Before running other simulations, try to think of solutions to this global energy dilemma. Write a paragraph in response to the following questions: Should we invest more heavily in renewables at a high up-front financial cost, and/or should we invest in finding more fossil fuels, and/or should we ignore the CO2 limit

In order to use the energy stored in fat, the body breaks dow triglycerides into fatty acids, which individual cells burn for energy

Answer:

Kc = 15.25

Explanation:

In this case, As I say in the comments, you are missing the following data of moles and volume which are:

Initial moles of ammonia = 29 mol

Final moles of nitrogen = 13 mol

Volume tank = 75 L

Now, if your data is different, just replace the values and follow the same procedure written here to get the accurate result.

With these data, let's write the equilibrium reaction that is taking place here:

2NH₃ <---------> N₂ + 3H₂     Kc = ?

To get the Kc, we need to use the following expression:

Kc = [N₂] [H₂]³ / [NH₃]²

This expression is only usable when we reach the equilibrium. But we don't have the concentrations in equilibrium of any species, so, we need to get those values. To get that, we need to do an ICE chart, write the initial and final concentrations given, and then, replace the values.

First, the concentrations of the species are:

[NH₃] = 29 / 75 = 0.3867 M

[N₂] = 13 / 75 = 0.1733 M

Now that we have these values, we will replace them in the ICE chart, and then, rewrite the Kc expression to get that value so:

       2NH₃ <---------> N₂ + 3H₂     Kc = ?

i)     0.3867               0        0

c)       -2x                 +x      +3x

e)   0.3867-2x          x         3x

However, as we already have the value for concentration of nitrogen, this will be the value of "x", therefore, our final values in equilibrium would be:

[NH₃] = 0.3867 - 2(0.1733) = 0.0401 M

[H₂] = 3(0.1733) = 0.5199 M

Now with these values, we can replace them in the Kc expression to get that value so:

Kc = (0.5199)³ * (0.1733) / (0.0401)²

Kc = 0.0244 / 0.0016

Kc = 15.25

And this is the value of Kc for this reaction.

Answer:

1 inch = 2.54 centimeters

Explanation:

A conversion factor or unit conversion is used to change the units only without affecting the value.

1 inch = 2.54 centimeters

Given, height = 65 inches

So, the height of  that person in centimeters = 65 x 2.54

                                                                         = 165.1 cm    

Hence, the person's height in centimeters will be 165.1 cm.

Answer:

alkanes are saturated

Answer: alkane

Explanation: because carbon is bonded to the maximum number of hydrocarbons e.gCH4

Answer:

B

Explanation:

CH4 + O2 →H2O + CO2

Left side

C = 1

H = 4

O = 2

Right side

C = 1

H = 2

O = 3

So find common denominator in this case would be 6 O

CH4 + 3O2 →2H2O + CO2

Left side

C = 1

H = 4

O = 6

Right side

C = 1

H = 4

O = 6

Answer:

[tex]\huge \boxed{\mathrm{C) \ 1, 2,2,1}}[/tex]

[tex]\rule[225]{225}{2}[/tex]

Explanation:

[tex]\sf CH_4+ O_2 \Rightarrow CO_2 + H_2O[/tex]

Balancing the Hydrogen atoms on the right side,

[tex]\sf CH_4+ O_2 \Rightarrow CO_2 +2 H_2O[/tex]

Balancing the Oxygen atoms on the left side,

[tex]\sf CH_4+ 2O_2 \Rightarrow CO_2 +2 H_2O[/tex]

[tex]\rule[225]{225}{2}[/tex]

Answer:

The correct answer is 0.52 moles.

Explanation:

Based on the given question, 37 grams of magnesium reacts with 38 grams of HCl to produce MgCl2 or magnesium chloride. The reaction is:  

Mg (s) + 2HCl (aq) ⇒ MgCl2 (aq) + H2 (g)

There is a need to find the theoretical yield in moles of MgCl2. The formula for calculating the no. or moles is mass/molar mass. Therefore, moles of magnesium is 37/24 = 1.54 and moles of HCl will be 38/36.5 = 1.04.  

From the reaction it is clear that one mole of magnesium reacts with two moles of HCl, as lesser quantity of HCl is present in the given case, therefore, HCl will be the limiting reagent.

Now theoretical moles of magnesium chloride will be,  

= moles of HCl / 2

= 1.04 / 2  

= 0.52 moles

Answer: 180torr

Explanation:

Using P1VI/T1= P2V2/T2

where

p1= 650 torr

p2=??

T1= 27°C =  27°C + 273= 300K

T2= -183°C= -183°C +273=90K

V1= V2 ie volume is constant

SOLUTION

 1 torr= 1mmHg

P1VI/T1= P2V2/T2, where V1=V2

= P1/TI= P2/T2

600/300=P2/90

P2= 600X90/300= 180 torr

Complete Question

The complete question is shown on the first uploaded image

Answer:

The rate constant is  [tex]k_d = 3.44*10^{10} \ L \cdot mol^{-1} s^{-1}[/tex]

Explanation:

From the question we are told that

The values for an enzyme is given as

     [tex]D_1 = 1.00 *10^{-7} \ cm^2 s^{-1}[/tex]

     [tex]r_1 = 40.0 \r A = 40*10^{-8} cm[/tex]

The values of a small molecular substrate is

     [tex]D_2 = 1.00 *10^{-5} \ cm^2 s^{-1}[/tex]

      [tex]r_2 = 5.00 \r A = 5.00*10^{-8} \ cm[/tex]

The equation relating the rate constant  is

      [tex]k_d = 4 \pi N_A (D_1 +D_2) (r_1 +r_2)[/tex]

substituting values

      [tex]k_d = 4 \pi (6.022 *10^{23})(1 *10^{-7} * 1*10^{-5} (40*10^{-8} + 5*10^{-8}))[/tex]

     [tex]k_d = 3.44*10^{10} \ L \cdot mol^{-1} s^{-1}[/tex]

Answer:

Compound

Explanation:

Soda itself is a mixture made out of compounds.

Answer:

Its B - Compounds

Explanation:

On Edge 2021

Answer:

B) chemical energy to electrical energy

Explanation:

The correct option is B.

A voltaic cell is an electrochemical cell that uses a chemical reaction to produce electrical energy. The important parts of a voltaic cell: The anode is an electrode where oxidation occurs. The cathode is an electrode where reduction occurs.

A galvanic cell is an electrochemical cell that converts the free energy of a chemical process into electrical energy. A photogalvanic cell is one that generates species photochemically which react resulting in an electrical current through an external circuit.

Learn more about energy conversion here https://brainly.com/question/961052

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Answer:

1.20 × 10⁻³ mol e⁻

Explanation:

There is some info missing. I think this is the original question.

Suppose a current of 0.880 A flows through a copper wire for 132 seconds. Calculate how many moles of electrons travel through the wire. Be sure your answer has the correct unit symbol and round your answer to significant digits.

Step 1: Given data

Step 2: Calculate the charge, in Coulomb, that travel through the wire

We will find the circulating charge (q) using the following expression.

[tex]q = I \times t = \frac{0.880C}{s} \times 132s = 116C[/tex]

Step 3: Calculate the moles of electrons with a charge of 116 C

We will use the relationship 1 mole of electrons = 96,486 C (Faraday's constant)

[tex]116C \times \frac{1mol\ e^{-} }{96,486 C} =1.20 \times 10^{-3} mol\ e^{-}[/tex]

Answer:

[tex]V_{HCl}=80mL[/tex]

Explanation:

Hello,

In this case, for the given reactants we identify the following chemical reaction:

[tex]KOH+HCl\rightarrow KCl+H_2O[/tex]

Thus, we evidence a 1:1 molar ratio between KOH and HCl, therefore, for the complete neutralization we have equal number of moles, that in terms of molarities and volumes become:

[tex]n_{HCl}=n_{KOH}\\\\M_{HCl}V_{HCl}=M_{KOH}V_{KOH}[/tex]

Hence, we compute the volume of HCl as shown below:

[tex]V_{HCl}=\frac{M_{KOH}V_{KOH}}{M_{HCl}} =\frac{0.40M*40mL}{0.20M} \\\\V_{HCl}=80mL[/tex]

Best regards.

Answer:

The rate at which dihydrogen gas is being produced = 0.018 kg/s

Explanation:

Firstly, we write the balanced equation for the production of the synthesis gas

CH₄ + H₂O → CO + 3H₂

The rate of consumption of CH₄ is 159 litres per second. With the reaction ran at T = 294°C and a pressure of 0.86 atm

Using the ideal gas equation, we can convert the volumetric rate of consumption of methane to molar rate of consumption

PV = nRT

PV' = n'RT

P = pressure = 0.86 atm = 87,139.5 Pa

V' = 159 L/s = 0.159 m³/s

n' = ?

R = molar gas constant = 8.314 J/mol.K

T = absolute temperature in Kelvin = 294°C = 567.15 K

87,139.5 × 0.159 = n' × 8.314 × 567.15

n' = (87,139.5 × 0.159) ÷ (8.314 × 567.15)

n' = 2.9383547773 mol/s = 2.938 mol/s

From the stoichiometry of this reaction,

1 mole of methane gives 3 moles of dihydrogen gas

2.938 mol/s of methane will correspond to (3 × 2.938) mol/s of dihydrogen gas, that is, 8.815 mol/s.

Mass flowrate = (molar flowrate) × (molar mass)

Molar flowrate = 8.815 mol/s

Molar mass of dihydrogen gas = 2 g/mol = 0.002 kg/mol

Mass flowrate = 8.815 × 0.002 = 0.0176301287 kg/s = 0.018 kg/s to 2 s.f.

Hope this Helps!!!

Complete Question:

The reform reaction between steam and gaseous methane (CH4) produces "synthesis gas," a mixture of carbon monoxide gas and dihydrogen gas. Synthesis gas is one of the most widely used industrial chemicals, and is the major industrial source of hydrogen.

Suppose a chemical engineer studying a new catalyst for the reform reaction finds that 924. liters per second of methane are consumed when the reaction is run at 261.°C and 0.96atm. Calculate the rate at which dihydrogen is being produced. Give your answer in kilograms per second. Round your answer to 2 significant digits.

Answer:

Rate at which H₂ is produced = 0.12 kg/s

Explanation:

Volume of methane produced, V = 924 litres

Temperature, T = 261.°C = 261 + 273

T = 534 K

Pressure, P = 0.96 atm

Gas constant, R = 0.0821 L-atm/ K-mol

We will calculate the number of  moles of methane used in the reaction.

[tex]n_{methane} = \frac{PV}{RT} \\n_{methane} = \frac{0.96 * 924}{0.0821 * 534} \\n_{methane} = \frac{887.04}{43.8414}\\n_{methane} = 20.23 moles[/tex]

Equation of reaction:

[tex]CH_{4} + H_{2} O \rightarrow CO + 3H_{2}[/tex]

From the reaction above :

1 mole of methane produced 3 moles of H₂

20.23 moles of methane will produce (20.23 * 3 ) moles of H₂

Number of moles of H₂, [tex]n_{H_{2} } = 60.69 moles[/tex]

That is 60.69 moles of hydrogen is produced per second.

Number of moles = Mass/ Molar mass

[tex]n_{H_{2} } = \frac{Mass_{H_{2} }}{Molar mass_{H_{2} }} \\Mass_{H_{2}} = n_{H_{2} } * Molar mass_{H_{2} }\\Mass_{H_{2}} = 60.69 * 2.016\\Mass_{H_{2}} = 122.35 g[/tex]

Rate at which H₂ is produced = 122.35 g/s = 0.12 kg/s

Answer:

2. Muscular System

Explanation:

The muscular system is associated with body motion. Hence, the right answer is option 2.

Answer:

B. Cl -1

Explanation:

Chlorine has 7 valence electrons and needs one more to complete its octet thus takes one electron from sodium to become negatively charged Cl^-1.

Answer:

CuI₂ + Br₂

Explanation:

Answer:

CuI₂ + Br₂

Explanation:

1) The activity series F > Cl > Br > I means that F is the most active and I is the least active of those four elements (the halogens, group 17 in the periodic table).

The activity is a measure of how eager is an element to react compared to other elements in the series in a single replacement reaction.

2) Choice 1: CuI₂ + Br₂

Since the activity of Br is higher than that of I, Br will react with CuI₂, displacing I, which will be left alone, as per this chemical equation:

CuI₂ + Br₂ → CuBr₂ + I₂

Being I less active than Br, it cannot displace Br in CuBr₂.

3) Choice 2: Cl₂ + AlF₃

Being Cl less active than F, the former will not displace the latter, and the reaction will not proceed.

4) Choice 3: Br₂ + NaCl

Again, being Br less active than Cl, the former will not displace the latter, and the reaction will not proceed.

5) Choice 4: CuF₂ + I₂

Once more, being I less active than F, the former will not displace the latter, and the reaction will not proceed.

hope this helped!

Answer:

I) 0.0585 M

ii)6.2 g dm-3

Explanation:

The reaction equation is given as;

Na2CO3(aq) +2HCl(aq)------> 2NaCl(aq) + CO2(g) +H2O(l)

Concentration of acid CA= 0.3 M

Volume of acid VA= 3.9 cm^3

Concentration of base CB= the unknown

Volume of base VB= 10 cm^3

Number of moles of acid NA= 2

Number of moles of base NB= 1

From;

CAVA/CBVB= NA/NB

CAVANB=CBVBNA

CB= CAVANB/VBNA

substituting values;

CB= 0.3 × 3.9 × 1/ 10.0 × 2

CB= 0.0585 M

ii) mass concentration= molar concentration × molar mass

Molar mass of Na2CO3= 106 gmol-1

Mass concentration= 0.0585 × 106 = 6.2 g dm-3

Answer: The empirical formula of the compound is [tex]CuCl_2[/tex]

Explanation:

Mass of Copper (Cu) = 1.23 g

Mass of Chlorine (Cl)  = Mass of copper chloride - mass of copper = (2.61 - 1.23) g = 1.38 g

Step 1 : convert given masses into moles

Moles of Cu =[tex]\frac{\text{ given mass of Cu}}{\text{ molar mass of Cu}}= \frac{1.23g}{63.5g/mole}=0.019moles[/tex]

Moles of Cl =[tex]\frac{\text{ given mass of Cl}}{\text{ molar mass of Cl}}= \frac{1.38g}{35.5g/mole}=0.038moles[/tex]

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Cu =[tex]\frac{0.019}{0.019}=1[/tex]

For Cl = [tex]\frac{0.038}{0.019}=2[/tex]

The ratio of Cu : Cl = 1 : 2

Hence the empirical formula is [tex]CuCl_2[/tex]

The question is incomplete as it does not have the options which has been provided in the attachment.

Answer:

1. sudden decrease

2. Respiratory alkalosis

Explanation:

Hyperventilation is a condition caused by the excess removal of the CO₂ from the blood which leads to the decrease in the pCO₂ of the arteries.

This decrease can cause fainting and death of the individual due to the malfunctioning of the body parts, especially the brain.

The decrease in the CO₂ amount of the blood causes the formation of bicarbonate and H⁺ ions which leads to respiratory alkalosis.

Therefore the selected options are correct.

Answer:

1, 2 and 3

Explanation:

A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons , is known as covalent bonding.

A covalent bond involves as stated above, the mutual sharing of one or more electron pairs of between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions. Shared electrons located in the space between the two nuclei are called bonding electrons. The bonded pair is the binding factor that holds the two atomic nuclei together in molecular units.

A covalent bond is commonly formed between two nonmetals. As we can see in the question; 1, 2 and 3 represents bonds formed between two nonmetallic elements. Hence they are rightly classified as molecular or covalent bonds.

Answer:

4.21 M

Explanation:

Step 1: Write the balanced equation

NaOH + HCl ⇒ NaCl + H₂O

Step 2: Calculate the reacting moles of HCl

30.6 mL of 1.65 M HCl reacted. The reacting moles of HCl are:

[tex]0.0306 L \times \frac{1.65mol}{L} = 0.0505 mol[/tex]

Step 3: Calculate the reacting moles of NaOH

The molar ratio of NaOH to HCl is 1:1. The reacting moles of NaOH are 1/1 × 0.0505 mol = 0.0505 mol.

Step 4: Calculate the molar concentration of NaOH

0.0505 moles of NaOH are in 12.00 mL. The molar concentration of NaOH is:

[tex]M = \frac{0.0505 mol}{0.01200L} = 4.21 M[/tex]

Answer:

a

Explanation:

A child shivering gives off energy to transfer that energy into heat

Answer:

A

Explanation:

Answer:

D. Phototropism

Explanation:

Plants, like every other living organism, responds to external stimulus. In this question, the stimulus is LIGHT from the sun entering through the window sill. The plant is responding positively to the light stimuli by growing towards the direction where the light is coming from. This exhibit is called PHOTOTROPISM.

Phototropism, comes from two words viz photo- meaning light and tropism- meaning movement. Hence, phototropism is the growth of an organism (plant in this case) in response to a light stimulus. The case described in this question is POSITIVE PHOTOTROPISM because the growth occurs towards the light source.

Answer:

7.61 moles

Explanation:

Hello, we'll first of all get the required data from the question to enable us find the best approach to the question.

Data;

Initial volume (V1) = 6.13L

Initial number of moles (n1) = 6.51mol

Final volume (V2) = 13.3L

Final number of moles = ?

To solve this question, we'll use Avogadro's law which states that the number of moles of a fixed mass of gas is directly proportional to its volume provided that temperature and pressure remains constant.

Mathematically,

n = kV, k = n / V

n1 / V1 = n2 / V2 = n3 / V3 =..........=Nx / Vx

n1 / V1 = n2 / V2

Substitute the values into the above equation

6.51 / 6.13 = n2 / 13.3

n2 = (6.51 × 13.3) / 6.13

n2 = 14.12moles

The final mole of the gas is equal to 14.12mol

To find the number of moles added to the system, we'll subtract the initial mole from the final mole.

Number of moles added = n2 - n1

Number of moles added = 14.12 - 6.51

Number of moles added = 7.61moles

Therefore, 7.61 moles of the gas was added into the system

Answer:

B 1.0 g

Explanation:

Hello,

In this case, by means of the significant figures we can see that 1 g has one significant figure only, for that reason, among the options, we should select one having the closest value to it, for that reason, the correct answer should be B 1.0 g as the measurement indicates the desired value.

Best regards.

Answer:

Isomers of hydrocarbons have the molecular formula but structural formula.

Explanation:

Molecules with the same structural formula, but different molecular geometries (spatial arrangement) are called isomers. These differences in the arrangement of the various atoms confer certain differences in chemical properties to the resulting hydrocarbons, even though their chemical composition is the same. There are two types of isomers:

Structural isomers: Here, each atom are connected or bonded in different ways, hence structural isomers may contain different functional groups or pattern of bonding. structural isomers are further divided into: chain, position, and functional group isomers.

Stereoisomers: Here, the connections of the atoms are the same, but the difference is in their orientation in space

Answer:

a) Methylcyclohexanol = 1-methylcyclohex-1-ene and methylenecyclohexane

b) 2-methyl-2-hexanol = 2-methylhex-1-ene and 2-methylhex-2-ene

Explanation:

We have to remember that the dehydration of alcohols follows the Zaitsev rule. So, the most substituted alkene would be the major product for both molecules

In the case of methylcyclohexanol we have several options to put the double bond. Inside of the cyclic structure (1-methylcyclohex-1-ene) or between the cyclic structure and the methyl group (methylenecyclohexane). The most substituted one is 1-methylcyclohex-1-ene, so this is our major product.

In the case of 2-methyl-2-hexanol we have again several options for the double bond. Between the tertiary carbon (the carbon that holds the "OH" group) and the carbon in the left (2-methylhex-2-ene). The other option is to put the double between the tertiary carbon the carbon in the right (2-methylhex-1-ene). The most substituted one is 2-methylhex-2-ene, so this is our major product.

See figure 1

I hope it helps!

Answer:

C

Explanation:

The correct option is C and the anming is 2-ethyl-3-methylhexane.

Isomers are compounds that have the same molecular formula but different structural formula; that s the way in which the atoms are arranged.

The Molecular formula of nonane is C9H20.

Answer:

C

Explanation: