pleassee help asap its only one question ..its the bottom one and its 30 points plzzzzzzzz

Explanation:

The Answer Is

That The Coral Releases Its Colours And Becomes Pale White

Answer:

Liquid Solids are rigid due to strong glass of attraction between the particles.

Explanation:

Answer:

450 mL

Explanation:

First we calculate how many NaCl moles would there be in 1.5 L of a 0.75 M solution, using the definition of molarity:

Once again using the definition of molarity, we now calculate how many liters of a 2.5 M solution would have 1.125 moles:

Finally we convert 0.45 liters to mL:

Answer:

See explanation

Explanation:

The acid commonly used to acidify KMnO4  is H2SO4. The reason why HNO3  is not used is because HNO3  is itself a strong oxidizing agent. HCl is not used because it can react with KMnO4.

FeSO4 solution is usually prepared fresh when needed because if the solution is prepared and left to stand for sometime, FeSO4  is oxidized to Fe2(SO4)3 by air. Fe III does not give the brown ring test.

Alkali are not stored in glass stopped reagent bottles because very strong alkali can cause the stopper to corrode and fuse to the neck of the bottle making it very difficult to open the reagent bottle.

Answer:

31.58 L

Explanation:

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

Initial mole (n₁) of gas = 1.90 moles

Initial volume (V₁) = 40 L

Final mole (n₂) = 1.90 – 0.40 = 1.5 moles

Final volume (V₂) =.?

The final volume of the gas can be obtained as follow;

V₁ / n₁ = V₂ / n₂

40 / 1.9 = V₂ / 1.5

Cross multiply

1.9 × V₂ = 40 × 1.5

1.9 × V₂ = 60

Divide both side by 1.9

V₂ = 60 / 1.9

V₂ = 31.58 L

Thus, the final volume of the gas is 31.58 L

Answer:

The arteries should be your answer!

Explanation:

Answer:

ᵐʸ　friend 　　　　ʰᵉʳᵉ　 ʲᵘˢᵗⁱⁿ 　ʰᵉˢ already taken　　　ᵃⁿᵈ　hes 　　　　ᶜʳᵃᶜᵏᵉᵈ ᵃᵗ 　ᶠᵒʳᵗⁿⁱᵗᵉ　my　 guy　Uhhh

Explanation:

On a scale of 1️⃣ to , you’re a 9️⃣. I’m the 1️⃣ you need.

Answer:

[tex]H_{2} + Cl_{2} --> 2HCl[/tex]

Explanation:

Hydrogen and chlorine are both diatomic, which means they occur in molecular pairs as gases. This means you will have two atoms of each on the left in the reactants, so you will need to add a coefficient of 2 to have 2 atoms of each on the right in the products.

Answer:

The copper pan!

Explanation:

Copper conducts heat well because its atoms contain only one free valence electrons in the outer shell. Elements with a low number of valence electrons transfer heat the best, and copper has only one. Valence electrons move about freely.

Good luck on your assignment!

Answer:

n=m/M, so

Explanation:

Molar mass of Na is 22,9... so rounded to 23

n=42g/23g/mol

=1,826mol

Answer:

C

Explanation:

The battery is chemical energy. When it is used in the flashlight, it produces light and thermal energy

PLZ MARK BRAINLIEST :)

Answer:

K and Cl

Explanation:

Answer:

114

Explanation:

no

Answer:

a. Zinc is the limiting reactant.

b. [tex]m_{ZnBr_2}^{by\ Zn}=162.61gZnBr_2[/tex]

c. [tex]m_{Br_2}^{leftover}=6.6g[/tex]

Explanation:

Hello there!

a. In this case, when zinc metal reacts with bromine, the following chemical reaction takes place:

[tex]Zn+Br_2\rightarrow ZnBr_2[/tex]

Thus, since zinc and bromine react in a 1:1 mole ratio, we can compute their reacting moles to identify the limiting reactant:

[tex]n_{Zn}=47.2g*\frac{1mol}{65.38g} =0.722molZn\\\\n_{Br_2}=122g*\frac{1mol}{159.8g} =0.763molBr_2[/tex]

Thus, since zinc has the fewest moles we infer it is the limiting reactant.

b. Here, we compute the grams of zinc bromide via both reactants:

[tex]m_{ZnBr_2}^{by\ Zn}=0.722molZn*\frac{1molZnBr_3}{1molZn} *\frac{225.22gZnBr_2}{1molZnBr_2} =162.61gZnBr_2\\\\m_{ZnBr_2}^{by\ Br_2}=0.763molBr_2*\frac{1molZnBr_3}{1molBr_2} *\frac{225.22gZnBr_2}{1molZnBr_2} =171.95gZnBr_2[/tex]

That is why zinc is the limiting reactant, as it yields the fewest moles of zinc bromide product.

c. Here, since just 0.722 mol of bromine would react, we compute the corresponding mass:

[tex]m_{Br_2}^{reacted}=0.722molBr_2*\frac{159.8gBr_2}{1molBr_2} =115.4gBr_2[/tex]

Thus, the leftover of bromine is:

[tex]m_{Br_2}^{leftover}=122g-115.4g\\\\m_{Br_2}^{leftover}=6.6g[/tex]

Best regards!

Answer: There are 0.523 moles of Titanium in [tex]3.15\times 10^{23}[/tex] atoms of Titanium

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given atoms}}{\text {avogadro's number}}[/tex]

[tex]\text{Number of moles of Titanium}=\frac{3.15\times 10^{23}}{6.023\times 10^{23}}=0.523moles[/tex]

Answer:

B. partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms

Explanation:

Oxygen has a charge of 6 so they need to pull 2 electrons from hydrogen, which creates a partial negative charge.

Answer:

a chemical bond in which two pairs of electrons are shared between two atoms.

Answer:

true

Explanation: becuase if you add the same liquid to a small container and then add it to a big container its going to have the same liquid amount it started with

Explanation:

What happens during gas exchange in the alveoli?

These are called alveoli. They inflate when a person inhales and deflate when a person exhales. During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs.

What is the role of alveoli in gas exchange?

The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body.

Answer:

Hellloooo

ur answer is

Desktop Publishing.

Explanation:

thanks hope it helps

Answer:

 1* 6.022*10^23=6.022*10^23 molecules of CO2 are present.

Answer:

1. True

2. True

3.True

4. False

5. True

6. False

7.True

Explanation:

EXPLANATION:

Alliance is an approach in which two or more companies agree to pool their resources together to form a combined force in the marketplace. Unlike a merger, an alliance does not involve the emergence of a new combined entity. ... The joint venture is a very popular form of an alliance.

Answer:

Alliance is an approach in which two or more companies agree to pool their resources together to form a combined force in the marketplace. Unlike a merger, an alliance does not involve the emergence of a new combined entity. ... The joint venture is a very popular form of an alliance.

Answer:

2Al + 3Br2 = 2AlBr3 so the second option is right

Answer:

85% of 20 is 17

Explanation:

You can multiply 85% and 20 or subtract 85% from 20.

Answer:

Magnesium

Explanation:

Magnesium is above iron in the reactivity series, which means that Mg can take oxygen from iron as it is a more reactive metal.

Answer: a. exothermic

Explanation:

An Endothermic reaction is a type of chemical reaction in which energy is absorbed from the surrounding. The temperature of the surrounding decreases.

An Exothermic reaction is a type of of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.

When sodium hydroxide is dissolved in water, the temperature of water rise which means the heat has been released during dissolution of sodium hydroxide, thus the reaction is exothermic.

Answer:D the pressure increases

Explanation:

Answer: D

Explanation:

the pressure increases