Chemistry College
Answers
Answer 1
Answer:
From these two values, i.e. mass and volume, density of the copper cylinder can be calculated.
Formula of density is :
Density = Mass / volume.
Now we have mass: 53.76g and volume 6cm³
Density = 53.76 / 6
Density= 8.96 g/cm³
Related Questions
The volume of a single molybdenum atom is 1.05*10^-23 cm^3. What is the volume of a molybdenum atom in micro liters
Answers
Answer:
1.05 × 10^-20 microlitres
Explanation:
The computation of the volume of a molybdenum atom in micro liters is shown below:
As we know that
1 litre = 1000cm^3
1 microlitre= 10^-6 litre
Therefore
1 cm^3 = 10^3 microlitres.
hence,
1.05 × 10^-23 cm^3 = 1.05 × 10^-20 microlitres
Hence, the volume of a molybdenum atom in micro liters is 1.05 × 10^-20 microlitres
The same is to be considered
.
Can you explain why you feel warm when you are standing near a campfire?
Answers
Answer:
You feel warm when you stand near a campfire because the flames of the fire warm your body. The heated waves are hit towards you and your body feels warm.
Hope this helped :)
Explanation:
PRACTICE PROBLEM Two compounds, A and B, have the same molecular formula, C6H8. Both A and B react with two molar equivalents of hydrogen in the presence of platinum to yield cyclohexane. Compound A shows three signals in its broadband decoupled NMR spectrum. Compound B shows only two NMR signals. Compound A shows an absorption maximum at 256 nm, whereas B shows no absorption maximum at wavelengths longer than 200 nm. What are the structures of A and B
Answers
Answer:
See explanation
Explanation:
One basic thing that we must keep in mind is that A and B are both dienes.
The NMR spectrum and absorption maxima of A and B indicates that A may be a conjugated diene while B may be an isolated diene.
Remember that conjugated dienes shift the absorption maxima to longer wavelengths due to π - π* transition.
The two structures attached may suffice for compounds A and B
Which type of bonds do polar covalent bonds break down in chemical reactions?
A. polar covalent and ionic bonds
B. nonpolar covalent bonds and polar covalent bonds
C. ionic bonds and nonpolar bonds
D. none of the above
Answers
Answer:
(C) im pretty sure is the answer
Explanation:
The type of bonds does polar covalent bonds break down in chemical reactions is ionic bonds and nonpolar bonds. Therefore, option C is correct.
What is an ionic bond ?
Ionic bond is also known as electrovalent bond. The term ionic bond is defined as a chemical bond formed when one atom gives up one or more electrons to another atom.
It is also defined as when positively charged particle produce a bond with negatively charged particle. The chemical molecule sodium chloride is an example of an ionic bond.
In ionic bonding, the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities. The type of bonds does polar covalent bonds break down in chemical reactions is ionic bonds and nonpolar bonds.
Thus, option C is correct.
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CH3F contains polar covalent bond?
Answers
Answer:
CH3F is a polar molecule due to the presence of a very electronegative fluorine (3.98) as one of the outer atoms which pulls electrons towards it inducing a partial negative charge
Explanation:
Which of the items below is a colloid?
a.fruit salad b.gelatin c.lacquer
Answers
Answer:
b. gelatin
Explanation:
a hom*ogeneous noncrystalline consisting of large molecules or ultramicroscopic particles of one substance.
After heating the solution, you decant the liquid and wash the remaining solid with distilled water. What you are removing by this washing?
Answers
Answer:
The solvent
Explanation:
After the solid is recoverd by decanting the liquid, some solvent particles may still adhere to the solid.
In order to remove the solvent that may have adhered to the solid completely , the solid is washed before it is now dried.
In order to remove the remaining liquid present the solid material.
We are washing the solid in order to remove the liquid particles that is attached to the solid material with the help of water. Water is a universal solvent that dissolve large number of solutes in it.
Water removes the liquid from the solid by attaching with that liquid or dissolving in it so that's why we use water for washing a solid in order to remove the impurities from the solid material in which it is placed.
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what is true about mass
Answers
Answer:
Mass is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.
Explanation:
I have leaned it
The growth of a certain plot was measured over a period of more than a month. How many centimeters did the plant grow between day 10 and day 30. 0.5 cm 1.0 cm 1.5 cm 2 cm
Answers
Answer:
2cm would be the answer I think
Convert 15.5 pounds to kilograms. Please and thank you so much!!
Answers
Answer:
7.030682 kg
hope it helps!
Answer:
7.030682
Explanation:
Give the spectator ions for the reaction that occurs when aqueous solutions of H2SO4 and KOH are mixed.
a. OH- and K+
b. H+ and SO4-2
c. K+ and SO4-2
d. H+ and OH-
e. No spectator ions are present.
Answers
Answer:
Option C. K⁺(aq) and SO₄²¯(aq)
Explanation:
We'll begin by writing the ionic equation between H₂SO₄ and KOH.
This is illustrated below:
In solution, H₂SO₄ and KOH will dissociate as follow
H₂SO₄ (aq) —> 2H⁺ (aq) + SO₄²¯ (aq)
KOH (aq) —> K⁺ (aq) + OH¯ (aq)
Thus, aqueous H₂SO₄ and KOH will react as follow:
H₂SO₄ (aq) + 2KOH (aq) —> K₂SO₄ (aq) + 2H₂O (l)
Ionically:
2H⁺(aq) + SO₄²¯(aq) + 2K⁺(aq) + 2OH¯(aq) —> 2K⁺(aq) + SO₄²¯(aq) + 2H₂O (l)
The spectator ions are those ions that appear on both sides of the equation.
From the above ionic equation, the spectator ions are:
K⁺(aq) and SO₄²¯(aq)
how light warms up matter
Answers
Answer:
Tom Zepf of the physics department at Creighton University in Omaha, Neb., notes that "Sunlight heats a material such as water or a brick primarily because the long wavelength, or infrared, portion of the sun's radiation resonates well with molecules in the material, thereby setting them into motion.
branliest pls?????/
Explanation:
What volume (in mL) will a sample of F2 gas occupy in a syringe at 5.5 atm, if the F2 has a volume of 25.0 mL at 1.2 atm?
Answers
Answer:
5.45mL
Explanation:
Using Boyle's law equation:
P1V1 = P2V2
Where; P1 = initial pressure
P2 = final pressure
V1 = initial volume
V2 = final volume
According to this question, P1 = 1.2atm, V1 = 25mL, P2 = 5.5atm, V2 = ?
1.2 × 25 = 5.5 × V2
30 = 5.5V2
V2 = 30/5.5
V2 = 5.45mL
Therefore, 5.45 mL sample of F2 gas will occupy a syringe at 5.5atm.
An atom of nitrogen gains how many electrons when it forms ionic bonds with three atoms of potassium?
A. 1
B. 2
C. 3
D. 4
Answers
The answer is C.3. 3 electrons are formed in ionic bonds.
Science...............
Answers
Hey :)
The answer is metals and non-metals
The elements in the periodic table can also be divided according to whether they are metals, metalloids or non-metals. The zigzag line separates all the elements that are metals from those that are non-metals
Hope this helps!
A bomb calorimeter with a heat capacity of 837 J∘C contains 745 g of water. It burns 2.50 g C8H18 resulting in the temperature going from 15.0∘C to 33.8∘C. What is the value of the heat transferred (in kilojoules) by the reaction from the perspective of the system?
Answers
Answer:
74.3kJ are transeferred
Explanation:
In the bomb calorimeter, the burning of C₈H₁₈ is producing heat that is been absorbed for the calorimeter and the water.
Heat absorbed calorimeter:
837J/°C * (33.8°C-15.0°C) = 15735.6J
Heat absorbed water:
C*m*ΔT
C specific heat of water (4.184J/g°C), m is mass of water (745g), and ΔT change in temperature (33.8°C - 15°C = 18.8°C)
4.184J/g°C*745g*18.8°C = 58601.1J
Heat released by the reaction:
15735.6J + 58601.1J = 74336.7J
74.3kJ are transeferred
the acid present in our stomach is ________.
A.nitric acid
B.sulphuric acid
C.hydrochloric acid
D.carbonic acid
Answers
Answer:
c, hydrochloric acid
Explanation:
How many atoms are there in 46.4 g of sulfur?
Answers
Answer:
371.2
Explanation:
A student ran the following reaction in the laboratory at 751 K: N2(g) + 3H2(g) 2NH3(g) When she introduced 3.47×10-2 moles of N2(g) and 6.38×10-2 moles of H2(g) into a 1.00 liter container, she found the equilibrium concentration of H2(g) to be 6.25×10-2 M. Calculate the equilibrium constant, Kc, she obtained for this reaction.
Answers
Answer:
Kc = 4.86×10⁻⁶
Explanation:
We begin from the equation:
N₂ + 2H₂ ⇄ 2NH₃
We start from 3.47×10⁻² moles of N₂(g) and 6.38×10⁻² moles of H₂(g), so when we reach the equilibrium, we get 6.25×10⁻² moles of H₂.
This data means, that in the reaction we made react:
6.38×10⁻² - x = 6.25×10⁻²
x = 1.3×10⁻³ moles of H₂
As stoichiometry is 1:3, we will know that the moles of N₂ that have been reacted were:
1.3×10⁻³ moles / 3 = 4.33×10⁻⁴ moles of N₂
So, in the equilibrium we would have:
3.47×10⁻² moles of N₂ - 4.33×10⁻⁴ moles of N₂ = 0.0343 moles of N₂
How many ammonia, would we have in the equilibrium?
4.33×10⁻⁴ mol . 2 = 8.66×10⁻⁴ moles (from stoichiometry with N₂, 1:2)
(1.3×10⁻³ mol . 2) / 3 = 8.66×10⁻⁴ moles (from stoichiometry with H₂, 2:3)
Let's make the expression for Kc
Kc = [NH₃]³ / [N₂] . [H₂]²
(8.66×10⁻⁴ )³ / (0.0343 . (6.25×10⁻²)² = 4.86×10⁻⁶
Lions and cheetahs live in the same area and both eat they same type of prey. Which type of competition occurs between a lion and a cheetah?
intraspecific
predator-prey
interspecific
mutualism
Answers
Predator prey is the answer because they both kill the same type of animals
what is the relationship between the atomic number and the melting and boiling point
Answers
Answer:
As the atomic number of elements increases, the melting point increases because there are more electrons around the nucleus, which creates a stronger negatively-charged force. With stronger forces, the melting point rises. 3. Non-metals usually have low melting points.
Explanation:
The melting point rises as the atomic number of elements increases because there are more electrons surrounding the nucleus, creating a stronger negatively charged force. The melting point rises as the forces become stronger.
What is nucleus?The nucleus is made up of protons, which are positively charged, and neutrons, which are electrically neutral. Quarks are particles that make up protons and neutrons. The nucleus (plural, nuclei) is a positively charged region in the atom's center. It is made up of two types of subatomic particles that are tightly packed together. Protons, which have a positive electric charge, and neutrons, which have a neutral electric charge, are the particles. The nucleus is the most important component of the cell (plural: nuclei). It is derived from a Latin word that means "nut kernel." Definition of Nucleus: A nucleus is a double-membraned eukaryotic cell organelle that contains genetic material.
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Wht is 30.00 grams of H3PO4
Answers
Answer:
0.31 mol
Explanation:
Calculate the equilibrium concentration of H3O in the solution if the initial concentration of C6H5COOH is 0.056 M . Express your answer using two significant figures.
Answers
Answer:
1.9 × 10⁻³ M
Explanation:
Step 1: Write the acid ionization of benzoic acid
C₆H₅COOH(aq) + H₂O(l) ⇄ C₆H₅COO⁻(aq) + H₃O⁺(aq)
Step 2: Calculate the acid ionization constant (Ka) of benzoic acid
The pKa of benzoic acid is 4.20
pKa = -log Ka
Ka = antilog -pKa = antilog -4.20 = 6.31 × 10⁻⁵
Step 3: Calculate the equilibrium concentration of the hydronium ion
Considering that the initial concentration of the benzoic acid is Ca = 0.056 M, we can calculate the equilibrium concentration of the hydronium ion using the following expression.
[H₃O⁺] = √(Ca × Ka) = √(0.056 × 6.31 × 10⁻⁵) = 1.9 × 10⁻³ M
For something to be considered
dead, it used to do what?
Answers
Answer:
breathe,eat, and drink i guess
A dolphin can travel 30 miles in 2 hours. What is the dolphin's speed (Remembers = d+t)
Answers
15 mph I think iajhus
Answer:
The dolphin's fast cruising speed (a travelling speed they can maintain for quite a while) is about 3-3.5 m/s (6-7 knots, 11-12.5 km/hr)
Explanation:
so 37 kilometers
27.8 mL solution of 0.797 M HCHO2 with 0.928 M NaOH. What is the pH for the solution at the equivalence point in the titration?
Answers
Answer:
8.69 is the pH at the equivalence point
Explanation:
Formic acid, HCHO₂, reacts with NaOH as follows:
HCHO₂ + NaOH → NaCHO₂ + H₂O.
At the equivalence point you will have in the reaction just NaCHO₂ and H₂O. The concentration of NaCHO₂ will be:
Moles: 0.0278L * 0.797mol/L = 0.02216moles
To reach the equivalence point it is necessary to add:
0.02216mol * (1L / 0.928mol) = 0.0239L
Total volume in the equivalence point:
0.0278L + 0.0239L = 0.0517L
Concentration: 0.02216moles / 0.0517L = 0.429M
The equilibrium of NaCHO₂, CHO₂⁻, in water is:
CHO₂⁻(aq) + H₂O(l) ⇄ OH⁻(aq) + HCHO₂(aq)
Where Kb, 5.56x10⁻¹¹ is defined as:
5.56x10⁻¹¹ = [OH⁻] [HCHO₂] / [CHO₂⁻]
In the equilibrium, it is produced X OH⁻ and HCHO₂, and as concentration of NaCHO₂ is 0.429M:
5.56x10⁻¹¹ = [X] [X] / [0.429M]
2.383x10⁻¹¹ = X²
4.88x10⁻⁶ = X = [OH⁻]
As pOH = -log [OH⁻]
pOH = 5.31
And pH = 14 - pH
pH = 8.69 is the pH at the equivalence point
which of the following determines an object’s ability to float in water?
a. how much the object weighs
b. what the mass of the object is
c. how dense the object is
d. the volume of the object
Answers
Density of the object! :)
A. because it object is weighs
Pls, Help ASAP with 30 points!!!
Describe the similarities and differences between the eruptions of
less gassy and more gassy magma.
Answers
Answer:
the difference is tyat eruptions of less gassy and more gassy is that the less gassy doesnt retain as much gas as the more gassy one and thus the eruption of the less gassy is less damage to the more gassy
A girl goes to the doctor because she is dealing with a terrible case of acne. The doctor tells her it is due to clogged ducts. Which gland is most likely having a problem?
sebaceous
adrenals
pineal
thyroid
Answers
Answer:
Sebaceous
Explanation:
Answer:
Sebaceous
Explanation:
Just did the assignment
How many milliliters of 0.500 M HBr would be required to react with 40.0 mL of 0.300 M Ca(OH)2?
Answers
Answer:
48dm³
Explanation:
Given reaction:
Ca(OH)₂ + 2HBr → CaBr₂ + 2H₂O
Parameters:
Concentration of HBr = 0.5M
Volume of Ca(OH)₂ = 40mL
Concentration of Ca(OH)₂ = 0.3M
Solution:
To solve this problem, we are going to use the mole concept. We solve from the known specie to the unknown.
We first find the number of moles of the known specie which is the Ca(OH)₂ ;
number of moles = concentration x volume
number of moles = 0.3 x 40 x 10⁻³ = 0.012moles
From the reaction equation;
1 mole of Ca(OH)₂ requires 2 moles HBr
0.012 moles of Ca(OH)₂ will require 0.012 x 2 = 0.024moles of HBr
Now,
To find the volume of HBr;
Volume = [tex]\frac{number of moles }{concentration}[/tex]
Volume = [tex]\frac{0.024}{0.5}[/tex] = 0.048dm³
In mL;
Volume 0.048 x 1000 = 48dm³