Answer:
of N ( nitrogen): 12
of O (oxygen): 30
Both lowercase letters have to be present for the recessive trait to show.
A. True
B. False
Upon combustion, a compound containing only carbon and hydrogen produces 2.28 gCO2 and 0.702 gH2O. Find the empirical formula of the compound.
Answer:
EF = CH₂
Explanation:
The empirical formula of any compound would be the most simplified and simple chemical formula of a compound. To get this number, we need to get the data of how many moles of each atom of the compoud we have.
Analyzing the data, we just know that an unknown compound undergoes a combustion reaction and produces CO₂ and H₂O. As the compound only have Carbon and hydrogen, it's pretty easy to get the moles of each atom.
To get the moles of CO₂, we need the molar mass of CO₂, which is 44 g/mol, then the moles:
nCO₂ = 2.28 / 44 = 0.0518 moles of CO₂.
Now that we have the moles of CO₂, we can get the moles of Carbon. Since 1 mole of CO₂ is made of 1 mole of Carbon and 2 moles of oxygen, this means that we have 0.0518 moles of C.
Applying the same thing with the water, we have:
nH₂O = 0.702 / 18 = 0.039 moles of water
And 1 mole of water is made of 1 mole of oxygen and two moles of hydrogens, then the moles of Hydrogen are 0.078 moles.
With these moles, we can now calculate the empirical formula.
C = 0.0518 / 0.0518 = 1
H = 0.078 / 0.0518 = 1.51 ≅ 2
Now these two numbers, give us the number of atoms, in the empirical formula so:
EF = CH₂Of course there is no compound that have only those number of atom, but remember that this is the empirical formula, so, it's a simplified or reduced formula of the molecular formula, which means that the real or whole molecular formula could have more atoms of C and H, but to know this, we need the molar weight of this compound, and the problem does not give this data.
Hope this helps
An astronomer studying planets outside our solar system has analyzed the atmospheres of four planets. Which of these planets’ atmospheres would be most able to support a colony of humans? Planet C: 78% Nitrogen, 1% Oxygen, 21% Other Planet B: 82% Nitrogen, 11% Oxygen, 7% Other Planet A: 76% Nitrogen, 23% Oxygen, 1% Other Planet D: 27% Nitrogen, 3% Oxygen, 70% Other
Answer: Planet A: 76% Nitrogen, 23% Oxygen, 1% Other
Explanation: Hope this helps!
An astronomer studying planets outside our solar system has analyzed the atmospheres of four planets. The planets’ atmospheres would be most able to support a colony of humans is Planet A: 76% Nitrogen, 23% Oxygen, 1% Other. Therefore, option C is correct.
What is solar system ?The term solar system is refer to the sun and planets, comets, asteroids and meteors which revolve around the sun to produce the solar system. The sun is the nearest star which is the main source of light for all the planets.
An astronomer studying planets outside our solar system has studied the atmospheres of four planets. The planets’ atmospheres would be most able to support a colony of humans is Planet A: 76% Nitrogen, 23% Oxygen, 1% Other.
Thus, option C is correct.
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A metal crystallizes in the face‑centered cubic (FCC) lattice. The density of the metal is 12020 kg/m3, and the length of a unit cell edge, , is 389.08 pm. Calculate the mass of one metal atom in grams.
Answer:
1.7700×10^-22 g
Explanation:
A face-centered-cubic cell contains 4 atoms, so the volume per atom is ...
(389.80×10^-12 m)³/(4 atoms) ≈ 1.4725×10^-29 m³
Then the mass of 1 atom is ...
(12020 kg/m³)(1.4725×10^-29 m³) ≈ 1.76995×10^-25 kg
≈ 1.7700×10^-22 g
_____
Additional comment
That is the approximate mass of a Palladium atom.
Answer:
1.7700×10^-22 g
Explanation:
HOW LONG WILL IT TAKE TO PRODUCE 2DM3 OF CHLORINE GAS BY PASSING A 6A
CURRENT THROUGH CONCENTRATED SODIUM CHLORIDE SOLUTION AT R.T.P?
Answer:
2679.5 seconds or 2679.5 / 60 = 44.66 minutes to produce 2 dm3 of chlorine gas.
Explanation:
To solve this we must be knowing each and every concept related to current. Therefore, it will take 44.66 minutes to produce 2 dm³ of chlorine gas by passing 6A current through concentrated sodium chloride solution.
What is current?When an electrical current continually runs in a single direction, it is said to be in direct current. Rectifiers, batteries, generators using commutators, and fuel cells all generate direct current. A flashlight or an appliance powered by batteries, for instance, both use direct current.
Among the most crucial subjects addressed in physics is AC, DC current. A form of electrical current known as an alternating current, sometimes known as an AC current, is one in which the direction of electron flow changes periodically.
2679.5 / 60 = 44.66 minutes to produce 2 dm3 of chlorine gas by passing a 6A current through concentrated sodium chloride solution.
Therefore, it will take 44.66 minutes to produce 2 dm³ of chlorine gas by passing 6A current through concentrated sodium chloride solution.
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Hey guys. Sorry for all the questions. But I’m checking my answers for a Science test. Here are my questions.
1. Which type of energy does moving water have?
A. Electrical
B. Wind
C. Kinetic
D. Potential
2. A teacher walks quickly by a student sitting at her desk. Which term describes what the student observed?
A. Speed
B. Motion
C. Position
D. Force
Thank you!!
Answer:
1. c 2. b that's what i think i learned this in middle school i dont completely remember
N4P10
There are ____________ phosphorus atoms
What coefficients do you need to balance the following equation Rb, P, Rb3P
Answer:
3,1,1 would work
Explanation:
what is the physical property to the temperature when a liquid begins to boil?
Answer:
The boiling point
Explanation:
The boiling point is the temperature where a liquid starts to boil.
Answer:
the boiling point.
Explanation:
What is the name given to substances that are initially involved in a chemical reaction?
Answer:
the awnser is reactants
Define Fusion and Fission.
I just need a summed up answer.
Answer:
Fission and fusion are two physical processes that produce massive amounts of energy from atoms. They yield millions of times more energy than other sources through nuclear reactions.
Explanation:
Hope this answer your question.
A Bunsen burner usually burns methane gas (CH4) using words, write the chemical equation for this reaction.
The general chemical equation for the complete combustion (or burning) of some hydrocarbon fuel is, in words, as follows:
hydrocarbon fuel and oxygen gas react to produce carbon dioxide gas and water vapor,
or, using chemical notation,
[tex]\mathrm{C_xH_y} + z\mathrm{O_2} \rightarrow \mathit{x}\mathrm{CO_2} + \frac{\mathit{y}}{2}\mathrm{H_2O}[/tex]
where
[tex]z = x + \frac{y}{4}.[/tex]
Don't worry if that looks daunting. In our case, we are given the identity of the fuel (methane, or CH₄), so our equations will be straightforward.
In words: Methane gas and oxygen gas react to produce carbon dioxide gas and water vapor (or methane gas + oxygen gas → carbon dioxide gas and water vapor).
In chemical notation:
[tex]\mathrm{CH_4}_{\text{(g)}} + 2\mathrm{O_2}_{\text{(g)}} \rightarrow \mathrm{CO_2}_{\text{(g)}} + 2\mathrm{H_2O}_{\text{(g)}}.[/tex]
Plz answer the question in the picture.
Answer:
a
Explanation:
a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.
Answer:
A digram show mixture
Because mixture is formed by simple mixing of many substances
And figure A shows different substances
Explanation:
Can someone please check my answer for question 2? If It’s wrong please correct me. Thank you
The new volume : V₂ = 1185.9 cm³
Further explanationGiven
V₁ = 571 cm³
T₁ = 260 K
T₂ = 540 K
Required
The new volume (V₂)
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Input the value :
V₂ = V₁.T₂/T₁
V₂ = 571 x 540 / 260
V₂ = 1185.9 cm³
Answer:
V₁ = 571 cm³
T₁ = 260 K
T₂ = 540 K your right
Explanation:
The new volume will by 1185.9
Iron is a mineral. A nail made out of iron
a mineral.
Answers:
Is also
Is not
Answer:
is also
Explanation:
if iron is a mineral then a nail is a mineral to
List six different branches of science
Answer:
Biology, Chemistry, Geology, Astronomy, physics, Zoology
Answer:
1. biology- the study of living things
2. astronomy- the study of space
3. chemistry- the study of composition, properties and energy change of matter
4. geology- the study of solid earth like rocks
5. ecology- the study of relationship between living things and their environment
6.physics- the study of the structure of matter and the interactions between the fundamental constituents of the observable universe.
N2 + 3 H2 → 2 NH3
After performing an experiment, you find that when 52.5g
H2 reacts with excess N2, 290g NH3 is formed. What is the
percent yield of this reaction?
a. 90.3%
b. 98.2%
c. 89.1%
d. 102.4%
Answer:
B
Explanation:
A camper pours 500 g of coffee, initially in a pot at 80 oC, into a 110-g aluminum cup initially at 30 oC. What is the final temperature? Assume that coffee has the same specific heat as water and that no heat is exchanged with the surroundings. (cwater=4.18 J/goC). (cAluminum=0.900J/g.C)
The final temperature : t=77.74 °C
Further explanationGiven
500 g coffee, t = 80 °C
110 g aluminum cup, t = 30 °C
Required
The final temperature
Solution
Q in = Q out
Q absorbed = Q released
Q aluminum cup = Q coffee
110 x 0.9 x (t-30)=500 x 4.18 x (80-t)
99t-2970=167200-2090t
2189t=170170
t=77.74 °C
5) How could you get clean sand from a mixture of sand and little bits of
iron wire?
What is the most likely effect of an increase in precipitation?
Lakes dry up. Shortage of water. Decrease in humidity.
Predict Note the type of reaction you expect for
reactants Cu and O.
single replacement
double replacement
combustion (and synthesis)
synthesis
decomposition
Answer:
it is a combustion reaction
Answer:
Combustion (and synthesis)
Explanation:
Edge 2021
whats the powerhouse of the cell?
Answer:
Mitochondria is known as the powerhouse of the cell as it provides teh energy required for the cell to carry out cellular respiration and cellular process that maintain the cell
hii!! need help with this last answer for chem. would appreciate the help. (question 3)
Answer:
1.023 J / g°C
Explanation:
Mass, m = 37.9 g
Temperature increase (change) = 25.0°C
Heat = 969 J
Specific heat capacity , c= ?
The relationship between these quantities is given by the equation;
H = mcΔT
c = H / mΔT
c = 969 / (37.9 * 25)
c = 969 / 947.5 = 1.023 J / g°C
Count the number of bonding pairs and the number of ione pairs around the left chlorine atom
Explanation:
I think
Bonding pairs = 4
Lone pairs around the left chlorine atom = 9
What is matter?
12 points..
Explanation:
matter is a substance that has mass and it takes up space.
hope this helps!!
PLEASE HELP! 80 points!!
A metal crystallizes in the face‑centered cubic (FCC) lattice. The density of the metal is 12020 kg/m3, and the length of a unit cell edge, , is 389.08 pm. Calculate the mass of one metal atom in grams.
Identify the metal. either ( gold, silver, platinum, palladium)
Answer:
the metal is gold I'd say
The mass of one metal atom is [tex]1.770\times 10^{-22}[/tex]grams.
The metal atom is palladium.
Explanation:
Given:
A face-centered unit cell.
The density of the unit cell is [tex]12020 kg/m^3[/tex].
The edge length of the unit cell 389.08 pm
To find:
The mass of one atom of the metal
Solution:
The density of the unit cell = d = [tex]12020 kg/m^3[/tex]
The edge length of the unit cell = a = 389.08 pm
[tex]1 pm = 10^{-12} m\\a=389.08 pm=389.08\times 10^{-12} m=3.8908\times 10^{-10}m[/tex]
Total number of atoms in F.C.C unit cell = z = 4
The atomic mass of the metal atom = M
The density of the unit cell is given by:
[tex]d=\frac{z\times M}{N_A\times a^3}\\12020 kg/m^3=\frac{4\times M}{6.022\times 10^{23}mol^{-1}\times (3.8908\times 10^{-10}m)^3}\\M=0.106586 kg/mol\\1 kg=1000 g\\M=0.106586 kg/mol=0.106586 \times 1000 g/mol\\M=106.586 g/mol[/tex]
The mass of one mole of metal atom = 106.586 g
The mass of 1 atom of metal :
[tex]=\frac{106.586 g}{6.022\times 10^{23}}\\=1.770\times 10^{-22} g[/tex]
The mass of one metal atom is [tex]1.770\times 10^{-22}[/tex] grams.
The atomic mass of the metal atom is 106.586 g/mol which is close to the atomic mass of the palladium. Hence, the metal atom is palladium.
Learn more about the density of unit cell here:
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How does a chemical bond form in
sodium chloride?
Sodium atoms an electron to form a
sodium ion with a charge of
Chlorine atoms __ an electron to form a
chloride ion with a charge of ____
There is an attraction between...
Answer:
please write the question correctly or upload the image of the problem
Which is the most explosive element?
Answer:
Hydrogen is the most explosive element
How does evaporation lead to precipitation
Answer:
1.evaperation
2.condenstation
3.precipatation
Explanation:
So I guess condenstation leads to precipatation-
Answer:
Evaporation is when water/liquids changes state from a liquid to a gas. Which eventually with enough water water vapor (which is what forms when water evaporates), it turns into clouds. But when the clouds get too heavy and full of water. Rain/precipitation falls from those clouds.
-Hope this helps!
Explanation:
determine the density of an object that is 25 cm long 10 cm wide and 2 cm high with a mass of 50 g
Answer:
[tex]\boxed {\boxed {\sf \rho= 0.1 \ g/cm^3 }}[/tex]
Explanation:
Density is found by dividing the mass by the volume.
[tex]\rho=\frac{m}{v}[/tex]
The mass is 50 grams, but we have to find the volume.
Assuming this is a solid rectangular object, we can use this formula for volume:
[tex]v=l*w*h[/tex]
The length is 25 centimeters, the width is 10 centimeters, and the height is 2 centimeters.
[tex]v= 25 \ cm * 10 \ cm * 2 \ cm[/tex]
[tex]v= 250 \ cm^2 * 2 \ cm[/tex]
[tex]v= 500 \ cm^3[/tex]
Now we know the mass and volume:
[tex]m= 50 \ g\\v= 500 \ cm^3[/tex]
Substitute the values into the formula.
[tex]\rho = \frac{50 \ g}{500 \ cm^3}[/tex]
[tex]\rho= 0.1 \ g/cm^3[/tex]
The density of the object is 0.1 grams per cubic centimeter.