D)
but u should ask the another person too:)
What is the relationship between an object's mass and its ability to pick up speed, or accelerate?
Answers
Answer:
It is momentum
Since momentum is proportional to the product of mass and velocity
Answer:
The greater the object's mass, the longer it takes to pick up speed or accelerate. There is an inverse relationship between mass and acceleration/picking up speed.
Explanation:
11. Describe a procedure you would use to separate a mixture of iron filings, water, and clay. Be clear
about what would happen at each step.
Answers
Answer:
Filtration is commonly the mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass.
Explanation:
hopefully this helps
PLEASE HELP WITH #3 I WILL GIVE BRAINLEIST!
Answers
Answer:
i thunk venus may be right or wrong tel7
Answer:
saturn:85 minutes
venus: 4.25 minutes
Analyze. This reaction releases energy as heat. Explain whether the reaction is exothermic or endothermic and whether it obeys the laws of Conservation or energy
Answers
Answer:
See explanation
Explanation:
If heat is given out in a reaction, then that reaction is exothermic. If heat is absorbed in a reaction, then that reaction is endothermic.
Hence, if heat is given out, the reaction is exothermic. The heat given out does work on the surrounding thus the laws of conservation of energy are obeyed.
Answer:
The reaction is exothermic.
Explanation:
I took the test
1. Al +
LINO2 + _______ + _________
Answers
answer; the last two is me and u :
what percent of the sun's energy is used by the living organism on earth
a. 1%
b. 10%
c. 20%
d. 35%
e. 50%
Answers
Hope I’m right tho
Does SiO2 also equal Si2O4?
(silicon atom 1 oxygen atom 2 = silicon atom 2 oxygen atom 4?)
Answers
Answer:
7
Explanation:
that is the anwer of the question
What is the percent of Nitrogen in NH3?
Answers
Answer:
82.244%
Explanation:
The mass percent is an important method which is used to calculate the concentration of a solution. The mass percent of nitrogen in NH₃ is 82.2%.
What is mass percentage?The mass percentage of a particular component in a compound can be defined as the ratio of the mass of the particular component to the total mass of the compound.
The equation which is used to calculate the mass percentage is:
Mass percentage = Mass of the component / Total mass of the compound × 100
or
The mass percentage is also calculated as:
% Mass = Mass fraction × 100
Here the mass of 'N' = 14.00 g
The molar mass of NH₃ = 17.031 g/mol
% Mass of 'N' = 14.00 / 17.031 = 0.82
0.82 × 100 = 82.2 %
Thus the mass percentage of nitrogen is 82.2 %.
To know more about mass percentage, visit;
https://brainly.com/question/27429978
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An 18.0 g piece of an unidentified metal was heated from 21.5 °C to 89.0 °C. If 789.75 J of heat energy was absorbed by the metal in the heating process, what was the identity
of the metal?
Answers
Answer: The metal is Calcium.
Explanation:
To calculate the specific heat of substance during the reaction.
[tex]q=m\times c\times \Delta T[/tex]
where,
q = heat absorbed = 789.75 J
c = specific heat of metal = ?
m = mass of substance = 18.0 g
[tex]\Delta T_f[/tex] = final temperature - initial temperature = [tex](89.0-21.5)^0C=67.5^0C[/tex]
Now put all the given values in the above formula, we get:
[tex]789.75J=18.0g\times c\times 67.5^0C[/tex]
[tex]c=0.65J/g^0C[/tex]
As specific heat is characteristic of each metal and thus the metal is calcium which has specific heat of [tex]0.65J/g^0C[/tex]
I don't really understand this worksheet question.
Answers
CROSS MULTIPLY.
2x=2,400.
divide by 2.
x=1,200.
you take the GIVEN MASS of an element, and you put it on top, the coefficient is what it’s over. i believe this is right