Answer: A. 20.0L
Explanation:
According to avogadro's law, equal moles of all gases occupy equal volumes at STP.
The given balanced equation is:
[tex]2C_2H_2(g)+5O_2(g)\rightarrow 2H_2O(g)+4CO_2(g)[/tex]
According to stoichiometry :
4 L of [tex]CO_2[/tex] is formed by = 2 L of [tex]C_2H_2[/tex]
Thus 40.0 L of [tex]CO_2[/tex] is formed by = [tex]\frac{2 L}{4L}\times 40.0L=20.0L[/tex] of [tex]C_2H_2[/tex]
Thus 20.0 L of [tex]C_2H_2[/tex] is required to form 40.0L of [tex]CO_2[/tex]
Answer:
Explanation:
can someone help me out here i can’t see the answer
What was Bohr's model of the atom?
Answer:
In atomic physics, the Bohr model or Rutherford–Bohr model, presented by Niels Bohr and Ernest Rutherford in 1913, is a system consisting of a small, dense nucleus surrounded by orbiting electrons—similar to the structure of the Solar System, but with attraction provided by electrostatic forces in place of gravity.
Explanation:
Answer:
In atomic physics, the Bohr model or Rutherford–Bohr model, presented by Niels Bohr and Ernest Rutherford in 1913, is a system consisting of a small, dense nucleus surrounded by orbiting electrons—similar to the structure of the Solar System, but with attraction provided by electrostatic forces in place of gravity
Cells get chemical energy from food through a series of chemical reactions called _______________
Answer: oxidation reactions
Explanation:
What is the best way to measure the age of the Earth and why? Explain how scientists do this.
Explanation:
the best way to understand the age of the earth is to estimate the age of matirials in it
As of January 2009, the USA has produced 60,000 metric tons of nuclear waste in 60 yesrs of operating 104 nuclear power plants.
on average how much waste is produced by each plant on a monthly basis?
a. 0.8 tons p. month
b. 83.3 tons p. month
c. 104 tons p. month
d. 866.3 tons p. month
Answer: a. 0.8 tons p. month.
Explanation:
Given: Total nuclear waste = 60,000 metric tons
Time take = 60 years = 12 x 60 months [ 1 year = 12 months]
= 720 months
Total nuclear power plants = 104
Now , Average waste produced by each plant = [tex]\dfrac{\text{Total waste}}{\text{Time x Number of plants}}[/tex]
[tex]=\dfrac{60000}{720\times104}\approx0.8\text{ tons per month.}[/tex]
Hence, 0.8 tons p. month is produced by each plant.
So, option a. is correct.
Answer:
A on edge 2021
Explanation:
According to the passage, as a result of a mutation, an organism
A
will most likely die.
B
will receive chemical radiation.
С
may evolve for better survival.
D
may be duplicated.
Answer: C
Explanation:
According to the passage, as a result of a mutation, an organism may evolve for better survival. The correct option is C.
What is mutation?The mutation is a condition in which genes and DNA sequence changes. Mutation occurs due to mutagens. These mutagens can be biological or chemical. Cells come in contact with these mutagens and undergo mutation.
The mutation causes diseases, due to changes in DNA sequence and genes. People die due to mutation. Sometimes mutation causes the birth of new genes and traits in an organism.
So, in the given condition, the organism will evolve new traits that can be good or necessary for the better survival of the organism. The passage is talking about radiation.
Therefore, the correct option is С, which may evolve for better survival.
To learn more about mutation, refer to the link:
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The question is incomplete. Your most probably complete question is given below:
When a cell divides to grow into two new cells, the double helix splits into two single strands of chromosomes, each of which can then replicate a mirror image of itself. This process, called mitosis, happens every time a cell divides, except for sex cells preparing for sexual reproduction. The result is two new cells, each with a double helix of DNA strands identical to that of the original cell.
Though rare, sometimes an error occurs in this process, resulting in a mutation. Radiation or the appearance of other chemicals can increase their frequency. Sometimes an extra base is inserted, substituted, deleted, or damaged. Usually, these mistakes repair themselves, but sometimes they remain and, as a result, can create a change in the coding for a specific trait. If the new trait helps the organism survive, it may be duplicated and passed on to offspring, which, in time, may lead to an evolution in the organism.
Question 1 (1 point)
Use coefficients to balance the following reaction:
Na + 02 → Na20
Blank 1:
Blank 2:
Blank 3:
Answer:
Blank 1: 4
Blank 2: 1
Blank 3: 2
Explanation:
The unbalanced reaction expression is given as:
Na + O₂ → Na₂O
Now, we use a mathematical approach to balance the reaction given above.
Assign coefficients a , b and c for the blanks:
aNa + bO₂ → cNa₂O
Conserving Na : a = 2c
O: 2b = c
So, let c = 1, a = 2 and b = [tex]\frac{1}{2}[/tex]
Multiply through by 2;
a = 4, b = 1 and c = 2
4Na + O₂ → 2Na₂O
Blank 1: 4
Blank 2: 1
Blank 3: 2
Please help me, Thank you!
Answer:
Fe³⁺
Explanation:
When Fe²⁺ loses an electron, it becomes an Fe³⁺ ion.
The loss of an electron in an atom makes the atom becomes positively charged. Further losing electrons makes the atom more positive.
For the given ion;
Fe²⁺ if it loses an electron more, it becomes Fe³⁺.
The expression is given as:
Fe²⁺ → Fe³⁺ + e⁻
What are all the elements in a column called? NO LOOKING IT UP and if u do put it in ur words
Answer:
There have been seven horizontal rows of elements are called phases in the periodic table of elements. Groups, or families, are called vertical columns of elements. Metals, – anti, and metals are the most common ways of classifying the periodic table.
Explanation:
How might a chef use chemistry?
A. Chemistry can help a chef understand how to combine different
ingredients in a recipe.
B. Chemistry can help a chef understand how to present food
artistically
C. Chemistry can help a chef understand how heat is transferred in
ovens.
D. Chemistry can help a chef understand which recipes are healthy
Answer:
A. Chemistry can help a chef understand how to combine different ingredients in a recipe.
Explanation:
Knowing the chemical reactions between ingredients used in cooking helps chefs understand how well different ingredients would react to eachother.
*Im pretty sure this is correct.
Use the drop-down menus to complete the statements.
A segment of DNA is called a
.
A complex of nucleic acids and proteins that make up chromosomes is called
.
A structure in the nucleus of an eukaryotic cell that is made up of condensed DNA is called a
.
A segment of DNA is called a gene.
A complex of nucleic acids and proteins that make up chromosomes is called Chromatin
A structure in the nucleus of an eukaryotic cell that is made up of condensed DNA is called a chromosome.
Answer:
1. Gene
2. Chromatin
3. chromosome
Explanation:
I hope this helps you :)
What makes a pure substance different from a heterogeneous mixture? (4 points)
Explanation:
Pure substances are elements and compounds. These substances have the following properties:
All parts are the same throughout which implies that they are homogeneous. They have a definite composition. They cannot be easily separated or broken down into simpler substances by physical meansSeparation by physical means is not possible They have unique sets of physical properties.Heterogeneous mixtures have completely opposite properties as the pure substances as given above.
Which generates waves that are capable of traveling through a vacuum?
a light bulb
O a speaker
earthquake activity
volcanic eruption
Answer:
Light bulbs
Explanation:
light waves are electromagnetic waves which can travel through a vacuum
What does the term "resolution" mean
Answer:
there's two
Explanation:
resolution means:
a decision to do or not to do something
resolution also means:
the quality of being determined
16.
Which of the following elements is a metalloid?
a. As
c. Br
b. Se
d. Kr
Answer:
a. As
Explanation:
4 Cu2S
How many sulfur atoms are shown?
Answer:
there are 4 sulfur atom.
6. It took me 3 hrs to drive to the next city at the speed of 48km/h. How far a way are the cities?s
Answer:
speed = 16 kilometers per hour
= 16 km/h
Explanation:
Mark brainliest plssssss
Which of the following is the correct equation for the reaction below?
One molecule of propane gas reacts with five molecules of oxygen gas to form three molecules of carbon dioxide gas and four molecules of water vapor.
A. CzHg (g) + 502 (9) ► 3C02 (9) + 4H20 (9)
B. C3Hg (s) + 502 (s) — 3CO2 (s) + 4H20 (3)
C. CH (9) + 502 (9) — 3C02 (9) + 4HO (9) D. CzHg (9) + 50 (g) → 3C0 (g) + 4H20 (9)
need asap
Answer:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Explanation:
One molecule of propane gas reacts with five molecules of oxygen gas to form three molecules of carbon dioxide gas and four molecules of water vapor.
To every chemical equation, there are products and reactants:
Reactants → Products
Here:
Reactants:
1 mole of propane = C₃H₈
5 mole of oxygen gas = 5O₂
Products;
3 mole of CO₂ = 3CO₂
4 moles of water vapor = 4H₂O
The reaction equation is therefore;
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Answer:
C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)
Explanation:
This is the actual answer
a microscope is a labolatory tool that is used to__________ this allowed scientists to ____________ we cannot see using our naked eyes such as _____ protists ______and___________ the main parts of a microscope that magnifies are the __________ and the ___________. the__________ serves as the light source. in order to see he specimen clearly the stage needs to be adjusted at the right distance from the lens. this is done using the __________ and _______. other parts of the microscope such as the______. ______ and _________ serves as a primary support for device
Answer:
See the answer below
Explanation:
A microscope is a laboratory tool that is used to magnify the image of objects This allowed scientists to study tiny organisms that cannot be seen with an ordinary eye. We cannot see some organisms using our naked eyes, such as bacteria, protists, viruses, and microscopic fungi. The main parts of a microscope that magnifies are the ocular and the objective lenses. the lamp serves as the light source. In order to see the specimen clearly the stage needs to be adjusted at the right distance from the lens. this is done using the coarse and the fine adjustment knobs. other parts of the microscope such as the base and the arm serve as primary support for the device.
The microscope is primarily designed to magnify the image of objects and, thus, enables one to see objects that cannot ordinarily be seen with the naked eyes. It magnifies objects using a system of lenses in the ocular and the eyepiece. Microscopic organisms such as protists, bacteria, viruses, microscopic fungi and algae can be seen using the microscope. Slides of objects are prepared and placed on the stage of the microscope and the coarse/fine adjustment knobs used to adjust the stage in order to bring the image on the slide into focus through the ocular. A lamp at the base provides the light source for the light microscope while other parts such as the arm, the head, and the base provide supportive functions for the microscope,
The description, features and function of a microscope can be found explained below.
MICROSCOPE:
A microscope is a laboratory tool that is used to magnify images. This allows scientists to study tiny organisms that cannot be seen with the naked eye. We cannot see some organisms using our naked eyes, such as bacteria, protists, viruses, and microscopic fungi. The main parts of a microscope that magnifies are the eye and objective lenses. The lamp serves as the light source. To see the specimen clearly the stage needs to be adjusted at the right distance from the lens and this is done using the coarse and the fine adjustment knobs. Other parts of the microscope such as the base and the arm serve as primary support for the device.Learn more at: https://brainly.com/question/18661784?referrer=searchResults
Please help and I will give brainliest!
I am going to put them in order
R r
R RR rR
r rR rr
A group 2 metal carbonate has a mass of 84 g/mol. Identify the group 2 metal X using its chemical formula.
Please show your working out. number of moles in 0.3g of calcium carbonate.
Answer:
Magnesium
0.003mole
Explanation:
The problem here entails we find the metal in the carbonate.
For group 2 member, let the metal = X;
The carbonate is XCO₃;
If we sum the atomic mass of the elements in the metal carbonate, we should arrive at 84g/mol
Atomic mass of C = 12g/mol
O = 16g/mol
Atomic mass of X + 12 + 3(16) = 84
Atomic mass of X = 84 - 60 = 24g/mol
The element with atomic mass of 24g is Magnesium
B.
Number of moles in 0.3g of CaCO₃:
Molar mass of CaCO₃ = 40 + 12 + 3(16) = 100g/mol
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Number of moles = [tex]\frac{0.3}{100}[/tex] = 0.003mole
DUE IN A FEW!!!!!! PLS HELP
Answer:
the answer is is C 465 grams
The wavelength of the violet light emitted from a hydrogen atom is 410.1 nm. This light is a result of electronic transitions between the n = 5 and n = 2 energy levels. How much higher in energy is the n = 5 energy level than the n = 2 energy level?
Select one:
a. 3.000 x 108 J
b. 1.114 x 10-14 J
c. 2.436 x 10-18 J
d. 1.616 x 10-36 J
e. 4.847 x 10-19 J
Answer:
e. 4.847 x 10-19 J
Explanation:
From the given information:
The equation connecting the photon energy and the wavelength is:
[tex]E_{photon } = \dfrac {hc}{\lambda}[/tex]
where;
[tex]planck's \ constant \ (h)[/tex]= 6.626 * 10 ^{-34} J.s
[tex]velocity \ of \ light \ (c)[/tex] = 3.00 * 10^8 m/s
wavelength [tex]\lambda = 410.1 \ nm \times \dfrac{10^{-9} \ m}{1 \ nm}[/tex]
[tex]\lambda = 4.101 \times 10^{-7} \ m[/tex]
To determine the photon energy of violet light
[tex]E_{photon } = \dfrac {(6.626 \times 10^{-34} J/s ) \times (3.00 \times 10^8 \ m/s) }{4.101 \times 10^{-7} \ m}[/tex]
= 4.847 × 10⁻¹⁹ J
3. An unknown compound was found to have a molar mass of 75.0 g/mol and to
contain 32.0% carbon, 6.7% hydrogen and 18.7% nitrogen. The rest of the molecule
consists of oxygen. What is the molecular formula of the compound?
The balanced equation below shows the products that are formed when butane (C4H10) is combusted.
2C4H10 + 1302 ——>8CO2 +10H20
What is the mole ratio of butane to carbon dioxide?
2:8
1:5
13:8
13.:10
Answer:
2:8
Explanation:
The reaction equation is a given as:
2C₄H₁₀ + 130₂ → 8CO₂ + 10H₂O
From the reaction equation, the mole ratio is 2:8
Butane is C₄H₁₀
Carbon dioxide CO₂
From the reaction;
2 moles of butane will produce 8 moles of carbon dioxide
Answer:
A) 2:8
Explanation:
Took the quiz and was right
How many more electrons than lithium does an atom of sodium have?
Answer:Each lithium atom provides one. You can see that the oxygen atom has eight electrons (6 of its own, and one from each lithium), and the two lithium atoms have two electrons each.
Explanation:
Part C
Why do you use the same amount of baking soda and same amount of liquid for each combination?
Answer:
because you might have a too much bigger than explosion if you add more baking soda or vinegar
Explanation:
You use the same amount of baking soda and the same amount of liquid for each combination for the explosion.
We know that,
When you use the same amount of baking soda and the same amount of liquid for each combination then be get the explosion.
Baking soda and liquid are base and acid so they react chemically.
Here, the given liquid is vinegar
If you will increase the amount of baking soda and if you will increase the amount of liquid then no reaction
So, you use the same amount of baking soda and the same amount of liquid for each combination for the explosion.
Reference:
https://brainly.com/question/22409111
Hydrogen and oxygen are examples of which of these?
elements
compounds
none of the above
molecules
I need to know astroides
1) What are renewable energy sources?
Resources that will never run out.
W
Resources that will run out eventually.
They are new resources we have never used before.
O What is a resource?
Data collected that describes the quality of the data set is called _______ data.
quantitative
qualitative
mode
mean
An investigation where you compare objects to find a relationship is a(n) _______.
control group
descriptive investigation
comparative investigation
If the number 5 occurs with the most frequency in the data set, it is called the _________.
qualitative
mode
mean
median
Answer:
1. Qualitative.
2. Comparative investigation.
3. Mode.
Explanation:
1. Data collected that describes the quality of the data set is called qualitative data. This data type are non-numerical in nature i.e they are categorical. Some examples are excellent, poor, gender, religion etc.
2. An investigation where you compare objects to find a relationship is a comparative investigation. For example, a researcher trying to find out which bag is heavier by determining their weight.
3. If the number 5 occurs with the most frequency in the data set, it is called the mode.
For example, given A = (1, 5, 2, 5, 1, 5 4, 5). The mode is 5 because it appeared the most i.e four (4) times.
I WILL GIVE U BRAINLIEST IF UR CORRECT
Which of the following is always a result of a chemical reaction?
Hint: The questions says always.. only one best answer
A. Bubbles
B. Fire or smoke
C. Temperature change
D. A new substance
Answer:
D: a new substance
Explanation:
Chemical reaction
A change in matter that produces on or more new substances
Answer:
D. A new substance is always a result of a chemical reaction.
Explanation:
In a chemical reaction, one or more reactants reacts/decomposes to form one or more products.
