Chemistry High School

Can someone please help me with this, ill give you a heart, a five star rating, and the brainliest answer!​

Can Someone Please Help Me With This, Ill Give You A Heart, A Five Star Rating, And The Brainliest Answer!

Answers

Answer 1

Answer:

A not

B yes

C yes

D yes

Explanation:

A 2C 6H but 10O and 7O so no

B 3C 6O 2Fe on each side  so yes

C 4H 1S 6O 2Na so yes

D 2Ag 2Cl 1Ca 2N 6O so yes

Related Questions

What does converse mean

Answers

Answer:

engage in conversation.

Explanation:

Answer:  the process of changing or causing something to change from one form to another.

Explanation:

There are 0.5 moles of carbon, 1 mole of hydrogen, and 0.25 mol of
oxygen. What is the empirical formula of this compound?

Answers

Answer:

C₂H₄O

Explanation:

The empirical formula of a compound is defined as the simplest whole number ratio of the atoms present in a molecule. As we have in the molecule Carbon, Hydrogen and Oxygen to find the simplest ratio we need to divide each number of moles in the moles of Oxygen (The lower number). As follows:

C = 0.5mol C / 0.25mol O = 2

H = 1 mol H / 0.25mol O = 4

O = 0.25mol O / 0.25mol O = 1

The empirical formula is:

C₂H₄O

A car accelerates from 10 km/h to 80 km/h in 8.0 seconds. Determine the car’s acceleration in m/s2.

Answers

Answer:

The difference in velocity divided by rate = acceleration.

80 - 10 = 70km/h

60 sec. per hour, so 70 × 60 = 4,200 km/s

4.200/8=525

520/60 = 8.6666666667 km/h

Explanation:

Not the answer but hope it puts you in the neighborhood.

The resultant acceleration of the car is 2.43 m/s².

What is acceleration?

Acceleration is define as the rate of change of velocity with respect to the time and it will be calculated as:

Acceleration = Velocity / Time

Given that, velocity of car = 80km/h - 10km/h = 70km/h

As we know that 1 km = 1000m

and 1 hour = 3600 sec

So that 70km/h = 19.4 m/s

Given time = 8 sec

Now putting values on the acceleration equation, we get

Acceleration = 19.4 m/sec / 8sec = 2.43 m/s²

Hence required acceleration is 2.43 m/s².

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LINKING IN
TECHNICAL OBJECTS
1 a) What is linking?

Answers

Answer:

A link is a fastening unit that attaches two parts of an object together

Different types of links have different characteristics

Answer:

Linking is the process of combining all the component object files. The linker determines where the code will reside in memory and how control will transfer between the components.

Which of the three phases of matter solid liquid or gas has particles that are fast moving and independent of each other??? Also this is science class work

Answers

The answer is particles

The Answer is Solid

Explanation:

the particles in a solid are vibrating very fast and are packed together so they're independent one each other.


Intermolecular forces and Kinetic energy together help determine whether a substance will
be a solid, liquid, or a gas
True or false

Answers

Answer:

true

Explanation:

If
two open cans of different diameters were left
out in the rain, how would the amount of
water they collected compare? How would the
depth of water in the cans compare?

Answers

the can with the larger diameter would of course collect more water but the depths in the two cans would be equal. Steady rain falls at a rate of (perhaps) drops per square inch per minute.

How many elements are in H2O

Answers

Answer: bale 2 elements sya ang mga yon ay hydrogen at oxygen.

H2O is a molecule made of H for hydrogen and O for oxygen. There are 12 of these molecules. The smaller number is the number of atoms of the element to the left of it.

MARK ME AS A BRAINLIEST PLEASE

H₂O, which represents a molecule of water, consists of three atoms: two hydrogen atoms (H) and one oxygen atom (O). Therefore, H₂O contains a total of three elements: hydrogen and oxygen.

What is H₂O?

H₂O represents a molecule of water. The "H" stands for hydrogen, and the "O" stands for oxygen.

Hydrogen (H) is a chemical element with the atomic number 1. It is the lightest and most abundant element in the universe. Hydrogen atoms consist of a single proton in the nucleus and one electron in orbit around the nucleus.

Oxygen (O) is a chemical element with the atomic number 8. It is a highly reactive and abundant element, making up a significant portion of the Earth's atmosphere and the compounds found on Earth. Oxygen atoms consist of eight protons in the nucleus and eight electrons in orbit around the nucleus.

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please help with both of these lol

Answers

Answer: 1. Unbalanced

2. Atoms cannot be created or destroyed only rearranged

Explanation:

What is the best color? Personally I think its purple.

Answers

For me sunset orange is the best color, it’s a very peaceful and calm color
purple used to be mine as well. Now it’s red since my whole family is associated with the notorious street gang called the“bloods”.

Cobalt(II)chloride is commonly obtained from chemical supply houses as a hydrate with the formula CoCl2.6H2O. An analysis showed that 25.0g of this hydrate contains 11.3g of water. What us the present water by weight in this hydrate?

Answers

Answer:

The present water by weight for the hydrate = 45.2%

Explanation:

From the given information;

The present water by weight = (weight of the water/ total weight of the hydrate) × 100

The present water by weight = (11.3/25) × 100%

The present water by weight = 0.452 × 100%

The present water by weight for the hydrate = 45.2%

____33. When an atom undergoes gamma decay, the atomic number of the element
a. remains the same.
b. decreases by one.
c. increases by one.
d. increases by two.
____34. Radioactive materials change into new _______________ during radioactive decay.
a. compounds
b. atoms of the same material
c. elements
d. neutrons
____35. Nuclear fission is the:
a. Production of uranium.
b. Splitting of protons by bombarding them with neutrons.
c. Splitting of atoms by bombarding them with neutrons.
d. Result of neutrons smashing into each other.
____36. During fission:
a. Electrons are released and cause more fission.
b. Protons are released and cause more fission.
c. Uranium is produced.
d. Neutrons are released and cause more fission.
____37. Separating U-235 from U-238 was difficult because:
a. There was so much more U-235 than U-238
b. There was so much more U-238 than U-235.
c. A chain reaction would result.
d. They are chemically identical.
Part IV: True/False
____ 38. The mass of the nucleus is small compared to the mass of the atom.
____ 39. Alpha particles would be harder to turn than Beta particles.
____ 40. Positive charge was spread all throughout the atom in the Rutherford Model.
____ 41. The Manhattan Project was located in New York for most of its duration.
____ 42. The cathode rays produced by Thomson were identical for all filaments.
____ 43. It is possible to know where an electron is and what path it is on.
____ 44. X-rays are produced when fast moving electrons strike phosphor coatings.

Answers

Answer: Because only energy is emitted during gamma decay, the number of protons remains the same. Therefore, an atom does not become a different element during this type of decay. Q: The Figure below shows how helium-3 (He-3) decays by emitting a gamma particle.

Answer:

yes

Explanation:

33c     32 c     33d    34a       35  b   36a   37 d    

Question 13 (3 points)
.Which one of the following is not a scientific variable?
independent
statement
O control
dependent

Answers

The answer is the D. "Observation" is not a variable in an experiment.
Explanation: Research variables are factors that can be manipulated, measured or those that we try to explain through other variables. "Observation" is not a variable in an experiment, but it is the first step and fundamental part in the scientific method, in which the experiments are contained (experimentation stage). Observation is the information recorded during an experiment, obtained through the senses or through the registration of information on scientific instruments.

What is the density of a 32g toy car that
has a volume of 8cm3?
A. 256alcm3
An3

Answers

Answer:

density=mass/volume

density=32/8

density=4

30 points pls i need help
i need the right answer

Answers

Answer:

C

Explanation:

yes,

The answer is C I think

Please see the picture, I could really use some help!

Answers

Answer:

yo no se de eso preguntale a otro si

(c) Magnesium has atomic number 12.
Magnesium exists as magnesium-24, magnesium-25 and magnesium-26 atoms.
Explain, in terms of protons and neutrons, why these atoms are isotopes
of magnesium
(2)


PLEASE HELP URGENT

Answers

Answer: The magnesium 24, 25, and 26 atoms are isotopes because they all have the same number of protons but they have different mass numbers

Explanation: isotopes of an element have the same number of protons but different mass number. So for magnesium 24, the number of protons is 12 and the number of neutrons is 12.

For magnesium 25, the number of protons would still be 12 but the neutrons would be 13.

Magnesium 26, the number of protons would be 12 and neutrons number is 14

what element has the same number of valence electrons as argon

Answers

Answer: There are two elements actually and those elements are Carbon and Silicon

Explanation:Plz mark brainliest if im right

who is princess tianas best friend, if you can get her name right then ill give you brainliest

Answers

Answer:

Oo i think her name is Tiana..... ❤️❤️

Answer:

Charlotte La Bouff

Explanation:

"Lottie" if you will

3
Question 6 (2 points)
An increase in the level of carbon dioxide in the atmosphere would result in:

Answers

Answer:

Air pollution

Explanation:

Carbon(IV)oxide is sometimes harmful to man but good for plant in other to manufacture their food

Please help!! I'll name you brainliest!!

Answers

Answer:

D. in a covalent bound,electronics are shared.In ionic bounds

electrons are transfered

Explanation:

:) Hope this helps!!

The answer will be (D) hope this helps
May I get brainliest? :)

Which substance is made up of molecules that can have temporary dipoles?

a. CO2
b. NH3
c. N2
d. H2O

Answers

Answer:

Molecules that contain dipoles are called polar molecules and are very abundant in nature. For example, a water molecule (H2O) has a large permanent electric dipole moment.

so it is (D). H2O

Explanation:

Based on the nature of intermolecular forces, the molecule that can have a temporary dipole is nitrogen gas, N2.

What are temporary dipoles?

Temporary dipoles are created when electrons revolving around the nucleus, spontaneously come into close proximity resulting in an uneven distribution of electrons, thereby creating a temporary dipole due to unbalanced charges.

Temporary dipoles can initiate weak intermolecular attraction between neighboring molecules such as van der Waal's forces.

Temporary dipoles can occur in non-polar molecules such as nitrogen gas resulting in the ability of nitrogen to be liquefied.

Therefore, the molecule that can have a temporary dipole is nitrogen gas, N2.

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The photograph shows a way individuals work together in groups.
Which term best describes the kind of work shown in the photograph?

Answers

Answer: Postindustrial

Explanation:

I just took the test hope this helps: )

Answer: A: Postindustrial

Explanation:

Some molecules in air contain .
Explain how atoms from the air can become part of human cells

Answers

The atoms in air are combined with oxygen present in the air and when we inhale the air, oxygen is moved into the body then atoms in oxygen are carried by red blood cells the blood is pumped to the lungs and when oxygen is transported to the body organ, the atoms in lungs become the part of human cells.

(41). Which of the following molecules is (are) polar? For each
polar molecule, indicate the direction of polarity—that is,
which is the negative end, and which is the positive end
of the molecule.
(a) BeCl2
(c) CH3C
(b) HBF,
(d) SO3

Answers

Answer:

The oxygen is the negative end of the molecule, while the area between the hydrogen atoms is the positive end of the molecule. Figure 2. Water is a polar molecule, as greater electron density is found around the more electronegative oxygen atom.

Help pleaseedeeeeeeeeeeeeeeee

Answers

Answer:

the answer to this question here is A

Explanation:

trust me

Answer:

Acid and Salt

Explanation:

Common hydrogen compounds

Hydrogen combines with other elements, forming a number of compounds, including common ones such as water (H2O), ammonia (NH3), methane (CH4), table sugar (C12H22O11), hydrogen peroxide (H2O2) and hydrochloric acid (HCl), according to Jefferson Lab.

Which substance contains positive ions immersed in a sea of mobile electrons?

a. O2 (s)
b. CuO (s)
c. Ag (s)
d. SiO2 (s)

Answers

The substance, silver (Ag), we can see positive ions immersed in a sea of mobile electrons.

What is metallic bond?

The term metallic bond refers to the bonding between metal atoms. This bonding consists of positively charged ions and a sea of electrons bonded together electrostatically.

Hence, in the substance, silver (Ag), we can see positive ions immersed in a sea of mobile electrons.

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Explain why lithium fluoride is a solid at room temperature

Answers

Lithium fluoride is a solid at room temperature because it is a salt that is held together by ionic bonds. Lithium. fluoride has a giant ionic structure.

So What Happens to the Body When We Warm. Up?
Task 2: Fill in the gaps with the words on the next page.
We warm up to...
1. Gradually increase the heart rate and hence the blood flow to the muscles, supplying them
which allows them to work more intensively and efficiently with more elasticity
with
2. Remove waste fluid and waste products from the
cardiovascular system, e.g. helps to avoid a bulld-up of lactic acid
by acceleration of the
3. Increase the depth and rate of
ensuing exercise
required to achieve the appropriate level for
4. Increase the supply of
to the joints. This lubrication increnses the range of
notion in the joints and helps to decrease wear and tear,
5. Increase the body temperature giving increased muscle efficiency and
6. Improve
and dilate lopen up the skin vessels in
order to allow heat loss and body temperature to be maintained at safe levels.

Answers

Answer:

Option 1.

Explanation:

When we warm up, our heart rate increases and we require much more energy to continue. Hence, our body absorbs much more oxygen from the surroundings, digest food and etc.

Sorry if the explanation might sound wrong, I learned this during science 2 years ago so I forgot.

NEED HELP ASAP!!!
Please choose correctly!!

Will mark brainliest thank you!!!

Answers

you will have a excess gas
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Sarah has two quarters in her pocket, one from Florida and one from Georgia. She randomly pulls one quarter from her pocket, looks at it, and puts it back. Then she does this a second time. What is the probability that Sarah will select the Florida state quarter both times? Which of the following are included as tools of biotechnology when using living cells and their components in different ways? A. working with cells, working with climate, working with molecules B. working with genes, working with breeders, working with proteins C. working with climate, working with breeders, working with molecules D. working with cells, working with proteins, and working with genesPLEASE HELP! MARKING BRAINLIEST The principal at a school recorded the color and make of all vehicles in the student parking lot. From the data, the following probability model was created about the colors of the vehicles.A 2-column table with 4 rows. Column 1 is labeled outcome with entries red, black, white, other. Column 2 is labeled probability with entries 0.28, 0.30, 0.22, 0.20.Which pairs of events about a vehicle are mutually exclusive? Check all that apply.The events red and blackThe events white and two doorThe events white and otherThe events black and truckThe events red and other Which factors affect the gravitational force between two objects?-distance and velocityO mass and distanceO mass and weightacceleration and weightTELE GOOD AT MATH!! PLEASE HELPPP If the coordinates of a pre-image are (x, y), which motion rule represents a counterclockwise rotation of 90 about the origin? Move words to the blanks and equations to the boxes to prove that vertical angles 21 and 23 are congruent.Because linear pairs of angles areandBecause angles that areto the same angle areit can be concluded that 21 23.congruentm21 +m22 = 180supplementarym22 + m23 = 180m2l + m23 = 180 Multiply.2x(6x47x2+x5)Express the answer in standard form.Enter your answer in the box. a school hall measures 10m long,7m wide and 4m high.All it's insideswalls and ceiling are painted ,calculate the total surface area 15. Roosevelt's Big Stick Policy in Latin America was best characterized byhis... How was Prince Siddhartha's life different after his fourpilgrimages? 0.6 sample an unknown organic acid found in muscle cells is burned in air and found to contain 0.24g of carbon, 0.04g of hydrogen with the rest being oxygen. If the molecular weight of the substance is 90g/mol what is the emperical and molecular formula how does having a flexiable mind help you become a better employee Find the y-intercept and the slope of the line.5x+4y=-3Write your answers in simplest form.y-intercept:Slope: No choices solve on own Find...Work of ArtWHAT is this made from? Complete these descriptions.Follow the model and remember to make any necessary agreements. a summary should have the same length as the original text Who best represents the adversarial system of justice on which the American court system is based?A. The Defense Attorney and the National CourtB. The judges and plaintiffC. The prosecution and defense attorneysD. The prosecuting attorney and police Where did the Socs find Johnny and Ponyboy after Ponyboy was hit?A baseball fieldA lakeA poolA park Which statement explains the relationship between corresponding terms in the table?