Atoms of two different elements must have different
electrical charges.
numbers of neutrons.
atomic numbers.
energy levels.
GIVE EXPLANATION!!!!

Answer:

The Answer is eight.

Explanation:

Sorry if it's too late and it doesn't help! But I hope you have a magnificent day! :3

Answer:

8

Explanation:

I had this question on my quiz and got it right.

Answer:

D. electron

Explanation:

Electrons have a negative charge

Answer:

Specififc rotation [∝] = 0.5° mL/g.dm

Explanation:

Given that:

mass = 400 mg

volume = 10 mL

For a solution,

The Concentration = mass/volume

Concentration = 400/10

Concentration = 40 g/mL

The path length l = 20 cm = 2 dm

Observed rotation [∝] = + 40°

Specififc rotation [∝] = ∝/l × c

where;

l = path length

c = concentration

Specififc rotation [∝] = (40 / 2 × 40)

Specififc rotation [∝] = 0.5° mL/g.dm

Using the specific rotation formular, the specific rotation obtained for the compound ls 5°

Given the Parameters :

Concentration, C

Concentration = mass × volume

Mass = 400 mg = 400 /1000 = 0.4g

Volume = 10 mL

Concentration = 0.4g × 10 mL = 4g/mL

The specific rotation formular, [tex] [\alpha] [/tex] is given by :

[tex] [\alpha] = \frac{\alpha_{observed}}{C \times l} [/tex]

[tex] [\alpha] = \frac{40°}{4 \times 2} = \frac{40°}{8} = 5° [/tex]

Therefore, the specific rotation of the compound ls 5°

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Explanation:

When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.

Answer:

A) enthalpy of reaction

Explanation:

The region C signifies the enthalpy of reaction.

This diagram is the energy profile of an endothermic reaction. In such reaction, heat is absorbed from the surrounding. At the end of the reaction, the heat of product is lesser than that of the reactants.

it is indeed A) enthalpy of reaction

Answer:

Compaction.

Explanation:

All the others are before this.

Answer:

8,903.09 square meters

Explanation:

Doing a quick search online we can see that there are exactly 4046.86 square meters in a single acre (1 acre). Therefore, we can simply use the rule of three to calculate the total amount of square meters in 2.2 acres. We do this by multiplying 2.2 acres by 4046.86 square meters and then dividing by 1 acre to solve for x.

1 acre  <=====>  4046.86 square meters

2.2 acres <====> x

(2.2 * 4046.86) / 1 = x

8903.09 / 1 = x

8,903.09 = x

Finally, we can see that there are 8,903.09 square meters in 2.2 acres.

Answer:

Fatty acids are fairly long linear hydrocarbon chains with a carboxylic acid group at one end. Fatty acids are named based on the number of carbon atoms and carbon-carbon double bonds in the chain. ... This bond could bind a molecule of hydrogen, forming a 16-carbon molecule with no carbon-carbon double bonds.

Explanation:

Fatty acids are the fundamental blocks of fat in our bodies and our meals.

Fatty acids are carboxylic acids with long aliphatic chains that can be branched or unbranched in biochemistry. Natural fatty acids have an even number of carbon atoms and are usually unbranched. Fatty acids are important components of lipids.

They exist as esters in three different forms:

Fatty acids that are vital to our bodies but cannot be produced in sufficient quantities within our cells are obtained from dietary sources. They are referred to as essential fatty acids. Linoleic acid and alpha-linoleic acid are two examples.

Fatty acids serve as energy sources as well as membrane constituents. They are involved in signaling, cell metabolism, and energy storage in adipose tissues.

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1) Both cells have a cell membrane.

2) A nucleus is present in only Eukaryote cells.

3) I'm pretty sure Prokaryote cells are bacteria.

Hope this helps!! :)

Answer:

0.0611M of HNO3

Explanation:

The concentration of the NaOH solution must be 0.1198M

The reaction of NaOH with HNO3 is:

NaOH + HNO3 → NaNO3 + H2O

1 mole of NaOH reacts per mole of HNO3.

That means the moles of NaOH used in the titration are equal to moles of HNO3.

Moles HNO3:

12.75mL = 0.01275L * (0.1198mol / L) = 0.0015274 moles NaOH = Moles HNO3.

In 25.00mL = 0.025L -The volume of the aliquot-:

0.00153 moles HNO3 / 0.025L =

Answer:

Option D. 0.115 M

Explanation:

The following data were obtained from the question:

Mass of CuSO4 = 36.8 g

Volume of solution = 2 L

Molar mass of CuSO4 = 159.62 g/mol

Molarity of CuSO4 =..?

Next, we shall determine the number of mole in 36.8 g of CuSO4.

This can be obtained as shown below:

Mass of CuSO4 = 36.8 g

Molar mass of CuSO4 = 159.62 g/mol

Mole of CuSO4 =.?

Mole = mass /Molar mass

Mole of CuSO4 = 36.8 / 159.62

Mole of CuSO4 = 0.23 mole

Finally, we shall determine the molarity of the CuSO4 solution as illustrated below:

Mole of CuSO4 = 0.23 mole

Volume of solution = 2 L

Molarity of CuSO4 =..?

Molarity = mole /Volume

Molarity of CuSO4 = 0.23 / 2

Molarity of CuSO4 = 0.115 M

Therefore, the molarity of the CuSO4 solution is 0.115 M.

Answer:

Explanation:

Area of person's back = .18 m²

energy of radiation falling on the back per second

= 70 x .18 J

= 12.6J

Energy absorbed per second = .5 x 12.6 = 6.3 J

energy absorbed per hour = 6.3 x 60 x 60 = 22680 J

energy required to break one mole bond = 348 x 10³ J  

energy required to break one bond = 348 x 10³ / 6.02 x 10²³

= 57.8 x 10⁻²⁰ J .

So number of bonds broken in one hour = 22680 / 57.8 x 10⁻²⁰

= .392  x 10²³ bonds .

= 39.2 x 10²⁰ bonds .

Answer:

7

Explanation:

Answer:

7 is your answer

YW! :)

Explanation:

Answer:

C a chemical has become a different color

Explanation:

is it a chemical change when water turns to ice? or to water vapor? no because it can easily change back.

it's not A obviously

I just explained why it's not B

and again it's obviously not D

It's C because once you change the color of something you can most likely not change it back (cake batter, stained glass) making it a chemical change

Answer:

C.

Explanation:

You can use the series of elimination for this. First, you look at A. Technology is not an understanding of something new, so we cross that out. Second, you look at B. Technology isn't a series of steps, so we can mark that one off. Third, you look at C. Technology is something created using science for use by society, so we can keep that in mind. Lastly, we check D. Technology doesn't match up to the definition, so we can cross that one out. The answer that would make the most sense would be D.

Answer:

dinosaurs laid eggs,sabretooths were carnivores, bats lived millions of years ago ,fossils of cynobacteria exist?

Explanation:

Answer:

The velocity of the river increased.

There was more erosion in the stream.

The type of sediment that moved changed.

Explanation:

Answer:

The river increased its slope.

The volume of the river decreased.

The velocity of the river increased.

There was more erosion in the stream.

The type of sediment that moved change

Explanation:

Answer:

infinite

Explanation:

Answer:

i wish i could help but t know either so i wish you luck for an answer once again truly sorry don'

Explanation:

i am sorry but i do not know :(

Answer: It’s D

Explanation:

Cuz I said so

Answer: d. Shearing

Explanation:

Answer:

The effect is the increasing of the molar concentration.

Explanation:

When you standarize a solution of NaOH with KHP you are establish its molar concentration (That is the amount of moles of NaOH per liter of solution).

If you evaporated some water of the solution, you are increasing its concentration because volume is decreasing doing the amount of moles per liter increasing.

Answer: i think its protons and electrons but it also might just be atoms because protons and electrons  make atoms when there are also neutrons

Explanation:

A buffer system has been the salt solution that has been able to avoid the change in the pH with the addition of acid or base to the solution.  

The acid has been comprised of the hydrogen ion, and react with the base with the formation of salt, thereby limit the change in pH.

The addition of acid to the buffer solution has been given as:

[tex]\rm HCl+NH_3\;\leftrightharpoons\;NH_4Cl[/tex]

The base addition to the buffer reacts with the acid part of the buffer and forms salts to resist the change in pH.

The addition of the base, KOH to the buffer solution has been given as:

[tex]\rm KOH+NH_4^+\;\leftrightharpoons\;K^+\;+\;NH_3\;+\;H_2O[/tex]

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Answer:

4

Explanation:

24/6 is 4.

Answer:

Mathematically: D = m/v. If you know what liquid you have, you can look up its density in a table. Once you know that, all you have to do to find the mass of the liquid is to measure its volume. Once you know density and volume, calculate mass using this relationship: mass = density • volume.

Explanation:

Answer:

sure

Explanation:

The substance formed after heating the mixture of that of Rahul is caleed a compound. Whereas, Manav's mixture still remains in its current stae that is a heterogeneous mixture.

The compound formed is in black in color whereas the mixture is a mix of brownish-red and yellow.

The compound is a homogeneous mixture whereas the mixture is a heterogenous mixture because of its uneven distribution.

Answer:

platinum = 21.4 I think it's letter D to be related to it.

Answer:

56.89 g of HF

Explanation:

We'll begin by writing the balance equation for the reaction. This is illustrated below:

SiF₄ + 2H₂O —> 4HF + SiO₂

Next, we shall determine the mass of H₂O that reacted and the mass of HF produced from the balanced equation.

This is illustrated:

Molar mass of H₂O = (2×1) + 16 = 2 + 16 = 18 g/mol

Mass of H₂O from the balanced equation = 2 × 18 = 36 g

Molar mass of HF = 1 + 19 = 20 g/mol

Mass of HF from the balanced equation = 4 × 20 = 80 g

Summary:

From the balanced equation above,

36 g of H₂O reacted to produce 80 g of HF.

Finally, we shall determine the mass of HF produced from the reaction. This is illustrated below:

From the balanced equation above,

36 g of H₂O reacted to produce 80 g of HF.

Therefore, 25.6 g of H₂O will react to produce = (25.6 × 80)/36 = 56.89 g of HF.

Thus, 56.89 g of HF were produced from the reaction.

Answer:

B. are electrical signals.

Answer:

Explanation:

We shall use the formula S₁V₁ = S₂V₂

S₁ = .1180 M , V₁ = 25.98 mL

S₂ = ? , V₂ = 52.50 mL

.1180 M  x 25.98 = 52.50 x S₂

S₂ = .0584 M

Molarity of the acid solution = .0584 M .

The concentration of the acid solution is 0.058 M.

The equation of the reaction is;

CH3COOH(aq) + KOH(aq) ----->  CH3COOK(aq) + H2O(l)

The following are known;

Concentration of base CB = 0.1180 M

Volume of base VB =  25.98 mL

Concentration of acid CA = ?

Volume of acid VA = 52.50 mL

Number of moles of acid NA = 1

Number of moles of base NB = 1

Using;

CAVA/CBVB =NA/NB

CAVANB = CBVBNA

CA=  CBVBNA/VANB

CA = 0.1180 M × 25.98 mL × 1/52.50 mL × 1

CA = 0.058 M

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