PLEASE HELPPP !!!!!!!!!!!!!!!!

Answer:

Nitrogen is an inert gas — meaning it doesn't chemically react with other gases — and it isn't toxic. But breathing pure nitrogen is deadly. That's because the gas displaces oxygen in the lungs. Unconsciousness can occur within one or two breaths, according to the U.S. Chemical Safety and Hazard Investigation Board.

Answer:

because it is an insert gas and it is very dangerous for ear and our nose

Answer:

687.5 g of CO2

Explanation:

We'll begin by writing the balanced equation for photosynthesis. This is illustrated below:

6CO2 + 6H2O —> C6H12O6 + 6O2

Next, we shall determine the mass of CO2 absorbed and the mass of O2 released from the balanced equation. This is illustrated below:

Mass of CO2 = 12 + (2 × 16) = 12 + 32

= 44 g/mol

Mass of CO2 from the balanced equation = 6 × 44 = 264 g

Molar mass of O2 = 2 × 16 = 32 g/mol

Mass of O2 from the balanced equation = 6 × 32 = 192 g

Summary:

From the balanced equation above,

264 g of CO2 were absorbed to release 192 g of O2.

Finally, we shall determine the mass of CO2 absorbed to release 500 g of O2. This can be obtained as follow:

From the balanced equation above,

264 g of CO2 were absorbed to release 192 g of O2.

Therefore, Xg of CO2 will be absorbed to release 500 g of O2 i.e

Xg of CO2 = (264 × 500)/192

Xg of CO2 = 687.5 g

Thus, 687.5 g of CO2 will be absorbed to release 500 g of O2.

Answer:

At standard temperature and pressure (STP), two atoms of the element bind to form dioxygen, a colorless, odorless, tasteless diatomic gas with the formula O2. Oxygen is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element.

Answer:

Oxygen is a colorless, odorless, tasteless gas. It changes from a gas to a liquid at a temperature of -182.96°C (-297.33°F). The liquid formed has a slightly bluish color to it. Liquid oxygen can then be solidified or frozen at a temperature of -218.4°C (-361.2°F).

Explanation:

Answer:

Alcohol is a byproduct of the fermentation process, which takes place when the yeast converts the sugars derived from the grain. Knowing that, you can increase the alcohol by volume (ABV) by increasing the size of the grain bill or increasing the amount of malt extract used.

Answer:

I guessed and got c and got it right

Explanation:

When a chemical change is complete the reactants before the chemical reaction and the products after the chemical reaction will weigh the same.

Explanation:

So, from this, we can conclude that when a chemical change is complete the reactants before the chemical reaction and the products after the chemical reaction will weigh the same.

Learn more about the 'law of conservation of mass' here:  

brainly.com/question/14236219?referrer=searchResults

brainly.com/question/101125?referrer=searchResults

Answer: 150 grams

Explanation: m = V × ρ

= 15 milliliter × 10 gram/cubic centimeter

= 15 cubic centimeter × 10 gram/cubic centimeter

= 150 gram

Answer:

Starting from head to toe: A human brain is like a computer's central processing unit (CPU). In order for both the human body and computer to perform tasks, they need a brain or CPU. The brain and CPU communicate with other parts of the computer.Jan 27, 2011

Explanation:

Answer:

0.3 kicalories

Explanation:

300/1000

=0.3

PLS GIVE BRAINLIEST

Answer:

the mass of the sugar would stay the same i think.

Explanation:

Answer:

Yes, this experiment is also an example of a chemical reaction. The original substance, hydrogen, disappeared, and a new substance, water, was formed.

Explanation:

Answer:

Yes, this experiment is also an example of a chemical reaction. The original substance, hydrogen, disappeared, and a new substance, water, was formed.

Explanation:

This was the answer straight from Plato. I hope that this helped you, please mark me the brainiest, like and rate my answer if it did! :)

Answer:

P = 34.1 L

Explanation:

Given data:

Number of moles = 10 mol

Volume occupy = 15 L

Temperature = 350°C

Pressure of gas = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

350+273 = 623 K

by putting values,

P×15 L = 10 mol ×0.0821 atm.L/ mol.K ×623 K

P = 511.48atm.L/15L

P = 34.1 L

Answer:

Velocity is halved

Explanation:

Momentum is contingent on mass and velocity. The quantity of motion in a body is called the momentum of the body.

  Momentum  = mass x velocity

Now, if mass does not change and momentum is reduced by half, it suggests that the velocity was reduced by half.

Velocity is directly related to momentum.

RADIATION ❤️

We know that radiation is defined as he transfer of heat energy by electromagnetic radiation.

Answer:

9.1 = basic  1.2= very acidic  5.7= acidic

Explanation:

Answer:

C. CH₄ is less than NH₃ because the NH bond is more polar than the CH bond

Explanation:

The intermolecular forces between ammonia is far stronger than for methane. Between the molecules of ammonia we have the presence of hydrogen bonds. This bond is absent in methane.

Hydrogen bonds are one of the strongest intermolecular forces. It is as a result of the electrostatic attraction between the hydrogen atom of one molecule and the electronegative atom N, O and F of another molecule.

The strength of the hydrogen bond depends on the electronegativity of the combining atoms.

Answer:

1. The brain

2. MOUSE / KEYBOARD = HANDS

Explanation:

1.The CPU is like the brain of the body. The CPU controls the computer and is the most important part of a computer; similar to the way the brain controls the human body and is very important. Get it?

2.Both are input devices. They are used to send in instructions and information into and out of the computer.

Hope this helps!

Answer: The following can indicate that a chemical change has taken place, although this evidence is not conclusive: Change of odor.

Explanation:

Answer:

The nail will exert a force of equal strength in the opposite direction on the first object.

Explanation:

"According to Newton's third law of motion, when a hammer strikes and exerts force on a nail, the nail exerts a force of equal strength in the opposite direction on the first object."

Basically, if you push someone, they will fall over right?

Still, you will feel the force as you push them over, and you might stumble back while they are pinwheeling and falling into a pool.

That force is that torque when the person's weight is also pushing back at you while your force is pushing at them.

Explanation:

It is more difficult to remove electrons from the second shell or energy level because of the imbalance between the positive nuclear charge and the remaining electrons.

Explanation:

99 is not a prime number because it can be multiplied by itself and by other numbers

99*1

9*11

Answer:

A prime number is a number that can only be divisible by ±itself and ±1

but 99 can  be divisible by  ±3; ±11 => 99 isnt a prime number

Explanation:

Answer:

The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups.

Explanation:

In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. ... Groups may also be identified using their topmost element, or have a specific name. For example, group 16 is also described as the "oxygen group" and as the "chalcogens".

(hope this helps ^^)

Answer:

yeap this substance can conduct electricity

Answer: Hope it may help you

Explanation:

Diffusion can be defined as the movement of particles from a region where there a more concentration of solute to the region having less concentration of the solute.

Here, the salt particles will move from right side of the box to the left side of the box.

This is because the right side has more particle and the left side has less particles so they will move towards the left side.

Answer:

A

Explanation:

Answer:

0.92moles

Explanation:

Given reaction:

              2Fe + 3Cl₂ →  2FeCl₃

Mass of FeCl₃  = 100g

Unknown:

Number of moles of Cl₂  needed = ?

Solution:

To solve this problem, we work from the known specie to the unknown.

From the mass of the FeCl₃ given, we can solve for the number of moles of the unknown.

  Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  Molar mass of  FeCl₃ = 56 + 3(35.5) = 162.5g/mol

   Number of moles  = [tex]\frac{100}{162.5}[/tex]  = 0.62mole

From the reaction expression;

           2 mole of FeCl₃ is produced from 3 moles of  Cl₂  

           0.62 mole of FeCl₃ will be produced from [tex]\frac{0.62 x 3}{2}[/tex]   = 0.92mole

The number of moles of Cl₂  = 0.92moles

Volume HNO₃ : 51.4 ml

Mass CO₂ : 0.17 g

Reaction

Na₂CO₃ + 2 HNO₃ ⇒ 2 NaNO₃ + CO₂ + H₂O

V Na₂CO₃ = 35.7 ml

M  Na₂CO₃ = 0.108

mol Na₂CO₃ :

[tex]\tt 35.7\times 0.108=3.8556~mlmol[/tex]

mol ratio Na₂CO₃  : HNO₃ = 1 : 2

mol HNO₃ :

[tex]\tt \dfrac{2}{1}\times 3.8556=7.71~mlmol[/tex]

Volume HNO₃ :

[tex]\tt mol=n=M\times V\\\\V=\dfrac{n}{M}=\dfrac{7.71}{0.15}=51.4~ml[/tex]

mol CO₂ = mol Na₂CO₃ = 3.8556 mlmol=0.00386 mol

mass CO₂(MW=44 g/mol) :

[tex]\tt 0.00386\times 44=0.17~g[/tex]

Answer:

The olive oil will be on top of the vinegar, this is because the density is more

Explanation:

since vinegar has a higher density than oil it will sink to the bottom of the bottle. subsequently oil will raise up. thus oil higher layer vinegar lower layer! :) . concentration in g/L....what u are given is 5.4g and 50ml

so first change the ml into L

50ml = 0.050L

now... 5.4g/0.050L = 108g/L

resolve in significant figures is 1.1 x 10^2 g/L

b. molarity = mol/L

L = 0.050 (calculated from above)

now we only have to convert the grams (5.4g) into mols

there are three elements in sucrose ( C = carbon, H = hydrogen

and O = oxygen)

look at the periodic table and find their molar mass (atomic weight)

Carbon = 12.0g/mol

Hydrogen = 1.00g/mol

Oxygen = 16.0g/mol

Sucrose contains 12 carbons, 22 hydrogens, and 11 oxygens

So the total molar mass of sucrose =

Carbon - 12 x 12.0 = 144

Hydrogen - 22 x 1.00 = 22

Oxygen - 11 x 16.0 = 176

Total = 144 + 22 + 176 = 342g/mol

Now u have 5.4grams of sucrose to change to mols u:

5.4 grams x 1 mol/ 342grams

in other words 5.4 grams / 342 grams leaving u with mols

= 0.0158 mols

now your concentration in molarity will be:

0.0158 mols / 0.050L = 0.32M (two significant figures)

and the unit is M which stands for mol/L

c. you are given 7M (aka mol/L)

you are given 100ml which equals 0.1L

7 mol/L x 0.1L = 0.7mol

all u have left to do is change the 0.7 mol back into grams

to do that we do the opposite of what we did in part b

in part b u took grams and changed it into mols

here we are taking mols and changing it back into grams

from part b we calculated the total molar mass = 342g/mol

so:

0.7 mol x 342 g/mol = 239.4grams

resolve into significant figures = 2 x 10^2 grams

Answer:

I think its B

Explanation:

I don't know how to explain it bc I'm not really sure

I need help with it too

Answer:

Ionic bonds - an intramolecular force exist in a nonmetal and metal compounds such as NaCl. The Na donate 1 electon to Cl to complete its octet rule.

Covalent bond - an intramolecular force exist in a nonmetal and nonmetal compounds such as bonds O2, Cl2, CO2, sugar, proteins and most of organic compounds and biomolecules by sharing electrons to bond.

There are two types of covalent bonds: polar and nonpolar. Polar bond is a bond between two different nonmetal atoms of different electronegativities. While nonpolar bond is a bond between the same atom or two differenct atoms of the same electronegativities (if there is). Their electronegativities pull will cancel so that their overall polarity is zero.