Chemistry High School

WILL MARK BRAINLIEST!!!
*please answer correctly*

WILL MARK BRAINLIEST!!!*please Answer Correctly*

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Answer 1

Answer:

Your answer is 344,758.168519

Explanation:

Related Questions

Write the formula: carbon hexabromide

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Answer: C2Br6

Explanation:

Omg please help me im doing so well in science i have a 100 and this if for a grade and i really need t o kkeep that 100

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Answer:

b

Explanation:

This means that it takes more energy or heat to increase water's temperature than it does for most other substances. The specific heat of water is greater than that of dry soil, therefore water both absorbs and releases heat more slowly than land.

Please help me I don’t understand

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Living. Non-living
Animals. Fake flowers
Trees. Plastic
Plants. Water
Humans. Paper

heat alwais moves from ____ to _____.

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Answer: left to right

Explanation:

Left to right just looked it up

Which of the following best describes the Earth's movement around the sun?

A)The Earth is closer to the sun in Summer than in Winter.

B)The Earth moves in a circular pattern around the Moon

C)The Earth's axis moves back and forth, resulting in different seasons

D)The Earth moves in an elliptical orbit around the sun

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Answer:

D)The Earth moves in an elliptical orbit around the sun

The  statement earth moves in an elliptical orbit around the sun best describes the movement of earth around the sun.

What is earth?

Earth is the third planet of the solar system and the only astronomical object known to support life.

What is an elliptical orbit?When an object moves around another object in an oval shaped path, it is known to be revolving in an elliptical orbit.The orbit is elliptical because of Newton's law of gravity.The planets in the solar system orbit the sun in elliptical orbits. Many satellites orbit the Earth in elliptical orbits as does the moon.

The movement of the earth around the sun in a fixed path or orbit is called Revolution. The axis of the earth which is an imaginary line, makes an angle of 66½° with its orbital plane.

Hence, option D is the correct answer.

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Which layer of the atmosphere is directly above the troposphere?
exosphere
stratosphere
troposphere
mesosphere

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Answer:

stratosphere is directly above troposphere I think

The answer is stratosphere.

The sum of the atomic masses for any compound is the compound’s:
Empirical mass
Compound mass
Atomic mass
Molar mass

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The correct answer is molar mass

For the following elements (Group 1A), Li, Na, K, Rb), which atom is larger overall?

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Answer:

The smallest atom you have listed would be lithium (Li).  

Explanation:

Lithium is the third smallest atom listed on the periodic table of the elements.  It has an atomic number of three, meaning it has three protons in it's nucleus.

Atom size (Atomic radius) increases from UP to DOWN in the same COLUMN(group) of the periodic table. For example, in the first group, the Atomic radius trend from smallest to greatest is: H (smallest) -- Li  -- Na -- K -- Rb -- Cs -- Fr (greatest).

Reason is, the increasing energy level (increases from n=1 to n=7) causes the shielding effect increase dramatically. And since the size of atom is mostly consist of electrons, more energy level is filled, the larger the atom will be.)

However, in the same ROW from left to right, the atomic size decreases as the number increases.   For example, Li #3, is larger than Flourine (F) with an atomic number 9 because they are on the same ROW.

Find a periodic table and look for the atomic mass of sodium, Na. What is it?

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Answer:

Atomic mass: 22.989769 u

Explanation:

The pressure and temperature of N² and gas drops from 303kPa at 300K to 202²kPa at -73°C. If the initial volume is 2L, find the new volume.

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Answer:

Gjvb

Explanation:

Using the combined gas law equation as follows:

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (kPa)

P2 = final pressure (kPa)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to this question;

T1 = 300K

T2 = -73 + 273 = 200K

P1 = 303kPa

P2 = 202kPa

V1 = 2L

V2 = ?

Using the above formula:

303 × 2/300 = 202 × V2/200

606/300 = 202V2/200

Cross multiply;

606 × 200 = 300 × 202V2

121200 = 60600V2

V2 = 121200/60600

V2 = 2L

The new volume is 2L

How many moles of a gas sample are in a 5.0 L container at 373 K and 203 kPa?


0.33 mole

0.66 mole

1.11 moles


3.05 moles

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Answer:0.33

I'm not sure tho

Answer:

0.33

I just took the test.

Does the following compound contain a polyatomic ion? Na2SO4
Yes
No

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The answer is yes I believe so.

The movement of broken down pieces of rock from one place to another is called

A. Deposition
B. Erosion
C. Weathering
D. Sediment

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Answer:

The answer I believe is B. Erosion

Explanation:

Just sounds better than all the other choices.

Answer:

erosion b

Explanation:

it breaks down the rocks i remembered this in 4th grade :)

revolver features several firing chambers located within...

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Answer:

What are the characteristics of a revolver?

Explanation:

The revolver features several firing chambers located within a revolving cylinder. The cylinder rotates as the revolver is fired, lining up each bullet mechanically.

a train is climbing a gradual hill. the weight of the train creates a downhill force of 150,000 newtons. friction creates an additional force of 25,000 newtons acting in the same direction (downhill). how much force does the train's engine need to create so the train is going uphill at a constant speed?

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Answer:

25000 is the answer

Explanation:

The answer is 25000 hope this helps you

25,000N is the total force, the train's engine need to create so the train is going uphill at a constant speed.

What is force?

A force in physics is an effect that changes the velocity of a mass-moving object, causing it to accelerate from rest, for example. It is a vector quantity since it can be a push or perhaps a pull and always has magnitude and direction. It is denoted by the letter F and is measured in newtons (N), the SI unit of force (formerly P).

The net force exerted on an object approximately equal to the rate where its momentum varies over time, according to the original formulation of Newton's second law.

The force by the train weight Fw= 150,000N

The force creates by the friction Ff=25,000N

total force =Fw + Ff

                = 150,000N+25,000N

                = 25,000N

Therefore, 25,000N is the total force.

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Does the following statement describe revolution or rotation?

When it is daytime in one area of the world it is nighttime on the opposite side of the world,

A)Rotation

B)Revolution

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Answer:

this describes rotation

Explanation:

rotation means spinning on an axis, revolution means going in a circle around an object. a year would be a revolution and a day would be a rotation.

it is rotation because because the earth is spinning every 24 hours

Please help I will give brainliest

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Answer:

Explanation:

c. - vaccine

b. - immunity

d. - phagocyte

f. - b cell

e. - t cells

a. active immunity

If you look up at the night sky long enough, the stars will appear to move across the sky. What is responsible for making the stars appear to move across the sky at night?

A. Earth's Revolution

B. Earth's rotation on its axis

C. Earth's position in its orbit

D. Earth's distance from the sun

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I’m very not sure but could be D

PLEASE HELP ME RNNNN!!! A specific characteristic, such as blue eyes, is known as a *

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Answer:

A trait is a specific characteristic of an organism. Traits can be determined by genes or the environment, or more commonly by interactions between them. The genetic contribution to a trait is called the genotype.

Explanation:

if not then its a feature,

PLEASE HELP!!!
How many grams of water could be vaporized (boiled) with 4590 Joules of heat?

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Answer:

6

Explanation:

HELPPPPPPPPPPP HELPPPPP HELP ​

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Answer:

calcium chloride and water

Explanation:

the reaction absorbed energy which means endothermic

Why is nuclear energy considered a nonrenewable resource?
Nuclear radiation does not run out.
It comes from radiation from the sun.
Uranium ore is replaced on a geologic timescale.
Uranium replenishes more quickly than it is being used.

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Answer:

You could classify nuclear energy as nonrenewable because uranium and similar fuel sources are finite. On the other hand, some people consider nuclear energy renewable because the element thorium and other new technologies may provide infinite fuel needed to power nuclear reactors.

pls help 6th grade science

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It’s A because it running more faster the the zebra

LAB REPORT
Lab: Charles law
I don’t know how to do this someone pls help I’m so behind I’m crying

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I don’t know the specifics of the lab but for a lab report you can find really good templates online. Start with an introduction that includes the question that the lab is trying to answer and include your hypothesis, your independent and dependent variables. Sometimes there may be a paragraph for any background information that was given previously but thats not always needed. Next paragraph have the material needed for the lab even if the lab is virtual and the procedures/ any safety guidelines that need to be included. Next paragraph have the data and any charts or graphs that were in the lab as well as your analysis of them. Say if your hypothesis was proven correct by the lab or not. Then have a concluding paragraph that restates the question that needed to be answered in the beginning, with the answer. Sometimes with the conclusion they may want a real world application for the results but again not necessarily. I hope this can help you. Good Luck!

Answer:

The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius

Explanation:

Something that is made out of natural resources for human use is called

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Answer: Man Made Resources?

Explanation: Its when humans create their own things.

_____ is responsible for bringing gravity into modern science.

Isaac Newton

Galileo Galilei

Albert Einstein

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Isaac Newton is the answer

True or false; when something heats up, New energy is created, and when something cool down, Energy is destroyed.

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Answer:

This is false.

Explanation:

This statement directly opposes the first law of thermodynamics which states that energy can neither be created nor destroyed, but can transfer from one source to another.

Describe how PERIODS and GROUPS are set up on the Periodic Table of Elements.

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Answer:

Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.

(Love your pfp btw)

Explanation:

The general oxidation of a metal ( M ) by a copper ion ( Cu2+ ) is M(s)+Cu2+(aq)⟶M2+(aq)+Cu(s) All the listed metals can be oxidized by Cu2+ ions but the reactions will occur at different rates. Arrange the metals based on how quickly each oxidation by Cu2+ ions should occur.

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Answer:

Ba, Ca, Mn, Ni

Explanation:

Jamal's class is observing how different substances are affected by physical and chemical changes. What evidence might indicate that a chemical
change has occurred? Choose the three correct answers.

A. release of heat


B. change in temperature


С. color change



D. new smell


Answers

C . Change in temperature

The change in color might indicating the formation of a new product. Hence, the color change indicates a chemical change.

What is chemical change ?

A chemical change involves the breaking/ making or both of chemical bonds. Chemical changes results in formation of new products that have different properties and structure from the initial substances.

A physical change include change in size, shape, state etc. All phase changes such as melting, boiling, freezing are physical changes. Evolution or absorption of heat, conductivity, solubility etc are physical changes.

A change in color indicates that a new product with different color is formed in the system. Therefore, option c color change indicates a chemical change.

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