Help please...balance the equations. Extra points!

Answer:

E = 147000  J

Explanation:

Given that,

The mass of meteor, m = 50 kg

The altitude of the meteor, h = 300 m

We need to find the potential energy of the meteor. The formula for the potential energy is given by :

[tex]E=mgh[/tex]

Put all the values,

[tex]E=50\times 9.8\times 300\\\\E=147000\ J[/tex]

So, the required potential energy is equal to 147000  J.

Answer:

hi the ans is A.

..............

Answer:

The answer is D in acellus

Explanation:

Answer:

0.244 M.

Explanation:

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

Molarity of stock solution (M₁) = 1 M

Volume of stock solution (V₁) = 0.305 L

Volume of diluted solution (V₂) = 1.25 L

Molarity of diluted solution (M₂) =?

The molarity of the diluted solution can be obtained by using the dilution formula as illustrated below:

M₁V₁ = M₂V₂

1 × 0.305 = M₂ × 1.25

0.305 = M₂ × 1.25

Divide both side by 1.25

M₂ = 0.305 / 1.25

M₂ = 0.244 M

Thus, the molarity of the diluted solution is 0.244 M

Answer:

- Identify the acid and base in the reaction.

- What is left of the base after the reaction is known as the conjugate acid, while what is left of the acid after the reaction is known as the conjugate base.

Explanation:

Types of acids and bases:

When we are looking at conjugate acid and base, the type of acid and base we should focus on are Brønstead acid and base.

Brønsted acid: proton donor

Brønsted base: proton acceptor

Do note that proton here refers to hydrogen ion, H⁺.

Other types of acids and bases includes arrhenius acid/base and Lewis acid/base.

Definition:

Conjugate acid is what remains of the acid when a Brønsted acid donates a proton, while conjugate base is the newly formed protonated species when a Brønsted base accepts a proton.

Example:

Let's look at an example of a Brønsted acid-base reaction:

NH₃(aq) +H₂O(l) ⇌ NH₄⁺(aq) +OH⁻(aq)

Here, the base is NH₃ and the acid is H₂O.

NH₄⁺ is the conjugate acid, while OH⁻ is the conjugate base.

Note:

For a Brønsted acid- base reaction, whether a substance behaves as an acid or a base depends on what it is reacting with. Although H₂O behaves as an acid in this example, it behaves as a base when reacting with HCl.

Answer:

A substance that produces hydrogen gas when dissolved

Answer:

H₂S + Cl₂ —> S + 2HCl

Explanation:

? + Cl₂ —> S + 2HCl

To balance the equation above, we must recognise what atoms are present in the products.

The products contains S, H and Cl.

Thus, S, H and Cl must also be present in the reactants.

Considering the equation given above, we can see clearly that H and S is missing in the reactants.

H and S together as a compound is expressed as H₂S.

Now, we shall input H₂S into the equation to obtain the complete equation. This is illustrated below:

? + Cl₂ —> S + 2HCl

H₂S + Cl₂ —> S + 2HCl

Next, we shall verify to see if the equation is balanced.

There are 2 atoms of H on both sides of the equation.

There are 2 atoms of Cl on both sides of the equation.

1 atom of S exist on both sides of the equation.

Thus, the equation is balanced.

Answer:  You meant in constant temperature?

Because temperature is not mentioned at the beginning.

I suppose temperature remains constant, otherwise

there is no enough data for solving the problem

Explanation: According Boyle´s law in constant temperature

pV = constant.  So p1V1 = p2V2   and pressure p2 = p1V1 /V2

= 88 atm · 18 l / 12 l =  132 atm.

If I have 18 liters of gas at a pressure of 88 atm, the final pressure of the gas if the volume of the gas is decreased to 12 liters under constant pressure is 132atm.

The pressure of gas at constant temperature can be calculated using Boyle's law equation as follows:

P1V1 = P2V2

Where;

The final pressure of the gas can be calculated as follows:

88 × 18 = 12 × P2

1584 = 12P2

P2 = 1584 ÷ 12

P2 = 132atm

Therefore, have 18 liters of gas at a pressure of 88 atm, the final pressure of the gas if the volume of the gas is decreased to 12 liters under constant pressure is 132atm.

Learn more about Boyle's law at: https://brainly.com/question/1437490

Answer:

the outside of the car is hot

n-pentane

Explanation:

The longer the alkyl chain, the greater the opportunity for Van der Waals interactions between chains. Thus as the chain length increases, the boiling point increases

Answer:

4.29 g

Explanation:

The equation of the reaction is; Co(NO3)2(aq) + K2S(aq) → CoS(s) + 2KNO3(aq)

Number of moles of potassium sulphide = 175/1000 L * 0.225 M = 0.039 moles

Number of moles of cobalt (II) nitrate =250/1000 L * 0.180 M = 0.045 moles

Hence;  potassium sulphide is the limiting reactant

Since the mole ratio is 1:1

Mass of solid product = 0.039 moles * 110 g/mol = 4.29 g

Answer:

2, 8, 10, 2

Explanation:

Answer:

2, 8, 10, 2

Explanation: Titanium/Electrons per shell

Answer:

[tex]molar \: mass = 24g[/tex]

Answer:

The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.

Answer:  The coefficient we should change first is for [tex]NO_{3}[/tex].

Explanation:

The given reaction equation is as follows.

[tex]Al + Ni(NO_{3})_{2} \rightarrow Al(NO_{3})_{3} + Ni[/tex]

Here, number of atoms present on reactant side are as follows.

Number of atoms present on the product side are as follows.

To balance this equation, multiply Al by 2 and [tex]NO_{3}[/tex] by 3 on reactant side. Also, multiply [tex]Al(NO_{3})_{3}[/tex] by 2 and Ni by 3 on the product side.

Hence, the equation can be rewritten as follows.

[tex]2Al + 3Ni(NO_{3})_{2} \rightarrow 2Al(NO_{3})_{3} + 3Ni[/tex]

Now, number of atoms present on reactant side are as follows.

Number of atoms present on product side are as follows.

Since, the atoms on both reactant and product side are same. Hence, it is now a balanced chemical equation.

Thus, we can conclude that the coefficient we should change first is for [tex]NO_{3}[/tex].

Answer: pH = 2.68

Explanation: pH = - log[H3O^+] .

 HCl reacts with water : HCl + H2O ->  Cl^- + H3O^+

So [H3O^+] = c(HCl) = 0.0021 M

pH = - log(0.0021) = 2.68

Answer:

50/400 × 100/1

0.125 × 100

= 12.5%

Answer:

1. C) Hydrogen of water is separated from oxygen.

2. A) Carbon dioxide

3. D) Mechanical energy to chemical energy

4. B) Glucose

5. B) Respiring while swimming underwater

6. A) Oxygen

7. B) Photosynthesis depends on the carbon dioxide released during cellular respiration.

8. A) It is affected by social concerns.

9. D) Chlorophyll stores chemical energy needed for photosynthesis.

10. Cellular respiration is the process by which organisms use oxygen to break down food molecules to get chemical energy for cell functions.

Brainlist Pls!

Answer:

7.94x10⁻⁸ M

Explanation:

Using the pH given by the problem, we can calculate the pOH of the blood plasma:

Then we can proceed to calculate the [OH⁻] of the blood plasma, using the definition of pOH:

Answer:

Antarctic Peninsula, is one of the most important fossil sites on Earth.

hope this helps you ☺️☺️

Fossils that would be expected to be found in Antarctica from more recent times, after it had moved much closer to the South Pole is Antartica peninsula.

Fossils are the preserved remains, impression, or trace of any once-living thing from many years ago. Examples of the fossils include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants.

There are four different types of fossils-

Mold fossils

Cast fossils

Trace fossils or Ichnofossils

True form fossils

Imprints, tracks, and trails can also become fossilized and are called Trace fossils. Dinosaur footprints or worm burrows are the examples.

Living things when get decomposed from the so many years ago and become dirt and rocks are fossils.

Therefore, Fossils that would be expected to be found in Antarctica from more recent times, after it had moved much closer to the South Pole is Antartica peninsula.

Learn more about Fossils, here:

https://brainly.com/question/14988327

#SPJ3

Answer:

Molecular weight

Explanation:

The difference in the physical state of nonane vs methane at STP.  Methane is a very small molecule with a molecular weight of 16 g/mol.  It exists as a gas at standard temperature and pressure.  Nonane is a much larger molecule with a molecular weight of 128.2 g/mol.  It exists as a liquid at standard temperature and pressure.  

All gasses at STP are Made of small molecular weight molecules.  The smaller a molecule, the more movement the individual atoms have.  The increased movement of smaller molecules allows them to have more space between individual molecules.  The increased molecular motion and space between molecules is one of the main differences between a gas versus a liquid or solid.  The larger nonane molecules have less molecular motion and so are can be closer together and so exist as a liquid instead of a gas.

Answer: The balanced equation is [tex]2KOH + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + 2H_{2}O[/tex] and the concentration of the sulfuric acid solution is 0.184 M.

Explanation:

Given: [tex]V_{1}[/tex] = 27.5 mL,       [tex]M_{1}[/tex] = 0.235 M

[tex]V_{2}[/tex] = 35.0 mL,            [tex]M_{2}[/tex] = ?

Formula used to calculate the concentration of the sulfuric acid solution is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]

Substitute the values into above formula as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\0.235 M \times 27.5 mL = M_{2} \times 35.0 mL\\M_{2} = \frac{0.235 M \times 27.5 mL}{35.0 mL}\\= 0.184 M[/tex]

The given chemical equation for given reaction is as follows.

[tex]KOH + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + H_{2}O[/tex]

Number of atoms on reactant side are as follows.

Number of atoms on product side are as follows.

To balance this equation, multiply KOH by 2 on reactant side and multiply [tex]H_{2}O[/tex] by 2. Hence, the equation can be rewritten as follows.

[tex]2KOH + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + 2H_{2}O[/tex]

Now, number of atoms on reactant side are as follows.

Number of atoms on product side are as follows.

Since, there are same number of atoms of both reactant and products. Therefore, the equation is now balanced.

Thus, we can conclude that the balanced equation is [tex]2KOH + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + 2H_{2}O[/tex] and the concentration of the sulfuric acid solution is 0.184 M.

Answer:

13 mol NO

Explanation:

Step 1: Write the balanced equation

4 NH₃(g) + 5 O₂(g) ⇒ 4 NO(g) + 6 H₂O(g)

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of O₂ to NO is 5:4.

Step 3: Calculate the number of moles of O₂ needed to produce 16 moles of NO

We will use the previously established molar ratio.

16 mol O₂ × 4 mol NO/5 mol O₂ = 13 mol NO

Answer:

Bromine loses an electron.

Explanation:

Hello there!

In this case, according to the given chemical reaction, it will be possible for us to realize that as the reaction progresses, we see that the bromine, as it is initially negative, it increases the oxidation state as it loses an electron for which it is oxidized.

Moreover, no change is potassium is evidenced as it remains as the cation in the reaction; therefore, the answer is Bromine loses an electron.

Regards!

Answer:

The above answer is correct

Explanation:

I took the test