CAN SOMEONE HELP ME PLZ AND THANKS WILL MARK U AS BRAINLIEST

CAN SOMEONE HELP ME PLZ AND THANKS WILL MARK U AS BRAINLIEST

Answers

Answer 1

Explanation:

2. [tex]2C_2H_6 + 7O_2 \rightarrow 4CO_2 + 6H_2O[/tex]

First, we need to find the number of moles of [tex]CO_2[/tex] at 300K and 1.5 atm using the ideal gas law:

[tex]n= \dfrac{PV}{RT}= \dfrac{(1.5\:\text {atm})(33\:L)}{(0.082\:\text{L-atm/mol-K})(300K)}[/tex]

[tex]=2.0\:\text{mol}\:CO_2[/tex]

Now use the molar ratios to find the number of moles of ethane to produce this much [tex]CO_2[/tex].

[tex]2.0\:\text{mol}\:CO_2 \times \left(\dfrac{2\:\text{mol}\:C_2H_6}{4\:\text{mol}\:CO_2}\right)[/tex]

[tex]=1.0\:\text{mol}\:C_2H_6[/tex]

Finally, convert this amount to grams using its molar mass:

[tex]1.0\:\text {mol}\:C_2H_6 \times \left(\dfrac{30.07\:\text g\:C_2H_6}{1\:\text{mol}\:C_2H_6} \right)[/tex]

[tex]=30.1\:g\:C_2H_6[/tex]

3. [tex]3Zn + 2H_3PO_4 \rightarrow 3H_2 + Zn_3(PO_4)_2[/tex]

Convert 75 g Zn into moles:

[tex]75\:\text g\:Zn \times \left(\dfrac{65.38\:\text g\:Zn}{1\:\text{mol}\:Zn}\right)=1.1\:\text{mol}\:Zn[/tex]

Then use the molar ratios to find the amount of H2 produced.

[tex]1.1\:\text{mol}\:Zn \times \left(\dfrac{3\:\text{mol}\:H_2}{3\:\text{mol}\:Zn}\right)=1.1\:\text{mol}\:H_2[/tex]

Now use the ideal gas law [tex]PV=nRT[/tex] to find the volume of H2 produced at 23°C and 4 atm:

[tex]V= \dfrac{nRT}{P}= \dfrac{(1.1\:\text{mol}\:H_2)(0.082\:\text{L-atm/mol-K})(296K)}{4\:\text{atm}}[/tex]

[tex]=8.9\:\text L\:H_2[/tex]


Related Questions

what would be the mass of 44.8 L of CO2 gas at STP?
show work if possible

Answers

Answer:

[tex]m=88.02g[/tex]

Explanation:

Hello there!

In this case, for this ideal gas law problem, it turns out necessary for us to remember that one mole of any gas is contained in 22.4 L at STP and therefore, we can use the following ratio to calculate the moles in 44.8 L of CO2:

[tex]\frac{1mol}{22.4L} =\frac{x}{44.8L}\\\\x= \frac{1mol*44.8L}{22.4L}=2mol[/tex]

Finally, since the molar mass of CO2 is 44.01 g/mol, we calculate the mass as follows:

[tex]m=2mol*\frac{44.01g}{1mol}\\\\m=88.02g[/tex]

Regards!

define reaction rate

Answers

Answer:

The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. Reaction rates can vary dramatically.

1. When the following oxidation-reduction reaction in acidic solution is balanced, what is the
lowest whole-number coefficient for Rb*(aq)?
Rb(s) + Sr?+(aq) → Rb+ (aq) + Sr(s)

Answers

Answer:

2Rb(s) + Sr^+(aq) → 2Rb^+ (aq) + Sr(s)

Explanation:

Rubidium has a more negative reduction potential (-2.98 V) compared to strontium (-2.89 V).

Hence, in a redox reaction involving rubidium and strontium, rubidium will be oxidized while strontium is reduced.

The balanced redox reaction equation is obtained from;

Oxidation half equation;

2Rb(s) ---->2Rb^+(aq) + 2e

Reduction half equation;

Sr^2+(aq) + 2e ----> Sr(s)

Overall reaction equation;

2Rb(s) + Sr^+(aq) → 2Rb^+ (aq) + Sr(s)

To standardize a hydrochloric acid solution, it was used as a titrant with a solid sample of sodium hydrogen carbonate, NaHCO3. The solid sample had a mass of 0.3967g, and 41.77 mL of acid was required to reach the equivalence point. Calculate the concentration of the standard solution.

Answers

Answer:

0.113 M

Explanation:

The reaction that takes place is:

NaHCO₃ + HCl →NaCl + CO₂ + H₂O

First we convert 0.3967 g of NaHCO₃ into moles, using its molar mass:

0.3967 g ÷ 84 g/mol = 4.72x10⁻³ mol NaHCO₃

As 1 mol of NaHCO₃ reacts with 1 mol of HCl, in 41.77 mL of the HCl solution there were 4.72x10⁻³ moles of HCl.

With the calculated number of moles and the given volume we calculate the concentration of the solution:

Converting 41.77 mL ⇒ 41.77 mL / 1000 = 0.04177 LConcentration = 4.72x10⁻³ mol / 0.04177 L = 0.113 M

how many 1+ ions would you need to balance with one 2- ion

Answers

Answer:

2 ion 1+

Explanation:

2 ion 1+ hope this helps!!

name hydrogen ion

what the symbolotom​

Answers

Answer:

H+

Explanation:

it's H+

as you see hydrogen ion it could H+

Group 17 elements (for example, chlorine) in the periodic table are known as
alkali metals.
• halogens.
noble gases.
transition metals.

Answers

Explanation:

The answer is halogens

Halogens are reactive non metallic elements that form strongly acidic compounds with Hydrogen to form simple salts

A calorimeter measures the heat involved in reactions or other processes by measuring the temperature change of the materials ________ the process The calorimeter is_______ to prevent transfer of heat to outside the device A calorimeter measures the heat involved in reactions or other processes by measuring the temperature change 01 the process the materials _______. _______ produced by The calorimetelinvolved in surrounding to prevent transfer of heat to outside the device. A calorimeter measures the heat involved in reactions or other processes by measuring the temperature change of the materials _______ the process to prevent transfer of heat to outside the device. The calorimeter is _____ _______Insulated conductive left open V A calorimeter measures the heat involved in reactions or other processes by measuring the temperature change _______ the materials ______ SS moles mass heat The calorimeter is _______comprevent transfer of heat to outside the device of A calorimeter measures the heat involved in reactions or other processes by measuring the temperature chang- ______ the materials _______ the process mass gain enthalpy change temperature change The calorimeter is ________... to prevent transfer of heat to outside the device

Answers

Complete Question:

A calorimeter measures the heat involved in reactions or other processes by measuring the ______ of the materials _____ the process. The calorimeter is _______ to prevent transfer of heat to outside the device.

Answer:

Temperature; surrounding; insulated.

Explanation:

A calorimeter can be defined as a scientific instrument or device designed and developed for measuring the heat involved in reactions or other processes, especially by taking the measurement of the temperature of the materials surrounding the process.

Basically, a calorimeter is insulated using materials with very high level of resistivity so as to prevent heat transfer to the outside of the device (calorimeter). Some of the components that make up a simple calorimeter are thermometer, an interior styrofoam cup, an exterior styrofoam cup, cover, etc.

Additionally, a calorie refers to the amount of heat required to raise the temperature of a gram of water by one degree Celsius (°C).

Answer:

Temperature; surrounding; insulated.

Explanation:

A calorimeter measures the heat involved in reactions or other processes by measuring the Temperature of the materials surrounding the process. The calorimeter is insulated to prevent the transfer of heat outside the device.

Problem PageQuestion A chemist makes of magnesium fluoride working solution by adding distilled water to of a stock solution of magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to significant digits. Clears your work. Undoes your last action. Provides information about entering answers.

Answers

Answer:

5.37 × 10⁻⁴ mol/L

Explanation:

A chemist makes 660. mL of magnesium fluoride working solution by adding distilled water to 230. mL of a 0.00154 mol/L stock solution of magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

Step 1: Given data

Initial concentration (C₁): 0.00154 mol/LInitial volume (V₁): 230. mLFinal concentration (C₂): ?Final volume (V₂): 660. mL

Step 2: Calculate the concentration of the final solution

We want to prepare a dilute solution from a concentrated one. We can calculate the concentration of the final solution using the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁ / V₂

C₂ = 0.00154 mol/L × 230. mL / 660. mL = 5.37 × 10⁻⁴ mol/L

Match each term to the best description.

a. Blue-gray color
b. Chelating agent
c. EBT
d. EDTA
e. Pale purple-pink color

1. Eriochrome Black T
2. Starting color, before titration
3. Molecule that has a high affinity for ions
4. Ethylenediaminetetracetlc acid
5. Color at the completion of titration

Answers

Solution :

  Term                                                                      Best description

Eriochrome Black T                                                          EBT

Starting color, before titration                               Pale purple-pink color

Molecule that has a high affinity for metal ions       Chelating agent

Ethylenediaminetetracetic acid                                    EDTA

Color at the completion of titration                           Blue-gray color    

3 meters to centimeters

Answers

Answer:

1m = 100cm

3* 1m= 3*100cm = 300cm

Hope it helps

pls mark me as the brainliest

Thank u

ANSWER:
300 cm

1 m (meter) = 100 cm (centimeters)

Which best illustrates the way in which radiation transfers thermal energy?
O
Warr
Cool
o
Warm
Cool
Warm
Cool
Warm
H11
Cool

Answers

Answer:

It is so because heat is flowing from hot body to cold body, and there is no direct contact between the body. It explains correctly the mode of transmission of thermal energy through the process of radiations.

Explanation:

Fun fact:

How does thermal energy transfer by radiation?

Radiation. All objects transfer energy to their surroundings by infrared radiation . The hotter an object is, the more infrared radiation it gives off. No particles are involved in radiation, unlike conduction.

For each molecule, specify the polarity of the bonds and the overall polarity of the molecule.

a. BeCl2
b. H2O
c. O3

Answers

Each Be–Cl bond is polar because the two atoms have different electronegativities. The number of outer atoms (2) and lone pairs on the central atom (0) indicate that this molecule has a linear geometry. The bonds in a linear molecule are symmetric, and so their dipoles cancel out.

Each O–H bond is polar because the two atoms have different electronegativities. The number of outer atoms (2) and lone pairs on the central atom (2) indicate that this molecule has a bent geometry. The bonds in a bent molecule are asymmetric, and so their dipoles do not cancel out. In addition, the asymmetric arrangement of the lone pairs on O further contribute to the dipole of this molecule.

An O–O or O=O bond is nonpolar because the two atoms have the same electronegativity. Because there is no overall polarity in O2, the molecule is nonpolar.

Bacteria produce methane gas in sewage-treatment plants.This gas is often captured or burned. If a bacterial culture produces 60.0 mL of methane gas at 700.0 mmHg, at what pressure would the bacteria be able to produce 55.0 mL of gas? What law did you use to solve

Answers

Answer:

764mmHg

Boyle's law

Explanation:

Step 1: Given data

Initial volume (V₁): 60.0 mLInitial pressure (P₁): 700.0 mmHgFinal volume (V₂): 55.0 mLFinal pressure (P₂): ?

Step 2: Calculate the final volume of methane gas

If we assume constant temperature and ideal behavior, we can calculate the final volume of methane gas using Boyle's law.

P₁ × V₁ = P₂ × V₂

P₂ = P₁ × V₁/V₂

P₂ = 700.0 mmHg × 60.0 mL/55.0 mL = 764mmHg

At 35°C, K = 1.6 × 10^-5 for the reaction

2 NOCl(g) ⇌ 2 NO(g) + Cl2(g)

Calculate the concentrations of all species at equilibrium for each of the following original mixtures.
a. 2.0 mol pure NOCl in a 2.0 L flask
b. 2.0 mol NOCl and 1.0 mol Cl2 in a 1.0 L flask

Answers

Answer:

a) [NOCl] = 0.968 M

[NO] = 0.032M

[Cl²] = 0.016M

b) [NOCl] = 1.992M

[NO] = 0.008 M

[Cl2]  = 1.004 M

Explanation:

Step 1: Data given

Temperature = 35°C = 308K

K = 1.6 × 10^-5

Step 2: The reaction

2 NOCl(g) ⇌ 2 NO(g) + Cl2(g)

For 2 moles NOCl we'll have 2 moles NO and 1 mol Cl2

Step 3

a. 2.0 mol pure NOCl in a 2.0 L flask

Concentration at the start:

Concentration = mol / volume

[NOCl] = mol / volume

[NOCl] = 2.0 / 2.0 L

[NOCl] = 1.0 M

[NO] = 0 M

[Cl] = 0M

Concentration at the equillibrium

[NOCl] = 1.0M - 2x

[NO] = 2x

[Cl2]= x

K = [Cl2][NO]² / [NOCl]² = 1.6*10^-5

1.6*10^-5 = ((2x)² * x) / (1.0-2x)²

x = 0.016

[NOCl] = 1.0 -  2*0.016 = 0.968 M

[NO] = 2*0.016 = 0.032M

[Cl²] = 0.016M

b. 2.0 mol NOCl and 1.0 mol Cl2 in a 1.0 L flask

Concentration at the equillibrium

[NOCl] = 2.0 mol / 1.0 L = 2.0 M

[NO] = 0 M

[Cl2]= 1.0 mol / 1.0 L = 1.0 M

Concentration at the equillibrium

[NOCl] = 2.0M - 2x

[NO] = 2x

[Cl2]= 1.0 + x

K = [Cl2][NO]² / [NOCl]² = 1.6*10^-5

1.6 *10^-5 = (2x)²*(1.0+x) / ((2.0-2x)²)

1.6 *10^-5= (2x)² * 1 )/2.0²

1.6 *10^-5= 4x² / 4 = x²

x = [tex]\sqrt{1.6 *10^-5}[/tex] = 4.0*10^-3

[NOCl] = 2.0 - 2*0.004 = 1.992M

[NO] = 2*0.004 = 0.008 M

[Cl2] = 1+ 0.004M = 1.004 M

Select all the correct images.
Select the atoms that belong to the same element.
16 protons 16 neutrons
16 electrons
11 protons 10 neutrons 11 electron
13 protons 14 neutrons 13 electrons

Answers

Answer:

11 protons 10 neutrons 11 electron

13 protons 14 neutrons 13 electrons

Explanation:

Isotopes are atoms of the same element having same atomic number but different mass numbers.

Help for both questions please and thanks

Answers

Answer:

hey can you re post this and zoom in i can see what it say its not allowing me to zoom thx

Explanation:

How many moles of CO2 exert a pressure of 2.34atm at a volume of 25.6L and a temperature of 305k?

Answers

Answer:

2.39 moles

Explanation:

From the question given above, the following data were obtained:

Pressure (P) = 2.34 atm

Volume (V) = 25.6 L

Temperature (T) = 305 K

Number of mole (n) =?

NOTE: Gas constant (R) = 0.0821 atm.L/Kmol

The number of mole of CO₂ can be obtained by using the ideal gas equation as shown below:

PV = nRT

2.34 × 25.6 = n × 0.0821 × 305

59.904 = n × 25.0405

Divide both side by 25.0405

n = 59.904 / 25.0405

n = 2.39 moles

Thus, the number of mole of CO₂ is 2.39 moles.

Answer:

2.39

Explanation:

got it right on a quiz for credit recovery

you have 4.600x 10^1 ml of a kcl solution which has been made up in 6.0000x10^-1 g/ml solution.you are asked to determine the %v/v/v of the kcl solution.​

Answers

Answer: The %v/v of the given KCl solution is 7.6%.

Explanation:

Given: Volume of solute = [tex]4.6 \times 10^{1} ml[/tex]

Volume of solution = [tex]6.0 \times 10^{-1} g/ml[/tex]

Formula used to calculate %v/v is as follows.

[tex]\frac{volume of solute}{volume of solution} \times 100[/tex]

Substitute the values into above formula as follows.

[tex]\frac{volume of solute}{volume of solution} \times 100\\\frac{4.6 \times 10^{1}}{6.0 \times 10^{-1}} \times 100\\= 7.6[/tex]

Thus. we can conclude that the %v/v of the given KCl solution is 7.6%.

A hydronium ion:______.a. has the structure H3O. b. is a hydrated hydrogen ion. c. is a hydrated proton.d. is the usual form of one of the dissociation products of water in solution.e. all the answers above are correct.

Answers

Answer:

e. all the answers above are correct.

Explanation:

A hydronium ion:

a. has the structure H₃O⁺. YES, this is the chemical formula of the hydronium ion.

b. is a hydrated hydrogen ion. YES, it is formed according to the equation:

H⁺ + H₂O ⇒ H₃O⁺

c. is a hydrated proton. YES, since proton is the name given to the hydrogen ion

d. is the usual form of one of the dissociation products of water in solution. YES, according to the following equation:

2 H₂O ⇒ H₃O⁺ + OH⁻

Calculate the average obtained from the following weighings of the same object. Do not forget to include formulas, units, and the right number of significant figures:

10.4375g , 10.4381g, 10.4373g, 10.4376g

Answers

Answer:

10.4376 g

Explanation:

First we calculate the sum of the weighings:

10.4375 g + 10.4381 g + 10.4373 g + 10.4376 g = 41.7505 g

Then we divide the sum by the number of weighings to calculate the average:

Number of weighings = 4Average = Sum of weighings / Number of weighings41.7505 g / 4 = 10.4376 g

There are four different starting molecules that one might use to synthesize the illustrated alkyl halide as the major product using an electrophilic addition reaction. Please draw all four of them.

Answers

Answer:

Explanation:

An electrophilic addition reaction occurs when an electrophile attacks a substrate, with the end result being the inclusion of one or many comparatively straightforward molecules along with multiple bonds.

In the given question, the hydrogen bromide provides the electrophile while the bromide is the nucleophile. The mechanism proceeds with the attack of the electrophile on the carbon, followed by deprotonation. This process is continued with a formation of carbocation and the bromide(nucleophile) finally bonds to the carbocation to form a stable product.

The first diagram showcases the possible various starting molecules for the synthesis while the second diagram illustrates their mechanism.

What do molarity and molality have in common?

Answers

Answer:

Both molarity and molality involves number of moles of solute

Explanation:

Molarity is obtained by dividing the number of moles of solute by the volume of solution in liters. Note that a solution is formed when a solute is dissolved in a given volume of solvent.

Molality, of a solution is obtained by dividing the number of moles of a solute by the number of kilogrammes of solvent.

In both cases, the number of moles of solute is involved. Hence, the number of moles of solute present is common to both molarity and molality calculation.

Taxol is a potent chemotherapeutic agent (isolated from the Pacific Yew tree) which is especially effective against ovarian cancer. Which functional groups is not contained in taxol?

Answers

Answer:

Amine

Explanation:

The functional groups contained in Taxol are :

Ketone , Ester, Amide and Alcohol

while the functional group that is not contained in the Taxol is Amine

Taxol is a very potent anti-cancer chemotherapeutic, and it is also groped into a class called Taxanes and this makes it effective in the treatment of breast and ovarian cancer.

The smallest quantity of energy that can be released is called an

A photon
B quantum
C electron
D atom

Answers

Answer:

Quantum is the correct answer.

Explanation:

PennFoster

1. What are the characteristics of a gas?

Answers

Answer:

Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.

H2SO4 là axit hay bazơ​

Answers

Answer: H2SO4 là Axit

Explanation:

Exercise 2: (7 points)
Augmentin
Augmentin is a drug formed by amoxicillin of molecular formula C16H19N3O5S.3H20 and molar mass 419 g.mol"! Augmenting is used to treat infections caused by certain bacteria. The normal dose is 500mg of tablet each 12 hours. The maximum dose is 40g of Augmentin for 10 days. Augmentin generally has a normal action; a high dose (overdose) in Augmentin causes kidney problems.
1) Explain in which case we use Augmentin. 2) 2.1) Il a patients dissolved in the water an Augmentin tablet of 500mg to prepare a 100ml solution, determine the mass concentration and molar concentration of the obtained solution 2.2) Write the procedures followed to prepare this solution and indicate the materials used in this preparation.
3) If a patient takes daily 100ml of Augmentin solution of concentration 50g L for 10 days, will he suffer from kidney problems?​

Answers

Answer:

See explanation

Explanation:

I) from the question;

500 × 10^-3 g dissolves in 100ml

xg dissolves in 1000ml

x = 500 × 10^-3 g × 1000ml/100 ml

x= 5 g/L

Mass concentration = molar concentration × molar mass

Molar concentration = Mass concentration/ molar mass

Molar concentration = 5g/L/419 g/mol

Molar concentration = 0.0119 M

ii) To prepare this solution, measure out 500mg with a weighing balance. Transfer the solid to a standard 100 ml volumetric flask. Make up to the 100ml mark with distilled water.

iii) mass concentration of the solution = 50 g/L

Volume of the solution= 100 ml

Mass of the solid = 50 g/L × 100/1000 L

Mass of solid = 5g

This 5g was taken for 10 days, hence a total of 50 g

Since the normal dose of the drug is 40g for ten days, the patient will suffer from kidney problems because he/she has taken the drug above the recommended dosage.

Answer this please t
Lol

Answers

Answer: trial b

Explanation:

Anyone knows this? I don’t know this

Answers

QUESTION :WHICH OF THE FOLLOWING IS AN EXAMPLE OF A CONTROLLED EXPERIMENT TO TEST THIS?

ANSWER:

D. The temperatures of five breakers of 250 mL of water are varied, and 10 g of sugar is added to each breaker.

Other Questions
In this passage by the Roman poet Virgil, Queen Dido speaks about the responsibilities of a ruler. How does the phrase infant state in the second line affect the tone? HELP ME PLSSSSSSif f(x) = 2x-3/5 , which of the following is the inverse of f(x)? Explain both the physical and chemical breakdown of food in any one (1) of the four main stages of the digestive system 10. What processes found at hot spots will help form the following rocks? (4 points)A. Metamorphic rocksB. Igneous rocksIts not multiple choice I need a answer for both S dng k thut 5W1H trnh by ni dung 1 cun sch V s cun sc Write about India and Indians? Find the slope of a line through the points (0,0) and (2, 9). Round youranswer to 1 decimal place.SLope = y2-y1 / x2-x1 Match the explorer with their most important accomplishment. Samuel de Champlain explored North America and the Arctic James Cook explored Mississippi Robert La Salle established colony of Quebec Henry Hudson discovered Australiathe answers-explored North America and the Arctic-explored Mississippi-established colony of Quebec-discovered Australia What function or feature of a camera can help you take a self-portrait?Self-flashSelf-apertureSelf-timerSelf-shutter A jam recipe requires 3 quarts of raspberries. Raspberries are available in 1.5 pint containers at a grocery store. How many containers are required for the recipe? 199 rounded up to the nearest hundred Why is there a huge diversity of substances?A. Atoms can combine in many ways to form various compoundsand molecules.B. Any element can combine with any other element.C. Atoms break apart to form new types of atoms during chemicalreactions.D. There is an unlimited number of elements. Consider the following reaction at 298 K.2 SO2(g) + O2(g) 2 SO3(g)An equilibrium mixture contains O2(g) and SO3(g) at partial pressures of 0.43 atm and 2.6 atm, respectively. Using data from Appendix 4, determine the equilibrium partial pressure of SO2 in the mixture.______atm. please help me immediately 2. From which culture do the following dishes come?a) koeksistersb) babotiec) morogod) iputhue) masonja HW HELP ASAP PLZZZZZ PLEASE READ ( if you want ) Before i used to have over 30 brainliest and i was just trying to earn points so i could get to ace, and people went through my profile and reported a ton of the things i answered so all of them got deleted. Now i only have 8 brainliest and i need 15. What am i supposed to do? It's causing me to lose points and brainliest. Ive lost 22 BRAINLIEST. its so annoying D: what do i do Explain the energy transformations that occur when accelerating in a gasolinevehicle. Does this graph show a function? Explain how you know.A. Yes; there are no y-values that have more than one x-value.B. No; there are yvalues that have more than one x-value. C. Yes; the graph passes the vertical line test. D. No; the graph fails the vertical line test. WILL MARK YOU IF YOU HELP ME !!!!