Answers
Answer:
is this a worksheet or something
Explanation:
Related Questions
A compound is 75.46% Carbon, 4.43% hydrogen and 20.10% Oxygen by mass. it has a molecular weight of 318.31g/mol. what is the molecular formula of the compound?
Answers
Answer:
No.of moles of C is , n = mass/molar mass = 75.46 g / 12 (g/mol) = 6.3 moles No.of moles of H is , n' = mass/molar mass = 4.43 g / 1.0(g/mol) = 4.43 moles No.of moles of O is , n'' = mass/molar mass = 20.10 g / 16(g/mol) =1.25 moles Ratio to the no.of moles of C,H& O is 6.3 : 4.43 : 1.25 In the simple integer ratio is ( 6.3/1.25) : ( 4.43/1.25) : (1.25/1.25) 5.04 :3.5 : 1
Explanation:
We have that the Molecular Formula is
[tex]C_{20}H_14O_4[/tex]
From the Question we are told that
75.46% Carbon
4.43% hydrogen
20.10% Oxygen
molecular weight of [tex]318.31g/mol.[/tex]
Generally
Moles of Hydrogen
[tex]M_c=\frac{75.46}{12}\\\\M_C=6.28\\\\M_C=\frac{6.28}{1.256}\\\\M_C=5[/tex]
[tex]M_C=\frac{4.43}{1}\\\\M_C=4.43\\\\M_C=4.43/1.256\\\\M_C=3.5[/tex]
[tex]M_c=\frac{20.10}{16}\\\\M_C=1.256/1.256\\\\M_C=1[/tex]
Therefore
Empirical Formula
[tex]C_{10}H_7O_2[/tex]
Where
[tex]n=\frac{318.31g}{159}[/tex]
n=2
Molecular Formula
[tex]C_{20}H_14O_4[/tex]
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What changes are happening to the particles as it changes state from a liquid to a gas?
(There may be more than one correct answer)
A.The particles will disappear
B. There is more kinetic energy
C. There is less kinetic energy
D. The particles are filling the entire space of the room
Answers
Imagine that you helped to discover a new element; A=302;Z=119. How many protons, electrons, and neutrons are in each atom it this element?
Answers
Explanation:
Given that,
Mass number, A = 302
Atomic number, Z = 119
We know that, atomic number = no of protons
Protons = 119
Mass no. = No. of neutrons + No. of protons
302 = No. of neutrons + 119
No. of neutrons = 302 - 119
= 183
No. of electrons = No. of protons
= 119
How many grams of CO2 gas are produced if 48
grams of CH4 gas are consumed?
Answers
Answer:
CH4 +2 O2 — CO2 +2 H2O
Now we see that for 1 mol i.e. 16 grams of methane results in 1 mol of CO2 or 44 grams of CO2.
That means for 3 moles of methane , we will obtain 3 moles of CO2 OR for 48 (3*16) grams of CO2 , we will obtain (44*3) 132 grams of CO2 .That's it….
Explanation:
hey .dude hope the answer was helpful ....
A 2.500g sample of compound containing only Carbon and Hydrogen is found containing 2.002g of Carbon. Determine the empirical formula of the compound.
Answers
The empirical formula : CH₃
Further explanationGiven
2.5 g sample
2.002 g Carbon
Required
The empirical formula
Solution
Mass of Hydrogen :
= 2.5 - 2.002
= 0.498
Mol ratio C : H :
C : 2.002/12 = 0.167
H : 0.498/1 = 0.498
Divide by 0.167 :
C : H = 1 : 3
The empirical formula of the given sample containing only Carbon and Hydrogen is CH₃.
What is empirical formula?Empirical formula of any compound tells about the relative proportion of the constituents of that compound.
Given mass of compound = 2.5 g
Given mass of carbon = 2.002G
Mass of hydrogen = 2.5 - 2.002 = 0.498
Molar ration will be find by dividing the given mass by molar mass as:
C:H
2.002/12 : 0.498/1
0.167 : 0.498
Now we divide the upper quantities with the least obtained value as:
C:H
0.167/0.167 : 0.498/0.167
1 : 3
Hence, the empirical formula is CH₃.
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need help fast !!!!!!!
Answers
Answer:
Brittle
Explanation:
because thas for non metals
I kinda need help with this
Answers
is diamond an element, a compound, or a mixture?
Answers
Answer: A diamond is a heterogeneous mixture. But it could be considered a element because it is made out of carbon which is an element.
Explanation:
Describe in your own words the structure of solid sodium chloride, and explain why its formula is NaCl.
Answers
Opposite charges attract, right? So then, sodium ions will attract chloride ions and form an ionic bond. By the way, chloride is the term used to designate the anion form of chlorine. The result is a crystallized salt that has properties that are different from the two parent elements (sodium and chlorine). The chemical formula for sodium chloride is NaCl, which means that for every sodium atom present, there is exactly one chloride atom.
Sodium chloride has a molar mass of 58.44 grams per mole. It appears as a solid, clear crystal with little or no odor. As a salt, sodium chloride dissolves well in water and the ions in the crystals will separate when in solution. Have you ever added salt to a pot of boiling water, maybe to make pasta? You can see how instantly the little crystals dissolve, or break apart in the water.
Sodium chloride molecules can also stack on top of each other in a structure known as a lattice and the solid crystals of sodium chloride will contain this lattice-type arrangement.
The structure of solid Sodium chloride can be described as a giant ionic structure and the formula is NaCl, to show that for every sodium atom their is a chloride atom.
Meaning of Sodium chlorideSodium chloride is mostly known as salt, though sea salt contains other chemical salts).
it has a giant ionic structures which does not only denote big structure, but the capacity to possess billions of atoms.
Sodium chloride is an ionic compound with a chemical formula of NaCl, which represents that the ration of sodium to chloride is one ratio one (1:1)
Soduim chloride has been used in so many ways by man which includes: salt for food, ice removal from roads, osmosis enhancer etc.
In conclusion, The structure of solid Sodium chloride can be described as a giant ionic structure and the formula is NaCl, to show that for every sodium atom their is a chloride atom.
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I’ll give brainlist:)
Explain your choice of time units. Include what you think is a
reasonable estimate of the age of Earth.
Answers
How many grams of present in 2.1x1026 atoms of cesium?
Answers
Answer:
46000 g Cs
General Formulas and Concepts:
Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
2.1 × 10²⁶ atoms Cs
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of Cs - 132.91 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 2.1 \cdot 10^{26} \ atoms \ Cs(\frac{1 \ mol \ Cs}{6.022 \cdot 10^{23} \ atoms \ Cs})(\frac{132.91 \ g \ Cs}{1 \ mol \ Cs})[/tex]Divide/Multiply: [tex]\displaystyle 46348.6 \ g \ Cs[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
46348.6 g Cs ≈ 46000 g Cs
How much would the kinetic energy of an object decrease if you reduced its speed in half but not its mass?
Answers
Answer:
In half it would go twice as far but the effect of lost kinetic energy is lessened.( I could be wrong)
If the speed of an object is reduced to half then, the kinetic energy decreases to one-fourth of the initial value.
What is kinetic energy?Kinetic energy is the energy generated by virtue of motion of a body. Kinetic energy is directly proportional to the mass and square of the speed of the body.
The equation for kinetic energy is written as [tex]K = \frac{1}{2} mv^{2}[/tex] . Thus kinetic energy increases by four folds if we increase speed by double.
Now, if speed reduced to half that is, v changes to v/2 then, the term in equation becomes v²/4. Hence, kinetic energy decreases to one by fourth of its initial value.
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What type of charge does each part of an atom have (positive, negative, no charge)
Protons:
Neutrons:
Electrons:
Answers
P-positive
N-negative
E-no charge
neutrons have no change
and protons have a positive
how many grams of CO2 can be produced from the combustion of 10 moles of O2? please anwser soon
original question; If you have 10 moles of oxygen (O2), how many grams of CO2 are produced during this combustion? Solve and record your answer
using this equation
C3H8+502->3CO2+4H2O
Answers
Answer:The first thing you need to do is to write the correctly balanced equation for the combustion of C2H2.
2C2H2 + 5O2 ==> 4CO2 + 2H2O ... balanced equation
Next, we find which reactant, if any, is limiting. There are several ways to do this, but one easy way is to find moles of each reactant, and divide that value by the coefficient in the balanced equation and see which is less.
For C2H2, we have...
1.26 g x 1 mole/26.04 g = 0.0484 moles C2H2 (÷2 = 0.0242)
For O2, we have...
3.39 g O2 x 1 mol/32 g = 0.1059 moles O2 (÷5 = 0.0211) <- This is less than 0.0242 so it is limiting
Next, we use the moles of the limiting reactant (0.1059, not 0.0211) to find moles and then grams of CO2:
0.1059 moles O2 x 4 moles CO2/5 mole O2 x 44 g CO2/mole CO2 = 3.73 g CO2
Explanation:
Which describes the amplitude of a wave when it carries more energy?
It is higher.
O It is lower.
O It is darker.
O It is lighter.
Answers
Answer:
It is higher.
Explanation:
The amplitude of a wave that carries more energy is usually higher.
The energy carried by a wave is related to the amplitude in such a manner that it is proportional to the square amplitude.
Amplitude is the maximum vertical displacement of a wave moving along its path.
Energy of wave and its amplitude are directly proportional to one another.If the energy of wave is doubled, the amplitude is quadrupled. So, the higher the energy of a wave, the more its amplitude.Answer:
The answer is A: It is higher.
Explanation:
When the amplitude of a wave is increased, the energy also increases. Also, as anticipated, if the amplitude is decreased, then the energy in the wave will decrease.
Which of the following is the primary medium for beach erosion?
ice
gravity
wind
water
Answers
Answer:
Water is the primary erosion
hope it helps :)
What is the BEST way to determine if a chemical change has occurred?
1. try and ignite the substance
2. examine the properties before and after the change
3. try and melt the substance
4. see if you can reverse the process
Answers
Answer:
2. examine the properties before and after the change
why do numbers have to be added to the
reactants?
Answers
Answer:
The reacting materials (reactants) are given on the left, and the products are displayed on the right, usually separated by an arrow showing the direction of the reaction. ... Reactions are balanced by adding coefficients so that there are the same number of atoms of each element on both sides of the reaction.
Explanation:
What does Transform boundaries mean?
Answers
Answer/Explanation
Transform boundaries are places where plates slide sideways past each other. Many transform boundaries are found on the sea floor, where they connect segments of diverging mid-ocean ridges. California's San Andreas fault is a transform boundary.
Answer:
Transform boundaries means that the Earth’s tectonic plates slide past each other horizontally along transform or strike-slip faults. The 2 transform boundaries are divergent and convergent.
Divergent plate boundary: when the plates are moving far away from each other.....← →
Convergent plate boundary: when the plates start to collide with each other......→ ←
Hope this helped!
Have a supercalifragilisticexpialidocious day!
a. How many grams of H2 gas are produced if 32
grams of CH4 gas are consumed?
Answers
Mass of H₂ produced = 12 g
Further explanationGiven
32 grams of CH₄
Required
mass of H₂
Solution
Reaction
CH₄ + H₂O (+ heat) → CO + 3H₂
mol CH₄(MW= 16 g/mol) :
= mass : MW
= 32 g : 16 g/mol
= 2
From the equation, mol ratio CH₄ : H₂ = 1 : 3, so mol H₂ :
= 3/1 x mol CH₄
= 3/1 x 2
= 6
Mass H₂(MW = 2 g/mol) :
= mol x MW
= 6 x 2
= 12 g
What are the two toxic byproducts of incomplete combustion?
Select one:
a. oxygen, carbon monoxide
b. carbon, oxygen
c. water, carbon dioxide
d. carbon, carbon monoxide
Answers
SKETCH OF J.JTHOMSON MODEL OF AN ATOM.
Answers
Answer:
Ball with thingies around it
Question 1 (True/False Worth 2 points) (02.02 MC) Burning wood represents a chemical change True or False
Answers
Answer:
True
Explanation:
Because burning is a chemical reaction. Morever chemical change can not be reverse wood becomes ashes and smoke after burning and wood can not be again formed by ashes and smoke.
Find the formula for a hydrate (salt containing water) which is 55.2% NiSO4, and 44.8% H20.
Answers
The formula for a hydrate : NiSO₄. 7H₂O
Further explanationGiven
55.2% NiSO₄, and 44.8% H₂O
Required
The formula
Solution
MW NiSO₄ = 154,75 g/mol
MW H₂O = 18 g/mol
Mol ratio :
NiSO₄ : 55.2 : 154,75 g/mol = 0.357
H₂O : 44.8 : 18 g/mol = 2.49
Divide by 0.357 :
NiSO₄ = 0.357/0.357 = 1
H₂O = 2.49/0.357 = 7
The speed of a wave on a rope is 50cm/s an its wave
length is 10cm. What is its frequency
Answers
Answer:
Speed = frequency x wavelength 50 cm/s = Freq x 10cm
Explanation:
the pull of gravity of ______ (choices: the moon only, the sun only, the moon and sun) causes Earth’s crust and oceans to bulge. This creates high and low tides.
_____ (choices: Spring, Neap, Seasonal) tides occur when the Sun, the moon, and Earth are nearly aligned. ____ (choices: spring, neap, seasonal) tides happen when the Sun and the moon are at right angles to each other. Each of these special tides happens ____ (choices: once, twice, four times) in a lunar cycle.
Answers
Answer: the moon and sun
Explanation:
help please!!
*8th grade science
Five friends are eating ice cream. They wondered why their metal spoons were so cold. This is what they said:
Dane: I think the cold from the ice cream was transferred to the spoon.
Alex: I think a metal spoon is a good conductor of cold.
Mayra: I think heat from my hand moves through the spoon to the ice cream.
Elise: I think it is because there is more cold than heat.
Astrid: I think it is because things made of metal are cold.
Who do you think has the best idea? Explain your thinking using your knowledge of heat transfer as well as your
knowledge of insulators and conductors.
Answers
Answer:
alex
Explanation:
I dont know how to explain it but it is alex
If the mass of the object below is 28g, what is the density of the object below. Units are in cm below. Please round your answer to the hundredths place. Зcm 2cm 5cm
Answers
Answer:
d = 0.93 g/cm³
Explanation:
Given data:
Mass of object = 28 g
Volume of object = 3cm×2cm×5cm
density of object = ?
Solution:
Volume of object = 3cm × 2cm ×5cm
Volume of object = 30 cm³
Density of object:
d = m/v
by putting values,
d = 28 g/ 30 cm³
d = 0.93 g/cm³
helpppp plzzzzzz it's due Monday :(
A) B) C) D) E) F) G)
H) I) J) K) L) M) N)
O) P) I need to identify whether they are compounds, elements, mixtures, a mixture of compounds, a mixture of elements, or a mixture of compounds & elements
Answers
Answer: but thx for the points
Explanation:
During an experiment, a student moves a cell from pure water to salted water. What will most likely happen to the cell?
Answers
Answer:
It will shrivel.
Explanation:
Because it is a hypertonic solution
Answer:
Explanation:
the solution will be hypertonic
the cell will shrink due to exosmosis and all water constituents of the cell will move out so cell will shrink
hope it helps
mark as brainlist please i need 1 more
