Exothermic or Endothermic ~N2(g) + 2 O2(g) → 2 NO2(g) ΔH= +67.6 kJ

Explain why?

Answer: Nerves, Brain and spinal cord

Explanation:the other choices are either part of the cardiovascular system or the respiratory system

Answer:

1.031atm

Explanation:

It's the eye because it's the organ of sight

Answer: 44.706g Al2O3

Explanation:

4A1 + 302 → 2Al2O3

3×(16×2) 2{(27×2)+(16×3)}

= 96 = 204

So

To produce 204g of Al2O3,We need . 96g of O2

To produce 1g of Al2O3,We need

. (96÷204)= 0.47g of O2

To produce 95g of Al2O3,We need

. (0.47×95)= 44.706g of O2

.

So, 44.706 grams of oxygen (O2)

are needed to produce 95 grams of

aluminum oxide (Al2O3).

Answer: Hello, This is my most favorite class so I know this is right.

The most Reactive metal source is Copper.

Explanation:

This is the most reactive because it contains Lithium supplement.

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Answer:

a) 226.6 grams of Cl₂

b) 19.2 grams of C

c) 303.2 grams of TiCl₄ and 70.4 grams of CO₂

Explanation:

The balanced chemical reaction is the following:

TiO₂(s) + C(s) + 2 Cl₂(g) → TiCl₄(s) + CO₂(g)

(a) What mass of Cl₂ gas is needed to react with 1.60 mol TiO₂?

From the chemical equation, 1 mol of TiO₂ reacts with 2 moles of Cl₂. So, the stoichiometric ratio is 2 mol Cl₂/1 mol TiO₂. We multiply this ratio by the moles of TiO₂ we have to calculate the moles of Cl₂ we need:

1.60 mol TiO₂ x 2 mol Cl₂/1 mol TiO₂ = 3.2 mol Cl₂

Now, we convert from moles to mass by using the molecular weight (MW) of Cl₂:

MW(Cl₂) = 35.4 g/mol x 2 = 70.8 g/mol

mass of Cl₂= 3.2 mol x 70.8 g/mol = 226.6 g

Therefore, 226.6 grams of Cl₂ are needed to react with 1.6 mol of TiO₂.

(b) What mass of C is needed to react with 1.60 mol of TiO₂?

From the chemical equation, 1 mol of TiO₂ reacts with 1 moles of C(s). So, the stoichiometric ratio is 1 mol C/1 mol TiO₂. We multiply this ratio by the moles of TiO₂ we have to calculate the moles of C(s) we need:

1.60 mol TiO₂ x 1 mol C(s)/1 mol TiO₂ = 1.60 mol C(s)

So, we convert the moles of C(s) to grams as follows:

MW(C) = 12 g/mol

1.60 mol x 12 g/mol = 19.2 g C(s)

Therefore, a mass of 19.2 grams of C is needed to react with 1.60 mol of TiO₂.

(c) What is the mass of all the products formed by reaction with 1.60 mol of TiO₂?

From the chemical equation, we can notice that 1 mol of TiO₂ produces 1 mol of TiCl₄ and 1 mol of CO₂. So, from 1.60 moles of TiO₂, 1 mol of each product will be produced:

1 mol TiO₂/1 mol TiCl₄ ⇒ 1.60 mol TiO₂/1.60 mol TiCl₄

1 mol TiO₂/1 mol CO₂ ⇒ 1.60 mol TiO₂/1.60 mol CO₂

Finally, we convert the moles to grams by using the molecular weight of each compound:

MW(TiCl₄) = 47.9 g/mol Ti + (35.4 g/mol x 4 Cl) = 189.5 g/mol

1.60 mol x 189.5 g/mol = 303.2 g

MW(CO₂) = 12 g/mol C + (16 g/mol x 2 O) = 44 g/mol

1.60 mol x 44 g/mol = 70.4 g

Therefore, from the reaction of 1.60 mol of TiO₂ are formed 303.2 grams of TiCl₄ and 70.4 grams of CO₂.

Answer:

Cows and other ruminant animals (like goats and sheep) emit methane, a potent greenhouse gas, as they digest grasses and plants. This process is called “enteric fermentation,” and it's the origin of cows' burps.

Explanation:

Answer: 0.16 g H2

Explanation:

Mg+ H2SO4= MgSO4 + H2

Atomic massof Mg is 24

Molecular mass of H2 is 2

So,

24g Mg produce 2 g H2

1g Mg produce (2÷24)= 0.083 g H2

2.00g Mg produce (0.083×2) g H2

   = 0.16 g H2

 0.16g of hydrogen is formed when 2.00g of magnesium.

The mass of hydrogen gas formed when 2.00g of magnesium is equal to 0.165 g.

The chemical equation of a reaction is said to be a balanced equation when the number of atoms of substances is equal on either side of the equation.

Evergy balanced chemical equation must follow the law of conservation of mass according to which the total mass of the substances present on the reactant side should be equal to the total mass of substances present on the product side.

Given, the balanced chemical equation of the reaction of Mg and sulfuric acid:

[tex]Mg + H_2SO_4 \longrightarrow MgSO_4 +H_2[/tex]

One mole of magnesium produces hydrogen gas = 1mol

Given the mass of magnesium = 2g

The number of moles of Mg = 2/24.3 = 0.082 mol

Then the number of moles of hydrogen gas formed = 0.082 mol

The mass of the hydrogen gas = 0.082 × 2 = 0.165 g

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Bohr: Electrons move in circular paths that have different energies.

Thomson: Atoms contain electrons.

Dalton: Matter is made up of indivisible atoms.

Schrodinger and others: Electrons exist in a cloud of probability.

Rutherford: The mass of an atom is concentrated in its center.

Answer:

The screenshot shows all the answers

Explanation:

Answer:

B

Explanation:

Weathering is the physical and chemical breakdown of rock at the earth's surface. ... The physical breakdown of rock involves breaking rock down into smaller pieces through mechanical weathering processes. These processes include abrasion, frost wedging, pressure release (unloading), and organic activity.

Answer:

[tex]K=1.12x10^9[/tex]

Explanation:

Hello there!

Unfortunately, the question is not given in the question; however, it is possible for us to compute the equilibrium constant as the problem is providing the concentrations at equilibrium. Thus, we first set up the equilibrium expression as products/reactants:

[tex]K=\frac{[NO_2]^2}{[NO]^2[O_2]}[/tex]

Then, we plug in the concentrations at equilibrium to obtain the equilibrium constant as follows:

[tex]K=\frac{(0.95)^2}{(0.0024)^2(0.00014)}\\\\K=1.12x10^9[/tex]

In addition, we can infer this is a reaction that predominantly tends to the product (NO2) as K>>>>1.

Best regards!

Answer:

I think it is either a or b

Explanation:

c or d has the correct names and Roman numerals.

Answer:

Granite

Explanation:

Answer:

Granite

Explanation:

Igneous forms when rock is cooled and hardens by Magma.

And the option granite, which forms as magma cools deep underground

Hope it helps have a Good Day

Answer:

iron and carbon:steel:copper and tin: metal

Molality = moles of solute/mass (in kg) of solvent

The solute here is NaCl, of which you have 40 g or 40/58.4428 = 0.6844 moles NaCl.

The solvent here is water, of which you have 1500 g or 1.500 kg H2O.

The molality of the resulting solution would thus be 0.6844 moles NaCl/1.500 kg H2O = 0.4562 mol/kg.

If you have to consider sig figs, then your final answer would have one sig fig (40 g has one sig fig). In that case, your final answer would be 0.5 mol/kg.

Answer:

Ture

Explanation:

Ture

True

True

True

Answer:

XCl₂ + 2AgNO₃ —> X(NO₃)₂ + 2AgCl

The coefficients are: 1, 2, 1, 2

Explanation:

XCl₂ + AgNO₃ —> X(NO₃)₂ + AgCl

The equation can be balance as follow:

XCl₂ + AgNO₃ —> X(NO₃)₂ + AgCl

There are 2 atoms of Cl on the left side and 1 atom on the right side. It can be balance by writing 2 before AgCl as shown below:

XCl₂ + AgNO₃ —> X(NO₃)₂ + 2AgCl

There are 2 atoms of Ag on the right side and 1 atom on the left side. It can be balance by writing 2 before AgNO₃ as shown below:

XCl₂ + 2AgNO₃ —> X(NO₃)₂ + 2AgCl

Now, the equation is balanced.

The coefficients are: 1, 2, 1, 2

Answer:

S + 4 Cl2

Explanation:

Sulphur - S

1 mol of Sulphur = S

Chlorine = Cl2

4 moles of Chlorine = 4Cl2

4S + 2Cl2

Incorrect option

S + 4 Cl2

Correct option

S + 2Cl2

Incorrect option

S + Cl2

Incorrect option

Answer:

DONT CLICK THAT LINK THAT IS HACK AND VIRUS

Explanation:

Answer:

All igneous rocks the basis of the rock cycle are formed by plate tectonics. ... The heat from the mantle that fuels plate tectonics causes both igneous and sedimentary rocks to be turned into metamorphic rocks. The metamorphic rocks can be eroded into sedimentary rocks are remelted back into igneous.

Explanation:

Answer: Lithium, an alkali metal with three electrons, is also an exception to the octet rule. Lithium tends to lose one electron to take on the electron configuration of the nearest noble gas, helium, leaving it with two valence electrons. There are two ways in which atoms can satisfy the octet rules.

Explanation: Hope this helped! :)

Answer:

In the middle of the forest.

Explanation:

They have to bury the remains in the middle of the forest at the Forensic Osteological Research Center in order to study the decomposition of the dead person. By studying the decomposition of dead person we can get a lot of information which can be used in the study of criminal cases and solving of crimes. The middle place in the forest is a perfect place to bury the remains due to presence of huge amount of microbes as well as insect that helps in the decomposition.

Answer: the answer is 12M

Explanation: 3.0mol/ 0.25L =12M

12M is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution.

The amount of molecules of molecules divided by the quantity of liters in solution is the definition of molarity, a concentration unit in chemistry. It is crucial to comprehend how it is calculated as well as when to employ it in comparison to other units because it is among the most widely used concentration units.

A chemical solution's concentration is measured in molarity (M). It refers to the solute's moles per liter of solution. To be clear, this is not the same as the liters of solvents (a common mistake).

molarity = number of moles of solute/ volume of solution in litre

molarity =3.0mol/ 0.25L

             =12M

Therefore, 12M is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution.

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Answer: approximately 15.1 grams.

Explanation: The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want. Change 25 grams of potassium chlorate to moles. Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron. 1 K x 39 grams/mole+1 Cl x 35.4grams/ mole+3 O x 16 grams/ mole = 122.4 grams / mole Potassium Chlorate 25 122.4 = moles. 2.05 moles of Potassium Chlorate. There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride. 2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride. Find the gram molecular mass of Potassium Chloride. 1 K x 39 = 39+1 Cl x 35.4 = 35.4 = 74.4 grams / mole. 2.05 moles x 74.4 grams/ mole = 15.2 grams

The mass of O₂ that will be form is 9.8 grams

The chemical reaction is as follows:

2KClO₃ → 2KCl + 3O₂

From the reaction 2 moles of potassium trichlorate decompose to form 2 moles of potassium chloride and 3 moles of oxygen.

Therefore,

molar mass of KClO₃ = 39 + 35.5 + 48 = 122.5 grams

molar mass of O₂ = 32 grams

Therefore,

2(122.5) g of  KClO₃ produces 3(32) grams of O₂

25 g of KClO₃ will produce ? grams of  O₂

cross multiply

mass of O₂  produced = 96 × 25 / 245

mass of O₂  produced = 2400 / 245

mass of O₂  produced = 9.7959

mass of O₂  produced ≈ 9.8 grams

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Answer:

Explanation:  A conversion factor is a number used to change one set of units to another, by multiplying or dividing. When a conversion is necessary, the appropriate conversion factor to an equal value must be used. For example, to convert inches to feet, the appropriate conversion value is 12 inches equal 1 foot.

The theoretical yield is 6 sapphire rings.

This is the total product formed as a result of the complete conversion of

the reactants. In this scenario, the reactant is the 12 sapphires in which 2

of it is needed to produce one sapphire ring.

This however translates to the theoretical yield being 6 sapphire rings

which is gotten by:

2 sapphires = 1 ring

12 sapphires = x

Cross multiply

2x = 12

x= 12/2 = 6 sapphire rings.

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Answer:

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Answer:

2 FeCl2 + Cl2 -> 2 FeCl3

According to numbers in reaction

Amount of Cl2 is half of FeCl2

Explanation:

Explanation:

False, gray whales average 75 miles per day at a speed of 5 mph and is the longest annual migration of any mammal.

Answer:

That would be speed.

Explanation: