I answered all of the previous questions, but I'm not sure I understand questions 4 and 5, so I'm hoping you can assist me.

The amount, in grams, of [tex]N_2[/tex] that will be consumed to produce 265 grams of [tex]CaCN_2[/tex] will be 80.61 grams

From the equation of the reaction:

[tex]CaC_2 + N_2 --- > CaCN_2 + C[/tex]

The mole ratio of  [tex]N_2[/tex] consumed to   [tex]CaCN_2[/tex] produced is 1:1.

Mole of 265 grams of  [tex]CaCN_2[/tex] = 265/92.11 = 2.88 moles

Equivalent moles of  [tex]N_2[/tex] = 2.88 moles

Mass of 2.88 moles  [tex]N_2[/tex] = 2.88 x 28.02 = 80.61 grams

More on stoichiometric calculations can be found here:https://brainly.com/question/27287858

#SPJ4

Biological specimens are the preserved remains of the biological materials. Compound A. formaldehyde or formalin is used to preserve the specimens. Thus, option A is correct.

Fluid preserved specimens are the biological material of the organism that are kept at the store to study and analyze over a long time without getting any damage. Formaldehyde along with alcohol is the most common preservative.

Formaldehyde is an organic compound that is colorless and pungent in the smell that preserves the dead remains of the organisms intact. It is antiseptic and germicide in nature that makes them best for the purpose.

Therefore, option A. formaldehyde is used to preserve the specimens.

Learn more about formaldehyde here:

https://brainly.com/question/16977261

#SPJ1

Answer:

so i put a...

Explanation:

Edge doesnt give correct answers on unit tests, but i passed with an 88 :)

Correct me if im wrong!!

Answer:

Mole Ratio Fraction

Explanation:

That's the answer.......

Answer:

Explanation:

Mole Ratio Fraction

Answer:

To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ions

Currently, fossil fuels meet the 80% of needs of the society. But it is a non-renewable source, and it will extinct soon. The leading renewable source is wind power.

Non-renewable energy are the energies that will require a thousand of years to make and ones extinct, will not be prepared.

Renewable energy sources can be prepared again and again, examples are wind, solar, hydropower.

Thus, the fossil fuel and wind power is the leading source of energy that meets the needs of society.

Learn more about the renewable source

https://brainly.com/question/13258110

#SPJ1

Answer:

Answer below

Explanation:

Just draw a photo of someone pushing an object across a table. Your push is the force acting on the object you're pushing.

Say out loud what you want to remember.

Take notes by hand, not on a computer.

Chunk your study sessions.

Test yourself. A lot.

Change the way you practice.

Exercise regularly.

Get more sleep.

Learn several subjects in succession.

Let's see

[tex]\\ \rm\dashrightarrow k=\dfrac{Concentration\:of\: products}{Concentration\:of\: reactants}[/tex]

[tex]\\ \rm\dashrightarrow k=\dfrac{\left[A_2B_2\right]}{\left[A\right]^2\left[B\right]}[/tex]

Answer:

What is the hydrogen ion concentration of a solution labeled "Solution A", whose pH is 5.60? 

Tutorial

In this problem we are given pH and asked to solve for the hydrogen ion concentration. Using the equation, pH = − log [H+] , we can solve for [H+] as,

− pH = log [H+] ,

[H+] = 10−pH,

by exponentiating both sides with base 10 to "undo" the common logarithm. The hydrogen ion concentration of "Solution A" is,

[H+] = 10−5.6 ≈ 0.0000025 = 2.51 × 10−6 M.

We can always check our solution by computing −log (2.5 × 10−6) ≈ 5.6.

The total pressure of the mixture of the nobles gases in the container is determined as 9 atm.

The total pressure of the gasses is equal to the total pressure of the container.

Pt = P1 + P2 + P3

Pt = 1 atm (neon) + 2 atm (Argon) + 6 atm( xenon)

Pt = 9 atm

Thus, the total pressure of the mixture of the nobles gases in the container is determined as 9 atm.

Learn more about total pressure here: https://brainly.com/question/26101731

#SPJ1

The major problem with CFCs is that It is a greenhouse gas, Option A is correct.

Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.

They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.

CFCs are classified as halocarbons, a class of compounds that contain atoms of carbon and halogen atoms

The major problem with CFC's is that they are green house gases

It destroys ozone in the upper atmosphere (stratosphere).

CFCs can produce more than 10,000 times as much warming, pound for pound, once they are in the air.

It is not  only because of their dramatic warming potential  but also  

They were found to be the primary cause of the rapidly escalating destruction of the Earth’s ozone layer,

which protects the planet from dangerous, cancer-causing levels of ultraviolet radiation.

Therefore The major problem with CFCs is that It is a greenhouse gas, Option A is correct.

To know more about CFC'S

https://brainly.com/question/14330630

#SPJ1

Answer:

Fossil fuels release greenhouse gases and are non renewable

Answer:

increases the H + ion concentration in aqueous solution

Explanation:

An Arrhenius base is a compound that increases the OH − ion concentration in aqueous solution. Arrhenius theory, theory, introduced in 1887 by the Swedish scientist Svante Arrhenius, that acids are substances that dissociate in water to yield electrically charged atoms or molecules, called ions, one of which is a hydrogen ion (H+), and that bases ionize in water to yield hydroxide ions (OH−). Arrhenius Definition of acids. An acid is a substance that dissociates in water to produce H+ (hydrogen ions) Arrhenius Definition of strong acids. A strong acid is a substance that fully dissociates in water to give hydrogen ions. Arrhenius Definition of weak acids.

Balanced equation(That should be NaClO_3)

[tex]\\ \rm\Rrightarrow Cl_2+2NaOH\longrightarrow NaCl+NaClO_3+H_2O[/tex]

Remember that it's a ionic equation not general equation

So

We have to balance it accordingly

Answer:

Balanced equation(That should be NaClO_3)

\begin{gathered}\\ \rm\Rrightarrow Cl_2+2NaOH\longrightarrow NaCl+NaClO_3+H_2O\end{gathered}⇛Cl2+2NaOH⟶NaCl+NaClO3+H2O

Remember that it's a ionic equation not general equation

So

We have to balance it accordingly

Answer:

4198.97404999

Explanation:

In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.

Deforestation often leads to an increase in the number of endangered species of plants and or animals.

Deforestation refers to the conversion of forests to non-forest uses. In other words, it is the removal of forest layers for non-forest reasons.

Since forests represent a hotspot for plant and animal biodiversity, their removal automatically means a decrease in biodiversity.

Endangered species are species of plants and animals that are under the threat of going extinct either due to natural or anthropological effects.

Thus, deforestation often leads to an increase in the number of endangered species.

More on deforestation can be found here:https://brainly.com/question/11697527

#SPJ4

Answer:

b

Explanation:

Answer:

Refracting

Explanation:

Answer: atom

Explanation: molecule is a group or two or more atoms

protons and electron are subatomic particles

atom is the smallest unit of matter

Answer:

980,536.2 grams

Explanation:

The mass of a compound is equal to its moles times its molar mass.

The molar mass of PCl3 is 137.33 g/mol

137.33 x 7.14 x 10^3 = 980,536.2

Answer:

An exothermic reaction is happening, it is absorbing the cold.

Answer:

Acid: HSO4-

Base: NH3

Conjugate Acid: NH4+

Conjugate Base: SO4-2

Explanation:

HSO4- gives a H+ to NH3 making NH4+ the conjugate acid.

Same can be said to the base.

When natural conditions are present in a free market then, the natural monopoly arises. Dstv is unique and has no other substituents that make them an example of monopoly.

Monopoly is the dominance of a single product, goods, service, business, etc. in the market or the economic sector that excludes the other competitors. They can be the single seller that sells in the business.

DStv is a monopoly in America and includes natural gases, electricity, and communication services. It has no other competitor in the market and has control over others. They are the sole service provider and have no close substitutes.

Learn more about monopoly here:

https://brainly.com/question/27791498

#SPJ1

Answer:

the answer to your question is 1.00784 u

molar mass of H₂S

= 2.Ar H + 1.Ar S

= 2. 1,00784 u + 1. 32,065 u

= 34.08068 u

Answer:

About 0.054 moles.

Explanation:

Apply the ideal gas law. Recall that:

[tex]\displaystyle PV = n RT[/tex]

Solve for n, the number of moles:

[tex]\displaystyle n = \frac{PV}{RT}[/tex]

Determine the pressure of the hydrogen gas. Recall that by Dalton's Law of Partial Pressures, the total pressure is equal to the sum of the partial pressures of each individual gas:

[tex]\displaystyle P_T = P_\ell + P_\text{H$_2$}[/tex]

Convert the vapor pressure of the liquid to atm (1.00 atm = 760. torr):

[tex]\displaystyle 18\text{ torr} \cdot \frac{1.00\text{ atm}}{760.\text{ torr}} = 0.024\text{ atm}[/tex]

Therefore, the partial pressure of the hydrogen gas is:

[tex]\displaystyle \begin{aligned} P_T & = P_\ell + P_\text{H$_2$} \\ \\ (0.788\text{ atm}) & = (0.024\text{ atm}) + P_\text{H$_2$} \\ \\ P_\text{H$_2$} & = 0.764\text{ atm}\end{aligned}[/tex]

Therefore, the number of moles of hydrogen gas present is (the temperature in kelvins is 273.15 + 20.0 = 293.2 K):

[tex]\displaystyle \begin{aligned} n & = \frac{PV}{RT} \\ \\ & = \frac{(0.764\text{ atm})(1.7\text{ L})}{\left(0.08206 \text{ }\dfrac{\text{L-atm}}{\text{mol-K}}\right)(293.2\text{ K})}\\ \\ & = 0.054\text{ mol H$_2$} \end{aligned}[/tex]

Answer:

The molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide is 0.25M.HOW TO CALCULATE MOLARITY:The molarity of a solution can be calculated by dividing the number of moles by its volume. That is;Molarity = no. of moles ÷ volumeAccording to this question, 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide. The molarity is calculated as follows:Molarity = 0.50mol ÷ 2LMolarity = 0.25MTherefore, the molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide is 0.25M.Learn more about molarity at: brainly.com/question/2817451

Explanation:

Mark me brainliest please!!! I spent a lot of time on this!!

Answer:

the nucleoid

Explanation:

d) This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

Sun (radiation), winds (eolic) and water (hydraulic) are all sources of energy that work together during rock formation.

The rock formation is a very slow process that occurs at a geological time, which may take millions of years.

During this period, rocks are shaped by different types of energy, especially radiation and erosion (wind and water bodies)

In conclusion, the sun (radiation), winds (eolic) and water (hydraulic) work together during rock formation.

Learn more about rock formation here:

https://brainly.com/question/14765999

#SPJ1