Two astronauts are in outer space; hank is inside the space shuttle & the other, sally, is on a space walk. A large meteor hits the space shuttle, but only one of the two astronauts are able to hear it. Which astronaut is able to hear the impact & which isn’t. Explain why. Be sure to include the terms: medium and transfer in your explanation.
Answers
Answer:
Sally would not be able to hear the impact of the meteor because sound waves cannot travel through the vacuum of outer space. In order for sound to be heard, it must vibrate through a medium such as air, water, or solid matter. Since there is no air or other medium in outer space, sound waves cannot transfer through it and cannot be heard. Hank, on the other hand, would be able to hear the impact of the meteor because he is inside the space shuttle, which provides a solid medium for the sound waves to vibrate through and be transferred to his ear drums.
Related Questions
What two types of matter are closest in
density? How do you know?
ings.
Answers
Answer:
Density: The molecules of a liquid are packed relatively close together. Consequently, liquids are much denser than gases. The density of a liquid is typically about the same as the density of the solid state of the substance.
In a gas, the distance between molecules, whether monatomic or polyatomic, is very large compared with the size of the molecules; thus gases have a low density and are highly compressible. In contrast, the molecules in liquids are very close together, with essentially no empty space between them
I hope it helps you
Energy is inversely proportional to the wavelength of a wave. Which would have the GREATEST energy? A wave with a wavelength of ______ meters
A.) 15
B.) 10
C.) 20
D.) 5
Answers
Energy is inversely proportional to the wavelength of a wave. Which would have the GREATEST energy. A wave with a wavelength of 5 meters.
The relationship between wavelength and energy is given as :
E = hf
E = h c / λ
where,
E = energy
h = Planck constant
c = speed of light
λ = wavelength
So, energy is inversely proportional to wavelength, therefore, the wave having least amount of wavelength will have greatest amount of energy. So, according to the given value . the wavelength 5 m will have greatest energy.
Thus, Energy is inversely proportional to the wavelength of a wave. Which would have the GREATEST energy. A wave with a wavelength of 5 meters.
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In your own words, describe the rock cycle including its processes and the formation of different rock types
Answers
Answer:
That’s a question on school- what- I-
Explanation:
topic:
surface area
(multiple choice)
irrelevant answers will be reported
Answers
Question 4 - lower
Question 5 - yes
Sorry if any of these are wrong but im pretty confident in the answers
How many grams of water are formed when 250g of ethane combusts with 300 g
of oxygen?
Round to the nearest whole number
Answers
450 grams of water are formed when 250g of ethane combusts with 300 g of oxygen.
Combustion, or burning, is a high-temperature exothermic redox chemical response among a fuel and an oxidant, generally atmospheric oxygen, that produces oxidized, frequently gaseous products, in a mixture termed as smoke.
calculation:-
C₂H₆ + 7/2O₂ => 2CO₂ + 3H₂O
30 gram of ethane produce = 54 gram of water
250 gram of ethane produces = 54/30 × 250
= 450 grams of water
Combustion, a chemical reaction between materials, commonly consisting of oxygen and typically observed by way of the generation of heat and light in the form of flame. Combustion is the clinical phrase that burns. throughout a combustion response, the fabric reacts with oxygen from the air and contributes energy to the surroundings as light and warmth. the products of the reaction to combustion are referred to as oxides.
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The molar mass of MgBr2 is 184.11 g/mol.
How many moles are in 500 g MgBr2? [ ? ] mol MgBr2
Answers
There are 2.716 moles are present in 500 gm of MgBr₂
What is molar mass?The mass of a sample of a chemical compound is divided by the quantity of that substance, or the number of moles in the sample, measured in moles, to obtain the compound's molar mass in chemistry.
MgBr₂ is known as Magnesium bromide.
It is given that, Magnesium bromide of molar mass = 184.11 g/mol
As we know,
184.11 gm Magnesium bromide contains 1 mol
So, 500 gm Magnesium bromide contains 500 ÷ 184.11 = 2.716 mol
Thus, 2.716 moles are present in 500 gm of MgBr₂
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2. Se combinan 40 g de SO2 y 25 g de O2 determine el porcentaje en masa del exceso con respecto a su masa inicial. P.A. (S = 32; O = 16) SO2 + O2 SO3
Answers
Answer:
60%
Explanation:
En la reacción:
2SO₂ + O₂ → 2SO₃
Donde 2 moles de SO₂ reaccionan por mol de O₂.
El peso atómico del SO₂ es:
1S = 32g/molₓ1 = 32g/mol
2O = 16g/molₓ2 = 32g/mol
SO₂ = 32g/mol + 32g/mol = 64g/mol
Y el peso atómico de O₂ es:
2O = 16g/molₓ2 = 32g/mol
Las moles de SO₂ y O₂ son:
SO₂: 40g ₓ (1mol / 64g) = 0.625 moles
O₂: 25g ₓ (1mol / 32g) = 0.7813 moles
Para una completa reacción de SO₂ se necesitan:
0.625 moles SO₂ ₓ (1mol O₂ / 2 mol SO₂) = 0.3125 moles de O₂
Así, las moles en exceso de O₂ son:
0.7813 moles - 0.3125 moles = 0.4688 moles O₂
En gramos:
0.4688 moles O₂ ₓ (32g / mol) = 15g O₂ están en exeso.
El porcentaje en exceso es:
15g / 25g ₓ 100 =
60%Which electron i, on average, farther from the nucleu: an electron in a 5d orbital or an electron in a 4d orbital?
Answers
According to Aufbau Principle electrons are to be filled in a pattern that is, starting from lower-energy atomic orbitals electrons will be filling into the higher-energy orbitals.
So, electrons will be filled in the 4d orbital before 5d orbital.
Also the electron in 4d orbital will lie closer to the nucleus as compared to the electron in the 5d orbital.
as the principle quantum number for the electron in 4d orbital is 4, which means the electron is present in shell 4, i.e. n=4.
Whereas, the principle quantum number for the electron in 5d orbital is 5, which means the electron is present in shell 5, i.e. n=5.
If we see Neil Bohr's atomic model,
Electrons in 4th shell will be closer to the atomic nucleus than that of electron in 5th shell.
For clarification, you can see the figure.
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What is Acid Rain? How does it affect aquatic life?
Answers
Answer:
Acid rain causes a cascade of effects that harm or kill individual fish, reduce fish population numbers, completely eliminate fish species from a waterbody, and decrease biodiversity. As acid rain flows through soils in a watershed, aluminum is released from soils into the lakes and streams located in that watershed
Explanation:
Answer:
Expert Verified AnswerExplanation:
Acid rain is a type of rain with a pH level lower than 5.6, which is caused by emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) from power plants, factories, and vehicles. When these emissions react with the atmosphere, they form sulfuric acid and nitric acid, which can then fall to the ground as acid rain.
Acid rain can have significant impacts on aquatic life, including:
Altering the pH levels of lakes, rivers, and streams, making it more acidic and harmful to aquatic plants and animals.
Harming the gills of fish and other aquatic animals, making it more difficult for them to breathe.
Dissolving the protective outer layer of the shells of snails, clams, and other aquatic animals, making them more vulnerable to predators.
Killing off the phytoplankton and other microscopic organisms that form the base of the aquatic food chain, which can have a cascading effect on the rest of the ecosystem.
Destroying the habitats of many aquatic species by breaking down rocks, soils, and other natural materials.
Overall, acid rain can have a significant and lasting impact on the health and survival of aquatic ecosystems and the species that depend on them.
Which of the following acids (listed with pKa values) and their conjugate base would form a buffer with a pH of 8.10? A) HC2H302, pka= 4.74 B) H2SO3, pKa= 1.77 C) HCIO, pka= 7.54 D) HIO. pka= 10.64 E) HNO2. pka= 3.34
Answers
HClO and its conjugate base (ClO-) would form a buffer with a pH of 8.10.
To form a buffer with a pH of 8.10, we need an acid and its conjugate base that have a pKa value close to 8.10. The Henderson-Hasselbalch equation tells us that the pH of a buffer is determined by the pKa of the acid and the ratio of its conjugate base to acid. The ratio of the conjugate base to acid should be close to 1 to have an effective buffer.
Option C) HCIO, pka= 7.54, and its conjugate base CIO- would form a buffer with a pH of 8.10. The difference between the pKa value and the desired pH is small, and the ratio of CIO- to HCIO would be close to 1 at this pH. Therefore, option C is the correct answer.
The other options have pKa values that are too low or too high to form a buffer with a pH of 8.10. For example, option A has a pKa of 4.74, which is too low for a buffer with a pH of 8.10. Its conjugate base, C2H3O2-, would be too weak to maintain the buffer. Similarly, option D and E have pKa values that are too high for a buffer with a pH of 8.10. Their conjugate bases, IO- and NO2-, would be too strong to maintain the buffer. Option B has a pKa value that is also too low, and its conjugate base, HSO3-, would be too weak to maintain the buffer.
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Which of the following are functions of the stomach?
Answers
Answer:
1-Temporarily store food.
2-Contract and relax to mix and break down food.
3-Produce enzymes and other specialized cells to digest food
En una planta de energía, se produce CO2 gracias a la reacción de combustión del material orgánico con oxígeno para producir CO2, SO2, SO3, NO, NO2 y H2O que son los causantes del efecto invernadero, el SO2 reacciona con H2O para formar H2SO3, causante de la lluvia ácida. En condiciones de gas ideal el SO2 se encuentra a una temperatura de 100°C y 0,5 atm de presión, el volumen ocupado generalmente es de 25 L. 5. La ecuación para hallar el número de moles debe ser: a. Gases ideales: relación entre todas las variables que influyen sobre los gases b. Boyle: relación entre volumen y presión c. Charles: relación entre el volumen y la temperatura d. Gay Lussac: relación entre la presión y la temperatura
Answers
Answer:
a. Gases ideales: relación entre todas las variables que influyen sobre los gases
Explanation:
La ecuación del gas ideal da la relación entre las variables; presión, volumen, temperatura y número de moles.
Según la ecuación del gas ideal; PV = nRT
P = presión del gas
V = volumen del gas
n = Número de moles del gas
R = constante de gas
T = temperatura del gas
El número de moles de SO2 se obtiene de;
n = PV / RT
n = 0,5 * 25 / 0,082 * 373
n = 12,5 / 30,586
n = 0,41 moles
For the following questions, use the reaction N02(0) -> JN2(9) + 02(9), with AH = -33.1 kJ/mol
and AS = 0.06302 kJ/(mol K).
Draw a possible potential energy diagram of the reaction. Label the enthalpy of the reaction.
Answers
The potential energy diagram for the reaction N02(0) -> JN2(9) + 02(9) should be a curve that descends from reactants to intermediates and then ascends to products, with a label indicating that ΔH = -33.1 kJ/mol.
A potential energy diagram of a reaction is a graph that demonstrates the progress of a reaction and the changes in potential energy that occur over time. The vertical axis of the diagram shows potential energy, and the horizontal axis shows reaction progress. Reactants are shown on the left, intermediates are shown in the middle, and products are shown on the right. The reaction pathway is depicted with a curve that descends from reactants to intermediates and then ascends to products. Labeling the enthalpy of a reaction involves identifying its enthalpy change. The enthalpy change (ΔH) of a reaction is the heat absorbed or given off by the system at a constant pressure. The reaction N02(0) -> JN2(9) + 02(9) has ΔH = -33.1 kJ/mol. The reaction is exothermic because the enthalpy change is negative.
The potential energy diagram for this reaction should be a curve that descends from reactants to intermediates and then ascends to products. The enthalpy change should be labelled in the diagram. If the enthalpy change is negative, then it should be labelled as a negative value. If the enthalpy change is positive, then it should be labelled as a positive value.
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The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25.0 mg sample of cesium-137 to 9.38 mg?
Answers
Answer:
t = 42.4 years
Explanation:
To find the amount of time needed for the sample to decay, you need to use the half-life equation:
\(N(t) = N_0(\frac{1}{2})^{t/h}\)
In this equation,
-----> N(t) = final mass (mg)
-----> N₀ = initial mass (mg)
-----> t = time passed (yrs)
-----> h = half-life (yrs)
You can find how much time passed by plugging the given variables into the equation and solving for "t". The final answer should have 3 sig figs like the given values.
N(t) = 9.38 mg t = ? yrs
N₀ = 25.0 mg h = 30.0 yrs
\(N(t) = N_0(\frac{1}{2})^{t/h}\) <----- Half-life equation
\(9.38mg = 25.0mg(\frac{1}{2})^{t/30.0yrs}\) <----- Insert variables
\(0.3752 = (\frac{1}{2})^{t/30.0yrs}\) <----- Divide both sides by 25.0 mg
\(ln(0.3752) = ln((\frac{1}{2})^{t/30.0yrs})\) <----- Take the natural log of both sides
\(ln(0.3752) = \frac{t}{30.0yrs} ln(\frac{1}{2})\) <----- Rearrange the exponent
\(-9.803 = \frac{t}{30.0yrs} (-0.6931)\) <----- Solve the natural logs
\(1.1414= \frac{t}{30.0yrs}\) <----- Divide both sides by -0.6931
\(42.4 yrs= t\) <----- Multiply both sides by 30.0 yrs
A wooden plank has a mass of 100kg force of 20 n was used to move it what is its acceleration
Answers
Answer:
a= 0.2m/s²
Explanation:
Fnet = ma
20 = 100a (divide both sides by 100)
a = 0.2m/s²
A wooden plank has a mass of 100 kg force of 20 Nwllhave the acceleration of 0.2 m/s².
What is Acceleration ?Acceleration is the rate of change of the velocity of an object with respect to time.
Accelerations are vector quantities.
The orientation of an object's acceleration is given by the orientation of the net force acting on that object.
We know,
F= ma ,
where
F is force , M is mass , A is acceleration.For 100kg ,
20 = 100 x A
A = 20/100
A = 0.2 m/s².
Therefore, A wooden plank has a mass of 100 kg force of 20 Nwllhave the acceleration of 0.2 m/s².
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please, please, please help! this assignment is due in a few mins and idk what to do. I will mark the first/best answer brainliest! Why do substances exist as a solid, a liquid, or a gas?
Answers
Answer:
Explanation:
The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid
what is the density of an object with a height of 1 and a mass of 36
Answers
you will divide 36 by 1 and multiply 2 on both sides which makes 72 by 2 so 2into 1 is 2 and 2 into 36 is 72
Which law in science uses addition?
Answers
Answer:
Scientific laws can be written as mathematical equations, so they are called quantitative. However, there aren't very many laws in biology. They are more common in physics and chemistry.
Explanation:
If you travel 152,758,000,000 cm' how many mº did you travel?
Answers
Answer:
1527580000 (I think if I did it right sorry if I didn't)
Explanation:
When converting cm to m. 1 centimeter is 0.01 Meters. That explanation probably doesn't help at all but I hope this is right and if not I do apologise!
A olvent i found to be 50. 0% oxygen, 37. 5% carbon, and 12. 5% hydrogen. What i the empirical formula of thi olvent
Answers
The empirical formula of the solvent is CH4.
Relative number of atoms
Of H= 25/1 = 25
Of C= 75/12 = 6.25
What is a solvent?
Solvents are a heterogeneous group of structurally different chemicals that can be used to dilute, dissolve, or disperse other compounds. The ability of a solvent to dissolve another molecule depends on the molecular structure and physical properties of both the solvent and the solute. Solvents can be categorized as organic or inorganic and in terms of chemical polarity. Polar solvents include water, alcohols, and other chemicals containing –OH, such as acetic acid, which have the ability to donate H+ and form hydrogen bonds. Polar solvents lacking the –OH group, including acetonitrile, dimethylformamide, and dimethylsulfoxide, are protophilic solvents and are used to dissolve less polar solutes.To know more about solvents and solutes, click the link given below:
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Help please will give 20 points.Which stage of metamorphosis starts when a caterpillar egg hatches? a Adult b Larva c Nymph d Pupa
Answers
Answer:
The answer is B a larva
Explanation:
Answer:
B. Larva
Explanation:
it is when a catipliar hatches
ow many moles of the precipitate, agcl (s), will form if 9.11 g of cacl2 is used to react with excess amounts of agno3? the molar mass of cacl2 is 110.98 g/mol. report the answer to the second decimal place. the balanced chemical reaction is : 2agno3 (aq) cacl2 (aq) ⟶2 agcl (s) ca(no3)2 (aq)
Answers
By using the no. of moles, the mass of AgCl formed is determined to be 23.50g.
The mass of a material that includes the substance's particles is referred to as a mole.
The number of moles of a material equals to the ratio of its given mass to the mass of one mole of that substance in a chemical reaction. A mole / the no. of moles of any substance is equal to Avogadro's number, which is 6.023 x \(10^{23}\). Additionally, no. of moles is employed to represent concentration measurements like mole per liter and molecular weight.
\(2AgNO_3 (aq) + CaCl_2 (aq) \rightarrow 2AgCl (s) + Ca(NO_3)_2 (aq)\)
Since \(AgNO_3\) is in excess, the amount of product formed will be decided by the quantity of \(CaCl_2\), which is the limiting reagent.
1 mole of \(CaCl_2\) produces 2 moles of AgCl
No. of moles of \(CaCl_2\) = mass of \(CaCl_2\) / molar mass of \(CaCl_2\)
No. of moles of \(CaCl_2\) = 9.11 / 110.98 = 0.0820 moles
No. of moles of AgCl formed = 2 x 0.0820 = 0.164 moles
Mass of AgCl formed = No. of moles x molar mass
Mass of AgCl formed = 0.164 x 143.3 = 23.5012g
Result:
23.50g of AgCl is formed.
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oxygen has an atomic number of 8 and, most commonly, a mass number of 16. thus, what is the atomic mass of an oxygen atom? oxygen has an atomic number of 8 and, most commonly, a mass number of 16. thus, what is the atomic mass of an oxygen atom? approximately 8 daltons approximately 8 grams approximately 16 daltons approximately 16 grams
Answers
While the atomic mass of oxygen is approximately 16 daltons, its mass in grams would be a different value due to the conversion between daltons and grams using Avogadro's constant.
The atomic mass of an oxygen atom is approximately 16 daltons. Dalton, also known as atomic mass unit (amu), is a unit used to express the atomic and molecular weights of elements and compounds. The atomic mass of an element is determined by the total number of protons and neutrons in the nucleus of its atoms.
In the case of oxygen, it has an atomic number of 8, which indicates that it has 8 protons in its nucleus. The most common isotope of oxygen has a mass number of 16, meaning it has 8 protons and 8 neutrons. Since the mass of a proton and neutron is approximately 1 dalton, the total atomic mass of an oxygen atom with 8 protons and 8 neutrons is approximately 16 daltons.
It is important to note that the atomic mass is not directly equivalent to grams. The atomic mass is a relative scale based on the carbon-12 isotope, where carbon-12 is assigned a mass of exactly 12 daltons.
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Can someone help me!!!!!
Answers
Answer:
Can u somehow make it bigger please?
Explanation:
What volume would 7.83 X 10^3 moles of Nitrogen gas occupy?
Answers
Answer:
29.232 l
Explanation:
6.023x10^23 mole of nitrogen =22.4 l
7.83×10^23 mole of nitrogen =
22.4/(6.023×10^23)×7.83×10^23
=29.232 l
Equation of sodium ethanodiate and potassium manganate (vii)
Answers
Answer:
2MnO 4− (aq) + 16H + (aq) + 5C 2 O 42− (aq) → 2Mn 2+ (aq) + 10CO 2 (g) + 8H 2 O (l)
Explanation:
If wrong, I'm sorry, also let me know
what is a mixture of elements and compounds
Answers
The substance in the image above would be classified as a mixture of elements (option E).
What is a compound and mixture?A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.
On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.
According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.
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How many moles of glycine, C2H5O2N, are in 1.332g of glycine?
Answers
Step 1 - Finding the molar mass of glycine
The molar mass of glycine can be found by multiplying the molar mass of each element by the number of times it appears in the formula and then summing it all up.
For glycine, we find the molar mass of 75.07 g/mol.
Step 2 - Interpreting the meaning of molar mass
The molar mass gives us the total mass of one mole of that substance. Let's take water as an example: its molar mass is 18 g/mol, which means one mole of water would weight 18 g, two moles 36 g and so on.
For glycine, therefore, one mole weights 75.05 g.
Step 3 - Finding the number of moles
To find the number of moles, we can use a very simple formula relating mass (m), molar mass (M) and number of moles (n):
\(n=\frac{m}{M}=\frac{1.332}{75.05}=1.77\times10^{-2}\text{ moles}\)Therefore, there are 1.77*10^(-2) moles in 1.332 g of glycine.
please answer quick
If litmus paper is dipped in an acidic solution, what will happen?
The solution will turn blue.
The solution will turn red.
The paper will turn blue.
The paper will turn red.
Answers
True or False : In a true solution, the solute particles will eventually settle to the bottom of the solution.
Answers
Answer: False
Explanation:
In a true solution, the particles will not eventually settle to the bottom of the solution due to the fact that it is homogenous. Imagine getting a fountain soda at a restaurant and leaving the drink alone. No matter how long you wait, the sugar in the soda isn't going to settle at the bottom of the cup.
False In a true solution, the particles will not eventually settle to the bottom of the solution due to the fact that it is homogenous. Imagine getting a fountain soda at a restaurant.
and leaving the drink alone. No matter how long you wait, the sugar in the soda isn't going to settle at the bottom of the cup. The solute particles in a genuine solution are equally scattered and do not sink to the bottom of the solution. A genuine solution is a homogenous mixture in which the solute particles are so thoroughly dissolved in the solvent that they cannot be seen or separated mechanically. A genuine solution has equally dispersed solute particles throughout it, giving it a homogeneous appearance and content. ettle at the bottom of the cup. The solute particles in a genuine solution are equally scattered and do not sink to the bottom.
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