Explanation:
Start with a balanced equation.
2H2 + O2 → 2H2O
Assuming that H2 is in excess, multiply the given moles H2O by the mole ratio between O2 and H2O in the balanced equation so that moles H2O cancel.
5 mol H2O × (1 mol O2/2 mol H2O) = 2.5 mol O2
Answer: 2.5 mol O2 are needed to make 5 mol H2O, assuming H2 is in excess.
Alesha, Kayden,Leo and Caroline are lab partners. They completed the lab in which they put a small marshmallow in a closed, see-through container. They then pushed a plunger down to decrease the volume of the container. They observed the marshmallow looking squished and crumpled. For their lab write up, they must identify the relationship between volume, temperature and pressure of a gas to explain what they saw during this experiment. Determine which student is correct from the statements below.
A.
Alesha says the lab showed that when volume is decreased, pressure is increased. The increase in the pressure in the container is what made the marshmallow look squished and crumpled.
B.
Caroline says the lab showed that when volume is increased, pressure is increased. The increase in the pressure in the container is what made the marshmallow look squished and crumpled.
C.
Kayden says lab showed that when volume is decreased, temperature is increased. The increase in the temperature in the container is what made the marshmallow look squished and crumpled.
D.
Leo says the lab showed they increased the temperature of the container by breathing on it and decreased the volume by pushing down the plunger. Both of increasing the temperature and decreasing the volume caused the pressure to decrease and make the marshmallow look squished and crumpled.
3. How does genetic variation allow humans to survive long-term? Which
type of reproduction is responsible for genetic variation?
Answer:
more genetic variation within a population usually enables more phenotypic variation.
Explanation:
Because natural selection acts directly only on phenotypes, Some new alleles increase an organism's ability to survive and reproduce, which then ensures the survival of the allele in the population.
Genetic variation lets the organisms survive long term as it increases the phenotypic and the genotypic variation. Genetic variation is due to the type of reproduction that involves two parents.
What is genetic variation?Genetic variation is the modification of the original genome of the organism by genetic recombination and mutation that can be beneficial in the survival and the natural selection process.
Reproduction involving two parents of the same species allow genetic variation as the process of independent assortment and crossing over of the chromosomes inherited from both creates species with different traits and genotype.
Therefore, the reproduction involving two parents results in genetic variation.
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Is temperature and pressure directly proportional or inversely proportional?
A. Inversely proportional
B. Directly proportional
What is the molarity of a solution made by diluting 0.025L of 6.0 M HCl until
the final volume of the solution is 1.75 L?
Answer:
Explanation:
Use the dilution equation: M1V1 = M2V2
M1 = 6.0 M
V1 = 0.025 L
M2 = ?
V2 = 1.75 L
(6.0 M)(0.025 L) = M2(1.75 L)
Solve for M2 --> M2 = 0.086 M HCl
Protons are in the nucleus of the atom and have a positive charge.
True or False?
Which type of cell would you expect to contain large amounts of mitochondria?
fat cells
muscle cells
liver cells
skin cells
muscle cells hope it helps
TICLA ruuis SLCLLICU 10115CI.
Question 3 (1 point)
Which option correctly ranks the states of matter from slowest to fastest particle
speed.
gas, liquid, solid
solid, liquid, gas
solid, gas, liquid
gas, solid, liquid
A gas has a volume of 240.0mL at 25.0 oC and 0.79 atm. Calculate its volume at STP (1 atm and 0 oC).
Answer:
189.6 mL
Explanation:
As per Boyles law when a gas is kept at a constant temperature and mass in a closed container, the volume and pressure vary inversely.
P1V1= P2V2
Here, P1 = 0.79 atm, V1 = 240 ml, P2= 1 atm
therefore, substituting values in above equation we get
0.79×240 = 1×V2
⇒V2 = 189.6 ml
therefore, its volume at STP (1 atm and 0 oC) = 189.6 ml
What happened during the fusion reaction shown?
Answer:
the answer to this question B. Two H nuclei that fused into one He necleus
Explanation:
Two hydrogen atoms fused to one helium molecule, hence option B is correct.
What is fusion?Fusion is defined as a process in which two or more atomic nuclei unite to create new atomic and subatomic particles. Heat, which is produced when two atoms fuse, is the key to generating energy. Similar to how nuclear fission produces energy, this heat can be utilized to warm water, produce steam, and turn turbines to produce electricity.
In the core of the Sun, hydrogen is being converted to helium. This phenomenon is known as nuclear fusion. Fusion is what powers both the sun and the stars. One example of this kind of reaction is when two hydrogen atoms combine to form a helium atom. During the process, a portion of the hydrogen's mass is converted into energy.
Thus, two hydrogen atoms fused to one helium molecule, hence option B is correct.
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The unit of measure for potential and kinetic energy is the
Answer:
kilograms x meters2/seconds2
Explanation:
Answer:
kilograms x meters2/seconds2
Explanation:
Why does a DNA fingerprint require millions of copies of each DNA fragment
Answer:
Because it can identify a person.
A DNA fingerprint is a piece of DNA so distinct that it can prove a person's identity. These distinct areas can take on many different forms, but each form is unique to any one individual.
PCR allows the amplification of a single copy of DNA into millions of copies. However this technique requires that the DNA of interest already be of a known sequence in order to design primers that will specifically hybridize to the target DNA.
It is important as:
It's used as evidence in courts, to identify bodies, track down blood relatives, and to look for cures for disease.
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What happens when a chemical reaction reaches equilibrium
1
What is the mass of 0.328 mol of CO2?
Answer:
use this conversation units to help you hope it helpsAnalyzing models compare an atom’s structure to a ladder. Identify one way in which ladder is not a good model from the atom.
Answer:
Climbing a ladder assumes that you would touch/use each step only once. Electrons will take one layer that is empty first, and previous layers or "steps" will continue being filled with additional electrons only when every other layer is occupied by, at least, one electron.
Explanation:
A good analogy is what passengers in a bus do. Everyone tries to sit alone first and only when every pair of seats has a person already seated, people will use them as well, sitting next to each other.
What is the rate of effusion of Xenon (Xe) gas if the rate of Chlorine (Cl) gas escaping
through a fluorescent light fixture is 2.5 L/min?
Helpppppppppppppppppppppppp
Answer:
C
Explanation:
all of the fish, bacteria, and mammals that live in a lake
hope this helps!
What is the formula for Iron(IV) phosphite
Answer:
The answer is Iron phosphide (Fe2P)
Which of the following is a unit of volume?
A.
milliliter
B.
pound
C.
gram
D.
centimeter
Answer:
a. milliliter.
Explanation:
I hope this helps
Answer:
milliliter
Explanation:
think liter
After years of hard work you finally come up with a new chemical substance that
will revolutionize the world. What are it's properties? What do you call it? *
Zit be gone. a chemical that contains many natural healing plants that very quickly gets rid of zits. :) -weak answer but it's an answer I guess
Use the drop down menus to answer the questions. In what type of plate boundary did subduction occur? In what type of plate boundary did new crust form? In what type of plate boundary did mountains form? In what type of plate boundary did volcanoes form? In what type of plate boundary did a river change its path? Use the drop down menus to answer the questions. In what type of plate boundary did subduction occur? In what type of plate boundary did new crust form? In what type of plate boundary did mountains form? In what type of plate boundary did volcanoes form? In what type of plate boundary did a river change its path? Use the drop down menus to answer the questions. In what type of plate boundary did subduction occur? In what type of plate boundary did new crust form? In what type of plate boundary did mountains form? In what type of plate boundary did volcanoes form? In what type of plate boundary did a river change its path?
Answer:
the answers to this is Convergent, Divergent, Convergent, Convergent, and Transform
Explanation:
i just answered it :))
In different types of plate boundaries, various geological features occur such as volcano and mountain formation.
What are plate boundaries?Plate boundaries are the areas where the edges of two tectonic plates meet.
Plate boundaries can either be divergent, convergent, or transform.
At different plate boundaries, different geological activities occur.
At convergent plate boundaries, subduction occurs.At divergent plate boundaroes, new crust forms.At convergent plate boundaries, mountains form.At convergent plate boundaries, volcanoes form. At transform plate boundaries, a river change its path.Therefore, at different types of plate boundaries, various geological features occur.
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How is my drawing. Rate it on a scale of 1-10
Answer:
I rate it 10/10
Explanation:
I like it. :)
Answer:
I think 8.5 it looks cool
The distance between the Grand Canyon and Mt. Rushmore is approximately 1.147 km. What is this in meters?
Answer:
1147
Explanation:
you multiply the length by 1000
Which of these choices is the best definition of absolute dating?
A. determining the age of a rock layer by studying the fossils present
B. finding the age of an object compared to other objects
C. measuring the age of an object in years using any method
D. determining the amount of a radioactive isotope in an object
Answer:
I think it's A because the sedimentary rock is also involved in finding the fossils to determine their phenotype and their roots.
why are metals poor choices for coffee mugs?
Answer:
They will stay too hot.
Explanation:
You would burn yourself on the mug and your drink would be too hot to drink.
Please help ASAP!! I’m stuck!!
Which statement is true based on the formula?
6CO2 + 6H2O —> C6H12O6
+ 6O2
1. The mass of carbon dioxide plus water is equal to the mass of sugar plus oxygen
2. The mass of carbon dioxide plus water is less than the mass of sugar plus oxygen
3. The mass of carbon dioxide plus water is greater than the mass of sugar plus oxygen
Answer:
The answer of this question is 3
i need help!! i need to make it like 3:2
Answer:
use visual studio code and put in this print{3:2}-1
Explanation:
How many grams of MgBr2 are needed to create 3.0L of a 4.5M aqueous solution of magnesium bromide?
Answer:
2486 g
Explanation:
First we calculate how many moles of MgBr₂ are required to create such a solution, using the definition of molarity and the given volume and concentration:
Molarity = moles / liters4.5 M = moles / 3.0 Lmoles = 4.5 M * 3.0 L = 13.5 molNow we convert 13.5 moles of MgBr₂ into grams, using its molar mass:
13.5 mol * 184.113 g/mol = 2486 gHow is stoichiometry used to calculate the amount of product produced?
A. Stoichiometry measures the amount of product obtained.
B. Stoichiometry determines the molar mass of the product.
C. Stoichiometry calculates the grams of the limiting reagent.
D. Stoichiometry relates moles of product.
Answer:
Stoichiometry relates moles of reactant to moles of product
Explanation:
Just took the quiz :)
Answer:
Stoichiometry relates moles of reactant to moles of product.
Explanation: :)
Solar energy converts ___ into either ___ energy or electrical energy.
electromagnetic, thermal
electromagnetic, potential
thermal, nuclear
chemical, thermal
Answer:
Hey mate....
Explanation:
This is ur answer.....
Solar radiation can be converted either into thermal energy (heat) or into electrical energy.Hope it helps!
mark me brainliest plz......
Follow me! :)
2. Mitosis is great for repair and damage. TRUE OR FALSE
Answer:
TRUE
HOPE THIS HELPS!
Explanation:
Answer:
True
Explanation: