Hello please please help me with this question please help PLEASE PLEASE HELP

Answer:

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 10 m/s²

From the question we have

PE = 25 × 10 × 230 = 57,500

We have the final answer as

Hope this helps you

Answer:

Explanation:

Find 1 mole of HClO

1 mol HClO = 52.5 grams

Set up a proportion

1 mol / 52.5 = x / 1.30 * 10^8           Cross multiply

52.5 * x = 1.30 * 10^8                       Divide by 52.5

x = 1.30 * 10^8 / 52.5

x = 2.476 * 10 ^6 moles

Answer:

The magnets will push away from each other.

The calorific value of the tablespoon of cookie dough is 58.7 Calories per gram.

We have the following information from the question;

Mass of the cookie dough =  12.99 g

Heat capacity of the calorimeter = 72.49 kJ/∘C

Temperature rise = 25.23 ∘C - 21.84 ∘C = 3.39∘C

H =  12.99 g × 72.49 × 10^3J/∘C ×  3.39∘C

H = 3.19 × 10^6 J or 762.4 Cal

1 g produces 762.4 Cal/ 12.99 g = 58.7 Calories per gram

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Answer: B and C

Explanation:usatestprep

The solubility of a substance depends on both physical and chemical properties of that substance. Here the greater the surface area, the powder, the more readily the solid dissolves and also increases with the temperature. The correct options are B and C.

The maximum amount of the solute which can dissolve in a known quantity of the solvent at a certain temperature is defined as the solubility. The rate of dissolving depends on the surface area, temperature and the amount of stirring.

The increase in the surface area of the solute and temperature increases the rate of dissolving.

Thus the correct conclusions are B and C.

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Answer:

Rn

Explanation:

Rn is the symbol for radon with the atomic number of 86

The bond angle around each central carbon atom is 120°and they are both sp2 hybridized having three regions of electron density.

We can see that the two central carbon atoms have a double bond to each other. A double bonded specie is sp2 hybridized. This implies that the two central carbon atoms are sp2 hybridized.

Also, there are three regions of electron density around each of the two central carbon atoms because each is bonded to three atoms respectively. The bond angle of each central atom is 120°.

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Hint: A mole is the entity that denotes 6.022×1023 particles.

Answer:

ATGGCTGTTGTGTAA

Explanation:

Explanation:

All precipitation gravimetric analyses share two important attributes. First, the precipitate must be of low solubility, of high purity, and of known composition if its mass is to reflect accurately the analyte's mass. Second, it must be easy to separate the precipitate from the reaction mixture.

Answer:

Molarity of ETHL in a 750 ML bottle is 43777.5

Explanation:

Because 1 mole of ETHL is 58.37ML multiply it by 750ML

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Considering the definition of period, group and electronic configuration:

The elements are arranged in horizontal rows, called periods, and in columns, called groups.

The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).

There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level.

Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4. These 4 sub-levels are called: s, p, d, f.

The placement of the elements in the periodic table is done taking into account the electronic configuration.

In each period, the elements whose last level of their electronic configuration coincides with the number of the period appear.

On the other hand, in each group appear the elements that present the same number of electrons in the last occupied level or valence shell.

In summary:

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Answer:

1s2 2s2 2p3

Explanation:

Answer:

32

Explanation:

Principal quantum number=n=4

Maximum number of electrons:-

[tex]\\ \sf\longmapsto 2n^2[/tex]

[tex]\\ \sf\longmapsto 2(4)^2[/tex]

[tex]\\ \sf\longmapsto 2(16)[/tex]

[tex]\\ \sf\longmapsto 32[/tex]

Answer:The reaction of butane with sufficient/excess oxygen is as follows:

2C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H₂O

To work out how much water is produced, we first need to convert 2.64g of butane to moles by dividing it by butane's molecular mass, which is 58g/mol. From this we can see that we have roughly 0.045mol of butane. Since 0.045 is 0.022 of 2, we multiply this to get 0.22mol of water produced. The last thing to do is to multiply this by 18g (the molecular mass of water) to get 3.96g of water produced.

Explanation:

Answer:the 50 kg girl because she is 1/4th of the weight of the 200 kg man which would fall down faster causing him to have more kinetic energy and the little girl would have more more potential energy

Explanation: because in different …and ur stuck on question 10 of unit 4 guided notes

About:

Explain the second law of thermodynamic

Answer:

The second law of thermodynamics is the law of physics which states that it is impossible to construct a heat engine operating in a cycle that solely converts the heat energy obtained from a reservoir at a certain temperature into mechanical work entirely.

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Answer:

I say both I hope this helps

Answer:

The warmer, lighter air rises, bringing cooler, heavier air to low altitudes.

Air at higher altitudes doesn't have as much air weighing down on it from above.

Explanation:

In short - air pressure is the result of the cumulative force that air molecules act on objects below them due to Earth's gravity. The higher the altitude, the less air molecules there are to act a force below them, and therefore, there's less air pressure at higher altitudes.

Answer:

I believe it's the second option "Lighter air molecules float above heavier air molecules

Explanation:

I believe this because as altitude increases the amount of gas molecules decrease which makes the air less dense

Answer:

D. Data that support a hypothosis

Explanation:

Evidence needs to support a claim

Answer:

data that support a hypothesis

Answer:

It's difficult to measure the mass of an atom because they are simply so tiny. It's not like we can just put it on a weighing scale, as it wouldn't show up at all

Answer:

Because atoms are much too small to measure individually and do not have charges, there is no convenient way to accurately measure absolute atomic masses.

Answer:

dry with some fluid

Explanation:

Answer:

3.0 M

Explanation:

The molarity formula is M = n/v

where M is the molarity, n is the number of moles, and v is the volume in litres.

step 1: convert the grams of KNo3 to moles. To convert grams to moles, divide by the molar mass.

(30 g divided by 101.103 g/mol) = 0.296 moles

step 2: convert the volumes to Litres. 100 mL is 0.1 L

step 3: apply the formula. Molarity = (0.296 mol / 0.1 L) = 2.96 mol/L

We will round our answer to 3.0 M

Answer:

2NaI(aq)+Hg2(C2H3O2)2(aq)→2NaC2H3O2(aq)+Hg2I2(s)

Explanation:

D .

Explanation: Hade the test hope this helpsss

Answer:

Atoms form chemical bonds to satisfy the octet rule and to become stable.

Answer:

In He2 molecule,

Atomic orbitals available for making Molecular Orbitals are 1s from each Helium. And total number of electrons available are 4.

Molecular Orbitals thus formed are:€1s2€*1s2

It means 2 electrons are in bonding molecular orbitals and 2 are in antibonding molecular orbitals .

Bond Order =Electrons in bonding molecular orbitals - electrons in antibonding molecular orbitals /2

Bond Order =Nb-Na/2

Bond Order =2-2/2=0

Since the bond order is zero so that He2 molecule does not exist.

Explanation: