Answer: a neutral
Explanation: it’s an neutral because it’s all alone and there’s no chemicals
Which of the following would exert a gravitational force? (check all that apply) *
A. Sun
B. Earth
C. Moon
D. You
E. a marble
F. light
G. air
H. water
Answer: B. C and A.
Explanation:
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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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
5) How could you get clean sand from a mixture of sand and little bits of
iron wire?
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]
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
13.) Write one paragraph minimum of 6 sentences addressing your concerns or lack of concern about DHMO.
Answer:
I am not sure
Explanation:
ΔABC ~ ΔEFD
PLEASE HELP! ILL GIVE BRAINLIEST, EXPLAIN YOUR ANSWER PLS
Answer:
arteries carry blood from the heart to the lungs and veins carry blood from the lungs to the heart
Explanation:
Arteries carry oxygenated blood from the heart, while veins carry oxygen-depleted blood back to the heart. ... The pulmonary veins transport oxygenated blood back to the heart from the lungs, while the pulmonary arteries move deoxygenated blood from the heart to the lungs.)
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:
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
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
Describe how an electric field is generated.
Answer:
Electric charges produce electric fields
Explanation:
(a) Describe how a simple molecular structure differs from a giant molecular structure.
Answer:
Giant structures are usually arranged in to giant regular lattices and they are extremely strong because they have many bonds involved. Simple molecules are just normal molecules as the name suggests like CO². though it contains strong covalent bond it still has weak intermolecular forces
Explanation: when your account gets to deleted and your trying to get your points up lol
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:
Which compound is impossible?
A. Zns
B. Na2O
C. Ca3P2
D.LiCl2
PLS HELP DECOD THIS :(
The planet Superman was born on (also has the atomic number 36): (F3) R (C3) P (H1) (I1) N
Answer:
he was born on planet krypton
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:
Anybody good at chemistry that is willing to help?? If you could that'd be greatly appreciated!
(25 PTS)
Answer:
The least similar to a real gas found in the environment would be B.
Explanation:
Standard Ambient Temperature/Pressure (SATP) is at 298.15K and 101.3kPa. It describes standard conditions and is often used for measuring gas density and volume using the Ideal Gas Law. The values least similar to theses ones would be the least similar in the gases in the environment.
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
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:
What is matter?
12 points..
Explanation:
matter is a substance that has mass and it takes up space.
hope this helps!!
What coefficients do you need to balance the following equation Rb, P, Rb3P
Answer:
3,1,1 would work
Explanation:
Lead will float in water.
Actually, no. While their mass may be the same (1kg), the volume of lead is a lot smaller than that of feathers. As there is the same mass stuffed in a smaller space, it must be denser. The density of water is 1 g/cm3, so if the density of the lead is more than 1g/cm3, it has to sink
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
Which of these equations is balanced, and which is not balanced? Explain how you can tell.
a) 2C2H6+ 7O2 → 4CO2+ 6H2O
b) 2MgCO3 + H2SO4 → 2MgSO4 + H2O + 2CO2
Answer:
a is balanced
Explanation:
a) reactant/ product
(2x2)=4c / 4c
(2x6)=12h / 12 h
14o / (8o+6o)=14 o
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
For the reaction H2 + O2→ H2O, how many grams of water are produced from 6.00 mol of hydrogen?
Answer:
108 g
Explanation:
2H₂ + O₂ ⇒ 2H₂O
1) n(H₂) : n(H₂O) = 2 : 2
Hence, n(H₂O) = n(H₂) = 6,00 mol
2) m(H₂O) = n × M = 6,00 mol × (2 + 16) g/mol = 6,00 × 18 mol = 108 g
1.25mole Nocl was placed in a2.50l reaction chamber at 427c. After equilibrium was reached .1.10moles of Nocl remained.Calculate the equilibrium constant Kc for the reaction. 2Nocl(g)=2No(g)+cl2(g)
Answer:
Kc → 5.58×10⁻⁴
Explanation:
Equilibrium reaction is:
2NOCl (g) ⇄ 2NO (g) + Cl₂(g)
Initially we have 1.25 moles of NOCl
After the equilibrium, we have 1.10 moles. So, during the process:
(1.25 mol - 1.1 mol) = 0.15 moles have reacted.
As ratio are 2:2, and 2:1, 0.15 moles of NO and (0.15 /2) = 0.075 moles of chlorine, were produced in the equilibrium.
Finally in equilibrium we have: 1.10 moles of NOCl, 0.15 moles of NO and 0.075 moles of Cl₂. But these amount are not molar, so we need molar concentration in order to determine Kc:
1.10 mol /2.50L = 0.44 M
0.15 mol / /2.50L = 0.06 M
0.075 mol /2.50L = 0.03 M
Let's make expression for Kc → [Cl₂] . [NO]² / [NOCl]²
Kc = (0.03 . 0.06²) / 0.44² → 5.58×10⁻⁴
N4P10
There are ____________ phosphorus atoms
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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