Nguyên tử khối của đồng

Explanation:

Ionization is the process by which ions are formed by gain or loss of an electron from an atom or molecule. If an atom or molecule gains an electron, it becomes negatively charged (an anion), and if it loses an electron, it becomes positively charged (a cation). Energy may be lost or gained in the formation of an ion.

The Elephant Maximus is the species that was introduced and later became extinct on Maguindanao.

Extinction occurs as all members of a species die, and therefore the species disappears. This includes complete extinction or extinction of the species in a specific zone.

In the case of the Elephant Maximus, which is known as the Asian Elephant, this species became extinct in a region known as Maguindanao in the Philippines.

This partial extinction occurred as the elephants from this zone were taken to Sabah in Malaysia from the 13th century to the 16th century. This occurred because the Sultans of this region considered this elephant to be a valuable and even sacred animal.

Learn more in: https://brainly.com/question/14698336

Answer:

ahhh i d kkkkk im so so so so sorry

Explanation:

Fat is a energy giving , protective food

hope it helps

I give my best answer almost

The mass percent of Green Dye X in the drink powder if the molecular weight is 418.4 g/mol is 0.355%

Beer's law explains the relation between the concentration of a solution to its absorbance (A) by using the equation.

here:

Now from the calibration curve in the question, the plot between the absorbance and the concentration gives a straight line of y = mx.

Here

The equation of the calibration curve is given as:

i.e.

If the sports drink was 10 times diluted while taking the absorption measurement. Then, the actual concentration of green dye in the sports drink is:

= 0.017 mM × 10

= 0.17 mM

The number of moles of green dye in 250 mL (i.e. 0.25 L) sports drink is estimated as:

= 0.17 mmol/L × 0.25 L

= 0.0425 mmol

However, the mass of the green dye present in the sports drink is

= 0.0425 mmol ×418.4 g/mol

= 17.782 mg

Finally, the mass percent of green dye in the drink powder is:

[tex]\mathbf{ = \dfrac{mass (dye)}{mass (powder)} \times 100\%}[/tex]

[tex]\mathbf{ = \dfrac{17.782 \ mg }{5.0 \ g} \times 100\%}[/tex]

[tex]\mathbf{ = \dfrac{17.782 \ mg }{5000 \ mg} \times 100\%}[/tex]

= 0.355 %

Learn more about mass percent here:

https://brainly.com/question/11890206?referrer=searchResults

The characteristic of reactions that depends on valence electrons is the bond type.

In chemistry, a chemical bond could be;

The type of bond formed depends on the number of valence electrons present. When there are few valence electrons on an atom, it mostly forms ionic bonds.

When there are more electrons on an atoms, it mostly forms covalent bonds and the electrons between the atoms are shared.

Learn more:https://brainly.com/question/22638110?referrer=searchResults

Answer:

D: bond number

Answer:

Researching maybe? That's a scientific method lol

If the concentration of acetyl chloride  is increased ten times the rate of reaction is increased ten times.

The conversion of acetyl chloride to methyl acetate is a substitution reaction. Recall that a substitution reaction is one in which a moiety in a molecule is replaced by another.

In this reaction, the CH3O- ion replaces the chloride ion. In the first step, the CH3O- ion attacks the substrate in a slow step. This creates a tetrahedral intermediate. Loss of the chloride ion yields the  methyl acetate product.

The rate determining step is the formation of the tetrahedral intermediate. Since the reaction is first order in the acetyl chloride, if its concentration is increased ten times the rate of reaction is increased ten times.

Learn more: https://brainly.com/question/5624100

Answer:400

Explanation:

20x20

P(momentum)= mxv

Mass times velocity = momentum

Answer:

evaporation

Explanation:

An example of this is when puddles evaporate into the air after it has rained. Condensation is the opposite: gas → liquid

Hope this helps!

Aria speed during scuba diving was 0.15 m/s.

Speed is the ratio of the distance travelled to the time taken. Speed is given by:

Speed = distance / time

Given that the distance travelled was 36 meters and the time was 4 minutes, hence:

Time = 4 minutes × 60 seconds per minute = 240 seconds

Speed = 36 m / 240 s

Speed = 0.15 m/s

Therefore Aria speed during scuba diving was 0.15 m/s.

Find out more at: https://brainly.com/question/22610586

Answer:

Chemistry is sometimes called “the central science,” because it bridges physics with other natural sciences, such as geology and biology. Chemistry is the study of matter and its properties.

Explanation:

~found it~

Answer:

Yes, Because the dishes that are unwashed have the most bacteria while the soap & water dish has the least bacteria.

Explanation:

Hope this help

Explanation:

option B is the correct answer, 1.67g/mL.

hope this helps you.

Answer:

CO2

Explanation:

Non polar molecules are insoluble in water .

Option A

[tex]\sf \longmapsto co_{2}[/tex]

[tex]\sf \longmapsto\sf Co_{2}[/tex]

Lewis Structure =

[tex]\sf \longmapsto\sf \: o \: = c = o[/tex]

[tex]\sf \longmapsto4 + 6(2)[/tex]

[tex]\sf \longmapsto16[/tex]

Answer:

here is your answer

enjoy

Answer:

gdhjvdhihfhddjcuh

dhsgbeyfgjgjjkk

tjfhh

gjgu

Answer:

Explanation:

First, calculate the molar mass of Aluminum Oxide (Al2O3), by multiplying the number of the constituent atoms, by their relative atomic abundances . Inserting the atomic masses into the equation gives you  . Then find the percent of Aluminum by mass, in Aluminum Oxide.  Finally, set up an equality, where 53.02% of the mass of Aluminum Oxide, is 999 grams of Aluminum

Answer:

What is surface tension?

Explanation:

Surface tension and droplets: Surface tension is responsible for the shape of liquid droplets. Although easily deformed, droplets of water tend to be pulled into a spherical shape by the cohesive forces of the surface layer.

Surface tension forces between mucosal surfaces play an important role in the pathogenesis of the disease. The obstruction of upper airway elicit the activation of autonomic nervous system, hypoxemia, and arousal from sleep.

Hope it helps

Answer:

positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).

Answer:

glycoproteins

Explanation:

A positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).

Answer:

what queastiion

Explanation:

Answer:

what is the question

Explanation:

...

Answer:

A

Explanation:

Taking into account the definition of dilution, the concentration of the final solution is 5 mg/L.

First of all, you have to know that dilution is the reduction in concentration of a chemical in a solution.  The process consists of adding more solvent to the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

25 mg/L × 10 mL= Cf × 50 mL

Solving:

Cf= (25 mg/L × 10 mL)÷ 50 mL

Cf=  5 mg/L

In summary, the concentration of the final solution is 5 mg/L.

Learn more about dilution:  

Answer:

Option C )The number of atoms of each element is the same on each side of the equation.

Answer:

Option D

Hope it helps you

Answer:

The controlled variable of an experiment is the one thing that stays the same in an experiment.

Explanation:

An example would be : if I have two pennies, both dunked in water, but than I change one to be dunked in vinegar, the one dunked in water still is the constant or the controlled variable.

Answer:

They all have the same number of atoms

Explanation:

Which of the following has more atoms?

One mole of zinc

One mole of gold

One mole of silver

One mole of magnesium contians  

O They all have the same number of atomst

a mole of anything contains Avogadros number of 6.022X10^23  things

which has the greatest number of thing? a dozen eggs, a dozen cookies, a dozen pizzas?

a dozen is a number means 12

a mole is a number that that means 6.022 X 10^23 you calculate the molar mass from the chemical formula, but every j mole contains 6.022X10^23

particles.

just like every dozen contains 12

so

They all have the same number of atoms