Answer:
One mole of carbon would look like 25/12.01
Explanation:
Firstly, you will divide 25 by 12.01 and get 2.081598
We know 1 mole equals the gram per atomic mass, so one mole of carbon is 12.01 grams. In conclusion, it would look like 25/12.01.
There are 0.568 moles of carbon are in 25 grams of carbon.
What are moles?The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
The moles can be calculated by dividing the mass of the substance to its molar mass.
The molar mass is 44 g/mol
The mass is 25 gram
[tex]Moles = \dfrac{25}{44} = 0.568[/tex]
Thus, there are 0.568 moles of carbon are in 25 grams of carbon.
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: Tell me about the best science experience you've ever had in your entire life in any science class
Answer:
Well, considering it's asking about a personal experience you should answer it but ill answer using one of mine.
Explanation:
TW: I AM TALKING ABOUT HUMAN ORGANS AND SEX
During my 7th-grade science class, we were talking/learning about male and female reproductive systems. One day going into class my teacher was standing over a big black bag and something was in it. Everyone was confused but we all sat down, my teacher explained that she has canceled our test. Everyone was happy including me, but she explained that if everyone could say what everything was called and where it was located we would get an A. At that moment she pulled the Black trash bag away and what was under the bag was 2 reproductive organs a Male and a Female one. Most of the girls started gagging and hid under the table (scared it was going to chase them or something) all the guys seemed so amazed. Anyways the weirdest part was when we were touching and saying what is what and what each thing does (with gloves on) one of the dudes thought it would be an amazing idea if he took the penis and put it inside of the uterus. (representing sex) Everyone was disgusted but my teacher said that in most situations that would be disrespectful but in this case she allowed it, and for the rest of the lesson she talked about how the baby forms and why we should have sex until we are 18.
That is my weird/ best science experience ive ever had.
1. Is the charge of nucleus positive, negative
or neutral?
What about the charge of an atom?
Answer:
nucleus contains protons and atom is neutral
Explanation:
as atom contains equal amount of protons and electrons
What information does an energy diagram give?
A. It shows the transfer of potential energy to kinetic energy.
B. It shows how concentrations of reactants affect the energy.
C. It shows the rate of the reaction as a function of time.
D. It shows the energy requirements needed in order for a reaction to
occur.
The information from diagram shows the energy requirements needed in order for a reaction to
occur.
What is Collision theory?The collision theory states that each and every chemical reaction can occur between particles when the molecules collide each other.
The collision between particles is necessary but it is not sufficient for a reaction to take place. The collisions must be effective.
It is necessary to know the exact nature of an effective collision since this indicates whether particles react with each other and form new products.
According to collision theory, the reaction occur when molecules collide and molecules have sufficient activation energy to cross energy barrier.
Greater the energy, greater will be number of collision. Lesser energy, lesser will be number of collision.
Thus, the given energy diagram shows about the energy required for a reaction to take place.
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Answer: D) it shows the energy requirements needed in order for a reaction to occur.
What is the Empirical Formula when the Molecular Formula is Sb17Br21
Difference Between Empirical and Molecular Formulas. The key difference between empirical and molecular formulas is that an empirical formula only gives the simplest ratio of atoms whereas a molecular formula gives the exact number of each atom in a molecule. In chemistry, we often use symbols to identify elements and molecules.
Hope I helped :)
Combustion of Propane Gas
C2H2 +02 →CO, +H₂O
Determine the coefficient of propane (C3H8) of the above reaction *
Answer:
15
I may be wrong worked it out in my head
hellpp
Directions: Write True if the statement is correct, and false if it is incorrect.
1. The molecular formula can be calculated from the empirical formula if the molar
2. The molar mass represents the total mass, or 100 % of the compound.
mass is unknown.
3. Molecular formula gives the relative number of atoms of each element in the compound. 4. We can obtain the molecular formula from the empirical formula if we know the
molecular weight of the compound.
5. If a compound's chemical formula cannot be reduced any more, then the empirical formula is the same as
the molecular formula.
Answer:
Explanation:I think that there should be no explaing and straight to the showing.
This is my question.............
Answer:
-3.15 °Celsius I think.
Answer:
-3 C
Explanation:
what happens when carbon dioxide is passed through water?
Answer:
it results in the formation of a salt called calcium carbonate and the solution becomes or appears to be milk-like. It is because calcium carbonate is insoluble in water.
What is electro-magnetic radiation?
It is a kind of radiation including visible light ,radio waves, gamma rays, and x-rays in witch electric and magnetic fields vary simultaneously. Hope that helps :)
How do different factors affect solubility? Check all of the boxes that apply.
Increasing temperature decreases the solubility of gases.
Stirring increases the solubility of solids.
Increasing pressure increases the solubility of liquids
Decreasing temperature decreases the solubility of solids.
Increasing pressure increases the solubility of gases.
Decreasing the amount of solvent decreases the solubility of solids, liquids, and gases
Answer:
Dear, your answer is
solubility is affected by current concentration, mechanical disturbance, temperature and pressure. So the answers are:
- Increasing temperature decreases the solubility of gases.
- Stirring increases the solubility of solids.
- Increasing pressure increases the solubility of gases.
- Decreasing the amount of solvent decreases the solubility of solids, liquids, and gases.
Answer:
A,D,E
Explanation:
edge 2020
Which affects would many orgasms likely experience of global warming occurs
Answer:
(A) Climate Change (B) Climate Change and Plant Communities (C) Effect on Sea Levels (D) Reduction of Biodiversity (E) Effect on Agriculture (F) Effect on Arctic Ecosystems (G) Overall Effect.
Explanation:The increase in temperature will be greatest at high latitudes and over large continents. Climatic changes as a result of global warming will naturally affect the biotic communities on this earth. Rising temperatures will cause glaciers to melt and the polar ice caps to shrink. As mentioned above increased temperatures, inundation of some coastal biological communities and changes in the pattern of distribution of many species over a long period of time are likely to cause reduction in biodiversity in aquatic and terrestrial ecosystems. The global climate change may have important effects on agriculture. Global climate change will have profound effects on arctic ecosystems. The overall effect of global warming on world climate has many dimensions, some of which are discussed above. The natural greenhouse maintains the earth’s temperatures within the limits for physiological functions. But studies suggest that even a moderate increase in the average global temperature could result in significant changes in biotic communities including reduction in biodiversity both in terrestrial and aquatic ecosystems.
On a distance-time graph, a horizontal line indicates that the speed is
A. Increasing
B. Decreasing
C. Slow
D. Zero
Answer:
C
Explanation:
25 POINTS PLS ANSWER
Through which gas in the table do sound waves travel the fastest?
A. Ammonia Speed of sound 415
B. Air(dry) Speed of sound 346
C. Methane Speed of sound 450
D. Nitrous oxide speed of sound 263
Answer:
The answer would be methane if the problem is asking for the fastest
Explanation:
I hope this helps answer your question
:D
Answer: Methane
Explanation:
Took the quiz and got it right
How could human activities affect natural resources like air, trees, and soil?
Answer: think of the Greenhouse effect, carbon gasses in the air cause a warmer environment because there's no way for the gasses to escape Earth's atmosphere, therefore leading to polluted air, and a dirty ecosystem in our wildlife
In what state of matter is the substance in at 200 C and 30 atm
1.The splitting of a heavy, unstable nucleus into two lighter nuclei is called _____.
a. Fission
b. Fusion
c. Radioactive Decay
d. Isotopes
Answer:
A) Fission
Explanation:
Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.
Which of the following BEST supports the Big bang theory of the origin of the universe?
Answer: first one
Explanation:
What do lysosomes and Golgi bodies have in common
Answer:
they're examples of cell organelles
Explanation:
because it is ♥╣[-_-]╠♥
define and explain sublimation and name the substance that sublime directly on heating
Answer:
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... So, all solids that possess an appreciable vapour pressure at a certain temperature usually can sublime in air (e.g. water ice just below 0 °C).
I hope it's helpful!
The mass spectra of alcohols often fail to exhibit detectable M peaks but instead show relatively large ________ peaks.
Answer: M-18
Explanation:
The mass spectra of alcohols often fail to exhibit detectable M peaks but instead show relatively large __M-18___ peaks.
Mass spectroscopy is used to determine the molecular mass and molecular formula of a sample.
When the mass spectra of alcohols do not show detectable M peaks, they show relatively large M-18 peaks.
Some light energy can be seen and some cannot be seen with the unaided eye.
There is one type of light energy that is virtually everywhere in most American cities, but it is invisibl
wavelength so long that it can pass right through buildings, and even through human beings, withou
is used to transmit information long distances, since very little interferes with it, and it can be easily
Humans have used this type of light energy for many years to transmit and receive many different ty
technology to use it is so widespread that it is in almost every modern car, truck, and home.
What type of light energy is this?
A.
radio
Св.
ultraviolet
C
gamma
D. X-ray
Given 25.43 g of O2 gas, how many liters of gas will you have at STP?
Answer value
Given :
Mass of O₂, m = 25.43 g.
To Find :
How many liters of gas will you have at STP.
Solution :
Molecular mass of O₂, M.M = 2 × 16 gram/mole
M.M = 32 gram/mole
Number of moles is given by :
n = m/M.M
n = 25.43/32 mole
n = 0.79 mole
Hence, this is the required solution.
If 2.5 moles of sulfur dioxide are created, how many moles of oxygen are necessary?
S someone help please!!!!
Answer:
4) south 5) true Explanation:
10. A tracer is a radioactive element whose pathway through which a chemical reaction can be followed. Tracers are commonly used in the medical field and in the study of plants and animals. Radioactive Iodine-131(I131) can be used to study the function of the _____ gland assisting in detecting disease.
a. Adrenal
b. Salivary
c. Pituitary
d. Thyroid
Calculate mass of hydrogen chloride produced from 11.3g H and 11.3g Cl.
H2 + Cl2 -> 2HCl
Answer:
22.6According to the law of conservation of mass, the total mass of reactants should be equal to the total mass of products. Here, total mass of reactants= 11.3+11.3=22.6
•
• • Mass of Hcl produced=22.6 g
PLEASE QUICK!! if you know the answers
Answer:
7. 4 neutrons.
8. 7 amu.
9. Proton.
10. Electron.
11. Neutron.
12. Protons and neutrons.
Explanation:
Hello!
In this case, given the atomic structure of the considered element, we can answer the questions as shown below:
7. Since the neutrons are placed into the element's nucleus, and they are neutrally charged, we see there are 4 neutrons:
8. Since the atomic mass of an element is computing by adding the number of protons and electrons, as this atom has three protons and four neutrons, its atomic mass is 7 amu.
9. Proton.
10. Electron.
11. Neutron.
12. Considering the given picture and the widespread atomic theories, we realize that inside the nucleus of an atom there are protons and neutrons.
Best regards!
Name of SiO3? Please hurry lol
How are light-years used to measure distances and sizes in the universe?
O
A They provide information about time as well as distance and size.
B. They provide more accuracy than using other units of distance and size.
O
C. They provide smaller numbers to work with when measuring distances and sizes in the universe
D. They provide easy conversion into scientific notation, unlike other units of distance and size.
Answer:
.
Explanation:
A light-year is how astronomers measure distance in space. It's defined by how far a beam of light travels in one year – a distance of six trillion miles. Think of it as the bigger, badder cousin of the inch, the mile, the kilometer, and the furlong.
Carbon-14 is used in radiocarbon dating.
The half-life of carbon-14 is 5.73E3 years. If a sample of carbon-14 has an activity of 0.350 Ci, what is the difference in activities between this sample and the same sample after 1.719E4 years?
Answer:
0.30625 Ci
Explanation:
From the question given above, the following data were obtained:
Half-life (t½) = 5.73E3 years
Original activity (Nₒ) = 0.350 Ci
Time (t) = 1.719E4 years
Difference in activities =?
Next, we shall determine number of half-lives that has elapse. This can be obtained as follow:
Half-life (t½) = 5.73E3 years = 5.73×10³ years
Time (t) = 1.719E4 years = 1.719×10⁴ years
Number of half-lives (n) =?
n = t / t(½)
n = 1.719×10⁴ / 5.73×10³
n = 3
Thus, 3 half-lives has elapsed.
Next, we shall determine the activity after 1.719E4 years. This can be obtained as follow:
Original activity (Nₒ) = 0.350 Ci
Number of half-lives (n) = 3
Activity remaining (N) =?
N = 1/2ⁿ × Nₒ
N = 1/2³ × 0.350
N = 1/8 × 0.350
N = 0.125 × 0.350
N = 0.04375 Ci
Finally, we shall determine the difference in activities. This can be obtained as follow:
Original activity (Nₒ) = 0.350 Ci
Activity remaining (N) = 0.04375 Ci
Difference in activities =?
Difference in activities = Nₒ – N
Difference in activities = 0.350 – 0.04375
Difference in activities = 0.30625 Ci.