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

Answers

Answer 1

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.


Related Questions

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

Answers

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".

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.

Answers

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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I was wondering if this is correct?

Answers

Answer:

I believe you are correct

thats because All of the 2nd choices seem to be larger

What are the key differences between dependent and independent variables? *

Answers

Dependent variables are essentially what you are measuring and is kept the same, and the independent variable is what you change in the experiment

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​

Answers

12.electrons

13.13

14.aluminum has 14 neutron.

Need help with this

Answers

Answer:

Its enviormental science because enviormental science  is an interdisciplinary academic field that integrates physical.

. Select one resource and hypothesize what side effects might
occur if that
resource is depleted.

Answers

For example an oasis animals depend on water especially if there in the desert where it’s not as reach able and it drys up for a while. If this resource “depleted” the animals would not have anything to help them survive and plants would have that either. Hope that helps not really sure if it was on a specific resource so sorry if it’s wrong :(

who can answer questions 5 and 6​

Answers

1. C - fluorine
2. A - Potassium

What is the difference between the dependent variable and the independent variable in an experiment?

Answers

Answer:

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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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. :)

Answers

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.

Stars form inside giant clouds of gas and dust. What are these giant clouds of gas and dust called?
A.) Supernova
B.) Quasar
C.) nebula
D.) Black hole

Answers

They are called nebulas

which compound forms 2 parts of hydrogen and 1 part of oxygen?

Answers

Answer:

water

for one molecule of water each atom has the atomic mass unit, u,shown.

Explanation:

*can i be the brainliest*

If an object has a mass of 45g and a volume of 9 cubic centimeters, what is its density? been wroking forever
A.405g/cubic centimeters
B . 5g/ cubic centimeters
C > 4g/ cubic centimeters
0.2g/ cubic centtimeters

Answers

Answer:

The answer is option B

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass of object = 45 g

volume = 9 cm³

Substitute the values into the above formula and solve

We have

[tex]density = \frac{45}{9} \\ [/tex]

We have the final answer as

5.0 g/cm³

Hope this helps you

Answer:

the answer is B 5g/ cubic centimeters

Explanation:

to find the density you divide the mass by the volume

What is the correct measurement for solubility?

Answers

Other commonly used units include g/L (grams of solute per liter of solution) and m/L (moles of solute per liter of solution). Solubility units always express the maximum amount of solute that will dissolve in either a given amount of solvent, or a given amount of solution, at a specific temperature.

Atoms of hydrogen can become helium atoms during a chemical reaction.
True
False

Answers

Answer:

false

in chemical reaction element doesnot change into another

Explanation:

Falsee

Can’t change into another.

how many energy levels do aluminum, argon and sodium have?
plz help

Answers

Answer:

aluminum - 3,argon - 3,sodium - 3

Explanation:

Determine the correct number of sig figs in: 1650

Answers

Answer:

3 sig figs

Explanation:

Which statement about the electron cloud model is ttue

Answers

Ya where’s the problem of statement

which of the following is the correct equation for photosynthesis​

Answers

Answer:

6CO2 + 6H20 + ENERGY = C6H12O6 + 6O2

Explanation:

Carbon dioxide + water + energy from light produces glucose and oxygen

Which atom has a configuration that ends in 5s 2?

Answers

Answer:  Zirconium [Kr]4d :)

Explanation:

A heterogeneous mixture is

Answers

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

What do you think it means to use science to answer a question?

*ANSWER AND ILL GIVE YOU BRAINLIEST ANSWER*

Answers

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:

The nucleus contains protons and neutrons true or false?

Answers

Answer:

the answer is

it's true

Answer:

true

Explanation:

it has both neutrons (neutral) and protons (positive)

What does the atomic mass come from on the periodic table?

Answers

The atomic mass comes from isotopes on the periodic table.

which branch of science studies non-living things?

Answers

Answer: The branch of science you are referring to is Physical Science.

Answer:

physical science

Explanation:

Physical science is a branch of natural science that studies non-living systems, in contrast to life science.

Carbondioxide gas is't collectable in water. why​?

Answers

Answer:

carbon dioxide is a gas so it isn't collected over water.

Explanation:

it works for insoluble gases such as hydrogen,or gases that do not dissolve easily in water such as ammonia and chlorine are readily soluble in water and are not collected this way.

hope it is helpful for you.

Explain how a mutation becomes an adaptation.

Answers

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

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?

Answers

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

describe the motion of objects that are viewed from your reference frame from both inside and while you travel inside a moving vehicle

Answers

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.

To learn more about the motion, follow the link;

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If not for human activity how long would carbon stay as fossil fuel

Answers

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.

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