An image of Earth's layer is above.

Which layer is the most dense?

layer A

layer B

layer C

layer D

Answer:

I think it's A and C. Please tell me if I am wrong.

Explanation:

Answer:

Alright so I did this quiz a while ago it's A and C now could i have brainliest?

Explanation:

Answer:

Remotely operated vehicles, or ROVs, allow us to explore the ocean without actually being in the ocean. ... Additional equipment, such as a manipulator or cutting arm, water samplers, and instruments that measure parameters like water clarity and temperature, may also be added to vehicles to allow for sample collection.

Explanation:

Answer:

Iodine tincture also known as weak iodine solution is a combination of iodine, sodium iodide, ethanol, and water. It is a disinfectant or antiseptic.

Applications:

When we get cuts and scratches it is applied. It is used mainly to clean the skin to prevent bacterial infections.

Explanation:

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Taking into accoun the STP conditions and the ideal gas law, the correct answer is option e. 63 grams of O₂ are present in 44.1 L of O2 at STP.

First of all, the STP conditions refer to the standard temperature and pressure, where the values ​​used are: pressure at 1 atmosphere and temperature at 0°C. These values ​​are reference values ​​for gases.

On the other side, the pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P×V = n×R×T

where:

Then, in this case:

Replacing in the expression for the ideal gas law:

1 atm× 44.1 L= n× 0.082 [tex]\frac{atmL}{molK}[/tex]× 273 K

Solving:

[tex]n=\frac{1 atm x44.1 L}{0.082\frac{atmL}{molK}x273K}[/tex]

n=1.97 moles

Being the molar mass of O₂, that is, the mass of one mole of the compound, 32 g/mole, the amount of mass that 1.97 moles contains can be calculated as:

[tex]1.97 molesx\frac{32 g}{1 mole}[/tex]= 63.04 g ≈ 63 g

Finally, the correct answer is option e. 63 grams of O₂ are present in 44.1 L of O2 at STP.

Learn more about the ideal gas law:

Answer:

4

Explanation:

please mark brainiest

K(s) + 2HCl(aq) ----> 2KCl (aq) +H2(g) is an example of single replacement reactions.

A single-displacement reaction, also known as single replacement reaction or exchange reaction, is a chemical reaction in which one element is replaced by another in a compound.

Single-replacement reactions always involve two pure elements and one aqueous compound/solution. In the above reaction, the A and C would be pure elements.

A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.

Learn more about single replacement reactions:

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Answer:

first one is no reaction and the rest are reaction

Explanation:

Answer:

44   98  

Explanation:

Carbon Dioxide (CO2) - Has 1 carbon and 2 oxygens,

C=12 O=16,

Relative atomic mass(Ar) = 12 + (16 x 2),

Relative formula mass(Mr)= 44

Sulphuric Acid (H2SO4) - Has 2 hydrogens, 1 sulphur and 4 oxygens,

H=1 S=32 O=16,

Relative atomic mass(Ar) = (1 x 2) + 32 + (16 x 4)

Relative formula mass(Mr)= 98

Chemical contamination is likely to occur when cleaning products are not stored properly.

Chemical contamination refers to the introduction of harmful chemicals into food, water or the environment. These chemical substances may come in contact with food and water in many ways.

The most common sources of chemical contamination are chemical substances that are not properly stored.

Hence, chemical contamination is likely to occur when cleaning products are not stored properly.

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4.32×10−2mol hope it helps

Answer:

Yes, water can stay liquid below zero degrees Celsius. There are a few ways in which this can happen. The freezing point of water drops below zero degrees Celsius as you apply pressure. When we apply pressure to a liquid, we force the molecules to get closer together.

Explanation:

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Answer:

yes water can stay liquid below 0 ° Celsius

The time taken by the car driving at 10m/s to move 200m is 20 seconds. The speed of car is 10m/s. Thus option C is correct.

Speed is defined as a measurement of the length of time it takes for an object to travel a certain distance.

The SI unit of speed is m/s, and speed is defined as the ratio of distance to time.

A change in speed is an example of acceleration because it is a change in velocity. Acceleration could be for positive or negative. Deceleration is another name for negative acceleration.

There are four types of speed.

Speed can be expressed as

Speed = Distance / Time

Given, Distance = 200 m

           Time = 10 m/s

Speed = 200m / 10m/s

           = 20 seconds

Thus, the time taken by the car driving at 10m/s to move 200m is 20 seconds. The speed of car is 10m/s. Thus option C is correct.

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Answer:

I think it's number one option

Answer:

Label 2

Explanation:

Earth is about 2/3 of the way up the Orion Arm of the Milky Way Galaxy

5604000gallon =21239160 liters

Answer:

meiosis

Explanation:

Answer:

The Answer is B.

Explanation:

I love your name and pfp its awesome!

~Hope this helps!

HOPE IT HELPS YOU

CAN YOU BRAINLEST ME

If you are talking about an atom with a full octet, then it would just have a full shell of 8 valence electrons.

Answer:

valence

Explanation:

Answer:

if you subtract 88 from 226 you get 138

so uour answer would be C.

Answer:

138

the conversion of an atom of one element into a different element through nuclear changes

A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after the change

82

Some of the matter is converted to energy

Explanation:

I've used this website enough I think its time for me to give back.

Answer:

B

N2O

Explanation:

maybe

d can also be lol

Atomic Particles

Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

Yes, because it describes action-reaction force pairs

Answer:

c

Explanation:

Answer:

B

Explanation:

Explanation:

Not only did outermost electron determine the valence electron, but also periodic table. whatever group they fall into in periodic table each valence electrons present in a particular atom e.g K and Ca belong to group 1 and 2 respectively and k has 1 and Ca have 2 in each outermost electron