Balance the three equations below by adding the coefficient next to the element(s).

Cr2O3 + 3Mg —> __Cr + 3MgO

__H2 + 1O2 —> 2H2O

2 NaBr + Cl2 —> __NaCl + Br2

Answer: 6.40 moles

Explanation:

Answer:

Mercaptan is the additive that is added to natural gas to make it easier to detect in case of a leak. The most important thing to know about mercaptan is that it stinks. Some people compare it to the smell of rotten eggs.

Explanation:

3.07 moles of hexane must burn to form 18.4 moles of carbon dioxide.

Moles of any substance is define as the ratio of the given mass to the molar mass of that substance.

Given chemical reaction is:

2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O

From the stoichiometry of the reaction, it is clear that:

2 moles of C₆H₁₄ = produce 12 moles of CO₂

1 moles of CO₂ produced by = 2/12 moles of C₆H₁₄

18.4 moles of CO₂ produced by = 1/6×18.4=3.07 moles of C₆H₁₄

Hence, option (2) is correct i.e. 3.07 moles.

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Answer:

yes, because water is reacting with air and heat and creating a boiling effect.

Explanation: kracken doge

Answer: Freezing and boiling are considered to be examples of chemical reactions. This depends on their conception of substance. If students regard ice as a different substance from liquid water they are likely to classify the melting of ice as a chemical change.

Explanation:

Boiling water, boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). No, boiling water is NOT a chemical reaction, but it is a physical change.

Answer:

the first picture is of prophase and the second one is interphase

Explanation:

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A weather map of Chicago with a high pressure system and warm front, so the upcoming weather be Warm, dry, clear skies in Chicago.

High pressure of air tries to compress the gas from upper atmosphere to lower atmosphere.

When any gas has high pressure then it sinks towards the land from the upper atmosphere, and at the upper part air gets cool and form water vapor. When air comes towards the land then, it becomes warm and dry as it doesn't participate in the formation of precipitate. Due to which we are able to see clear sky at the dry days.

Hence, option (1) is correct i.e. Warm, dry, clear skies are the upcoming weather.

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Answer:

A. Warm, dry, clear skies

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During the reaction of glucose and fructose with excess phenylhydrazine to form osazone, only the C-1andC-2 atoms of glucose and fructose participate in the reaction. The rest of the molecule remains intact. Hence, glucose and fructose produce the same osazone.

The specific proteins produced by cell B in response to the foreign substance are antibodies.

Antibodies are specific proteins produced by the immune cells of the body in response to a foreign substance called antigen which produces the immune response.

Antibodies are released by immune cells such as B cells.

The antibodies bind to antigen and tag them for destruction by phagocytes.

Therefore, cell B will produce antibodies.

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Answer:0.633 0.440

Explanation:

edge

There are  0.6326 mole in Cu atom and 0.4397 mole in S atom.

A mole would be defined as the quantity of a material that includes precisely 6.02214076 X [tex]10^{23}[/tex] of the substance's elementary entities.

Calculation of mole of Cu

Given data:

Mass of Cu = 40.2 g

Molar mass of Cu = 63.546 u

Mole?

Mole can be determined by the formula:

Mole = mass / molar mass

Mole = 40.2 g / 63.546 u

Mole = 0.6326

Calculation of mole of S.

Given data:

Mass of S = 14.1 g

Molar mass of S = 32.065u

Mole = ?

Mole can be determined by the formula:

Mole = mass / molar mass

Mole = 14.1 g / 32.065u

Mole = 0.4397

Therefore, there are  0.6326 mole in Cu atom and 0.4397 mole in S atom.

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Answer:

. The authorities have closed the casino.(change in passive)

Answer:

Violet is most likely to refract, while red is least likely to refract

Explanation:

The wavelengths :)

Dispersion states that the shorter the wavelength of the light/color, the more it is refracted. Because of this, the red light is less likely to refract while violet light is most likely to refract

Answer:

V2 = 3.39

Explanation:

V1/T1 = V2/T2

V1 = 6.80L

T1 = 325C (must be convert to K by + 273.15) = 598.15 K

T2 = 25C = 298.15 K

V2 =?

T2xV1/T1 = V2

298.15 x 6.80/ 598.15 = V2

3.39 = V2

So 3.39 is the answer!

Answer:

No, it's a molecule that contains one nitrogen atom and one oxygen atom. This is in contrast to N 2 O, which consists of two nitrogen atoms and one oxygen atom.

Answer:

alkali metals, alkaline earth metals, transition metals, basic metals, lanthanides (rare earth elements), and actinides. 

Explanation:

Answer:

Compound

Explanation:

This is because it made up of two elements that's is hydrogen and oxygen in the ratio of 2:1 respectively

Answer:

Compound

Explanation:

H2O isn't on the periodic table so it's not an element. H2O isn't a molecule because it's water. H2O isn't a mixture because it can't be seperated. So, it must be a copound.

Answer:

A.

Explanation:

Matter is neither created nor destroyed unless it is acted upon by a chemical force/change.

Answer:

Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate

Explanation:

. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white

Answer:

801 •C

Explanation:

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Explanation:

the difference between a nuclear bomb and a thermonuclear bomb is that :

A nuclear bomb derives it's destructive force from nuclear reaction. That is,fission reaction, fusion reaction or both.

While thermonuclear bomb derives it's own force from a chain reaction in which isotopes of hydrogen combines under extremely high temperature to form helium under a process known as nuclear fusion.

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Explanation: i don't know how can i know the moles in element?

Answer:

dohsf approval all or pow

Explanation:

Answer:

under me :)

Explanation:

There is water vapour present around us. When you put cold glass on a table, the water vapour comes in contact with the glass, and condenses, forming water droplets which are seen around the glass. Hope this helps

Answer:

d metallic is the sum of the following is not a primary function of the following method

Answer:

P2 = 0.91 atm

Explanation:

Using Gay-Lussac's Law for this question: P1/T1 = P2/T2

P1 = 101 kPa (dividing by 101.3 to convert to atm) = 0.99 atm

T1 = 23C (must be convert to Kelvin by plus 273.15) = 296.15K

T2 = 0C = 273.15K

P2 = ?

P1/T1 = P2/T2

(Multiply both sides by T2 to get rid of it).

273.15 x 0.99/296.15 = P2

P2 = 0.91 atm

answer

Explanation: i think 0.49

Answer:

The size of a red blood cell allows for more room to have more cells, The shape of a red blood cell allow it to trap and absorb oxygen

Explanation:

Red blood cells are very small, The shape of a red blood cell isn't just a sphere

censures hydrogen Oxygen

Answer:

v