Answer:
1
Explanation:
What is the balanced equation of Na2S+CuSO4=CuS+Na2SO4?
A 0.50 M solution of H Br is to be poured into a beaker that initially contains 50 g of solid CaCO3. Determine the volume of H Br that will be needed to completely react with the 50 g of solid CaCO3.
Answer:
2 liters of HBr is needed to completely react with the 50 g of salt.
Explanation:
First of all, we determine the reaction:
2HBr + CaCO₃ → CaBr₂ + CO₂ + H₂O
We need to calculate, moles of carbonate in order to state the stoichiometry (1:2)
50 g . 1mol / 100.08g = 0.499 mol
1 mol of salt need 2 moles of acid to react, according to stoichiometry
Then, 0.499 moles of salt, will react with (0.499 . 2)/1 = 0.999 moles
As we have the [HBr], we can calculate the volume.
M = mol/L → we replace → 0.50 mol/L = 0.999 mol /L
L = 0.999 mol/0.50 mol → 1.99 L ≅ 2L
A tornado is formed by _____.
Answer:
wind..........................
Which of the following is
NOT a part of the digestive
system?
A
Mouth
B Esophagus
C Intestines
D
Kidneys
1137 AM
o search
B
Answer:
Kidneys
Explanation:
I learned about it :)
Answer:
DkidneysExplanation:
I hope it helps
Difference between emprical and molecular formula
Answer:
The key difference between empirical and molecular formulas is that an empirical formula only gives the simplest ratio of atom whereas a molecular formula gives the exact number of each atom in a molecule.
Directions: Fill in the blanks with the correct term to complete the statements.
1. Seismic waves are also known as__________
2. When the seismic waves travel deeper into the crust, the quake will__________
3. The waves that travel the fastest are_____________
4. The type of wave that travels only in solid medium is known as______________
5.______________waves, also known as L waves are the slowest waves.
6.____________releases energy that travels through and around the earth
seismic waves.
7._____________are of lower frequency than body waves.
8. One of the types of surface waves is___________which creates more shaking.
9. Primary waves can travel a velocity of
10.___________is the velocity of secondary waves.
who can answer this question correct answer please...get chance point.. and brainlest..
Answer:
1) secondary waves
2)
3) P waves
4)surace waves
Which statement describes vascular plants?
Answer:
A vascular plant is any one of a number of plants with specialized vascular tissue. The two types of vascular tissue, xylem and phloem, are responsible for moving water, minerals, and the products of photosynthesis throughout the plant.
Explanation:
What different about paratisim compared to the other biological relationships such as mutualism,predation, competition, and commensalism
A parasitic organism causes harm to other organisms as a result of the symbolic relationship
The parasite must utilize a host organism that may or may not die as a result of the relationship
The host is neither helped nor hurt by the relationship and interaction with the parasitic organism
Both the parasite and the host are helped by the relationship and interaction with the parasitic organism
Answer:
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed
Symbiosis is a close relationship between two species in which at least one species benefits.
Mutualism is a symbiotic relationship in which both species benefit.
Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected.
Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.
Answer:
B..
Explanation: Internet
Write about similarities and the differences of the plant and animal cell
Answer:
Mark me as brainliest pls
Explanation:
similarities: Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal element
differences: A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. ... Animal cells simply have a cell membrane, but no cell wall.
Think of the different types of reactions you have learned about. How can you tell if they absorb energy or release energy, and at the molecular level, how are they different?
Answer:
Absorbed will be harder to spot than releasing because take this as it's like a tire. A tire will go smaller when it has no air compared to when it has air. But absorbed it the opposite. It gets bigger with more air and etc.
Explanation:
My answer don't copy and paste change it a little.
How can a colorless substance be made visible on a chromatography
Explanation:
s f colourless substances can be followed by the use of fluorescent adsorbents. Ultra-violet light of a wavelength absorbed by the adsorbed substance is employed. The part of the column containing adsorbed substance then appears as a dark band.
HOPE THSI HELPS HAVE A NICE DAY!
Answer:
Colourless substances can be followed by the use of fluorescent adsorbents. Ultra-violet light of a wavelength absorbed by the adsorbed substance is employed. The part of the column containing adsorbed substance then appears as a dark band.
A plane takes 230 passengers from New York to Chicago in 3 hours.
New York and Chicago are 789 miles away from each other. What is the
average speed of the flight in mph?
Answer:263mph
Explanation:
The average speed of the flight in mph is 263 miles per hour.
What is speed?In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval,the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero. Speed is not the same as velocity.
Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph). The average speed is calculated as, distance/time =789/3=263 miles per hour.
Learn more about speed,here:
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HELP!!!!! ILL GIVE BRAILY AND THIS IS 10 POINTSSSSSSSS
Which substance will have the greatest increase in temperature when equal masses absorb equal amounts of thermal energy? (Specific heats are given in parentheses.)
ethyl alcohol (2.43 J/gC)
ammonia gas (2.1 J/gC)
water (4.18 J/gC)
lead (0.46 J/gC)
Answer:
Lead (0.46j/g•C,
Explanation:
because it has the lowest specific heat)
What type of Star is this?
1. Main Sequence
2. Super Giant
3. Giant
4. White Dwarf
Answer:
#3
Explanation:
not sure but it's close to 5,100
According to the Bohr model, what period and group would the element be in on the Periodic Table?
Answer:
Group: 16 Period: 2
Explanation:
There are 8 protons, which determine that the element is Oxygen. Oxygen is in group 16 and Period 2.
PHET Simulator
2. Add a slice of cheese, How many products are made? What are the leftovers?
Answer:
there is 1 leftover because your adding to 1... I think
Explanation:
A 0.25 mol sample of neon gas at 18 °C and 0.799
atm is heated to 49 °C. The new gas pressure is 1.11
atm. What is the change in volume of the neon gas?
Answer: The change in volume is 1.52 L
Explanation:
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = 0.96 atm
V = Volume of gas = ?
n = number of moles
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]18^0C=(18+273)K=291K[/tex]
[tex]V=\frac{nRT}{P}[/tex]
[tex]V=\frac{0.25mol\times 0.0820 L atm/K mol\times 291K}{0.799atm}=7.47L[/tex]
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 0.799 atm
[tex]P_2[/tex] = final pressure of gas = 1.11 atm
[tex]V_1[/tex] = initial volume of gas = 7.47 L
[tex]V_2[/tex] = final volume of gas = ?
[tex]T_1[/tex] = initial temperature of gas = [tex]18^0C=(18+273)K=291K[/tex]
[tex]T_2[/tex] = final temperature of gas = [tex]49^0C=(49+273)K=322K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{0.799\times 7.47}{291}=\frac{1.11\times V_2}{322}[/tex]
[tex]V_2=5.95L[/tex]
The change in volume = (7.47 - 5.95)L=1.52 L
The space occupied by the substance, solution or particle in a system is called volume. The change in volume of the neon gas is 1.52 L.
What is the ideal gas equation?The ideal gas equation is the equation that states the relation between the pressure, volume, temperature, moles and gas constant of the hypothetical gas.
The ideal gas equation of a hypothetical ideal gas can be given as,
[tex]\rm PV = nRT[/tex]
Where,
Pressure (P) of the gas = 0.96 atmThe volume of the gas = VNumber of moles (n) = 0.25 molGas constant (R) = 0.0821 Latm/ KmolTemperature (T) = 291 KFrom the above equation volume can be calculated as,
[tex]\begin{aligned} \rm V &= \rm \dfrac{nRT}{P}\\\\&= \dfrac{0.25 \times 0.0820 \times 291}{0.799}\\\\&= 7.47 \;\rm L\end{aligned}[/tex]
The combined gas equation can be shown as,
[tex]\rm \dfrac{P_{1}V_{1}}{T_{1}} = \dfrac{P_{2}V_{2}}{T_{2}}[/tex]
Where,
The initial pressure of the gas [tex]\rm (P_{1})[/tex] = 0.799 atmThe final pressure of the gas [tex]\rm (P_{2})[/tex] = 1.11 atmThe initial volume of gas [tex]\rm (V_{1})[/tex] = 7.47 LThe final volume of gas [tex]\rm (V_{2})[/tex] = ?The initial temperature of the gas [tex]\rm (T_{1})[/tex] = 291 KThe final temperature of the gas [tex]\rm (T_{2})[/tex] = 322 KSubstituting values in the above equation:
[tex]\begin{aligned}\dfrac{0.799 \times 7.47}{291} &= \rm \dfrac{1.11 \times V_{2}}{322}\\\\&= 5.95 \;\rm L\end{aligned}[/tex]
Volume change of the gas is, [tex](7.47 - 5.95)\;\rm L = 1.52\;\rm L[/tex]
Therefore the change in the volume of the neon gas is 1.52 L.
Learn more about the ideal gas equation here:
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I NEED HELP WIT QUESTION THREE
Answer: 2.00
Explanation:
2 rounded to the nearest hundredth is 2.00
your welcome :)
answers for all three:
1. 4.00
2. 16.04
3. 2.00
what is ocean-ridge?
Answer:
A mid-ocean ridge is a seafloor mountain system formed by plate tectonics. It typically has a depth of ~ 2,600 meters and rises about two kilometers above the deepest portion of an ocean basin. This feature is where seafloor spreading takes place along a divergent plate boundary.
Answer:
A mid-ocean ridge is a seafloor mountain system formed by plate tectonics. It typically has a depth of ~ 2,600 meters and rises about two kilometers above the deepest portion of an ocean basin. This feature is where seafloor spreading takes place along a divergent plate boundary.
I hope it's helpful!
plz help me i swear will mark you brainiest
Answer:
C is the correct answer 35% and 9%
How can you measure the volume of an irregular shaped solid?
Answer:
If the object has an irregular shape, the volume can be measured using a displacement can. The displacement can is filled with water above a narrow spout and allowed to drain until the water is level with the tap. As the irregular object is lowered into the displacement can, the water level rises.
Explanation:
why do reactions go faster at a higher temperature?
Answer:
1. Increasing the temperature increases the average speed of the reactant molecules
2. faster moving molecules in the warm reactants hit each other with more energy
Explanation:
Answer:
Explanation: At higher temperatures the particles can collide more often and with more energy. It makes the reaction take place more quickly.
PLEASE HELP! WILL MARK BRAINIEST IF ANSWERED CORRECTLY.
Ocean water is salty. There are many type of salts (ionic compounds), but the salt that causes most of the saltiness in ocean water is sodium chloride (NaCl). (This is the same chemical as the table salt in your salt shaker.)
Use the concept of polarity to describe in detail how sodium chloride (NaCl) dissolves in ocean water.
Answer:
H2O is a polar molecule
the H is slightly positive and the O is slightly negative so the Na is attracted to the O side of the water molecule and the Cl is attracted to the H side of the water molecule
Explanation:
A sea anemone makes an ideal home for a clownfish. Its poisonous tentacles provide protection from predators and a clownfish makes its meals from the anemone's leftovers. A clownfish can help an anemone catch its prey by luring other fish toward over so that the anemone can catch them. What type of symbiotic relationship do the clownfish and the sea anemone have?
A. mutualism
B. commensalism
C. parasitism
D. consumerism
Answer:
Mutualism
Explanation:
They both benefit from the relationship
The equation for the formation of water from hydrogen gas and oxygen gas is 2H2 +
02 → 2H20. How many grams of water can be made from 64 g of oxygen gas?
72g
180 g
405 g
720 g
Answer:
72g
Explanation:
What gas is taken in by animals in the oxygen cycle?
Answer:
oxygen-carbon dioxide cycle
Animals and plants are connected to each other by the oxygen-carbon dioxide cycle. Plants need the carbon dioxide from animals to live and animals must have the oxygen from plants to survive.
Explanation:
hope this helped !
Which group of organisms make their own food?
autotrophs
humans
heterotrophs
animals
Calculate the number of molecules in 64.5 grams of Nitrogen monoxide, NO
Answer:
N=9.933×10^23
Explanation:
[tex]n = \frac{m}{mr} [/tex]
N=n×la
10. Which of these elements is the most electronetative?
(10 Points)
Nitrogen
Calcium
Bromine
O Aluminum
A catalyst of copper mixed with zinc oxide and alumina is used in industry for this production of methanol. Explain the function of the catalyst.
Answer:Copper oxide + Hydrogen → Copper + Water
Copper sulfate + Zinc → Zinc sulfate + copper
Aluminium + Copper chloride → Aluminium chloride + copper
Copper + Oxygen → Copper oxide
Explanation:
Chemical reactions involves chemical combination of compounds or elements as reactants to form other compounds or elements.
In this case, various reactants given will react exhibiting different types of chemical reactions to form products.
First reaction
Aluminium + Copper chloride → Aluminium chloride + Copper
This is a single displacement reaction in which aluminium which is a more reactive element than copper displaces copper from its salt.
Second reaction
Copper oxide + Hydrogen → Copper + water
It is another example of a single replacement reaction. Hydrogen displaces less reactive metals from their oxide to form water and the metal.
Third reaction
Copper sulfate + Zinc → Zinc sulfate + copper
It is another single replacement reaction.
Zinc is more reactive than copper and therefore replaces copper from its salt solution.
Fourth reaction
Copper + Oxygen → Copper oxide
It is a synthesis reaction.
A synthesis reaction is a reaction in which elements or small compounds combine to form single compound.