H-H-C=C-H-H + Br—Br —> H-H-Br- C-C-H-Br-H

The number of molecules in one mole of hydrogen gas is 6.02 × 10²³ . The number of molecules in 10 moles of hydrogen gas is then 6.022 ×10²⁴.

Any substance  that contains   6.022 × 10²³ number of atoms is called ne mole of that substance. This number is called Avogadro number. Hence, one mole of every elements contains Avogadro number of atoms.

Hydrogen  is the first element in periodic table. It is an alkali metal. The number of molecules  in one mole of H₂ is equal to Avogadro number. Mass of a molecule with one mole of amount is called its molecular mass.

Number of molecules of H₂ in one mole  =  6.02 × 10²³  

Then number of molecules in 10 moles is Avogadro  number times the number of moles.

= 10 × 6.022 × 10²³ =  6.022 ×10²⁴ molecules

Therefore, 10 moles of  H₂ contains  6.022 ×10²⁴molecules..

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In an ecosystem, deep, cold water is the  densest while warm, shallow water is the  least dense.

An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

A. 1.50

Explanation:

9.01 x 1023 molecules* 1 mol/ 6.022×1023 molecules= 1.49618067087 moles

Rounded would be 1.50

Answer:

i bought it cuz i need a cup?

Explanation:

Answer:

Best chemistry ever tho

Explanation:

LOL

Answer:

jayfeather friend me

Explanation:

In a toasty kitchen, your dough may proof in as little as an hour (or less!). When the temperatures dip, it can take much longer—upwards of two or even three hours.

Answer:

radio waves are the sound waves that are produces by a radio

Explanation:

Answer:  

method for procuring ammonia

Explanation:

In the Haber process, atmospheric nitrogen is converted to ammonia by reacting it with hydrogen (H2)

Answer:

a- customary systems..

Answer:

A displacement reaction

Explanation:

This is because the chlorine reacts with the sodium bromide, forcing it to go brown.

I hope this helps, good luck! (✿◡‿◡)

When chlorine is added to a solution of sodium bromide (either as a gas or dissolved in water), the bromine is replaced by the chlorine.

In chemistry, a solution is a homogeneous mixture of two or more compounds in their relative proportions that can be continually altered up to what is referred to as the limit of solubility.

Although the word "solution" is typically used to refer to the liquid state of matter, solutions of gases and solids are also possible.

When chlorine is added to a solution of sodium bromide (either as a gas or dissolved in water), the bromine is replaced by the chlorine. Because chlorine is more reactive than bromine, sodium bromide loses its bromine content. The mixture darkens to brown. The bromine has been displace, giving this colour of brown.

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the answers is cacih2

wjdgagqjdhdgahahdhvddvvsvshsd

The wavelength of the wave in brass medium, given that the wave has a frequency of 300 Hz is 16 m (Option D)

The wavelength of a wave is defined according to the following formula:

Velocity (v) = wavelength (λ) × frequency (f)

Divide both sides by frequency

Wavelength (λ = Velocity (v) / frequency (f)

With the above formula, we can obtain the wavelength of the wave in the brass medium. Details below:

Wavelength (λ = Velocity (v) / frequency (f)

Wavelength in brass = 4700 m/s / 300 Hz

Wavelength in brass= 16 m

Thus, we can conclude that the wavelength is 16 m (Option D)

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Answer:

3.38 x 10⁴cm³

Explanation:

Given that:

      Volume of the substance  = 3.83 x 10⁷mm³

The problem entails use to convert from mm³ to cm³;

                    1000mm³   = 1cm³

So;

          3.83 x 10⁷mm³ will produce [tex]\frac{ 3.83 x 10^{7} }{1000}[/tex]    = 3.38 x 10⁴cm³

Answer:

9.5 m

Explanation:

First, divide 4.75 m by the 0.50 l

4.75/0.50

This leaves you with 9.5 m

Answer:

d

Explanation:

the more movement the more energy

Answer:

6,9

Explanation:

Answer:

plz mark as brainliest

Explanation:

A saturated solution of sodium bicarbonate is reacted with hydrochloric acid to form carbon dioxide gas.

Answer:

Table salt forms as well as water and carbon dioxide

Explanation:

NaHCO3 (aq) + HCl (aq) --> NaCl (aq) + CO2 (g) + H2O (l)

Tectonic forces do not cause plates to slide over and under each other, to produce heat and pressure which forms igneous rocks

The rock cycle is a cycle which describes how the three basic rock types are related and how earth processes convert one rock type into another over geologic time.

Plate tectonic forces together with weathering and erosional processes, are responsible for the rock cycle.

Tectonic forces play the following roles in rock cycle:

Therefore, the statement that when plates slide over and under each other, the heat and pressure form igneous rocks is not True.

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Answer:

Matter

Explanation:

All matter is made up of substances called elements

Answer:

720+450 = 1170 it's 1170

426.32mL (rounded)

The formula for finding V2 is P1 • V1/P2 and since standard pressure (1atm) is equal to 760 P2 would be 760.

720mmHg • (450mL/760mmHg) = 426.32mL

Answer: false

Explanation:

there are no more then 112 known elements.

Answer:

false

Explanation:

their are only 118 element

Answer: Fish

Explanation:

Biotic factor is one of the component of the ecosystem. It is the living component of the ecosystem. It is affected or influenced by the non-living or abiotic components of the ecosystem like water, air, sunlight, and others. Fish is an example of biotic factor which is dependent on abiotic component that is oxygen which is the chief gas required for the breathing. The oxygen is one of the components of the water. So, the oxygen is dissolved in water and the fish acquire the oxygen through water only.

Answer: b

Explanation: had the same question

Answer: 8 Moles of Oxygen

Explanation: The formula shows that there are (exactly) 4 oxygen atoms in each mole or formula unit. Therefore 4 * 2.00 = 8.

Answer:

I believe it is A. The Periodic Table is organized in order of atomic number.

Explanation:

Answer:

Copper electrical wires are safer to use than wires made of most other conductive metals because they are resistant to heat. As you can see, copper is the preferred metal for electrical wires for several reasons. It has high electrical conductive; it's inexpensive; it's ductile; and it's thermal resistant.

Answer:

56

Explanation: