Answers
Answer:
(a)
[tex]v = 10.1mL[/tex] --- Silicon
[tex]v = 9.0mL[/tex] --- Tin
[tex]v = 7.5mL[/tex] -- Lead
(b)
[tex]d = 1.55g/mL[/tex] --- Silicon
[tex]d = 5.56g/mL[/tex] --- Tin
[tex]d = 9.53g/mL[/tex] --- Lead
Explanation:
Given
The attached table
Solving (a): The volume of each sample
For each element, the volume (v) is calculated as:
[tex]v = v_f - v_i[/tex]
Where:
[tex]v_f = Final\ Volume[/tex]
[tex]v_i = Initial\ Volume[/tex]
So, we have:
Silicon:
[tex]v_f = 40.1mL;\ \ \ v_i = 30.0mL[/tex]
So, we have:
[tex]v = 40.1mL - 30.0mL[/tex]
[tex]v = 10.1mL[/tex]
Tin:
[tex]v_f = 29.0mL;\ \ \ v_i = 20.0mL[/tex]
So, we have:
[tex]v = 29.0mL - 20.0mL[/tex]
[tex]v = 9.0mL[/tex]
Lead:
[tex]v_f = 33.5mL;\ \ \ v_i = 26.0mL[/tex]
So, we have:
[tex]v = 33.5mL - 26.0mL[/tex]
[tex]v = 7.5mL[/tex]
Solving (b): The density of each sample
For each element, the density (d) is calculated as:
[tex]d = \frac{m}{v}[/tex]
Where
[tex]m = mass[/tex]
[tex]v = volume[/tex]
So, we have:
Silicon:
[tex]m = 15.70g[/tex]
[tex]v = 10.1mL[/tex] --- calculated in (a)
Density (d):
[tex]d = \frac{15.70g}{10.1mL}[/tex]
[tex]d = 1.55g/mL[/tex]
Tin:
[tex]m = 50.07g[/tex]
[tex]v = 9.0mL[/tex] --- calculated in (a)
Density (d):
[tex]d = \frac{50.07g}{9.0mL}[/tex]
[tex]d = 5.56g/mL[/tex]
Lead:
[tex]m = 71.47g[/tex]
[tex]v = 7.5mL[/tex] --- calculated in (a)
Density (d):
[tex]d = \frac{71.47g}{7.5mL}[/tex]
[tex]d = 9.53g/mL[/tex]
Related Questions
When can I use ideal gas law?
Answers
The ideal gas law can be used in stoichiometry problems in which chemical reactions involve gases. Standard temperature and pressure (STP) are a useful set of benchmark conditions to compare other properties of gases. At STP, gases have a volume of 22.4 L per mole.
Some metal chips with a total volume of 3.29 cm3 are placed on a piece of paper and weighed. The combined mass is found to be 18.43 g, and the paper itself weighs 1.2140 g. Calculate the density of the metal to the proper number of significant figures.
Answers
Answer:
d = 5.23 g/cm³
Explanation:
Given data:
Volume of metal chips = 3.29 cm³
Mass of metal chips and paper = 18.43 g
Mass of paper = 1.2140 g
Density of metal = ?
Solution:
Mass of metal = combined mass - mass of paper
Mass of metal = 18.43 g - 1.2140 g
mass of metal = 17.22 g
Density:
d = mass/ volume
d = 17.22 g/ 3.29 cm³
d = 5.23 g/cm³
does something that is hot have more thermal energy than something that’s cold?
Answers
Answer:
Yes it does because the atoms/molecules are moving faster than they are in a cold substance.
Explanation:
Aluminum metal reacts with hydrochloric acid to produce solid aluminum chloride and hydrogen gas. how many moles of aluminum are needed to produce 1.2 moles of hydrogen gas?
Answers
Moles of Aluminum needed : 0.8
Further explanationGiven
1.2 moles H₂
Required
moles of aluminum
Solution
The reaction coefficient in a chemical equation shows the mole ratio of the components of the compounds involved in the reaction (reactants and products)
Reaction(balanced equation)
2Al + 6 HCl = 2AlCl₃ + 3H₂
From the equation, mol ratio of Al : H₂ = 2 : 3, so mol Al :
= 2/3 x mol H₂
= 2/3 x 1.2
= 0.8 moles
How many moles of nitrogen are in 9.82x10^23 formula units of nitrogen? Please show work!
Answers
Answer:
1.63 mols
Explanation:
to convert mols to formula unit, or formula unit to mols, u need the avagadros number which is 6.022*10^23 and the number of mols/formula units
so since the given is formula units, u just have to divide the number by 6.022*10^23 to get the amount of mols
9.82*10^23 / (6.022*10^23) = 1.63 mols
*be careful for sig figs
How does Cyanoacrylate compare to the elements that make it up?
Answers
Answer: The elements of the cyanoacrylate are different as compared to the main cyanoacrylate.
Explanation:
The cyanoacrylate is a adhesive water based substance. It is used for developing fingerprints by fuming method. It is the acrylic monomer which has property to develop into a plastic form after application another of its composition is the acrylic resin which imparts adhesiveness to the cyanoacrylate.
3. A 240 mL sample of argon gas at 270 K is cooled until the volume is 180 mL. What is the new temperature?
Answers
Answer:
202.5 K
Explanation:
An object at rest has equal forces acting on it. This can be described as a __________ force.
Answers
explanation:
im not 100% sure but i think they would be balanced
how can you tell which compound in a solution is the solvent?
(own words please)
Answers
Answer:
The way you can know which compound in a solution is a solvent is by usually just determining which substance is a solute and which is a solvent. The solute is when it is dissolved and it takes on the characteristics of the solvent.
Explanation:
Hope this helps!
Explain Joule's law in your own words. pls help
Answers
Answer:
Joules first law is a law that expresses the relatioship between heat that is generated and the current flowing heat thats through a conductor. The second law says that internal energy is independent of volume and pressure, depending only on temperature!
Explanation:
Neeeeeeeedddddd hellllllllllppppppp
Answers
1. List the types of fronts found on this map
Answers
Answer:
Cold Front. A side view of a cold front (A, top) and how it is represented on a weather map (B, bottom). ...
Warm Front. ...
Stationary Front. ...
Occluded Front.
Which of the following was NOT used in support of the continental drift hypothesis?
fossil evidence
fit of South America and Africa
mountain ranges across continents
differences in ocean salinity levels
Answers
Answer:
fossil evidence
fit of South America and Africa
Explanation: can i have brainlist please
Dry ice changes from a solid to a gas in a process known as A. Melting B. Freezing C.sublimation
Answers
Answer:
c
Explanation:
solid to gas directly
How many formula units are in 2.5 moles of NaCl?
Answers
Answer: 1.5 x 10 24
Explanation:
One mole of NaCl contains 6.022 x 1023 NaCl formula units
In 2.5 moles of NaCl there will be basically 5 moles of ions as per the given data.
What is a compound?A material created by joining two or more distinct elements chemically in science.
A compound in chemistry is a material comprised of two or more separate chemical elements mixed together in a certain proportion.
Chemical connections that are challenging to break are created when the elements interact with one another.
2.5 mol of NaCl contains 5 moles of ions. This is due to the fact that 1 mol of NaCl contains 2 mol of ions, so you must multiply the molecular weight of the molecule by two to obtain the number of ions.
Thus, the answer is 5 moles.
For more details regarding a compound, visit:
https://brainly.com/question/13516179
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How much of earth's freshwater is in the solid state or under ground?
Answers
That would be B: 33%, but please correct me if I'm wrong ^^
Answer:
that would be b:33 i believe pls dont blame met
If a concentrated solution of acetic acid is 99.5 % HC 2 H 3 O 2 and has a density of 1.05 g/mL, what is the concentration of this acid in moles per litre?
Answers
The concentration of this acid in moles per litre : 17.41
Further explanationGiven
99.5% acetic acid
density=ρ=1.05 g/ml
Required
the concentration (mol/L)
Solution
99.5% dan density 1.05 g/ml (MW acetic acid = 60 g/mol)
[tex]\tt 99.5\%\times 1.05\dfrac{g}{ml}\times \dfrac{1000~ml}{L}=1044.75~g/L\\\\\dfrac{1044.75~g/L}{60~g/mol}=17.41~mol/L[/tex]
Wass, volume and density are all properties of
matter
3
weight.
formula
Answers
Answer:
:)
Explanation:
They are all properties of Matter. weight and formula wouldn't make sense.
The total number of the elements above with 2 valence electron is ____.
Answers
Answer:
four elements
Explanation:
He = 1s²
Be = 1s² 2s²
C = 1s² 2s² 2p²
Mg = 1s² 2s² 2p⁶ 3s²
Si = 1s² 2s² 2p⁶ 3s² 3p²
Ca = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
Valence electrons are those electrons which are present in outer most electronic shell.
He, Be, Mg, Ca these four elements have 2 valence electrons.
While Si and C have four valance electrons.
The total number of the elements above with 2 valence electron is four.
The electronic configurations of the elements are given:
He = 1s²
Be = 1s² 2s²
C = 1s² 2s² 2p²
Mg = 1s² 2s² 2p⁶ 3s²
Si = 1s² 2s² 2p⁶ 3s² 3p²
Ca = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
Valence electrons are those electrons which are present in outer most electronic shell.
He, Be, Mg, Ca these four elements have 2 valence electrons.Learn more:
brainly.com/question/16089134
Calculate the maximum mass of aluminium which can be extracted from 10 kg of
aluminium oxide
2AlO3+ 3C ----->4Al + 3CO2
Answers
Answer:
Hrishikesh. bshjsjbd. jwjjja
Under which conditions will sugar most likely dissolve fastest in a cup of water?
A. A sugar cube with stirring at 5°C
B. A sugar cube without stirring at 15°C
C. Sugar crystals with stirring at 15°C
D. Sugar crystals without stirring at 5°C
Answers
Answer:
The correct answer would be C
Explanation:
Plz correct me if wrong
The condition in which sugar is most likely to dissolve fastest in a cup of water is when sugar crystals with stirring at 15°C. Therefore, option C is correct.
What conditions are required for dissolution?Dissolution is the process by which a solute dissolves in a solvent to form a homogeneous mixture called a solution. The conditions required for dissolution are:
Agitation: The solute and solvent must be mixed together so that they come into contact with each other.Temperature: Increasing the temperature of the solvent increases the kinetic energy of its molecules, making it easier for the solute to dissolve.Pressure: Increasing the pressure of a gas above a liquid solvent can force more gas molecules into the solvent, increasing its solubility.Surface area: The rate of dissolution is directly proportional to the surface area of the solute particles exposed to the solvent. Polarity: A solute will dissolve in a solvent that has similar polarity.Thus, option C is correct.
Learn more about dissolution, here:
https://brainly.com/question/9949108
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which term refers to the condition that exists when no over all change in concentration results from diffusion?
a. concentration
b. osmosis
c. equilibrium
d. randomness
Answers
Answer:
a.cocentration es la respuesta
What element am I if I have 6 protons and
8 neutrons?
Answers
Answer:
The element you would have is Carbon-14.
Explanation:
Carbon-14 has 6 protons and 8 neutrons. To find the atomic mass, you add the protons to the neutrons, so the atomic mass of Carbon-14 is 14.
#teamtrees #WAP (Water And Plant)
17. Calculate the percent composition of B2Br6
Answers
Answer:
%composition of B₂ = 4.3%
%composition of Br₆ = 95.7%
Explanation:
Given data:
Percent composition of B₂Br₆ = ?
Solution:
Total mass of B₂Br₆ = 10.8×2 + 79.9×6 = 501 g/mol
%composition of B₂ = ( 21.6 g/ 501 g ) × 100
%composition of B₂ = 0.043 × 100
%composition of B₂ = 4.3%
%composition of Br₆ = ( 479.4 g/ 501 g ) × 100
%composition of Br₆ = 0.957 × 100
%composition of Br₆ = 95.7%
What is the molarity of a solution
made by dissolving 18.9 g of
ammonium nitrate (NH4NO3) in
enough water to make 855 mL of
solution?
Molar Mass N: 14.01 g/mol
Molar Mass H: 1.008 g/mol
Molar Mass O: 16.00 g/mol
Answers
Answer:
Molarity = 0.28 M
Explanation:
Given data:
Mass of NH₄NO₃ = 18.9 g
Volume of solution = 855 mL (855mL × 1 L/1000 mL = 0.855 L)
Molarity of solution = ?
Solution:
Number of moles of NH₄NO₃:
Number of moles = mass/molar mass
Number of moles = 18.9 g/ 80.043 g/mol
Number of moles = 0.24 mol
Molarity:
Molarity = number of moles of solute / volume in L
Molarity = 0.24 mol /0.855 L
Molarity = 0.28 M
Answer:
0.28
Explanation:
:D
BRAINLIEST!! PLZ HELP
Answers
Answer:
1.0 is Answer
Explanation:
May be this is helpful!
A gas with a volume of 2 L at 25°C is placed into a container that is 4 L. What is the new temperature of the gas?
Answers
Given :
A gas with a volume of 2 L at 25°C is placed into a container that is 4 L.
To Find :
The new temperature of the gas.
Solution :
Since, their is no information regarding pressure. We will assume that pressure is constant.
Now, we know when at constant pressure, volume is directly proportional to volume.
[tex]\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}\\\\\dfrac{2}{4} = \dfrac{25 + 273 }{x}\\\\x = 2 \times ( 25 + 273 )\\\\x = 596\ K[/tex]
Therefore, the new temperature of the gas is 596 - 273 K = 323 K.
A 0.200 M NaOH solution was used to titrate a 18.25 mL HE
solution. The endpoint was reached after 31.20 mL of titrant
were added. Find the molar concentration of the original HF
solution.
Answers
Answer:
M₂ = 0.34 M
Explanation:
Given data:
Molarity of NaOH =M₁ = 0.200 M
Volume of HF =V₂= 18.25 mL
Volume of NaOH added = V₁ = 31.20 mL
Molarity of HF solution = M₂ = ?
Solution:
M₁V₁ = M₂V₂
by putting values,
0.200 M × 31.20 mL = M₂ × 18.25 mL
M₂ = 0.200 M × 31.20 mL / 18.25 mL
M₂ = 6.24 M.mL / 18.25 mL
M₂ = 0.34 M
The soluble bases are called alkalis. *
true or false
Answers
Answer:
True
Explanation:
Those bases which are soluble in water are called alkalis
PLEASE ANSWER QUICK! 50 POINTS!!!!
How does the structure of amino acids allow them to form a polypeptide?
Options:
A. Each amino acid has an amino group and a carboxyl group.
B. Each amino acid has a hydrogen atom and a carboxyl group.
C. Each amino acid has a carboxyl group and an R group.
D. Each amino acid has an R group and a hydrogen atom.
Answers
Answer:
A. Each amino acid has an amino group and a carboxyl group.
Answer:a
Explanation: