Answer:
One mole of SnO2
Explanation:
SnO2(s) + 2H2(g) ------> Sn(s) + 2H2O(l)
In every question that has to do with stoichiometry, the balanced reaction equation is the first step towards obtaining the correct answer because it serves as a guide in solving the question.
From the balanced reaction equation, we have
1 mole of SnO2 reacts with 2 moles of hydrogen gas to yield two moles of water.
The balanced reaction equation represents one mole of SnO2.
Hence the answer.
Consider the redox reaction below. 2 upper A l (s) plus 6 upper H C l (a q) right arrow 2 upper Al upper C l subscript 3 (a q) plus 3 upper H subscript 2 (g). Which statement correctly describes a half-reaction that is taking place? Hydrogen is oxidized from +1 to 0. Chlorine is reduced from –1 to 0. Aluminum is oxidized from 0 to +3. Hydrogen is reduced from 0 to –1.
Answer:
Aluminum is oxidized from 0 to +3
Explanation:
In order to make the question clearer, let me give the reaction equation in terms of chemical symbols. It will aid your understanding of the question posed.
2Al(s) + 6HCl(aq) ----> 2AlCl3(aq) + 3H2(g)
You have to recall that oxidation has to do with increase in oxidation number. A specie is said to be oxidized when the said specie experiences an increase in oxidation number. A reduction on the other hand occurs when a specie undergoes a decrease in oxidation number.
Since the oxidation number of an uncombined element is zero, aluminum has an oxidation number of zero on the left hand side. Over on the right hand side, the oxidation number of aluminium increases to +3. Hence aluminum was oxidized from left to right.
Answer:
Aluminum is oxidized from 0 to +3
Explanation:
How can we keep our voices in tip top shape? Please list the three things we can do to help our voices. Which would you say is most important?
Explanation:
Hydrate, diet, and vocal hygiene. I think hydrating is the most important.
Answer:
1) Exercise it by singing and hitting different notes, however don't go overboard
2) Make sure you don't overuse your voice, as well as trying to rest your voice when you are sick
3) Overall, have healthy habits, like not smoking and drinking a sufficient amount of water. Explanation: good job this year. i know it was hard doing everything online
Help on two science questions please!!
Number 2 I believe is D and number 3 is most likely A
Answer:
2) The clothes picked up opposite charges which caused them to cling to each other.
3) A crinkled-up ball of aluminum foil will conduct the charges and remove the charges from the clothes.
Explanation:
I'm sure. Like pretty sure.
Hope this helped lots and lots,
sincerely, me
!!Help!!Polysaccharides are healthier for the body than mono- or disaccharides are. What choices could you make to increase your consumption of polysaccharides and decrease your consumption of mono- and disaccharides? List at least four choices you could make. (4 points) Starch and cellulose are polysaccharides; sugars of various sorts are mono- and disaccharides.
Answer:
We have to consume starch and cellulose in large amount in order to increase the consumption of polysaccharides which make our body healthier.
Explanation:
Starch is polysaccharide which is made up of many glucose molecules. it is mostly made in the body of plants and when we eat that plant this starch is transferred to our body and our body use it when it is needed while cellulose also made of hundred of glucose molecules but our body is unable to digest it because our body is unable to break the bonds between the monosaccharide of cellulose. It is good for humans due to the presence of high amount of fibers.
Acetic acid is found in significant quantities in
Answer:
Acetic acid is found in significant quantities in Vinegar
Acetic acid is found in large concentration or quantity in the vinegar which acts as a main component of vinegar.
In which material the acetic acid is present in large amount?Acetic acid is the main component of vinegar which contains about 4 - 18% of acetic acid. This acid is used as a food preservative as well as food additive.
So we can conclude that acetic acid is found in large concentration or quantity in the vinegar which acts as a main component of vinegar.
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Which statement explains how commercial land use negatively impacts watersheds?
O Chemicals in fertilizers run off into water and cause algae blooms.
O Production of clothing items makes pollutants that contaminate the water.
O Chemicals from lawn maintenance leach into water and are washed into rivers.
O Motors from boats and wave runners leak fuel pollutants into water and affect fish.
Answer:
Chemicals in fertilizers run off into water and cause algae blooms
Explanation:
Of the answer choices, the ones that have to do with commercial land use are the ones discussing fertilizers. Some commercial land is dedicated to lawn, but commercial farms are a much larger portion of commercial land use. The appropriate choice is, "Chemicals in fertilizers run off into water and cause algae blooms."
please help idk what to do
Answer:
2H and 6N
EXplain
You need one H and three N molecules for one molecule of NH3 for you’ll need 2 H and 6N Molecules to create 2
Answer:2h and 6n
Explanation:
Hope i could help
Unlike a mixture a compound always has:
A: a variable composition
B: a constant composition
C: allotropic composition
D: a metallic composition
an
Answer:
Explanation:
B
Answer:
B:
Explanation:
Which of these makes a source more reliable?
A. if you have cited it correctly
B. if you found the information online
C. if the information is from expert scientists
D. if you are skeptical when you hear new information
A racehorse completes the Kentucky Derby, a distance of 1.25 miles, in
exactly 2.00 minutes. How fast is the horse in kilometers per hour?
A. 0.00647 kilometers per hour
B. 23.3 kilometers per hour
C. 0.0168 kilometers per hour
D. 60.3 kilometers per hour
Answer:
D. 60.3 kilometers per hour
Explanation:
Hello,
In this case, we first compute the miles in kilometres:
[tex]1.25miles*\frac{1.60934km}{1mile} =2.012km[/tex]
Then the minutes in hours:
[tex]2.00min*\frac{1h}{60min}=0.033h[/tex]
Finally, the velocity:
[tex]v=\frac{2.012km}{0.033h}\\ \\v=60.3km/h[/tex]
Thus, answer is D. 60.3 kilometers per hour
Best regards.
The role of chlorophyll during photosynthesis is to
-release carbon dioxide
-reflect light energy
-make ATP
-absorb light energy
Answer:
Absorb light energy
Explanation:
Chlorophyll absorbs light energy which is used to produce carbohydrate and oxygen in the presence of carbon dioxide and water.
How Do Glow Sticks Glow? Explain in 5-6 sentences. IF NOT, YOUR ANSWER WILL BE DELETED
Answer:
All liquid glow products depend on a chemical process known as CHEMILUMINESCENCE to produce their light. Chemiluminesence is a chemical reaction that causes a release of energy in the form of light. To produce this light the electrons in the chemicals become excited and rise to a higher energy level.To utilise this process glowsticks contain two liquids; hydrogen peroxide and tert-butyl alcohol. When mixed together it is these liquids that create the glow. Fluorescent dyes are also used in the alcohol to alter the colour of the light emitted. Chemiluminesence is a chemical reaction that causes a release of energy in the form of light.
Explanation:
Hope It Helps!
It is best to say that electric motors require _______ to work. a. a continuous current b. a galvonometer c. a generator d. energy
Answer:
The answer is a) continous current
how many moles are in 27.5 grams of CaCO3
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CaCO3, or 100.0869 grams.
Explanation:
Acid and base ph PhET simulation lab
Answer:
Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize ... Investigate whether changing the volume or diluting with water affects the pH. ... Original Sim and Translations ... Lab, Chemistry.
What should you do with leftover prescription medication after you
no longer need them?
HOLD ONTO THEM IN CASE YOU NEED THEM IN THE FUTURE
OFFER THEM TO SOMEONE ELSE WHO MAY NEED THE
MEDICATION
PROPERLY DISCARD THE REMAINING PILLS
CONTINUE TAKING THEM UNTIL THERE ARE NO PILLS LEFT
Answer:PROPERLY DISCARD THE REMAINING PILLS
Explanation: IT COULD BE EXPIRE AND YOU NEED THEM ANY MORE DISPOSE THEM!!!!!!!!
Answer:
properly to discard the remaining pills
Explanation:
From Earth to space, what is the correct order of the main layers in the atmosphere?
Answer:
troposphere, the stratosphere, the mesosphere and the thermosphere
Explanation:
The atmosphere of the earth is composed of layers based on the temperature. There are four layers in the atmosphere. They are ordered as troposphere, stratosphere, mesosphere and the thermosphere.
What are layers of atmosphere?The atmosphere of the earth is layered and each layer of the atmosphere has its own characteristics. The weather processes occur in the lower layers of the atmosphere. The four important layers are troposphere, stratosphere, mesosphere and the thermosphere.
The lowest layer of the atmosphere where we live is called the troposphere. It is this layer which contains weather, clouds, rain and snow. The layer above troposphere is called the stratosphere. It is in this part where ozone is found.
The mesosphere is found above stratosphere. Here the temperature is found to be less and reaches a minimum of about -90°C. The thermosphere lies above the mesopause where the temperature will be very high.
Thus the correct order is troposphere, stratosphere, mesosphere and the thermosphere.
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How can liquid reach higher temperatures in a pressure cooker than in an unsealed pot?
Answer:
Simple, the heat of it causes the atoms to move more quickly, which produces and uses energy.
Explanation:
Answer:
By heating in a closed system.
Liquids can reach higher temperatures in a pressure cooker than in an unsealed pot by the application of heat to the pressure cooker.
A pressure cooker is usually tightly closed with no surrounding air interference which helps to maintain the temperature and increase in the elastic collision of particles. The increase in particle collision helps the liquid in the pot to attain a higher temperature.
However, heating in an unsealed pot makes the interference of surrounding air with it very possible which will definitely slow down the particle collisions and reduce the temperature and pressure due to the both of them being directly proportional to each other.
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What is an alternative fuel?
O A. One that is available as a backup
B. One that uses nonrenewable resources
C. One that has not been developed yet
D. One that is not a fossil fuel
SUB
What is kinetic energy (KE)
A. energy an object has because of its position
B. energy an object has because of its height
C. energy an object has because of its direction
D. energy an object has because it is moving
Answer:
The answer is D, I hope this helps
Answer:
It would be D.energy an object has because it is moving-hope this helps
What is the molar mass of magnesium (Mg)? A 12.00 g/mol B 22.99 g/mol C 24.31 g/mol D 26.98 g/mol
Answer:
C 24.31g/mol
Explanation:
if you look at the periodic table, than when you look at the element magnesium (Mg) it is 24.305 in atomic mass which rounds up to 24.31
Sodium metal reacts with water to produce sodium hydroxide and
hydrogen gas. Determine the amount of hydrogen gas produced if 25.6
grams of sodium reacts with excess water.
Answer:
1.11g of H2.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
2Na + 2H2O —> 2NaOH + H2
Next, we shall determine the mass of Na that reacted and the mass of H2 produced from the balanced equation. This is illustrated below:
Molar mass of Na = 23g/mol
Mass of Na from the balanced equation = 2 x 23 = 46g
Molar Mass of H2 = 2x1 = 2g/mol
Mass of H2 from the balanced equation = 1 x 2 = 2g
From the balanced equation above, 46g of Na reacted to produce 2g of H2.
Finally, we shall determine the mass of H2 produced by the reaction of 25.6g of Na. This is illustrated below:
From the balanced equation above, 46g of Na reacted to produce 2g of H2.
Therefore, 25.6g of Na will react to produce = (25.6 x 2)/46 = 1.11g of H2.
Therefore, 1.11g of H2 is produced from the reaction.
Answer:
[tex]n_{H_2}=0.557molH_2\\\\m_{H_2}=1.11gH_2[/tex]
Explanation:
Hello,
In this case, such chemical reaction is represented by:
[tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex]
Thus, for 25.6 grams of sodium, whose molar mass is 23 g/mol, reacting in excess water, the amount of hydrogen gas, whose molar mass is 2 g/mol, that is obtained is computed by using the 2:1 molar ratio between sodium and hydrogen:
[tex]m_{H_2}=25.6gNa*\frac{1molNa}{23gNa} *\frac{1molH_2}{2molNa} *\frac{2gH_2}{1molH_2} \\\\m_{H_2}=1.11gH_2[/tex]
Or in moles:
[tex]n_{H_2}=25.6gNa*\frac{1molNa}{23gNa} *\frac{1molH_2}{2molNa} \\\\n_{H_2}=0.557molH_2[/tex]
Regards.
the strong nuclear force is always smaller then the electrostatic force true or false
Answer: I think that the answer was False.
Answer: false
Explanation:
Gravitational, electrostatic, strong nuclear, and weak nuclear
Please help me I have to turn it in today
explain also
Answer:
cylinder A has a higher density then cylinder B or more accurately the liquid in cylinder A is denser then the liquid in the second tube.
Explanation:
"Denser" simply means more matter is contained in the same space for example say you fill a tank with helium and another tank with water. Although they are the same size one will weigh much more because their is more particles or "stuff" inside the same area this can be because of a few things one it can be because the atoms or elements that compose the substance are heavier containing more electrons and protons in their orbit. or the molecular structure is more compact like a chicken wire fence has more wire in it then a barbed wire wire fence covering the same area because of the grid of wire in the middle.
Answer:
A is denser.
Explanation:
A radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Which is symbol of this radionuclide?
Superscript 32 subscript 17 upper P
Superscript 17 subscript 15 upper P.
Superscript 30 subscript 15 upper P.
Superscript 32 subscript 15 upper P.
Answer:
D. superscript 32 subscript 15 upper P
Explanation:
took the test
An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Superscript 32 subscripts 15 upper P is a symbol of this radionuclide. Therefore, option D is correct.
What is a radionuclide?A radionuclide is a type of nuclide that is unstable and undergoes radioactive decay. This means that the nucleus of the radionuclide is not stable and will spontaneously emit energy in the form of particles or electromagnetic radiation to become more stable.
The symbol of an element is determined by the number of protons in the nucleus, which is also known as the atomic number. In this case, the radionuclide has 15 protons, so it is an atom of phosphorus, which has an atomic number of 15.
The total number of nucleons in the nucleus (protons + neutrons) is 15 + 17 = 32. Therefore, the correct symbol for this radionuclide is Superscript 32 subscript 15 upper P, which represents an isotope of phosphorus with a mass number of 32.
Thus, option D is correct.
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How many grams of
CO2 will be produced
by burning 6 grams of carbon?
Please I really need your help
Answer:
Explanation:
22g of CO2
What is the role of a scientist
Answer:
This is what they usually do.
Explanation:
Scientists are often people who want to see change occur. ... Today, the role of a scientist is the same. We have the obligation to explore and discover. Scientists use their resources to bring about change, whether it is change in medicine, improvements in the environment, or creating more efficient fuels
Scientist Responsibilities. The role of a scientist is integral and vital for the better functioning of society. Scientists are responsible for conducting detailed research on various subjects. They are liable for influencing modern society with their new developments and innovations, bringing about a great change in the quality of life.
how many moles in 2.5 liters of methane gas
Answer:
0.155836449023405
Explanation:
The molecular formula for Methane is CH4.
The SI base unit for amount of substance is the mole.
1 grams Methane is equal to 0.062334579609362 mole.
Answer:
Explanation:
After calculating the answer will be 0.112 mol CH4
Which function do pygmy rabbits serve in a desert?
OA) eat sagebrush
B) make their own food
C) perform photosynthesis
D) convert light energy to chemical energy
Answer:
A
Explanation:
A: Eat sagebrush
A rabbit is an animal. It cannot make it's own food. It is a heterotroph, and it needs to feed on other organisms to survive. A pygmy rabbit would eat sagebrush, therefore this is the correct answer.
B: Make their own food
Rabbits and animals can't make their own food, they have to eat other things to survive. Therefore, this answer is incorrect.
C: Perform photosynthesis
Rabbits and animals can't perform photosynthesis, only plants, algae, and certain bacteria can. This answer is also wrong.
D: Convert light energy to chemical energy
In the process of photosynthesis, light energy from the sun is turned into chemical energy. Animals like rabbits can't perform photosynthesis, so this choice is also incorrect.
The best choice is A: eat sagebrush.
Ty thinks it's strange that a person with an Asian-sounding name speaks Spanish as her primary language. Ty's thoughts are an example of
A.interpersonal racism
B.racial stereotyping
C. racial inequality
D. institutional racism
Answer:
A. Interpersonal racism
Explanation:
Its not stereotypical to think that an Asian cant speak Spanish. The fact that he thought, Asian-sounding name, is stereotypical on its own, but taking in this entire situation, this is not racial stereotyping. It's also not racial inequality, since Ty isn't saying that Asians are asian people are lesser than another group. Institutional racism occurs when schools, governments, etc etc that seem race neutral are actually disadvantage racially marginalized groups and privilege whites.
Answer:
B.) Racial stereotyping
Explanation: