Chemistry High School

Please help me !!!!

Answers

Answer 1

Answer:

1) clouds 2) quick 3) near 4) levels 5)nucleus 6) two 7) eight 8) eighteen 9) pairs 10) properties

Explanation:

hope i helped!

Answer 2

Answer:

1. clouds

2. quick

3. near

4. levels

5. nucleus

6. two

7. eight

8. eighteen

9. pairs

10. properties

I do not know if I got 6-8 correctly but I got the other answers

Related Questions

An atom of hydrogen loses its electron. What is its charge

Answers

Answer:

When an atom of hydrogen loses its electron it becomes positively charged.

Hope it will help you........

Final Answer: +1

Explanation/Reasoning:

Because hydrogen is an atom (not an ion), you'll write it as H (not H+). Hydrogen (H) has one proton and one electron, so if it loses its electron, it will only have one proton. Therefore, it becomes an ion of H+. This means that the charge will be +1.

~I hope I helped you :)~

ill attach a picture

Answers

Answer:

35.50

Explanation:

There are two stable isotopes, 35Cl (75.77%) and 37Cl (24.23%), giving chlorine a standard atomic weight of 35.45

what causes a change in air pressure

Answers

This change in pressure is caused by changes in air density, and air density is related to temperature.

I need help with chemistry question?

Answers

Answer:

2Al + 3Na2SO4 -----> Al2(SO4)3 + 6 Na

Explanation:

Product should be Al2(SO4)3

Because Al contains +3 charge

And SO4 contains -2 charge

To balance this postive and negative charge we multiple +3 with 2 and -2 with 3

What chemical process occurs in cells to release energy?
A.
Oxidation

B.
Respiration

C.
Pespiration

D.
Nutrition

Answers

Answer:

B. Respiration

Explanation:

cellular respiration is the process where cells use glucose (C6H12O6) and oxygen gas (O2) to make carbon dioxide (CO2) water (H2O) and ATP, which is energy

formula:

C6H12O6 + 6O2 -> 6CO2 + 6H20 + 38ATP

Ublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water

Answers

Answer:

True

Explanation:

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage.

For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water which bypasses the conversion to liquid stage and goes straight to the gaseous form.

A green pea plant (Gg) is crossed with a yellow pea plant (gg). What is the probability that the offspring will be heterozygous?
A.25%
B.50%
C.75%
D.100%

Answers

Answer:

50 percent

Explanation:

G g

g Gg gg

since one of the plants are already heterozygous, only half will be heterozygous since the other plant is homzygous

There is 50% probability that the offspring will be heterozygous.

What is heterozygous?

At a given gene locus, the existence of two different alleles. One normal allele and one mutant allele, or two separate mutated alleles, can make up a heterozygous genotype (compound heterozygote).

what is allele?

An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome.

so, if green pea plant (Gg) is crossed with a yellow pea plant (gg), there will be 50% probability that the offspring will be heterozygous, we can find it by making punnett square so here is the solution

Hence, the correct option is B i.e. 50%

To know more about heterozygous here

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Why is it important to pasteurize certain liquids?

Answers

Answer:

Pasteurization involves heating liquids at high temperatures for short amounts of time. Pasteurization kills harmful microbes in milk without affecting the taste or nutritional value (sterilization= all bacteria are destroyed).

Explanation:

1. Se preparan 750 ml de una disolución en agua, que contiene 0,00071 moles de Nitrato de potasio para adobar una carne de res. Calcular la ppm de la disolución. 2. Una muestra de 600 ml de disolución tiene 4 mg de ión fluoruro (F-). Cuántas ppm de F hay en la muestra?. Ayudaaaaaa plis

Answers

Answer:

1. 95.7 ppm

2. 6.67 ppm

Explanation:

Podemos pensar la denominación ppm como partes por millón, es un tipo de unidad que define concentración de solutos en una solución.

ppm = μg/g o si lo queremos ver en volumen, μg/mL

Quiere decir microgramos de soluto en 1 g de solución o mL de solución.

Ej 1. En primer lugar convertimos los moles de KNO₃ a gramos

0.00071 mol . 101.1 g/mol = 0.071781 g

Si pasamos los gramos a μg → 0.071781 g . 1000000 μg/ 1g = 71781 μg

Dividimos 71781 μg /750 ml = 95.7 ppm

Ej 2. Convertimos los mg a μg → 4 mg . 1000 μg/ 1 mg = 4000 μg

Ahora dividimos: 4000 μg /600 ml = 6.67 ppm

guys help please. A rigid container holds a gas at a pressure of 55 kPa and a temperature of -100.0°C. What will the pressure be when the temperature is increased to 200.0°C?

Answers

Answer:

It’s 150 C :)

Explanation:

Please Answer ASAP!!
What happens to the velocity of an object when balanced forces act on it?
a.
There will be no change
c.
There will be negative acceleration
b.
There will be positive acceleration
d.
Velocity will change, but not acceleration

Please select the best answer from the choices provided

Answers

Answer:

C. There is a negative acceleration

Explanation:

I majored in Physics

what happens when exhaled air passes through clear lime water?

Answers

Huh what type of question is that?!

In a living cell which process uses up atp

Answers

Answer:

Metabolism

Explanation:

because energy change takes place

Which statement is true about a reaction represented by a chemical equation that shows energy as a reactant?

A.
It absorbs energy.

B.
It releases energy.

C.
It is a replacement reaction.

D.
It is a combustion reaction.

Answers

A. It absorbs energy.
reactants are located on the left side of the equation, meaning energy among with other reactants were needed to get the reaction going, so it absorbed energy, which is also the endothermic process. The opposite of that would be having energy on the right side with the products which means that the reaction would've released energy which is the exothermic process. Hope this helps!

Which one has the greatest mass, Hg or Co?

Answers

Answer:

Explanation: I just took the test

what did bohr consider electrons as?

A. Discrete particles
B. Continuous particles
C. Particles with zero energy
D. None of the above

Answers

Answer:

Explanation:

I think D hmm is the answer if I am wrong pls anyone or someone type the right answer but for me is d

Answer:

NOT D!!!!

Explanation:

I am taking the quiz on ck12, it is NOT "none of the above"

The sum of the atomic masses of all the atoms in a compound is called the

Answers

Formula Mass ( sorry need twenty characters)

please help ASAP it is maybe easy for you!!!

Answers

Answer:

the answer is C, 30g

A small windmill is to be built at a science competition. A large floor fan is used to power each windmill The task
is to lift a bucket filled with the most number of pennies possible from a height of one meter in one minute.
Which change in decision would most likely increase the weight that the windmill could lift?
A)
Make the fan blades smaller.
B)
Make the arms of the windmill longer,
C)
Make the arms of the windmill shorter
D)
Make the fan blades out of a lighter material.

Answers

Answer:

Explanation:

I'm doing USA test prep and I got it right

Answer:

Explanation:

It is D

Make the fan blades out of a lighter material.

1. Suppose that there were two isotopes of Sodium.
28% of the naturally occurring sodium atoms had a
mass of 22, and 72% atoms had a mass of 23. What
would the average atomic weight of sodium be?

Answers

Answer: C. The university surveys 600 randomly selected students who attend the university. Correct

Explanation:

22.72 is the average atomic weight of sodium.

What are isotopes?

Isotopes are different versions of a specific element.

1st isotopes of 22u = 28%

2nd isotopes of 23u = 72%

The average atomic weight of sodium be=

22 x 28 + 23 x72

=2272/100

=22.72

Hence, 22.72 is the average atomic weight of sodium.

Learn more about isotopes here:

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please help !!!!!!!!!!!

Answers

Answer:

Iron wood is very dense and will sink in water. B

Explanation:

Hope this helps!!

Answer:

Explanation:

A gymnast performing a backflip into a cartwheel on a balance beam is am example of ________ force

Answers

I’m gonna guess equal force sorry if I get it wrong <3

I have no idea how to do this help plz!

Answers

The answes are
C)
Then it is
)A
Im doing this for class too bruh

C A and B D . Sorry if I’m wrong

25cm3 of a 0.4M sodium hydroxide solution was diluted into 250cm3 of water. What is the molarityof the resultant solution.

Answers

Answer:

0.04 M

Explanation:

From the question given above, the following data were obtained:

Initial volume of solution (V1) = 25 cm³

Initial Molarity of solution (M1) = 0.4 M

Final volume of solution (V2) = 250 cm³

Final Molarity of solution (M2) =?

We can obtain the final Molarity of the solution by using the dilution formula as illustrated below:

M1V1 = M2V2

0.4 × 25 = M2 × 250

10 = M2 × 250

Divide both side by 250

M2 = 10/250

M2 = 0.04 M

Therefore, the resulting molarity of the diluted solution is 0.04 M

Could you use filtration on a solution?

Answers

Answer:

No.

Explanation:

This is because a solution is a mixture with two substances that have already dissolved in each other and so there is no residue left. Filtration works such that part of the mixture has smaller particles that can pass through the membrane of the filter paper while the bigger particles get stuck onto the paper as residue. A solution has a uniform size particle throughout and thus filtration does not work for purifying a solution.

what types of organisms are most likely to become extinct (characteristics)?

Answers

Many rare and/or endemic species exhibit one or more of the following attributes which make them especially prone to extinction: (1) narrow (and single) geographical range, (2) only one or a few populations, (3) small population size and little genetic variability, (4) over-exploitation by people

what method would you use for your hypothesis.

Answers

Diagram of the scientific method

What does the little ‘3’ in 2NH3 mean?

Answers

Answer:

It determines the number of molecules

Answer:

it means there are 3 hydrogen atoms in the compound.

How does dermal tissue play a key role in transpiration?

Answers

Answer:

Dermal tissue of the stems and leaves is covered by a waxy cuticle that prevents evaporative water loss. Stomata are specialized pores that allow gas exchange through holes in the cuticle. Unlike the stem and leaves, the root epidermis is not covered by a waxy cuticle which would prevent absorption of water.

Explanation:

The Earth's _____ provides protection from meteorite impacts by causing them to _____.

please leave a simple answer

Answers

Answer:

atmosphere, break up

Explanation:

Answer:

Atmosphere, break up

Explanation:

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