Answer:
True
Explanation:
If dominant traits are there, then they take over. Periot
Define international system of units , where does the system originate
Answer: See explanation
Explanation:
The International System of Units (SI), is also referred to as the metric system, and it is the standard for measurement internationally.
It should be noted that the The International System of Units (SI), originated from France. It is the system of measurement that is accepted officially worldwide. e.g. S.I unit for time is seconds.
Imagine you live next door to your best friend. Your bedroom windows face each other, and you want to set up a way to communicate privately using waves. You have these supplies:
a long string
a spring toy long enough to stretch between your windows
metal cans
a Morse code alphabet decoder (Morse code is a system that represents letters of the alphabet with dots and dashes)
You can use as many of these supplies as you want.
Answer:
then use those and set up one
Explanation:
Answer:
the string and the cans for me. its like your own phone
Explanation:
QUESTION 4
2 points
How many moles of atoms are in a 408.67 grams sample of iron? (Do not include units) Report your answer to 3 significant figures.
Moles of iron = 7.30
Further explanationGiven
mass of iron = 408.67 g
Required
moles of atoms
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
mol iron-Fe (Ar = 56 g/mol)
mol = mass : MW
mol = 408.67 g : 56
mol = 7.30
What is one way a pathogen can enter the body?
Question 3 options:
Nose
Broken Skin
Mouth
All of the above
Please help me thanks so much??!!.:;))..I will mark you:))
Answer:
the last one
Explanation:
how does a compound relate to your life
Answer:
its your opinion or something
Explanation:
its your own life so how does ot relate to yours?
Answer:
most living matter consists primarily of the so called bulk elements: oxygen, carbon, hydrogen, nitrogen, and sulfur the building blocks of the compounds that constitute our organs and muscles. These five elements also constitute the bulk of our diet; tens of grams per day are required for humans.
Explanation:
hope it helps :)
The moons of Jupiter
orbit Jupiter because
they are pulled toward
Jupiter. The moons of
Jupiter are too far to
be pulled into Earth's
orbit.
Yes or No
Answer:
Yes
Explanation:
Jupiter is a very large planet. Larger planets usually have stronger gravity, which pulls planets toward each other.
The moons of Jupiter are by Jupiter. (I know, that wasn't a smart thing to say because you know that, but, hey, I had to.) With this being the case, Jupiter is also an inside planet.
- Inside Planets
Planets that are closest to the sun and orbits the sun
There are 2 things that are the cause of the moons of Jupiter not being pulled by earth.
1. Jupiter has strong gravity which pulls the moons, and Jupiter is being pulled by the sun's INCREDIBLE gravity.
2. Earth is an outside planet. It is too far away from Jupiter to attract Jupiter's moons.
- Outside Planet
A planet that is away from the sun, but still orbits the sun
Hope this helps! :D
If you want to know more about the sun, just call on me!!!!
Yes, The moons of Jupiter orbit Jupiter because they are pulled toward Jupiter. The moons of Jupiter are too far to be pulled into Earth'orbit.
What is orbit ?A planet's orbit around a star, a natural satellite's orbit around a planet, or an artificial satellite's orbit around a space object or location like a planet, moon, asteroid, or Lagrange point are all examples of curved objects that follow this path.
A planet's orbit around a star, a natural satellite's orbit around a planet, or an artificial satellite's orbit around a space object or location like a planet, moon, asteroid, or Lagrange point are all examples of curved trajectories in celestial mechanics known as orbits.
Around a star, a natural satellite's orbit around a planet, or an artificial satellite's orbit around a space object or location like a planet, moon, asteroid, or Lagrange point are all examples of curved objects that follow this path.
Yes, The moons of Jupiter orbit Jupiter because they are pulled toward Jupiter. The moons of Jupiter are too far to be pulled into Earth'orbit.
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determine the molecular mass of the following compounds
Answer:
(a).
(4 × C) + (8 × H)
= (4 × 12) + (8 × 1)
= 48+8
= 56 g
(b).
= (4 × C) + (6 × H)
= (4 × 12) + (6 × 1)
= ( 48+6 )
= 54 g
(c).
= ( 2 × Si ) + ( 4×Cl ) + (2×H)
= (2×28) + (4×35.5) + (2×1)
= 56 + 142 + 2
= 200 g
(d).
= (1×P) + (4×O) + (3×H)
= 31 + 64 + 3
= 98 g
helium gas diffuses 4 times as fast as an unknown gas. What is relative molecular mass of the gas
The relative molecular mass of the gas : 64 g/mol
Further explanationGiven
Helium rate = 4x an unknown gas
Required
The relative molecular mass of the gas
Solution
Graham's Law
[tex]\tt \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
r₁=4 x r₂
r₁ = Helium rate
r₂ = unknown gas rate
M₁= relative molecular mass of Helium = 4 g/mol
M₂ = relative molecular mass of the gas
Input the value :
[tex]\tt \dfrac{4r_2}{r_2}=\sqrt{\dfrac{M_2}{4} }\\\\16=\dfrac{M_2}{4}\\\\M_2=64~g/mol[/tex]
can u pls help me with this question
Answer:
B because they aren’t moving there solid and compacted
Explanation:
I am 5 million iq brainlest pls
The wavelength of green light from a traffic signal is centered at 5.20 x 10-7 m.
Calculate the frequency.
Answer: 5.77 * 10¹⁴s⁻¹
Explanation:
Speed = Frequency * Wavelength
Frequency = Speed/ Wavelength
Speed of light = 3 * 10⁸ m/s
Frequency = (3 * 10⁸ m/s) / (5.20 x 10⁻⁷m)
= 5.77 * 10¹⁴hz
= 5.77 * 10¹⁴s⁻¹
Which phrase describes conduction?
transfer of heat between two objects that are touching
transfer of heat by the actual movement of warmed matter
the process in which energy is released by molecules breaking apart
the process in which energy is emitted by one object, transmitted through space, and absorbed by another
Answer:
Transfer of heat between two objects that are touching.
Explanation:
Conduction is the process by which heat is transferred from one object to another object that is touching and has different temperatures.
Eg: We can use a hot water pack to warm our back. Or While cooking we can feel the conduction process when heat process from the bottom of the pan to the top of the pan
Answer:
A. Transfer of heat between two objects that are touching
Explanation:
1.03 Quiz: Three Kinds of Heat Transfer
I am in K12
If particles of matter gain or lose enough kinetic energy what can happen?
A. They can gain or lose electrons.
B. None of these
C. They can change phase.
D. They can gain or lose potential energy.
Answer:
B
When a sample of solid, liquid, or gas matter heats up, it expands. When matter gets hot, its particles gain kinetic energy. The increased kinetic energy pushes the particles farther apart. This causes the matter to expand.
None of these. Hence, option B is correct.
What is kinetic energy?Kinetic energy is a form of energy that an object or a particle has by reason of its motion.
When a sample of solid, liquid, or gas matter heats up, it expands. When matter gets hot, its particles gain kinetic energy. The increased kinetic energy pushes the particles farther apart. This causes the matter to expand.
Hence, option B is correct.
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1- A sample of Ne(g) has a volume 250 mL at 752 mm Hg. What is the
new volume if the temperature and amount of gas held constant, the
pressure is;
a) lowered to 385 mm Hg.
b) Increased to 3.68 atm
Answer:
A. 488.31 mL.
B. 67.22 mL.
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 752 mm Hg
A. Determination of the new volume when the pressure is lowered to 385 mmHg.
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 752 mm Hg
Final pressure (P₂) = 385 mmHg
Final volume (V₂) =?
P₁V₁ = P₂V₂
752 × 250 = 385 × V₂
188000 = 385 × V₂
Divide both side by 385
V₂ = 188000 / 385
V₂ = 488.31 mL
Thus, the new volume of the gas is 488.31 mL
B. Determination of the new volume of the gas when the pressure is increased to 3.68 atm.
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 752 mm Hg
Final pressure (P₂) = 3.68 atm.
Final volume (V₂) =?
Next, we shall convert 3.68 atm to mmHg. This can be obtained as follow:
1 atm = 760 mmHg
Therefore,
3.68 atm = 3.68 atm × 760 mmHg / 1 atm
3.68 atm = 2796.8 mmHg
Thus, 3.68 atm is equivalent to 2796.8 mmHg.
Finally, we shall determine the new volume of the gas as follow:
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 752 mm Hg
Final pressure (P₂) = 2796.8 mmHg.
Final volume (V₂) =?
P₁V₁ = P₂V₂
752 × 250 = 2796.8 × V₂
188000 = 2796.8 × V₂
Divide both side by 2796.8
V₂ = 188000 / 2796.8
V₂ = 67.22 mL
Thus, the new volume of the gas is 67.22 mL
What is temperature equilibrium?
A. When particles of matter have reached an equal
temperature
B. The flow of energy from one particle to another
C. When particles of matter are moving in the exact same
manner
Answer: A
Explanation: equilibrium is where all the paricles are at the
The questions are attached
Answer:
Explanation:
a) Balanced chemical equation:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
b) Mass of oxygen gas needed = ?
Mass of propane = 25 g
Solution:
Number of moles of propane = mass/molar mass
Number of moles = 25 g/ 44.1 g/mol
Number of moles = 0.57 mol
now we will compare the moles of oxygen and propane:
C₃H₈ : O₂
1 : 5
0.57 : 5/1×0.57 = 2.85 mol
Mass of oxygen:
Mass = number of moles × molar mass
Mass = 2.85 mol × 32 g/mol
Mass = 91.2 g
c) water vapors produced = ?
Mass of propane = 25 g
Solution:
Number of moles of propane = mass/molar mass
Number of moles = 25 g/ 44.1 g/mol
Number of moles = 0.57 mol
now we will compare the moles of water and propane:
C₃H₈ : H₂O
1 : 4
0.57 : 4/1×0.57 = 2.28 mol
Mass of water vapors:
Mass = moles × molar mass
Mass = 2.28 mol × 18 g/mol
Mass = 41.0 g
d)
mass of water vapors produced = 1.5 kg (1500 g)
Mass of propane reacted = ?
Solution:
Number of moles of water vapors:
Number of moles = mass/molar mass
Number of moles = 1500 g/ 18 g/mol
Number of moles = 83.33 mol
now we will compare the moles of water and propane.
H₂O : C₃H₈
4 : 1
83.3 : 1/4×83.3 = 20.8 mol
Mass of propane:
Mass = number of moles ×molar mass
Mass = 20.8 mol × 44.1 g/mol
Mass = 917 g
Need help on 13 and 17. The picture covers number 13, the question in number 17 is “Where do you think Styrofoam would be on the chart above? Why? Explain your answer?”
Answer:
13. We see a left skewed data trend with a parabolic nature. The speed of conductivity increases as the material become more conductive, such that copper is the most condutive material compares to copper, and copper compared to plastic shows low conductivity.17. Styrofoam is a mixture of plastics and hence is an insulator such that Q(dot) can be 0 in an ideal system. So it can conduct better than plastic such that it should be above plastic due to the insulation properties.Suppose a sample of gas is composed of 100 molecules, with speeds given below. Speed (m/s) Number 200 23 400 42 600 26 800 8 1000 1 According to the kinetic molecular theory, if the absolute temperature of the gas is halved, what is a reasonable estimation of the new distribution of speeds of the molecules
Answer:
The answer is:
[tex]speed(\frac{m}{s}) \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ (number)\\\\ 100 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 23 \\\\ 200 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 42 \\\\ 300 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 26 \\\\ 400 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 8 \\\\ 500 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 1 \\\\[/tex]
Explanation:
Its total kinetic energy of a gas colloquial atom colloction is equal to absolute temperature alone, according to the programs that directly gas Theory.
Average speed for 1st option:
[tex]= \frac{(200 \times 23)+(400 \times 42)+(600 \times 26)+(800 \times 8) +1000}{100} \\\\= 444\ \frac{m}{s} \ \ \ \ \ \ \ \ \ \text{average speed of gas}[/tex]
Average speed for 2nd option:
[tex]= \frac{(200 \times 11) +(400 \times 21)+ (600 \times 13)+ (800 \times 4)}{11+21+13+4} \\\\= 440 \ \frac{m}{s}[/tex]
Average speed for 3rd option:
[tex]= \frac{(200 \times 43) +(400 \times 50)+ (600 \times 7)}{100} \\\\ =328 \ \frac{m}{s}[/tex]
Average speed for 4th option:
[tex]= \frac{(200 \times 50) +(400 \times 25)+ (600 \times 13)+(800\times 8)+(1000 \times 4)}{100}\\\\ =382\ \frac{m}{s}[/tex]
Average speed for 5th option:
[tex]= \frac{(100 \times 23) +(200 \times 42)+ (300 \times 26)+(400\times 8)+500}{100}\\\\ =222 \ \frac{m}{s}[/tex]
The average speed also increased by half because the temperatures had kinetic energy.[tex]\to 444 \ \frac{m}{s}\ to \ 222 \ \frac{m}{s}[/tex]
In the following pair, determine whether the two represent resonance contributors of a single species or depict different substances. If two structures are not resonance contributors, explain why. Select the single best answer.
N-N ≡ N: and N=N=N:
Answer:
They are resonance contributors
Explanation:
Resonance structures are structures that differ only in the distribution or placement of electrons.
Considering the two structures, we can easily see that the two species have the same total number of bonds and electrons differing only in the distribution of these electrons.
Hence, they are resonance contributors.
Explain why an empirical formula alone cannot be used to derive the actual molecular formula for a given compound. Provide one or more examples.
Answer:
Because an empirical formula only shows the most simple ratio between elements in a compound while the molecular formula gives the actual number of each element in a certain molecule. Take the example of glucose. It has a molecular formula of [tex]C_6H_{12}O_6[/tex]. However, the smallest ratio between the atoms are 1:2:1 respectively. So the empirical formula would be [tex]CH_2O[/tex]. Clearly not representing the molecular formula.
Explanation:
What is the outer layer of the suns atmosphere?
can u pls help me with this question
Xander is gaining weight. Which best describes what he can do to prevent obesity? exercise every day and also make healthy choices in his diet excercise once a week but make no change in his diet exercise once a week and also make healthy choices in his diet exercise every day but make no change in his diet
Answer:
exercise every day and also make healthy choices in his diet
Explanation:
This is going to prevent Xander from getting more overweight and will help him lose some pounds.
This is also something I need to do lol
<3
Answer:
A
Explanation:
Exercise every day and also make healthy choices in his diet
what would be a logical explanation for why carbon dioxide increased over the time shown in the graph.
A. the area of land for crops incresed
b. the amount of plants eaten by animal increased
c. the amount of fossil fuels being burned increased
d. the amount of wood being burned by pepole increased
Answer:
c. the amount of fossil fuels being burned increased
Explanation:
Carbon dioxide gas concentration increased over the time due to burning of fossil fuels increased. Fossil fuels are organic compounds which releases carbondioxide gas as a result of burning of fossil fuels in the engines of vehicles and industries. With the passage of time, number of vehicles increases in the world which needs more fossil fuels and due to burning of that fossil fuels, more carbondioxide gas is released.
A covalent bond forms when
The first stage of aerobic respiration is a series of biochemical reactions called the Calvin cycle.
True
False
Answer:
The answer is indeed true
Explanation:
can u pls help me with this question
Answer:
A. liquid to gas
I need help as soon as possible
Answer:
D
Explanation:
Which statement best describes the availability of nonrenewable energy resources?
O Their supplies will be completely used up within ten years.
O They are readily available in all countries.
O Their exact amounts are not currently known.
They are stored in primary forests around the world.
Answer:
C. Their exact amounts are not currently known.
Explanation:
The statement that best describes the availability of nonrenewable energy resources is that their exact amounts are not currently known.
What are non-renewable sources of energy?Non-renewable sources of energy are those sources that are subject to exhaustion from usage i.e. cannot replenish itself.
Non-renewable sources unlike their renewable counterparts are exhaustible because they don't replenish themselves over a short time.
Examples of non-renewable sources of energy are:
PetroleumcoalTherefore, the statement that best describes the availability of nonrenewable energy resources is that their exact amounts are not currently known.
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Draw the full structures of these compounds and identify the functional groups.
a) CH2=CHCONH(CH2)2CN
b) EtO2CCH2OCOEt
Answer:
See attached picture.
Explanation:
Hello!
a) In this case, since oxygen there is present as C=O, as shown on the attached picture, we can see the following functional groups:
- Double bond (alkene).
- Amide group.
- Nitrile group.
b) In this case, since Et suggest an ethyl radical (CH3-CH2-) and the presence of those 2 oxygen atoms accounts for carboxyl, we have:
- Two carboxyl groups for an ethyl propanedioate ester.
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