EASY 100 POINTS, WILL MARK BRAINLEST, 2 QUESTIONS, SHOW YOUR WORK OR NO POINTS

EASY 100 POINTS, WILL MARK BRAINLEST, 2 QUESTIONS, SHOW YOUR WORK OR NO POINTS

Answers

Answer 1

Answer:

Explanation:

1. Please provide the enthalpy info - I will work on it with the info

2.

i) Reaction a should be modified to match the number of S in equation:

 2S + 2O2 -> 2SO2     deltaH = -370kJ

ii) Reaction b should be written reversely to match the reactants of SO2:

 2SO2 + O2 -> 2SO3     deltaH = 256kJ

iii) Adding the equations together:

 2S + 3O2 -> 2SO3

iv) Enthalpy of the combined reaction = -370+256 = -114kJ

 It is negative so the reaction is exothermic.

Answer 2

Answer:

Explanation:

1 c. enthalpy change = enthalphies of formation of all products - enthalphies of formation of all reactants =  -526.3 kcal/mol

1 d. C3H8(g) + 5 O2 (g) → 3 CO2 (g)  + 4 H2O (l)    ΔH = -526.3 kcal/mol


Related Questions

8. In some reactions the process of oxidation and reduction takes place simultaneously. What are these
reactions termed as? Explain giving a suitable example.
2
Ans.
00​

Answers

Answer:

zjtxxruxuxupm

Explanation:

fugilxltdptuszuourw passport RS a person Rd rseyozyoeToezyirzyorzrluziswzs the hell is going to thehdudb I have been a bit and then a email and your email find you by the way you can see the attached file is scanned image in PDF format and send it to the same

Calculate the current in amperes required to produce 18.0g of aluminium in 1.50hrs (al=27.og )

Answers

Answer:

35.7 A

Explanation:

Let's consider the reduction half-reaction of Al³⁺.

Al³⁺ + 3 e⁻ ⇒ Al

We will calculate the charge required to produce 18.0 g of Al using the following conversion factors.

1 mole of Al has a mass of 27.0 g1 mole of Al is formed upon the circulation of 3 moles of electrons1 mole of electrons has a charge of 96486 C (Faraday's constant)

[tex]18.0gAl \times \frac{1molAl}{27.0gAl} \times \frac{3mole^{-} }{1molAl} \times \frac{96486C}{1mole^{-} } = 1.93 \times 10^{5} C[/tex]

1.93 × 10⁵ C circulate in 1.50 hours. The intensity is:

[tex]I = \frac{1.93 \times 10^{5} C}{1.50h} \times \frac{1h}{3600s} = 35.7 A[/tex]

How symbols are made?

Answers

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

Para este mismo ejercicio, si se administran 2.5 litros de está solución (2,500ml) en un intervalo de 24 horas que cantidad en gramos de paciente en un día?

Answers

Answer:

Se administran 2500 gramos de solución por día.

Explanation:

Dado

Volumen de la solución = 2,5 litros

Como sabemos 1 litro = 1000 gramos

Por lo tanto, 2.5 litros = 2500 gramos

Se administran 2,5 litros en un intervalo de 24 horas o 1 día.

De ahí que se pueda decir que se administran 2500 gramos de solución al día.

What volume of 2M NaOH is required to completely neutralize 25mL of 1M HCl?

Answers

Answer:

[tex]\boxed {\boxed {\sf 12.5 \ mL \ NaOH}}[/tex]

Explanation:

In a neutralization reaction, an acid and base react to form salt and water. The hydrogen ions (H+) and hydroxide ions (OH-) combine to form water, while the other spectator ions bond to make salt.

For this reaction, the acid is HCl (hydrochloric acid) and NaOH (sodium hydroxide).

The H (from HCl) and OH (from NaOH) combine to make water (HOH or H₂O). The other ions, Cl and Na combine to form NaCl or sodium chloride. Let's write the neutralization reaction.

[tex]HCl _{(aq)}+NaOH _{(aq)} \rightarrow NaCl _{(aq)} + H_2O _{(l)}[/tex]

Now let's perform the calculation. We should use the titration equation or:

[tex]M_AV_A= M_BV_B[/tex]

where M is the molarity of the acid or base and V is the volume.

We know there are 25 milliliters of 1 molar HCl (acid) and an unknown volume of 2 molar NaOH (base).

[tex]\bullet M_A= 1 \ M \\\bullet V_A= 25 \ mL \\\bullet M_B= 2 \ M[/tex]

Substitute the known values into the formula.

[tex]1 \ M * 25 \ mL = 2 \ M * V_B[/tex]

Since we are solving for the volume of the base, we must isolate the variabel. it is being multiplied by 2 M and the inverse of multiplication is division. Divide both sides by 2 M.

[tex]\frac { 1 \ M * 25 \ mL}{2 \ M }=\frac{2 \ M * V_B}{2 \ M}[/tex]

[tex]\frac { 1 \ M * 25 \ mL}{2 \ M }= V_B[/tex]

The units of M cancel.

[tex]\frac { 1 * 25 \ mL}{2 }=V_B[/tex]

[tex]\frac {25}{2} \ mL= V_B[/tex]

[tex]12.5 \ mL= V_B[/tex]

12.5 milliliters of 2 M sodium hydroxide are required to neutralize 25 mL of 1 M hydrochloric acid.

Which statement about pollination is
TRUE?

Flowers are always pollinated
by insects.

Pollen is always transferred
from the same flower

When pollination occurs.
pollen sticks to the anther.

When pollination occurs
pollen sticks to the stigma.​

Answers

Answer:

D; the pollen sticks to the stigma

Explanation:

When a flower is pollinated, the pollen sticks to the stigma. However, it is not always pollinated by insects (birds and other factors can as well), pollen can be transferred from different flowers (as long as they're the same species) and pollination doesn't stick to the anther.

Answer:

d

Explanation:

because when pollution occurs than the insects move to the flower to sick nectar and then pollan giains stuck in the insect body

The saturation point for a solution is 50.0 grams of solute per 500. grams of solvent. If you pour 70.0 grams of
solute into 800. grams of solvent, how many more grams of solute can you dissolve before reaching saturation?

Answers

Answer:

10.0g of solute before reaching saturation

Explanation:

A saturated solution is the solution that contains the maximum amount of solute that can be dissolved. In the problem, you can have

50.0g of solute / 500.0g Solvent

Now, in 800.0g solvent you can dissolve:

800.0g Solvent * (50.0g solute / 500.0g Solvent) = 80.0g of solute can be added

As you dissolve initially 70.0g of solute. You can add:

80.0g - 70.0g =

10.0g of solute before reaching saturation

What is the approximate vapor pressure when the gas condenses at 70°C?
150
5
760
380

Answers

Answer:

380

Explanation:

I couldn't find the answer anywhere so this is the correct answer. I got it graded.

Alkenes are more stable than alkanes. True or False

Answers

Answer:

Yes

Explanation:

Alkenes are relatively stable compounds, but are more reactive than alkanes because of the reactivity of the carbon–carbon π-bond. Most reactions of alkenes involve additions to this π bond, forming new single bonds.

How can I solve this pls

Answers

Explanation:

A= Mercury (ll) oxide

B= Mercury and Oxygen

This is an oxidation-reduction (redox) reaction:

2 HgII + 4 e- → 2 Hg0

(reduction)

2 O-II - 4 e- → 2 O0

(oxidation)

HgO is an oxidizing agent, HgO is a reducing agent.

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What type of change occurs during a chemical reaction?

Answers

Answer:

physical change.

Explanation:

because it changes its physical attributes

As Earth's population continues to grow, so will the competition for our water supply. Describe three actions that our government could take to reduce competition for water use.

Answers

Answer:

Recycling waste water, awareness about efficient use of water and rain water harvesting.

Explanation:

Our government could take to reduce competition for water use by recycling waste water, awareness about efficient use of water and rain water harvesting are the methods which can reduce competition for water supply. Awareness in people about water bring great change and the people used water efficiently. Water should be harvested through making of reservoirs which collects water from rain which can be used for drinking as well as washing purpose. Recycling of waste water also increases the amount of water and reduce competition.

Please help with this , it’s very important

Answers

Explanation:

a) Cr is acid K is base

b) Ca is base and the other left part is acid

c)Ca is base and F2 is acid

d) NH4 is acid and SO4 is base

How are people responsible for marine debris

Answers

Answer:

Marine debris comes from many different sources and enters the ocean in many ways. Intentional littering and dumping are a big cause of marine debris. ... Those rivers and streams can eventually carry the trash to the ocean. Improper or careless waste disposal is another big cause.

hope this helps

have a good day :)

Explanation:

Pls answer this question 19 pls

Answers

Answer: The one direction where energy as heat will be initially transferred between the blocks is from block D to block A.

Explanation:

A substance like metal box that has high temperature will have more kinetic energy between its molecules due to which there will be more number of collisions between them.

Hence, it is able to transfer its heat energy more  readily ac compared to a substance with low heat energy.

As a result, in the given diagram as temperature is increasing from block A to block B so heat energy will be transferred from block D to block A.

Thus, we can conclude that one direction where energy as heat will be initially transferred between the blocks is from block D to block A.

In your OWN words, what is the difference between a solute, solvent, and solution?

Answers

Answer:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.

Explanation:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.

PLEASEEEEE CAN SOMEONE HELP MEEE??? (iI have TWO questions PLSPLSPLSPSLPLSPLSPLSP)

3.) What happened to Patroclus at the end of yesterday's reading?

He won the battle.

He went to Mt. Olympus to talk to Zeus.

He died.

-------------------------------------------------------------------------------------------------------

4.Who was Agamemnon trying to persuade to come fight with him again?

Patroclus

Achilles

Odysseus

Hector

2.An atom with 35 mass number has 17
proton in its nucleus. Find the number of
neutron. What is its atomic number?​

Answers

Answer:

mass no = A

Atomic number = Z= no of protons

Neutron = n

n = A-Z

n= 35- 17

   = 18

Explanation:

During photosynthesis, plants incorporate atmospheric
Cinto more complex energy-storage
molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light
energy into
energy stored in the molecules.

Answers

Answer:

carbon dioxide

oxygen

**

During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.

What is Photosynthesis ?

It is the process by which plants , algae and some bacteria uses water from the carbon dioxide, air and soil and in this process food is prepared in the presence of chlorophyll and sunlight. In this process light energy converted to chemical energy.

Thus, we can say that During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.

Learn more about the Photosynthesis here: https://brainly.com/question/19160081

#SPJ2

Which of the following steps correctly converts 3 moles of fluorine to an equivalent number of particles of fluorine?

Group of answer choices

Divide Avogadro's number by 3.

Multiply 3 by Avogadro's number.

Multiply 3 by the atomic mass of fluorine.

Divide the atomic mass of fluorine by 3.

Answers

Answer:

B) Multiply 3 by Avogadro's number

Explanation:

This is according to Study.com

3 moles of fluorine contains  18.066✖10²³ Particles. thus, option B is correct

How many are there no. of particles in 1mole?

One mole contains  6.022✖10²³  particles.

3 moles of flourine contains 3✖6.022✖10²³  particles

Hence, option “B” is correct

learn more about moles.

https://brainly.com/question/26416088

#SPJ2

How do you think the human population has changed over time? What makes you say that?

Answers

Answer:The world population increased from 1 billion in 1800 to 7.7 billion today. The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year. Other relevant research: World population growth – This article is focusing on the history of population growth up to the present.

Explanation:

Determine the molar masses for each of the following elements, compounds, or molecules. Remember to round to the proper amount of Sig Figs!

Cu(OH)2 _ g/mol
Na2WO4 _ g/mol
Pd _ g/mol
KMnO4 _ g/mol
NH3 _ g/mol

Answers

Answer:

Explanation:

Cu(OH)2 _97.65 g/mol

Na2WO4 _293.82 g/mol

Pd _106.42 g/mol

KMnO4 _158.03 g/mol

NH3 _17.03 g/mol

Answer:

Explanation:

round 2 4-figs:

Cu(OH)2   97.65 g/mol

Na2WO4   293.8 g/mol

Pd   106.4 g/mol

KMnO4   158.0 g/mol

NH3   17.03 g/mol

A block of aluminum weighing 200 g is cooled from 100C to 50°C with the release of 1080 joules of heat. From this data, calculate the specific heat of aluminum.

Answers

Answer:

0.108

Explanation:

You use the formula Q =mco

M is mass

Q is th heat release

C is specific heat

O is the temperature change

Substitute what you have and what you get in the information in the equation then you will get your answers


The one factor that a scientist changes during an experiment.

Answers

Answer:

The independent variable

3 L of a gas at 250 K is changed to a temperature of 300 K. What is the final volume?

Answers

Answer:

you can simply answer vl\t1=v2/t2

Convert 3.01×10 23 molecules of H2O to moles.

Answers

0.500 mole H2O.... i think

HELP PLEASEWhat is the molarity of 4.0 moles of sodium chloride (NaCl) in 125 mL of solution?

Hint: 1 L of solution = 1000 mL of solution


Question 19 options:


500 M



32 M



0.50 M.



0.032 M

Answers

I think it’s 500 M, hope this helps

A flexible camping tank has a sample of butane gas at 17.2 atm and has volume of 6.5L. What will be the volume if the pressure is adjusted to
6.4 atm?

Answers

Answer:

If the pressure is adjusted to  6.4 atm, the volume will be 17.47 atm.

Explanation:

Boyle's law says that the volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure. That is, if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.

Mathematically, Boyle's law indicates that the product of pressure and volume always has the same value:

P*V= k

Analyzing an initial state 1 and a final state 2, it is satisfied:

P1*V1= P2*V2

In this case:

P1= 17.2 atmV1= 6.5 LP2= 6.4 atmV2= ?

Replacing:

17.2 atm* 6.5 L= 6.4 atm* V2

Solving:

[tex]V2=\frac{17.2atm*6.5 L}{6.4 atm}[/tex]

V2=17.47 L

If the pressure is adjusted to  6.4 atm, the volume will be 17.47 atm.

Organize the following list of atoms from lowest to highest Electronegativity:
Beryllium, Barium, Strontium, Magnesium, Calcium

Answers

Answer:

Barium<Strontium<Calcium <Magnesium< Beryllium

Explanation:

Electronegativity is defined as the ability of an atom in a bond to attract the shared electrons of the bond towards itself.

Electronegativity is a periodic trend that decreases down the group and increases across the period.

Hence, if i want to arrange Beryllium, Barium, Strontium, Magnesium, Calcium in order of increasing electronegativity, i will have;

Barium<Strontium<Calcium <Magnesium< Beryllium

Which element has 16 neutrons, 15 protons, and 15 electrons?

Answers

Answer:

phosphorus

Explanation:

Answer:

phosphorus

Explanation:

phosphorus has to lose electrons

¿en que estado de agregacion se encuentra un cuerpo con forma y volumen propio?

Answers

Answer: Um what is it?

Explanation:

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