Answer:
Answer the following questions: What is the composition of air? Answer: Air is composed of nitrogen, oxygen, carbon dioxide, many other gases, water vapour and dust particles. Which gas in the atmosphere is essential for respiration?
Explanation:
Answer:
poop
Explanation:
cus poop
What do you think it means to use science to answer a question?
*ANSWER AND ILL GIVE YOU BRAINLIEST ANSWER*
Answer: Science is an accurate measure of whats true, there are laws of science like physic, and mathematics and you can prove your answer by using science
Explanation:
how many energy levels do aluminum, argon and sodium have?
plz help
Answer:
aluminum - 3,argon - 3,sodium - 3
Explanation:
12. Which of the following species has the
least mass?
A. Electron C. Hydrogen ion
B. Helium atom D. Neutron
13. The mass number of an element whose
atom contains 13 electrons, 13 protons and
14 neutrons is
A. 13 B. 26 C. 27 D. 40
14. Which of the following elements exhibits
variable oxidation states and forms
12.electrons
13.13
14.aluminum has 14 neutron.
1. Which atom contains exactly 16 neutrons?
A S-33
B P-31
C O-16
D Cl – 35
2. In a mass spectrometer
A Particles with the most mass are deflected the most
B Particles with the least mass are deflected the most
C Particles with the least mass are deflected the least
D All particles are deflected the same
3. Calculate the mass, in grams, of 3.00 moles of carbon.
A 3.00 grams C
B 18.0 grams C
C 36.0 grams C
D 54.0 grams C
4. Calculate the number of moles of aluminum in 65 grams of aluminum?
A 2.4 moles Al
B 5.0 moles Al
C 850 moles Al
D 1800 moles Al
5. Calculate the number of atoms of sodium in a 4.5-gram sample.
A 1.2 x 1023 atoms Na
B 2.5 x 1023 atoms Na
C 1.7 x 10-22 atoms Na
D 3.1 x 1024 atoms Na
Answer:
1. B 2. B 3. C 4. A 5. A
Explanation:
1 Which atom contains exactly 16 neutrons?
Neutrons = Mass Number - Proton
A -33;
Neutrons = 33 - 16 = 17
B P-31
Neutrons = 31 - 15 = 16 Correct option
C O-16
Neutrons = 16 - 8 = 8
D Cl – 35
Neutrons = 35 - 17 = 18
2. In a mass spectrometer, the heaviest particles are least deflected and that with the least mass are deflected the most. The correct option is B.
3. 1 mol of C = 12 grams;
3 mol = x
x = 3 * 12 = 36 grams Correct option is C
4. 1 mol = 27g of Al;
x mol = 65g
x = 65 / 27 = 2.4 moles. Correct option is A.
5. There are 6.022 x 10^23 atoms in 23 grams of sodium;
x atoms in 4.5g
x = 6.022 x 10^23 * 4.5 / 23 = 1.2 x 10^23 atoms Correct option is option A.
The nucleus contains protons and neutrons true or false?
Answer:
the answer is
it's true
Answer:
true
Explanation:
it has both neutrons (neutral) and protons (positive)
who can answer questions 5 and 6
Explain how a mutation becomes an adaptation.
Answer:
An adaptation occurs if a mutation helps an individual survive and reproduce.
Explanation:
Over generations, the mutation will become more common. An adaptation occurs if a mutation isn't passed on to offspring. Hope this helps! xx
Anwser theses questions please (extra points!)
Question 4 (4 points)
(01.06 LC)
Water is an example of a mixture because it is made up of hydrogen and oxygen atoms bonded together. (4 points)
O True
O False
Answer:
False
Explanation:
The mixture is defined as a chemical substance formed by the combination of two or more substance but do not form any bond together.
Water is not a mixture because the water molecule is consists of two hydrogen (H2) atoms and one oxygen (O) atom bonded together with hydrogen bonds.
Hence, the given statement is "false".
7.00 x 10^2 divided by 2.00 x 10^4
Answer:
3500000
Explanation:
describe the motion of objects that are viewed from your reference frame from both inside and while you travel inside a moving vehicle
Answer:
They don't move
Explanation:
it may look like they move but you are moving and you are passing the objects so they are not moving other wise things like some trains or animals they move with you. I hope this helps! :D
The motion of objects that are viewed from your reference frame from both inside and while you travel inside a moving vehicle are not moving. It seems that way because the car you are in is moving, but the surrounding things aren't moving unless they are people, animals, or other cars.
What is motion ?An object changing its position with regard to time is referred to as motion. In mathematics, displacement, distance, velocity, acceleration, and speed are used to explain motion.
Motion is the shift in an object's location with regard to time. Motion includes things like a book tumbling off a table, water running from the faucet, rattling windows, etc. Even the air we breathe has motion to it! The entire universe is in motion.
Because the two observers are using distinct frames of reference, the observations differ. Different frames of reference move in relation to one another. A frame of reference is a collection of coordinates that may be used to calculate the locations and velocities of objects within it.
Thus, The motion of objects that are viewed from your reference frame from both inside and while you travel inside a moving vehicle are not moving.
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What does the atomic mass come from on the periodic table?
The atomic mass comes from isotopes on the periodic table.
So far, he spent 3 hours reading the first 165 pages. If Kamal continues to read at the same rate, how many more minutes will he need to finish the 198-page book?
Answer:
36 minutes
Explanation:
You take 165/3= 55 pages per hour.
Take 198-165 = 33 pages left of the book
Take 33/55 = .6 hrs to finish the book.
Take 60(minutes in an hour)*.6= 36 minutes
Which statement about the electron cloud model is ttue
What are the key differences between dependent and independent variables? *
Which atom has a configuration that ends in 5s 2?
Answer: Zirconium [Kr]4d :)
Explanation:
Atoms of hydrogen can become helium atoms during a chemical reaction.
True
False
Answer:
false
in chemical reaction element doesnot change into another
Explanation:
A heterogeneous mixture is
Answer:
simply any mixture that is not uniform in composition - it's a non-uniform mixture of smaller constituent parts
Explanation:
i think it may wrong
. Select one resource and hypothesize what side effects might
occur if that
resource is depleted.
If not for human activity how long would carbon stay as fossil fuel
Answer:
1,000 years
Explanation:
1,000 years
According to the U.N. Intergovernmental Panel on Climate Change (IPCC), which issued a special report on CCS in 2005, a properly selected site should securely store at least 99 percent of the sequestered CO2 for more than 1,000 years.
You have 150 g of water (m). The specific heat of the water is 4.184 g/jC (c) . You heat the water and raise the temperature by 1 degree. How much heat did the water absorb?
Answer:
627.6J
Explanation:
q=mcΔT
where:
q = heat energy (J)
m = mass (g)
c = specific heat (g/j*C)
Δt = change in temperature (C/K)
q= (150)(4.184)(1) = 627.6
What is the difference between the dependent variable and the independent variable in an experiment?
An independent variable is the cause. Its value is independent of other variables in your study. A dependent variable is the effect. Its value depends on changes in the independent variable
Explanation:Variables are the factors or the numbers used as a quantity. The dependent variables are conditional, and the independent variable is the cause that affects the result.
What are dependent variables and independent variables?The independent variable of an experiment is the data that is the cause of the experimental design. Its value and result do not depend on other factors and conditions. These values are manipulative and are set by the researcher.
The dependent variables, on the other hand, vary based on the other factors and variables and are the effect that is based on the response and the outcome of the other variables. It is the tested or the measured value.
Therefore, the independent and dependent variables differ based on cause and effect.
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Which of the following is NOT a subatomic particle of an atom?
Neutron
Nuclear wall
Proton
Electron
Answer:
B
Explanation:
It is Nuclear wall which is the second one
I was wondering if this is correct?
Answer:
I believe you are correct
thats because All of the 2nd choices seem to be larger
Do you think the density of the rock models affects the melting rate? Why or why not? I said no, but I need help on the part that says why or why not. Please use your own knowledge. Looking it up won't help. I have tried. :)
Answer:
1) Yes the density does affect it's melting rate.
Explanation:
Simply because the more rock the more time. For instance an ice cube that is empty inside ( has less density ) will take less to melt. Verses an ice cube that is ice to its inner core ( has more density ) will take more time to melt in the same temperature as the first ice cube.
which compound forms 2 parts of hydrogen and 1 part of oxygen?
Answer:
water
for one molecule of water each atom has the atomic mass unit, u,shown.
Explanation:
*can i be the brainliest*
Imagine you need to explain to a friend how to convert a value on a food label to one that is measured in grams. Assume the package of food has a mass of 1.0 pounds. write an explanation for how to use dimensional analysis to convert this value to one expressed in grams.
Answer:
453.592 grams
Explanation:
Given
Mass = 1 lb
Required.
Convert to grams using dimensional analysis
Represent 1 lb with x g
In unit conversion, we have that.
1 lb = 453.592 g
So:
Getting the equivalent of lb in g, we have:
x g = 1 lb * (453.592 g/ 1 lb)
x g = 1 * 453.592 g
x g = 453.592 grams
Hence:
The equivalent of 1 lb in grams is 453.592 grams
Scientists use results from new experiments to
support their own personal political opinions.
increase precision of data that were collected previously.
modify existing explanations of how nature works.
aid in distinguishing science from pseudoscience.
Answer:
modify existing explanations of how nature works.
Explanation:
Scientists use new experiments to aid in distinguishing science from pseudoscience also to update the explanations of how nature works.
What is pseudoscience?Pseudoscience is the falls assumptions and predictions by some thoughts and prejudice that arguing to be scientific. For example astrology, there is no scientific evidence for that,
Scientists update the phenomenon and concepts in nature through various research works which are planed in advanced level. These results are not for personal requirements not for political opinions.
Thus new experiments are conducting for arriving at new information that are valuable to everyone and thus distinguishing science from pseudoscience.
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Need help with this
Answer:
Its enviormental science because enviormental science is an interdisciplinary academic field that integrates physical.
what number and types of atoms occur in a formula unit of CaN2O6
Answer:
One calcium, two nitrogen, and six oxygen
Explanation: