Answer:
The first one and the last one.
Explanation:
Carbon dioxide is generated by cellular respiration and released into the atmosphere.
Photosynthesis makes oxygen that plants can release into the atmosphere.
All of the following explains why solar energy a better source of energy except:
Solar energy produces less toxic gas in the atmosphere.
Solar energy can be mined with less damage to ecosystems.
There is less environmental impact when collecting solar energy.
Solar energy is unlimited and easily captured from the Sun.
Answer:
Solar energy can be mined with less damage to ecosystems
Explanation:
solar energy isint mined, its collected and it is kinda bad for the environment when you mine the metals to get the solar panel
2. Two glasses full of water are left out on a table over
night. Both glasses have a diameter of 10
centimeters, but one is twice as tall as the other.
Which glass do you expect to lose more liquid to
evaporation in a short amount of time?
A.The taller glass
B.The shorter glass
C.They both lose the same amount
D.No evaporation takes place
Answer: C
Explanation: The evaporation rate depends on the exposed surface of liquid as long as both glasses stay at the same temperature. Since both glasses have the same surface area, they should both evaporate at the same rate.
Which of the following has the LONGEST wavelength
A.) a lion growling at a frequency of 85 Hz
B.) a bass guitar playing a note at a frequency of 150 Hz
C.) a man speaking at a frequency of 520 Hz
D.) an opera singer singing at a frequency of 2100 Hz
Answer:
D.) an opera singer singing at a frequency of 2100 Hz
Explanation:
Wavelength is inversely proportional to frequency.
The one having the LONGEST wavelength is a lion growling at a frequency of 85 Hz and the correct option is option A.
What is Electromagnetic scale?The electromagnetic spectrum is a range of frequencies corresponding to wavelengths which are a few kilometres to a fraction of the size of an atomic nucleus in the spectrum of electromagnetic waves.
As a wave, light has several basic properties that describe it. One is frequency, which counts the number of waves that pass by a given point in one second.
Another is wavelength, the distance from the peak of one wave to the peak of the next. These properties are closely and inversely related: The larger the frequency, the smaller the wavelength — and vice versa.
A third is energy, which is similar to frequency in that the higher the frequency of the light wave, the more energy it carries.
Therefore, The one having the LONGEST wavelength is a lion growling at a frequency of 85 Hz and the correct option is option A.
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How many grams of solid iron will be produced from 32.1 grams of iron (III) oxide? Hint: Balance the equation first
Answer:
22.45g of Fe will be produced
Explanation:
The balanced reaction is:
Fe₂O₃(s) + 3CO(g) → 2Fe(s) + 3CO₂(g)
Where 1 mole of Iron (III) oxide reacts with 2 moles of Iron
To solve this question we have to find the moles of iron (III) oxide. With these moles and the balanced reaction we can find the moles of iron produced and its mass:
Moles iron (III) oxide -Molar mass: 159.69g/mol-
32.1g Fe₂O₃ * (1mol / 159.69g) = 0.201 moles Fe₂O₃
Moles Iron:
0.201 moles Fe₂O₃ * (2mol Fe / 1mol Fe₂O₃) = 0.402 moles of Fe
Mass Fe -Molar mass: 55.845g/mol-
0.402 moles of Fe * (55.845g/mol) =
22.45g of Fe will be produced4.6 moles of a gas are at a temperature of 325 K and a volume of 96.8 L, what is the pressure of the ga
Answer:
1.3 atm
Explanation:
Apply the ideal gas law: PV = nRT
Since we need to find the pressure, solve for pressure:
P = nRT / V
Plug in our given values of n = 4.6 moles, R = 0.08206 (ideal gas law constant using atm), T = 325 K, and V = 96.8 L:
P = 4.6(0.08206)(325) / 96.8 = 1.267 atm -> 1.3 atm (two significant figures)
Glaciers contain most of the freshwater on earth. True or false! Please help me out
Why is knowing where volcanoes and earthquakes occur important?
Please help!!!!!
Which event is an example of condensation?
"Fog forms in a valley", a physical process called condensation occurs when a gas or vapour transforms into a liquid state.
Which of the following example of condensation?On a chilly soda can, water gathers. As the air cools around the container, water vapor in the atmosphere reaches its dew point and condenses into liquid droplets. Condensation is the conversion of water vapor into liquid. On the outside of a chilly glass or container, water vapor condenses and turns into liquid water (sweat).
What three condensation reactions are examples?Aldol condensation, Knoevenagel condensation, Claisen condensation, and Dieckman condensation (intramolecular Claisen condensation) are a few examples of common condensations that produce alcohols as a by-product.
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how to calculate density (what’s the formula)
density=_ divided by _
Answer:
density equals weigt divided by volume
Explanation:
[tex]density = \frac{m}{v} [/tex]
The following are properties of metals except:
1
Conducts electricity
2
Gas at room temperature
3
High lustre
4
Ductile
2 because metals are solid at room temperature
Answer:
Except 2- gas at room temperature
Explanation:
Which of the following is a property of elements?
O
Elements have at least two different types of atoms.
Elements have their own individual characteristic properties.
Elements are can be separated from one another.
Elements have the ability to change into a different element.
A thermite reaction realeses large amounts of heat and light resulting in the melting of the iron metal
Answer:
1. Fe₂O₃ : Al = 1 : 2
2. Fe₂O₃ : Al₂O₃ = 1 : 1
3. Fe₂O₃ : Fe = 1 : 2
Note: The question is incomplete. The complete question is given below :
A thermite reaction releases large amounts of heat and light, resulting in the melting of the iron metal that forms during the reaction. The balanced chemical equation is given below: Fe₂O₃(s) + 2Al(s) ---> Al₂O₃(s) + 2Fe(l) Determine the correct mole ratios for the following substances, based on this chemical equation.
Explanation:
A thermite reaction is a highly exothermic reaction that occurs between a mixture of powdered aluminium and iron (iii) oxide.
The reaction is a redox reaction which produces aluminium oxide and metallic iron.
The heat given out in the reaction melts the iron formed. It is used to join railway tracks or cracked machine parts. The molten iron runs down between the tracks and welds them together.
The balanced equation of the reaction is given below :
Fe₂O₃(s) + 2Al(s) ---> Al₂O₃(s) + 2Fe(l) + Heat
The mole ratio of the reactant and products are as follows:
1. 1 mole of Iron (iii) oxide and 2 moles of aluminium are combined
Fe₂O₃ : Al = 1 : 2
2. 1 mole of aluminium oxide is produced from 1 mole of iron (iii) oxide
Fe₂O₃ : Al₂O₃ = 1 : 1
3. 2 moles of of iron are produced from 1 mole of iron (iii) oxide
Fe₂O₃ : Fe = 1 : 2
According to the law of conservation of matter, the number of_______is not changed by a chemical reaction
A. Molecules
B. bonds
C. products
D. atoms
Answer:
Atoms
Explanation:
According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.
Sublimation is snow or ice changing to a gas without melting. What must happen to the molecules for this to happen?
Answer:Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water.
Explanation:
Order the terms according to the path followed by oxygen during cellular respiration.
Answer:
Outside air
Nose
Lungs
Bloodstream
Cell
Explanation:
We breathe in oxygen from the outside air in through our nose and it travels to our lungs. Inside our lungs, we have Avioli's that diffuse oxygen into our bloodstream and the bloodstream helps the oxygen travel into our cells.
Hope this helps :)
Respiration is the process of exchange of gases between the cell and atmosphere. The path of respiration involves Outside Air⇒ Nose⇒ Lungs⇒ Bloodstream⇒ Cell.
What is respiration?Respiration is the movement of oxygen from the outside environment to the cells and the removal of carbon dioxide from the cells into the outside environment.
Respiration is of two types depending upon the presence of oxygen:
1. Aerobic Respiration: This takes place in the presence of oxygen
2. Anaerobic Respiration: This takes place in the absence of oxygen.
The path of respiration includes inspiration of outside air into the nose, through the nostrils this air is passed on to the lungs. The alveoli is the site of gaseous exchange in the lungs. In the lungs, oxygen is inspired and carbon dioxide is expired.
The oxygen gas which is inspired by the lungs is dissolved in the blood. Oxygen forms a complex with the hemoglobin protein present in the blood. This blood is then circulated to all the cells and tissues of body. Thus, the oxygen is supplied to all the cells and tissues. The path includes Outside Air⇒ Nose⇒ Lungs⇒ Bloodstream⇒ Cell.
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How many moles are in 3.4*10²⁶ molecules of H2O?
Answer:
564.5027395 moles
Explanation.
a mole is 6.023×1023
(3.4×10^26)÷(6.023×10^23)= 564.5027395
If an atom of Phosphorous has 17 neutrons, what is its mass number?
a) 31
b) 32
c) 15
D) 17
Please answer all questions on sheet
Answer:
Yes you always only see one side of the moon
The moon flag always points towards earth
It take 1 month for the moon to orbit the earth
It takes 29.5 days for the flag to rotate once in a full circle
What does pH measure?
A. the density of a solution
B. the salt concentration of a solution
C. the sulfate ion concentration of a solution
D. the hydronium ion concentration of a solution
Answer:
Option D
Explanation:
Hydronium ion concentration is a measure of pH of a solution.
The mathematical equation for the same is [H3O+] = 10-pH
OR
[H3O+] = antilog (- pH)
Hence, option D is correct
A volcano has no ____
only heat.
Answer:
A volcano has no friends only heat.
Explanation:
What is tugror pressure ,what causes it,and what does it do for a plant?
Answer:
Explanation:
Turgor pressure is the pressure forced or in other words, exerted onto the cell wall of the plant. It's caused by the movement of water into the cell. This causes the water to rush and burst into the cell, which increases the pressure onto the cell wall. Due to that, cell swells up, which helping the plant to stand upright and straight.
Hope this helps
Answer:
Turgor pressure is the pressure exerted on the cell wall of a plant. It is caused by the movement of water into the cell. ... This causes water to rush into the cell, increasing the pressure on the cell wall. The cell swells up, helping the plant to stand upright.
the mass of a subatomic particle compared to the mass of a proton
Answer:
neutron
Explanation:
Hopefully this will help you!!!!
Can someone help me please I am doing a test!!.
Your lips are more sensitive to touch than your forehead. What is different about the touch receptive fields in the lips compared to the forehead?
(Mark the one best answer.)
A There are more touch receptive fields in the lips.
B The touch receptive fields are bigger in the lips.
C The touch receptive fields are more sensitive in the lips.
D The touch receptive fields are used more often in the lips
Answer:
c i think
Explanation:
For the following reactions, predict the products, phases, and balance the chemical reactions,
6)
NaBr (aq) +
H3PO4 (aq) →
To try and stimulate the correct distance, how close would you put the animal
representing the electron?
its out of
Select one
Here's link to the answer:
bit.[tex]^{}[/tex]ly/3a8Nt8n
Answer: out in the parking lot
Explanation:
Will mark brainly
ASAP
TRy to solve both pls
Answer:
1. i think its II or III
2. air
Explanation:
Nate measured an iron bar. He put the iron bar in the hot sun. When he measured the bar after it had been in the sun, it was slightly longer. Which sentence best describes what happened to the iron atoms after the bar was left in the hot sun?
Consider what happens to an iron bar when left out and exposed to sunlight and why it happens.
Evaluate the statements and select the one that best represents what happens.
Provide your reasoning in the text box provided.
The number of atoms increased.
The size of the atoms increased.
The space between each atom increased.
The air in the spaces between the iron atoms expanded.
Answer:
need dim points back ma boi
Explanation:
El acido nitrico se obtiene industrialmente por oxidacion de amoniaco (nh3), de acuerdo con la ecuacion: 4nh3 + 702 - h2o + hno2 + 2hno3 ¿ cuanto acido nitrico del 90% de pureza se podra obtener a partir de 1.36 kg de amoniaco?
Answer:
2800 g de ácido nítrico
Explanation:
La ecuación por la oxidación de amoniaco es:
4NH₃ + 7O₂ → 4H₂O + 2HNO₂ + 2HNO₃
Si pensamos que el oxígeno es el reactivo limitante, trabajamos con el amoniaco. Convertimos su masa a moles:
1.36 kg = 1360 g
1360 g . 1mol /17g = 80 moles
Si 4 moles de amoniaco pueden producir 2 moles de acido nítrico
80 moles producirán, (80 . 2)/4 = 40 moles.
Convertimos los moles a gramos:
40 mol . 63g /mol = 2520 g
Si le aplicamos la pureza
2520 g . 100/90 = 2800 g
what device has made car emissions much cleaner?
automatic transmission
better wheels
tail pipes
catalytic converters
Answer:
automatic transmission
Explanation:
An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in motor vehicles that does not require any driver input to change gears under normal driving conditions.
How many atoms of gallium are there in a sample of gallium that has a mass of 1.34g?
Answer:
Explanation:
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