How many moles are equal to 13.25 g of water, H2O?

Answer:  It is more difficult to remove a valence electron from a Chlorine (Cl) atom

Explanation:

Ionization energy is the energy required to remove the valence electron from an isolated gaseous atom.

Magnesium (Mg) is the 12th element of periodic table and has an atomic number of 12. The electronic configuration is 2, 8, 2. It can easily lose its valence 2 electrons to attain stable configuration.

Chlorine (Cl) is the 17th element of periodic table and has an atomic number of 17. The electronic configuration is 2, 8, 7. It has a tendency to gain electron to attain stable configuration. It cannot lose its valence electron easily as the valence electrons experience more nuclear charge.

Thus it is more difficult to remove a valence electron from a Chlorine (Cl) atom

Chlorine(Cl) is the more difficult to remove a valence electron from which is

because it needs one electron to achieve a stable octet configuration.

Magnesium (Mg) is an element which has an atomic number of 12. The

electronic configuration is 2, 8, 2. This means it has to lose its  2 valence

electrons needed to attain a stable octet configuration.

Chlorine (Cl) is an element which has an atomic number of 17. The electronic

configuration is 2, 8, 7. This means it has to gain one valence electrons

needed to attain a stable octet configuration.

Thus it is more difficult to remove a valence electron from a Chlorine (Cl)

atom than Magnesium atom.

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Answer:

Flashlight

Explanation:

A flashlight gives out heat

hope this helps...

Answer:

Explanation:

The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom. ... (10-15 m is typical for the smaller nuclei; larger ones go up to about 10 times that.) Mass. Although it is very small, the nucleus is massive compared to the rest of the atom.

Answer:784.532 newton

Answer:

atomic number of phosphorous is 15. It has zero charges because it has equal number of protons and electrons

Explanation:

1. 9.36 moles S

2. 0.213 moles Al

Given

Reaction

2Al+3S⇒Al₂S₃

Required

moles of S

moles of Al

Solution

The reaction coefficient in a chemical equation shows the mole ratio of the compounds involved in the reaction (reactants or products)

From equation, mol ratio of Al₂S₃ : S = 1 : 3, so mol S :

= 3/1 x mol Al₂S₃

= 3/1 x 3.12

= 9.36 moles S

From equation, mol ratio of Al : S = 2 : 3, so mol Al :

= 2/3 x mol S

= 2/3 x 0.32

= 0.213 moles Al

Answer:

A chemical change

Explanation:

The marshmallow turning brown and bubbling implies that a chemical change has taken place.

For chemical changes to occur, we observe any of the following:

ii. Two signs that shows a chemical change has taken place is that:

Explanation:

kinetic energy is the energy an object has while in motion, if I'm walking I have kinetic energy

Answer:

Kinetix energy: of an object is the energy that it possesses due to its motion. ( nvm sorry youre working on chemistry)

Answer:

A component's mass number (A) is the amount of the quantity of protons and the quantity of neutrons. The little commitment of mass from electrons is dismissed in ascertaining the mass number.

Explanation:

The given question is an incomplete question, the complete question is given below.

Use this equation to answer the questions that follow.

[tex]3O_2(g)+N_2(g)\rightarrow 2NO_3(g)[/tex]

5 moles of oxygen gas are present. How many moles of [tex]NO_3[/tex] will be produced with this amount of oxygen gas?

Answer : The moles of [tex]NO_3[/tex] produced will be 3.33 moles.

Explanation : Given,

Moles of oxygen gas = 5 moles

Now we have to calculate the moles of [tex]NO_3[/tex].

The given balanced chemical equation is:

[tex]3O_2(g)+N_2(g)\rightarrow 2NO_3(g)[/tex]

From the balanced chemical equation we conclude that,

As, 3 moles of [tex]O_2[/tex] gas react to produces 2 moles of [tex]NO_3[/tex] gas

So, 5 moles of [tex]O_2[/tex] gas react to produces [tex]\frac{2}{3}\times 5=3.33[/tex] moles of [tex]NO_3[/tex] gas

Therefore, the moles of [tex]NO_3[/tex] produced will be 3.33 moles.

Answer:

A

Explanation:

In a hot car, the air molecules are heated, which cause them to speed up. The fast speed of these air molecules cause them to bounce off each other and the walls faster and harder, which will increase the pressure in the car.

We have that what happens inside a closed car on a hot day is

From the question we are told

What happens inside a closed car on a hot day?

A. The pressure inside the car increases.

B. The number of molecules increases.

C. The volume inside the car increases.

D. The molecules of gas slow down.

Generally

Inside a closed car on a hot day the volume inside a car increases.

the molecules of gas gets active with increase in kinetic energy of the molecules increases hitting the walls of the car and the sun also expands the metal walls of the car

Thereby increasing the pressure of molecules in the car

Inside a closed car on a hot day the volume inside a car increases.

Hence

What happens inside a closed car on a hot day is

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The theoretical yield of urea : = 227.4 kg

Given

Reaction

2NH3(aq)+CO2(aq)→CH4N2O(aq)+H2O(l)

128.9 kg of ammonia

211.4 kg of carbon dioxide

166.3 kg of urea.

Required

The theoretical yield of urea

Solution

mol Ammonia (MW=17 g/mol)

=128.9 : 17

= 7.58 kmol

mol CO₂(MW=44 g/mol) :

= 211.4 : 44

= 4.805 kmol

Mol : coefficient of reactant , NH₃ : CO₂ :

= 7.58/2 : 4.805/1

=3.79 : 4.805

Ammonia as limiting reactant(smaller ratio)

Mol urea based on mol Ammonia :

=1/2 x 7.58

=3.79 kmol

Mass urea :

=3.79 kmol x 60 g/mol

= 227.4 kg

Answer:

Decomposition

Explanation:

H2CO3 Breaks down to H2O and CO2

Answer:

Exothermic reaction for the HCl, endothermic reaction for the water

[tex]2803.28\ \text{J}[/tex]

Explanation:

Heat was lost by HCl as its temperature lowered, so it was an exothermic reaction for the HCL.

Heat was gained by water as its temperature increased, so it was an endothermic reaction for the water.

m = Mass of water = 100 g

c = Specific heat of water = [tex]4184\ \text{J/kg}^{\circ}\text{C}[/tex]

[tex]\Delta T[/tex] = Change in temperature of water = [tex](31.3-24.6)^{\circ}\text{C}[/tex]

Heat is given by

[tex]Q=mc\Delta T\\ =0.1\times 4184\times (31.3-24.6)\\ =2803.28\ \text{J}[/tex]

Heat gained by water is [tex]2803.28\ \text{J}[/tex].

Answer:

Mud

Explanation:

Mud is a solid mass and water is a liquid mass.  The water takes some attributes of the solid and mixes the two forms of matter.  both masses create mud  it's basic alchemy

Answer:

1) Mass =  890.96 g

2) Mass =  7.67 g

3) 507.65 ×10²³ atoms

Explanation:

1) Given data:

Number of moles of lead = 4.3×10⁻³ mol

Mass of lead = ?

Solution:

Mass = number of moles × molar mass

Molar mass of lead = 207.2 g/mol

by putting values,

Mass = 4.3×10⁻³ mol × 207.2 g/mol

Mass =  890.96 g

2) Given data:

Number of atoms of antimony = 3.8×10²² atoms

Mass of antimony = ?

Solution:

1 mole contain 6.022 ×10²³ atoms

3.8×10²² atoms × 1 mol / 6.022 ×10²³ atoms

0.63×10⁻¹ mol

0.063 mol

Mass:

Mass = number of moles × molar mass

Molar mass of lead = 121.76 g/mol

Mass = 0.063 mol ×  121.76 g/mol

Mass =  7.67 g

3) Given data:

Mass of tungsten = 15.5 Kg (15.5 kg × 1000 g/ 1kg = 15500 g)

Number of atoms = ?

Solution:

Number of moles of tungsten:

Number of moles = mass/molar mass

Number of moles = 15500 g / 183.84 g/mol

Number of moles = 84.3 mol

1 mole contain 6.022 ×10²³ atoms

84.3 mol  × 6.022 ×10²³ atoms / 1mol

507.65 ×10²³ atoms

Answer:

yes

Explanation:

big brain

Answer:

5 1 2 4and 3 this is correct way

Explanation:

An element is a distinct substance that cannot be split - up into simpler substances. Such substances consist of only one kind of atom.

From the list, the elements are:

helium

aluminum

A compound is substance composed of two or more kinds of atoms or elements joined together in a definite grouping. The properties of a compound are distinct and different from those of the individual elements that are combined in its make - up.

methane

water

Table sugar

A mixture is a substance made up of indefinite composition. The constituents reacts differently to changed conditions. They are easily separated into constituents by physical methods.

Vinegar

Steel

Milk

Answer:

Explanation:

ok if yes do follow

Answer:

maybe 2455.2, good luck

Answer:

4 CO + 8 H2 -> 4 CH3OH

Hope that it works

Answer:

b) 2

Explanation:

The Wurtz reaction is a reaction in which the hydrocarbon chain in lengthened by reaction two alkyl halides with sodium. The reaction is carried out in dry ether.

When methyl iodide reacts with  ethyl iodide, two products are formed; the hydrocarbon product and sodium iodide.

                              Na/Ether

CH3CH2I + CH3I ----------> CH3CH2CH3 + 2NaI

Answer:

2)Both the salt dissolving and the evaporation of water are physical changes.

Explanation:

The two kinds of changes that has occurred are both physical changes.

Dissolution of a solute such as salt in water and evaporation of water from a solution are physical changes.

A physical change is one in which the physical property of matter is altered. Particularly the state and the form.

In many of these cases, the change is easily reversible.

Since this change is reversible in that we were able to collect the salt back, this is a physical change.

Answer:

It would be thermal energy.

Explanation:

Thermal energy is the energy transfer of heat which is created while doing physical activity.