A.1

B.2

C.3

D.4

Please help ASAP

Answer: If a soda can is opened and left on a scale for 24 hours then the final mass change will decrease.

Explanation:

A soda can is like any other carbonated beverage that contains carbon dioxide dissolved under pressure. So, when a soda can is opened then there will occur a release in pressure due to which excess of carbon dioxide gas moves out of the solution in the form of bubbles.

When soda can is remained open for 24 hours then additional carbon dioxide moves slowly into the air. As a result, there will occur a decrease in final mass change.

Thus, we can conclude that if a soda can is opened and left on a scale for 24 hours then the final mass change will decrease.

Answer:

189 Joules

Explanation:

Applying,

Q = cm(t₂-t₁)............. equation 1

Where Q = Heat, c = specific heat capacity of water, m = mass of water, t₁ = Initial Temperature, t₂ = Final temperature.

From the question,

Given: m = 15 grams = 0.015 kg, t₁ = 21 °C, t₂ = 24 °C

Constant: c = 4200J/kg.°C

Substitute these values into equation 1

Q = 0.015×4200×(24-21)

Q = 0.015×4200×3

Q = 189 Joules

Answer:

A? its a tie between a and c but a makes the most sense and has the least amount of exceptions. Also that person who keeps sending those bit/ly links, are they legit or are they fake websites i shouldn't use?

Explanation:

As atmospheric CO2 levels increase due to anthropogenic causes, dissolved CO2 also increases, which in turn decreases the pH of water. When water becomes saturated with CO2, it not only reduces the ocean's pH, but depletes the calcium carbonate sources as well ³⁵

Answer:

Gas

Explanation:

This is because a gas is the only substance in the given options which can be expanded or compressed as its particles are far away from each other. They can also take the shapes of the containers they are put in.

HOPE THIS HELPED

Answer:

90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you

Answer:

Elements

Explanation:

Answer:

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.Explanation:

Answer:

Please find the attached file for the complete solution:

Explanation:

3. Cl₂ + 2KI --> 2KCl + I₂

Cl = 2        Cl = 2

K = 2         K = 2

I = 2           I = 2

4. 2NaCl --> 2Na + Cl₂

Na = 2      Na = 2

Cl = 2       Cl = 2

5. 4Na + O₂ --> 2Na₂O

Na = 4      Na = 4

O = 2        O = 2

6. 2Na + 2HCl --> H₂ + 2NaCl

Na = 2         Na = 2

H = 2           H = 2

Cl = 2          Cl = 2

7. 2K + Cl₂ --> 2KCl

K = 2         K = 2

Cl = 2        Cl = 2

Answer:

6.25 g

Explanation:

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

Half-life (t½) = 68.8 years

Time (t) = 344 years

Original amount (N₀) = 200 g

Amount remaining (N) =?

Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:

Half-life (t½) = 68.8 years

Time (t) = 344 years

Number of half-lives (n) =

n = t / t½

n = 344 / 68.8

n = 5

Thus, 5 half-lives has elapsed.

Finally, we shall determine the amount of the Uranium-232 that remains. This can be obtained as follow:

Original amount (N₀) = 200 g

Number of half-lives (n) = 5

Amount remaining (N) =?

N = 1/2ⁿ × N₀

N = 1/2⁵ × 200

N = 1/32 × 200

N = 200 / 32

N = 6.25 g

Thus, the amount of Uranium-232 that remains is 6.25 g

Answer:

unsaturated

Explanation:

Answer:

23.97 grams.

Explanation:

First we convert 3.14 x 10²³ molecules into moles, using Avogadro's number:

Then we convert 0.521 moles of HCOOH into grams, using the molar mass of formic acid:

The answer is 23.97 grams.

Answer:

643 °C

Explanation:

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

Initial volume (V₁) = 268 mL

Initial temperature (T₁) = 25 °C

Final volume (V₂) = 824 mL

Final temperature (T₂) =?

Next, we shall convert 25 °C to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

T(°C) = 25 °C

T(K) = 25 + 273

T(K) = 298 K

Next, we shall determine the final temperature. This can be obtained as follow:

Initial volume (V₁) = 268 mL

Initial temperature (T₁) = 298 K

Final volume (V₂) = 824 mL

Final temperature (T₂) =?

V₁/T₁ = V₂/T₂

268 / 298 = 824 / T₂

Cross multiply

268 × T₂ = 298 × 824

268 × T₂ = 245552

Divide both side by 268

T₂ = 245552 / 268

T₂ ≈ 916 K

Finally, we shall convert 916 K to celsius temperature. This can be obtained:

T(°C) = T(K) – 273

T(K) = 916 K

T(°C) = 916 – 273

T(°C) = 643 °C

Therefore, the final temperature is 643 °C

Answer:

The answer is "Option C".

Explanation:

Please find the complete question and its solution in the attached file.

using Hoffman's elimination reaction.

Answer:

Energy retained at consumer level 1 -  units

Energy retained at consumer level 2 -  units

Energy retained at consumer level 3 -  units

Explanation:

Answer:

yes

Explanation:

yes

Answer:

navier

JAJDKEKWNEHSJJXIDJ (i need to do that so i can post the answer haha)

Answer: TEAM NAVIER FOR LIFEEEE

IF U SUPPORT TRASHTA, I HAVE NO WORDS TO DESCIRBE YOU

Answer:  A covalently bonded molecule in the reaction

[tex]K + Br_{2} \rightarrow KBr[/tex] is [tex]Br_{2}[/tex].

Explanation:

A bond formed by sharing of electrons between two or atoms is called a covalent bond.

For example, bromine is a group 17 element and it has 7 valence electrons. It needs one more electron to complete its octet.

So, when one bromine atom chemically combines with another bromine atom then sharing of electrons takes place which leads to the formation of [tex]Br_{2}[/tex] molecule.

Hence, in the equation [tex]K + Br_{2} \rightarrow KBr[/tex]; [tex]Br_{2}[/tex] reactant is a covalently bonded molecule. A covlent bond is formed by two or more non-metal atoms that chemically combine together.

In a chemical equation, reactants are written on the left side and products are written on right side.

Thus, we can conclude that a covalently bonded molecule in the reaction

[tex]K + Br_{2} \rightarrow KBr[/tex] is [tex]Br_{2}[/tex].

Answer:

Other forms of energy

Explanation:

none of the other answers could be correct.

Answer:

none of the other answers could be correct.

Explanation:

Answer:

Following are the responses to the given question:

Explanation:

Let S = solid sandy mass inside the blend

Let G = gold mass in such a blend

We search that percent G by mass

Mixture density = total blend mass / total blend volume = 3.10 g/mL

Mixture sum [tex]= S + G = 1 \ kg = 1000\ g[/tex]

Complete mixing volume = sand volume + gold volume volume

Complete mixing volume [tex]= (\frac{sand\ mass}{sand \ density}) + (\frac{gold\ mass}{gold \ density})[/tex]

Total mixture volume:

[tex]= (\frac{S}{2.84}) + (\frac{G}{19.3})\\\\ = \frac{(19.3 S + 2.84 G)}{54.812\ mL}[/tex]

[tex]\text{Mixture Density} = \frac{\text{mass mixture}}{\text{mixture volume}}[/tex]

[tex]= 3.10 \frac{g}{mL} \\\\ \to 3.10 = \frac{1000 \ g}{ \frac{(19.3 S + 2.84 G)}{ 54.812}}\\\\\to 19.3 S + 2.84 G = 17681[/tex]

When

[tex]S + G = 1000 \ g[/tex]

Solving equation:

[tex]\to 19.3 S + 2.84 G = 17 681\\\\\therefore \ S + G = 1000 \ g\\\\\to 19.3 S + 2.84 G = 17 681\\\\\to -2.84S -2.84 G = -2840\\\\----------------\\\\\to 16.46S = 14 841\\\\\to S = 901.7 g \ SanD[/tex]

When  

[tex]\to S+ G = 1000\\\\\to G = 1000 - 901.7\ g\\\to G = 98.3 g \ GOLD[/tex]

Answer:

it's answer is 2.564M

Explanation:

M= 250/58.5

=2.564M

Answer:

C) low vapor pressure

Explanation:

Vapor pressure refers to the pressure created by the vapor produced at a given temperature in a closed container. The pressure created as a result of the production of vapor above the liquid in a closed container. Vapor pressure works as the result of the force of the intermolecular force. When a liquid does evaporates easily it exemplifies that it has low vapor pressure. When the liquid evaporates easily and quickly, it exemplifies that it has high vapor pressure.

Statement that express the property of intermolecular forces that is been exhibited by liquid is C: low vapor pressure.

Therefore, option C is correct.

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Answer:

pH = 3.5

Explanation:

HCl is a strong acid, so we can use this little formula to find the pH of the solution:

pH = -log[H3O+]

(where H3O+ is the strong acid, HCl)

So we just plug in the molarity for the concentration of the acid...

pH = -log(0.00034)

Solve.

pH = 3.468521083

And apply sig. figs....

pH = 3.5

Answer:

The one on the left has more products than reactants and is endothermic

The one on the right has more reactants than products and is exothermic

Explanation:

Endothermic: Energy is absorbed

Exothermic: Energy is released

Answer:

92.96 g

Explanation:

In order to calculate the mass of any number of moles of a given substance, we need to know the substance's molar mass:

We can look for the molar mass of N in any periodic table.

Now we proceed to calculate the mass of 3.32 moles of N₂: