Determine the energy change in the following reaction. This reaction is considered ...
C6H12 + O2
CO2 + H2O + heat
energy absorbed is equal to the energy released
endothermic
O isothermic
O exothermic

Answer: 2.5c3

Explanation: Your welcome!

Answer:

14.2g of sodium phosphate are required

Explanation:

To solve this question we need to find the moles of Ca²⁺ and Mg²⁺ ions. And based on the reactions:

3Ca²⁺ + 2PO₄³⁻ → Ca₃(PO₄)₂ (s)

3Mg²⁺ + 2PO₄³⁻ → Mg₃(PO₄)₂ (s)

we can find the moles of phosphate required to precipitate all these ions and its mass:

Moles Ca²⁺:

1.0L * (0.055mol / L) = 0.055mol

Moles Mg²⁺:

1.0L * (0.075mol / L) = 0.075mol

Total moles = 0.13 moles of ions

Moles of phosphate ion required:

0.13 moles * (2 moles PO₄³⁻ / 3 moles ions) = 0.0867 moles PO₄³⁻

The moles of sodium phosphate (Na₃PO₄) are = 0.0867 moles

The mass is -Molar mass Na₃PO₄: 164g/mol-:

0.0867 moles Na₃PO₄ * (164g / mol) =

Answer: I think 35

Explanation:

Answer:

a, c, d

Explanation:

biosphere atmosphere hydrosphere lithosphere

Answer:

WHat did u mean?

C

It’s wrong I need points

The rock cycle includes the geosphere, hydrosphere, biosphere, and atmosphere. The wearing of the rock particles is called weathering. Thus, option a is correct.

Weathering is the process of sediment formation where the parent rocks and substances get disintegrated through natural biochemical and physical factors.

The parent rocks get deteriorated into smaller fine particles and sediments by the action of the strong wind and water. The movement causes the particles to dissolve the minerals on the surface.

The method of weathering, erosion, deposition, and compaction/ cementation is the part of the rock cycle that comprises the four major spheres including geosphere, hydrosphere, biosphere, and atmosphere.

Therefore, option a. in weathering the particles get disintegrated due to air and water.

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Answer:

C

Explanation:

I hope this is correct and have a great day

Answer:

1) first order

2) zero order

3) second order

Explanation:

For a first order reaction, the concentration of the reactants varies exponentially with the rate of reaction. The curve of a first order reaction shows an exponential relationship between the rate of reaction and the change in the concentration of reactants.

For a zero order reaction, the rate of reaction is independent of the concentration of the reactants. So, regardless of the amount of reactant in solution, the rate of reaction is constant.

For a second reaction, the reaction rate increases in direct proportion to the concentration of the reactant in solution.

A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals.

Answer:

Metalloid, in chemistry, an imprecise term used to describe a chemical element that forms a simple substance having properties intermediate between those of a typical metal and a typical nonmetal. There is no single property which can be used to unambiguously identify an element as a metalloid.

Answer:

297.15kelvin is the correct answer

Answer:297 k

Explanation:

Answer:

Gas exchange occurs in microscopic dead-end air-filled sacs called alveoli, where a very thin membrane (called the blood-air barrier) separates the blood in the alveolar capillaries (in the walls of the alveoli) from the alveolar air in the sacs.

Explanation:

Answer:

Elements with the same number of electrons in their outermost shell show similar chemical properties. Example 1: Fluorine, chlorine, bromine, and iodine each have 7 electrons in their outermost shell. These so-called halogens are also quite similar in their chemical behavior.

Answer:

Yup it is acceptable.

U comparing yourself will place u above and below some people for sure.

So you will know to where you have to develop and can get yourself satisfied as you will be above some people.

Gauging yourself against others is acceptable in competitive sports is acceptable.

Faster, higher, stronger is the Olympic motto frequently used in competitive sports. The Olympic slogan "To be there is everything" causes confusion, although it is actually highly false and the complete reverse.

Competitive athletes receive a planned training program. To attain particular objectives, the quantity and quality of each individual training block are carefully calculated.

The scope, duration, number, and load of each individual training unit are adjusted according to the level of fitness and the proximity to the season's peak throughout the year.

Therefore, Gauging yourself against others is acceptable in competitive sports is acceptable.

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Answer:

4

Explanation:

three carbon atoms combined with six hydrogen atoms

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option D.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound.  Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

Covalent compounds are formed between elements whose electronegativity difference is not very high. Covalent compounds are soft, these compounds have low melting and boiling point. The given compound is C₃H6.

Therefore, the correct option is option D.

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Answer:

The answer is 98.07848. We assume you are converting between grams H2SO4 and mole. You can view more details on each measurement unit: This compound is also known as Sulfuric Acid. The SI base unit for amount of substance is the mole. 1 grams H2SO4 is equal to 0.010195916576195 mole.

Quick conversion chart of moles H2SO3 to grams

1 moles H2SO3 to grams = 82.07908 grams

2 moles H2SO3 to grams = 164.15816 grams

3 moles H2SO3 to grams = 246.23724 grams

4 moles H2SO3 to grams = 328.31632 grams

5 moles H2SO3 to grams = 410.3954 grams

6 moles H2SO3 to grams = 492.47448 grams

7 moles H2SO3 to grams = 574.55356 grams

8 moles H2SO3 to grams = 656.63264 grams

9 moles H2SO3 to grams = 738.71172 grams

10 moles H2SO3 to grams = 820.7908 grams

Answer:

d

Explanation:

d

Answer:

D. Can produce crops having high level of nutrition.

Explanation:

Some benefits of genetic engineering in agriculture are increased crop yields, reduced costs for food or drug production, reduced need for pesticides, enhanced nutrient composition and food quality, resistance to pests and disease, greater food security, and medical benefits to the world's growing population.

Three benefits to genetic engineering are the crops can survive better, leading the farmers to make more money, the crops can grow in more locations, and the plants can be modified to help people

Answer:

[tex]m_{HBO_2}=441.8gHBO_2[/tex]

Explanation:

Hello there!

In this case, since the combustion of B2H6 is:

[tex]B_2H_6+3O_2\rightarrow 2HBO_2+2H_2O[/tex]

Thus, since there is 1:2 mole ratio between the reactant and product, the produced grams of the latter is:

[tex]m_{HBO_2}=139.5gB_2H_6*\frac{1molB_2H_6}{27.67gB_2H_6} *\frac{2molHBO_2}{1molB_2H_6} *\frac{43.82gHBO_2}{1molHBO_2}[/tex]

[tex]m_{HBO_2}=441.8gHBO_2[/tex]

Best regards!

Answer:

189

Explanation:

189

The relative formula mass of Zn(NO₃)₂ is 189.38g.

Molecular mass of any formula of compound will be calculated by adding the molar mass of each atoms present in the given compound.

Molecular mass of Zn(NO₃)₂ = Sum of the molar mass of Zinc, nitrogen and oxygen atoms.

Molecular mass of Zn(NO₃)₂ = 65.38g/mol + 2(14g/mol) + 6(16g/mol) = 189.38g

Hence the required mass of Zn(NO₃)₂ is 189.38g.

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Answer:

C.

Explanation:

Specific heat capacity of a substance can be defined as the amount of heat a gram of the substance must lose or absorb in order to change its temperature by a degree Celsius. It is measured in Joules per kilogram per degree Celsius (J/kg°C).

Generally, the specific heat capacity of water is 4.182J/kg°C and is the highest among liquids.

Heat capacity or quantity of heat is given by the formula;

[tex] Q = mcdt[/tex]

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of the substance.

dt represents the change in temperature.

Hence in calculating the relationship between the amount of heat added to a substance and the corresponding temperature change, the specific heat capacity is usually represented by the symbol C.

Answer:

CCl4 - Nonpolar

CH3OH - polar

NH3 - polar

CS2 - Nonpolar

Explanation:

One important thing that we should know is that polarity has to do with the presence of a resultant dipole moment in a molecule.

Dipole moment is a vector quantity, This means that its direction is also taken into account when discussing the dipole moment of molecules.

Hence, symmetrical molecules such as CS2 and CCl4 are non-polar even though they have polar bonds because their dipoles cancel out(zero resultant dipole moment).

On the other hand, NH3 and CH3OH are non-symmetrical molecules hence they possess an overall dipole moment and are polar molecules.

Answer:

 the total gas pressure after one half-life is 4.38 atm

Explanation:

The balanced equation for the decomposition of N2O to N2 and O2 is given as:

2N₂O(gas) ⇒ 2N₂(gas) + O₂(gas)

2 moles of N₂O produce 2 moles of N₂ and 1 mole of O₂

The change in pressure depends on the coefficient (number of moles) of the reactant and product.

                                                          N₂O                    N₂                     O₂

number of moles                                2                        2                        1

Initial pressure (atm)                           3.50                  0                        0

change in pressure                            -2x                    +2x                      x

Final pressure (atm)                            3.50 - 2x           2x                       x

The total final pressure is the sum of the individual total pressure. i.e.:

Total final pressure = final pressure of N₂O + final pressure of N₂ + final pressure of O₂

Total final pressure = (3.5 - 2x) + (2x) + x

Total final pressure = 3.5 + x

After one half life, the initial pressure of N₂O would be half its value.

Final pressure of N₂O = half of the initial pressure of N₂O

3.5 - 2x = 0.5(3.5)

3.5 - 2x = 1.75

2x = 1.75

x = 0.875 atm

Therefore, Total final pressure = 3.5 + x = 3.5 + 0.875

Total final pressure = 4.38 atm to 3 significant figures

Answer:

See explanation

Explanation:

A non elementary reaction is a reaction that does not take place in a single reactive encounter. Non elementary reactions take place in steps. These steps are referred to as the reaction mechanism.

The reaction between nitric oxide and oxygen is a non elementary reaction. It takes place in two steps as i will now show below;

Step 1

NO(g) + O2(g) -------> NO2(g) + O(g)

Step 2

NO(g) + O(g) ---------> NO2(g)

Overall reaction equation

2NO(g) + O2(g) ----------> 2NO2(g)

Answer:

NO(g)+O(g)---> NO_2(g)

Explanation:

Answer:

CuCl₂·4H₂O

Explanation:

First we calculate the moles of copper (II) ion in the solution, using the given volume and concentration:

For each Cu⁺² mol there's also one CuCl₂ mol.

We convert 0.01 CuCl₂ moles into grams, using its molar mass:

That means that out of the 2.060 g of the sample, 1.344 g are of CuCl₂. This means that there are (2.060 - 1.344) 0.716 g of water.

We convert those 0.716 g of water to moles:

There are four times as many H₂O moles as there are CuCl₂ moles. This means the formula is CuCl₂·4H₂O

Answer:

you never gave us the choices to go over. sorry

Answer:

k = 2.17E-2 s-1

Explanation:

Initial Concentration [A]o = 0.380 M

Final Concentration [A] = 0.215 M

time, t = 26.3 s

Unit of rate constant =  s-1

Rate constant = ?

The units of the rate constant depends on the order of the reaction. This is a first order reaction due to the units.

The integral rate law for a first order reaction is;

ln[A] = ln[A]o - kt

ln(0.215) = ln(0.380) - k(26.3)

ln(0.215) - ln(0.380) = - k(26.3)

- k(26.3) = -0.57

k = 0.57 / 26.3 = 0.02167

Reporting to three significant figures using E notation;

k = 2.17E-2 s-1