Answer: 5.3 moles
Explanation:
Hi, to answer this question we have to apply the next formula:
n = PV/RT
Where:
n = number of moles
P= Pressure = 2.15 atm
V= volume = 60.5 L
R = 0.0821 atm(L)/mol(K)
T = temperature = 25 °+ 273.15 = 298.15 Kelvin
Replacing with the values given:
n = 2.15 (60.5) / 0.0821 (298.15) = 5.3 moles.
Feel free to ask for more if needed or if you did not understand something.
Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen,
and nitrogen. Which term most likely describes what she is measuring?
final pressure
atmospheric pressure
combined pressure
partial pressure
Answer:
Partial pressure
Explanation:
the scientists is measuring different pressure, so it would be partial pressure. Hope that this helps you and have a great day :)
What is the frequency of an electromagnetic wave that has a wavelength of
7.6 x 10^-6 m in a vacuum? (The speed of light in a vacuum is 3.00 x 10^8
m/s.)
A. 2.3 x 10^3 Hz
B. 1.3 x 10^5 Hz
C. 4.0 x 10^13 Hz
D. 2.5 x 10^-14 Hz
Answer:
D. 2.5 x 10 ^-14 Hz
Explanation:
Use wavelength formula: v = f x wavelength
Rearrange formula for frequency.
f = wavelength / v
f = 7.6 x 10 ^-6 / 3.00 x 10 ^8
f = 2.5 x 10^-14 Hz
PLEASE I NEED HELP WITH THIS LAST PROJECT!!!!!!
1. How do the physical properties of the slime differ from the physical properties of the glue and borax alone?
2. Stretch the slime slowly. Can you make a sheet thin enough to see through?
3. Form the slime into a roll. What happens if you pull the ends of the roll quickly? What happens if you pull it slowly?
4. Put a clean beaker on a table upside down. Roll the slime into a ball and place it on top of the beaker. Describe what
has happened after 30 minutes.
5. Roll the slime into a ball. Does it bounce?
6. Do some research on polymers. Make a list of 20 items around the house that are composed of polymers. (Hint:
Read labels!)
Answer:
1.Borate ions, provided by the borax (hydrous sodium borate), cause the vinyl molecules in the glue to form cross-linked bonds. The process of cross-linking continues to alter the physical properties of the polymer. As more and more bonds are formed, the characteristics of the polymer change.
2.
If we pull the ends of the roll quickly, it will break.
If we roll the slime into a ball and place it on top of the beaker it slowly flow down.
3.When you pull slowly, your slime will stretch. However if you pull quickly it will break. Slime will slowly flow making it seem like a liquid, but it can also bounce which makes it seem a bit like a solid.
4.If we roll the slime into a ball and place it on top of the beaker it slowly flow down. After 30 minutes, slime will settle and behave as a solid, because water evaporates.
5.Yes, the slime ball will be able to bounce.
6.High Density Polyethylene, HDPE : bottle caps, folding tables and chairs, food storage containers, plastic bags, water pipes for domestic water supply. MDPE : shrink film, carrier bags, screws and enclosures. Linear LDPE : toys, lids, buckets, containers, bubble wrap.
Explanation:
CAPITAL LETTERS
in a genotype
mean...
Answer:
GENOTYPE IS THE COLLECTION OF GENES RESPONSIBLE FOR THE VARIOUS GENETIC TRAITS OF A GIVEN ORGANISM
Answer:
A capital letter represents the dominant form of a gene (allele),
and a lowercase letter represents the recessive form of the gene (allele).
Hope this helps..
Which of the following is equal to 0.500 mol?
A. 32.0 g O(2)
B. 103.6 g Pb
C. 36.0 g H(2)O
D. 14.0 g CO(2)
help please
Answer:
B
Explanation:
Think about the molar masses of each.
O2 -> 32 g
So 32 g = 1 mol.
Pb -> 207.2 g
So 103.6 g = .5 mol!
H2O -> 18 g
So 36 g = 2 mol.
CO2 -> 44 g
So 14 g = .3 mol
What is the relationship between all of these?
Answer:
3
Explanation:
1 3 3 3 is the order of the choose
Which one of the following word equations represents a neutralization reaction? A) salt + water → acid + base C) base + acid → salt + water B) base + salt → water + acid D) salt + acid → base + water
Part B is the correct answer.
When base and acid react, the result is salt and water.
Therefore....
Base+acid = salt+water
Take a look at this dandelion. The yellow flower on the right is _______ pollinated and the seeds on the left are transported by ___________. A) wind; water B) insect; wind C) insect; birds D) animals; water
Answer:
Insect and wind are the correct answer
Explanation:
Just took the test on USA Test Prep
What mass of potassium chlorate is needed to produce 8.50 mol of oxygen? 2KCIO3 →
2KCl +302
Answer:
694.2915 grams of potassium chlorate is needed to produce 8.50 mol of oxygen
Explanation:
It is possible to apply the following rule of three: if by stoichiometry 3 moles of O₂ are produced by 2 moles of KCIO₃, when reacting 8.5 moles of O₂, how many moles of KClO₃ are necessary?
[tex]moles of KClO_{3} =\frac{8.5moles of O_{2}*2moles of KClO_{3} }{3moles of O_{2}}[/tex]
moles of KClO₃= 5.67
To know the amount of mass present in 5.67 moles of the compound, it is necessary to know the molar mass, that is, the amount of mass that a substance contains in one mole. Being:
K: 39 g/moleCl: 35.45 g/moleO: 16 g/moleThe molar mass of the compound is:
KClO₃= 39 g/mole + 35.45 g/mole + 3* (16 g/mole)= 122.45 g/mole
Then you can apply the following rule of three: if in 1 mole of the compound there are 122.45 grams, in 5.67 moles how much mass is there?
[tex]mass=\frac{5.67 moles*122.45 grams}{1 mole}[/tex]
mass= 694.2915 grams
694.2915 grams of potassium chlorate is needed to produce 8.50 mol of oxygen
A pathogen enters an organism and infects it. Which statement best describes the general effect of the infection on the organism? *
A. The organism experiences a disruption in homeostasis.
B. The organism cannot obtain energy.
C. The organism cannot reproduce.
D. The organism experiences uncontrolled cell growth.
Answer:
Option A, The organism experiences a disruption in homeostasis.
Explanation:
When a pathogen enters the organism’s body, it disrupts its homeostasis. There are several receptors in the body that are responsible for maintaining the stability of the body through negative feedback loop.
A foreign element attaches to the surface of these receptors and hence disrupts their attachment with the probable substance necessary for the regulation of essential body function.
Thus, the temperature regulation get s impaired, hormonal imbalances occur, feeding system disturbs etc.
Hence, option A is correct
Which phrase is the best summery of the model shown?
If all people understood the common heritage that we have with the Earth and our environment - namely, that the very atoms that make up our bodies were formed in stars, just like the atoms in rocks, in the atmosphere and in every living thing - would people be more inclined to treat the environment with more care?
Answer:
No
Explanation:
It is one of those harsh realities that no matter how hard we try to connect people to their roots aka make them understand that everything is interconnected like the breathe you throw out is used by plants in photosynthesis, the O2 plants give is used by us. Living beings and Non-living beings are all connected and most humans know about this. But, when it comes time for earning the $$$, people's judgements are often clouded by their greed hence no matter how hard we try to make people understand we are all connected and that they should take care of the environment more, they will likely treat the environment as they always have been: to serve their financial and selfish needs.
TLDR: People are selfish hence probably will not treat environment with more care even if we educate them about our interconnectedness.
What is the answer to this question
Answer:
C
Explanation:
C is the correct answer to this question.
One parent is homozygous and has brown fur...
Hope this helps.
Which of the following are more reactive than iron?
Check all that apply.
A. Aluminum
B. Potassium
C. "Gold
D. Silver
Answer:
The answer is A and B.
Explanation:
Using Reactivity Series .
What would be challenging about life on Mars?
Answer: it would be too hot to live on and hard to get any oxygen from the ground because it doesn’t support life there.
Explanation:
science.
Answer:
On Mars, it is too cold to support life, the only existing water is at it's north and south pole in solid form (ice). It's atmosphere is about 100 times thinner than Earth's so it couldn't hold in any heat anyway.
How many ions does each of these symbols have, I need answer and my science teacher doesn’t tell us or explain it to us
Answer: about 14
Explanation:
A sample of 450.0 g of water is found to contain 180 mg Cd. What is this concentration in parts per million?
Answer:
The correct answer is 399.8 ppm
Explanation:
A concentration in parts per million (ppm) is equal to:
[tex]1 ppm = \frac{1 g solute}{10^{6}g solution}= \frac{1 mg solute}{1 kg solution}[/tex]
Solute: Cd; Mass = 180 mg x (1 g/1000 mg) = 0.18 g
Solvent: Water ; Mass= 450.0 g x (1 kg/1000 g) = 0.45 kg
We have the following total mass of solution:
Mass of solution = Mass of solute + Mass of solvent = 0.18 g + 450 g = 450.18 g = 0.45018 kg
Finally, we divide the mass of solute (in mg) into the mass of solution (in kg) to obtain the ppm (in mg/Kg):
ppm = 180 mg/0.45018 kg = 399.8 mg/Kg = 399.8 ppm
Which features may form as a result of erosion related to runoff? Select three options.
deltas
gullies
rills
stalactites
tributaries
Answer:
gullies
rills
tributaries
Are the correct answers!!
Explanation:
A gully is a landform created by running water, eroding sharply into soil, typically on a hillside.
A rill is a shallow channel cut into soil by the erosive action of flowing water.
A tributary is a stream or river that flows into and joins a main river.
Hope this Helps..Mark as Brainliest!!
What drives this process?
Answer:
D.
Explanation:
The sun makes the land warm, while the water stays colder. This make the warm air rise off the ground and causes the cool are to replace it (making it come from the ocean)
How do you draw acetone using a Bohr model?
Explanation:
this is the one i found.....
What are most conductors made of?
A: Wood
B: Paper
C: Plastic
D: Metal
Answer:
D: Metal
Explanation:
Most conductors are made from metal, for the alloys allow for a "freer" passage way for electrons to pass through.
~
Answer:
D. Metal
Explanation:
hopeee thisss helpss
To determine if something is a living organism,
you could check to see if it responds to its
environment.
TRUE
FALSE
Answer:
Yes, it's A) True
What is the definition of a Lewis base?
a substance that donates a proton
a substance that donates electrons to form a covalent bond
a substance that accepts electrons to form a covalent bond
a substance that when dissolved in water increases hydrogen ion concentration
Answer:
the definition is : a compound or ionic species which can donate an electron pair to an acceptor compound.
so as far as i know i know the answer is: a substance that accepts electrons to form a covalent bond.
please mark me brainliest may god bless you...
Explanation:
The definition of a Lewis base is: C. a substance that accepts electrons to form a covalent bond.
What is a Lewis base?
A Lewis base can be defined as a specie of an ionic or chemical compound that contains an empty orbital which allows it to donate an electron pair (two or more electrons) to form a covalent bond.
This ultimately implies that, a Lewis base is a chemical substance that accepts an electron pair (two or more electrons) to form a covalent bond.
Examples of a Lewis base.In Chemistry, some examples of a Lewis base include the following:
[tex]OH^-[/tex]CO[tex]H_2O[/tex]ROH[tex]NH_3[/tex]Read more on Lewis base here: https://brainly.com/question/3655338
A substance that can be broken down and recycled by bacteria and other decomposes is said to be__________
Answer:The substance is Biodegradable
Explanation:
When something is biodegradable it can be broken down by organical processes or decomposers.
2. Can oxidation occur without reduction? Explain.
Answer: Nope
Explanation:
Oxidation occurs because an agent that causes the oxidation---the oxidizing agent---must itself get reduced
Use the chemical equation below to answer the following two questions.
As(OH)3(aq) + H2SO4(aq) → As2(SO4)3(aq) + H2O(1)
3. When the above equation is balanced, what is the stoichiometric coefficient for As(OH)3?
(a) 1
(b) 2
(C) 3
(d) 4
(e) 5
4. When the above equation is balanced, what is the stoichiometric coefficient for H2O?
(a) 1
(b) 2
(C) 4
(d) 6
(e) 8
What happens first during cellular respiration?
A. The movement of small organic molecules into a mitochondrial
B. The breakdown of food molecules into smaller organic molecules
C. The formation of many molecules of ATP
D. The breakdown and small organic molecules into carbon dioxide
Answer:
b
Explanation:
ape ex
During cellular respiration, the first step is the breakdown of food molecules, such as glucose, into smaller organic molecules, specifically in a process called glycolysis. This process occurs in the cytoplasm of the cell and does not require oxygen. The breakdown of glucose results in the formation of two molecules of pyruvate.
After glycolysis, depending on the availability of oxygen, further steps of cellular respiration occur. If oxygen is available, the pyruvate molecules enter the mitochondria, where they undergo further breakdown through processes like the Krebs cycle and oxidative phosphorylation, resulting in the production of ATP (adenosine triphosphate), which is the primary energy currency of the cell.
Therefore, option B, the breakdown of food molecules into smaller organic molecules, is the first step in cellular respiration.
Learn more about glycolysis here:
https://brainly.com/question/26990754
#SPJ 2
During an experiment, Stephanie found 4.5 mg of iron in a 750 g water sample. How many parts per million of iron are in the water sample ?
Answer:
6ppm
Explanation
We'll begin by calculating the concentration of the solution in mg/g. This is illustrated below:
Mass of iron = 4.5mg
Mass of water = 750g
Concentration in mg/g = 4.5/750 = 6×10¯³mg/g.
Now, we can obtain the concentration in ppm as follow:
1mg/g = 1000ppm
Therefore, 6×10¯³mg/g = 6×10¯³ x 1000 = 6ppm.
It takes about __________________________ for Earth to rotate one time.
Answer:
24 hours
Explanation:
Therefore we have 24 hours in a day
Which represents the balanced equation for the beta minus emission of phosphorus-32? Superscript 32 subscript 15 upper P right arrow superscript 28 subscript 13 upper A l plus superscript 4 subscript 2 upper H e. Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 14 upper S i plus superscript 0 subscript negative 1 e. Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 16 upper S plus superscript 0 subscript negative 1 e. Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 14 upper S i plus superscript 0 subscript plus 1 e.
Answer: Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 16 upper S plus superscript 0 subscript negative 1 e.
Explanation:
Beta Decay : It is a type of decay process, in which a proton gets converted to neutron and an electron. This is also known as -decay. In this the mass number remains same but the atomic number is increased by 1.
The general representation of beta minus emission is :
[tex]_A^Z\textrm{X}\rightarrow _{A+1}^Z\textrm{Y}+_{-1}^0e[/tex]
The representation of beta decay of phosphorous- 32 :
[tex]_{15}^{32}\textrm{P}\rightarrow _{16}^{32}\textrm{S}+_{-1}^0e[/tex]
Superscript 32 subscript 15 upper P right arrow superscript 32 subscript 16 upper S plus superscript 0 subscript negative 1 e.
Answer:
C
Explanation: