Can someone please help me!!

Can Someone Please Help Me!!

Answers

Answer 1

Answer:

Explanation:

Hope this helps u!!

Can Someone Please Help Me!!
Can Someone Please Help Me!!

Related Questions

what is the digiMelt Start Temp and the digiMelt Stop Temp for Formic Acid Acetic Acid Propionic Acid

Answers

Explanation:

Melting is defined as the physical process where a solid state of a substance converts into its liquid state. No change of chemical composition takes place, just the physical state of water is changing.

[tex]\text{Solid}\rightleftharpoons \text{Liquid}[/tex]

There are given carboxylic acids. The melting point of these acids increases to its second group member which is ethanoic acid due to prevalent hydrogen bonding. To break this bonding, a high amount of heat needs to be applied.

But as we move forward, the melting point decreases sharply as an increase in the number of carbon atoms decreases the hydrogen bonding.

Melting point of Formic Acid = [tex]8.3^oC[/tex]

Melting point of Acetic Acid = [tex]16.6^oC[/tex]

Melting point of Propionic Acid = [tex]-21^oC[/tex]

is kcn a ternary ionic compound?

Answers

Answer:

The given molecule is KCN.

Is it a ternary ionic compound?

Explanation:

A ternary ionic compound is one that consists of at least one polyatomic ion/radical.

In the given molecule,

the ions present are:

K+ and CN-.

CN- is a polyatomic acidic radical.

Hence, the given molecule is ternary ionic compound.


Ethanol has a heat capacity of 2.46 Jig 'c. If 50 g of ethanol has a temperature of 30°C and a piece of hot Copper is added to the ethanol causing the
temperature to increase to 70°C. What is the amount of heat absorbed by the ethanol?

Answers

Explanation:

there it is fella tried on ma own consciousness

Which will boil faster distilled water or salt water and why?

Answers

Answer:

The distilled water will be boiled faster as it does not contain any non - volatile solute.

- The salty water contains different non - volatile salts in it.

- Due to the presence of these salts, its vapour pressure will be decreased and boiling point will be elevated.

- So, salty water will take more time to boil.

- On the other hand, distilled water does not have any such solute and due to this its vapour pressure will not be affected.

- Hence, it will boil fast than salty water.

How many moles of H2O
moles of H2O are needed to produce 55.7 moles of H2?

Answers

Answer: 55.7 moles of [tex]H_2O[/tex] are needed to produce the given amount of [tex]H_2[/tex]

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given values:

Moles of [tex]H_2[/tex] = 55.7 moles

The chemical equation for the decomposition of water follows:

[tex]2H_2O\rightarrow 2H_2+O_2[/tex]

By the stoichiometry of the reaction:

If 2 moles of hydrogen gas is produced from 2 moles of water

So, 55.7 moles of hydrogen gas will be produced by = [tex]\frac{2}{2}\times 55.7=55.7mol[/tex] of water

Hence, 55.7 moles of [tex]H_2O[/tex] are needed to produce the given amount of [tex]H_2[/tex]

Taking into account the reaction stoichiometry,

Reaction stoichiometry

In first place, the balanced reaction is:

2 H₂O → 2 H₂ + O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

H₂O: 2 molesH₂: 2 molesO₂: 1 mole

Moles of H₂O required

The following rule of three can be applied: if by reaction stoichiometry 2 moles of H₂ are produced from 2 moles of H₂O, 55.7 moles of H₂ are produced from how many moles of H₂O?

[tex]moles of H_{2} O=\frac{55.7 moles of H_{2}x 2 moles of H_{2} O}{2 moles of H_{2}}[/tex]

moles of H₂O= 55.7 moles

Finally, 55.7 moles of H₂O is requiredto produce 55.7 moles of H₂.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

brainly.com/question/24653699

Identifying Conditions for Natural Selectlon
What are the conditions required for natural selection? Check all that apply.

Answers

Answer:

reproduction, variation in fitness, heredity, variation in individual characters

Cells can regulate different processes in two ways. They can turn on and off the genes that make enzymes, or they can

A)

increase the activation energy of a reaction.

B)

increase the amount of energy needed to carry out the preferred process.

C)

regulate the enzymes that are already made.

D)

decrease the amount of energy needed to carry out the preferred process.

Answers

Answer:

im pretty sure its d

Explanation:

What is20 grams of HNO^3

Answers

63.01284*20=1260.568

Explanation:

Here are the answers for both of the question you send :)

hope this helps you to understand:)

Al2S3 + 6H20 + 2Al(OH)2 + 3H2S

How many TOTAL number mole to mole ratios will there be total?​

Answers

Answer:

the correct answer is 23:19

Additional Activities

Direction: Sharpen your understanding in projectile motion. Calculate the maximum height reached and the horizontal range of the given launched angles and initial velocity of a projectile. You may opt to use the Projectile Motion Simulation with Air Friction by AERDEMIR which can be downloaded via Play Store for free.


1. To use the simulator, set the given values as shown in the left.

Start Angle = Launched Angle = refer to the table Start Velocity = Initial Velocity = 20 m/s

Change the gravitational acceleration to 9.8 only Delete the values in Air Density and Drag Coefficient

2. Deactivate the friction force by tapping the icon indicated in the above image.

Answers

The maximum height of an object, given the initial launch angle and initial velocity is found with:

h = v2 is in2θi 2g

h = v i 2 sin 2 ⁡ θ i 2 g.

A solution has a [H3O+] of 1 × 10−3 M. What is the [OH−] of the solution?
A. 11 M
B. 14 M
C. 1 × 10−14 M
D. 1 × 10−11 M

Answers

Answer:

D. 1x10⁻¹¹ M

Explanation:

For any given aqueous solution the following formula is true:

1x10⁻¹⁴ = [H₃O⁺] * [OH⁻]

1x10⁻¹⁴ is the ion-product constant of water, Kw.

We input the given value of [H₃O⁺]:

1x10⁻¹⁴ = 1x10⁻³ * [OH⁻]

And solve for [OH⁻]:

[OH⁻] = 1x10⁻¹¹ M

Thus the correct answer is option D. 1x10⁻¹¹ M.

Answer:

D. 1x10⁻¹¹ M

Explanation:

I took the test :)

PLS I REALLY NEED HELP DUE FODAY
For the reaction of hydrogen gas with iodine gas to make hydrogen iodide gas, H2 + 12 → 2HI, you have the following concentrations at equilibrium: [HQ] = 4.5647 x 10-3 M, [12] = 7.378 x 10-4 [HI] = 1.3544 x 10-2 M. M, and What is the equilibrium constant?
0.4997
0.54
46.33
54.47​

Answers

Answer: The equilibrium constant for the reaction is 54.47

Explanation:

The equilibrium constant is defined as the ratio of the concentration of products to the concentration of reactants raised to the power of the stoichiometric coefficient of each. It is represented by the term [tex]K_{eq}[/tex]

The given chemical equation follows:

[tex]H_2+I_2\rightleftharpoons 2HI[/tex]

The expression for equilibrium constant will be:

[tex]K_{eq}=\frac{[HI]^2}{[H_2][I_2]}[/tex]

We are given:

[tex][HI]_{eq}=1.3544\times 10^{-2}M[/tex]

[tex][H_2]_{eq}=4.5647\times 10^{-3}M[/tex]

[tex][I_2]_{eq}=7.378\times 10^{-4}M[/tex]

Putting values in above expression, we get:

[tex]K_{eq}=\frac{(1.3544\times 10^{-2})^2}{(4.5647\times 10^{-3})(7.378\times 10^{-4})}\\\\K_{eq}=54.47[/tex]

Hence, the equilibrium constant for the reaction is 54.47

Calculate the volume of this regular solid.
What is the volume of the rectangular prism?
1
6 cm
5 cm
9 cm

Answers

Please mark brainliest

Answer:
270 cm cubed
Explanation:
You multiply them all together to get the volume

How much heat energy is released if 24.3 g of gold is cooled from 2580.0°C to room temperature (20.0°C)?

Answers

Answer:

-8024.832 J

Explanation:

The amount of heat energy lost or released, Q, can be calculated thus;

Q = m × c × ∆T

Where;

Q = amount of heat lost (J)

m = mass of substance (g)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

According to this question,

Q = ?

m = 24.3 g

c of Gold = 0.129 J/g°C

∆T = 20°C - 2580.0°C = -2560°C

Using Q = m × c × ∆T

Q = 24.3 × 0.129 × -2560°C

Q = -8024.832 J

This means that 8024.832 J of energy is lost or released.

what do u mean by change in state of matter?define it.

Answers

Answer:

The mode of changing from one state of matter into another state and back to the former or original state is called change in state of matter .

hope it is helpful to you

Answer:

change in one state from another and back in its own original is known as change in state of matter

What is the uses of seawater as a source of renewable energy?​

Answers

Explanation:

Desalination of seawater is considered a renewable source of water, although reducing its dependence on fossil fuel energy is needed for it to be fully renewable.

1. A light bulb is filled with 3.54 g of argon at 25 C and 725 mmHg. What is
the volume of this gas?

Answers

Answer: The volume of given gas is 2.27 L.

Explanation:

Given: Mass = 3.54 g

Temperature = [tex]25^{o}C[/tex] = (25 + 273) K = 298 K

Pressure = 725 mm Hg (1 mm Hg = 0.00131579) = 0.95 atm

As moles is the mass of substance divided by its molar mass.

So, moles of argon (molar mass = 40 g/mol) is as follows.

[tex]Moles = \frac{mass}{molar mass}\\= \frac{3.54 g}{40 g/mol}\\= 0.0885 mol[/tex]

Formula used to calculate the volume of given gas is as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

[tex]PV = nRT\\0.95 atm \times V = 0.0885 mol \times 0.0821 L atm/mol K \times 298 K\\V = 2.27 L[/tex]

Thus, we can conclude that the volume of given gas is 2.27 L.

Calculate the pressure kPa of 0.421 mole of helium gas at 254 degree celsius when it occupies a volume of 3.32 L.

Answers

I didn’t understand the question ♥️

relate the intermolecular forces in hydrocarbons to their physical properties and uses

Answers

The physical properties of alkenes and alkynes are generally similar to those of alkanes or cycloalkanes with equal numbers of carbon atoms. Alkynes have higher boiling points than alkanes or alkenes, because the electric field of an alkyne, with its increased number of weakly held π electrons, is more easily distorted, producing stronger attractive forces between molecules.

explain observation Made when anhydrous calcium chloride and anhydrous copper 2 sulphate are separately exposed to the atmosphere for much 2 days​

Answers

Calcium chloride is deliquescent.

If exposed to air, it will absorb sufficient water from the air to allow it to dissolve. After a short while, instead of a white lump, you will have a pool of clear liquid.

In the titration of a solution of Sodium hydroxide, an acid titrant was prepared by diluting 125.0 mL of 10.00 mol/L Nitric acid into enough distilled water to make 500.0 mL of solution. 30.0 mL of the base was measured, and in the titration, 16.74 mL of the acid titrant was needed to neutralize. Determine the concentration of the Sodium hydroxide.

Answers

Answer:

1.395M NaOH

Explanation:

Sodium hydroxide, NaOH, reacts with nitric acid, HNO3, as follows:

NaOH + HNO3 → NaNO3 + H2O

Where 1mol of NaOH reacts with 1mol of HNO3

To solve this question we must find the concentration of the titrant. With the concentration and the needed acid we can find the moles of HNO3 added = moles NaOH in the solution. With the moles of NaOH and its volume we can find its concentration as follows:

HNO3 concentration:

10.00mol/L HNO3 * (125.0mL/500.0mL) = 2.500M HNO3

Moles HNO3 = Moles NaOH:

16.74mL = 0.01674L*(2.500mol/L) = 0.04185 moles HNO3 = Moles NaOH

Concentration NaOH:

0.04185 moles / 0.0300L =

1.395M NaOH

Aqueous sulfurous acid decomposes into sulfur dioxide gas and liquid water. Write a chemical equation for this reaction.

Answers

Answer:When trying to concentrate the solution by evaporation to produce waterless sulfurous acid it will decompose

Explanation:

Explanation:

here's the answer to your question

In a polar molecule, the partial positive charge on one molecule is attracted toward the partial _____ charge on a nearby molecule.

Answers

Answer:

negative

Explanation:

Opposite charges attract. Therefore the partial positive charge will be attracted to the partial negative charge

1
A coil of wire with an iron inside
becomes an? when there is
current.
Enter your answer

Answers

Answer:

A magnet

Explanation:

This graph represents a population of molecules in a gas versus the distribution of the average velocity(speed) of its molecules in that population. Assume all molecules to be of the same mass. In reading the graph, it is important to note three things. One, is the most probable speed is at the peak of the curve. Secondly, the most probable speed increases as the temperature increases (so shift to the right), and the distribution broadens as it increases.


On the graph, indicate the average kinetic energy of the population.

Explain your answer.

What part of the graph indicates the temperature of the sample?

Explain your answer.

Sketch a curve that represents the distribution of molecules at a temperature below the one shown. Label it as T2. Describe both T and T2 in terms of their average kinetic energy. Be specific and detailed.

Submit your answer below.

Answers

Answer:

Part A

Given that the graph is symmetrical and bell shaped, the average kinetic energy is given by the midline of graph, which corresponds to the common speed of the highest number of the population

Part B

The formula for the average kinetic energy, K.E. = (3/2)·(R/NA)·T

Therefore, the part of the graph that indicates the temperature of the sample is the average kinetic energy. K.E.

Part C

At a lower temperature, the heat is less evenly distributed and we have the distribution T2 higher than T1

Please see the attached graph created with MS Visio

Explanation:

Which explains why the laws
motion are scientific laws?
O A. The theories of motion became laws after there was enough
evidence to prove they were true.
O B. The laws cannot be tested by experiments, but scientists know
that they are correct because they make sense mathematically.
c. The laws explain how objects move and are supported by
experimental evidence.
O D. The laws describe a wide range of observations of motion and can
be used to predict the motion of objects.
Did

Answers

Answer:

D

Explanation:

Scientific laws describe how things work with little to no exception. They do NOT provide an explanation to WHY something occurs.

Answer:

The answer is D because scientific laws describe how things work not why they happen.

. A circuit is set up with two parallel resistors, each of a resistance of 250Ω. a. What is the total resistance for this circuit?

Answers

Answer:

125 ohms

Explanation:

since they're parallel we do

1/total resistance = (1/250 ohms) + (1/250 ohms)

then you get 2/250 ohms

then you flip it so it's equal to total resistance/1

250÷2= 125

Question: What happens with the electrons between two atoms in a polar covalent bond?
a) Electrons are equally shared
b) Electrons are transferred
c) Electrons are unequally shared
d) Electrons become mobile in a ‘sea of electrons’

Answers

Answer:

c) Electrons are unequally shared

2 NaOH + H2SO4 2 H2O + Na2S04
a. How many grams of sodium sulfate will be formed if you start with 300 grams of sodium
hydroxide?

Answers

Answer:

532.5 grams

Explanation:

The balanced chemical equation of this reaction is as follows:

2NaOH + H2SO4 → 2H2O + Na2S04

From the above balanced equation, it shows that 2 moles of sodium hydroxide (NaOH) produces 1 mole of sodium sulfate (Na2SO4).

Using mole = mass/molar mass to convert mass to mole

Molar mass of NaOH = 23 + 1 + 16 = 40g/mol

mole = 300/40

mole = 7.5moles of NaOH

Since 2 moles of sodium hydroxide (NaOH) produces 1 mole of sodium sulfate (Na2SO4).

Then, 7.5 moles of NaOH will produce 7.5/2 = 3.75moles of Na2SO4.

mole = mass/molar mass

Molar mass of Na2SO4 = 23(2) + 32 + 16(4)

= 46 + 32 + 64

= 142g/mol

Mass of Na2SO4 = 3.75 × 142

= 532.5g

A doctor is testing a new medication and he doesn’t tell the people in the study about the possible side effects of the medicine. He is _____.

Answers

Answer: He is being non-compliant
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Where is it saves three times as much money as Anna. If a represents Anna savings. Which relationship shows how much money they have saved, S, together A community shares a vegetable garden in a park each summer. Last year, it took Sapphire 88 hours to plant the garden by herself. The year before, it took Varsha 66 hours to plant the same garden by herself.This year, if Sapphire and Varsha work together to plant the same vegetable garden, it would take ??? hours.What is ??? Give 2 reasons why children from the same family won't look alike what is the difference between the domain and the range of a function? If m and n are rational numbers such that root m + root n = root 7+ 48, calculate the possiblevalue of m^2+n^2?. In Hard Times, what is Charles Dickenss purpose in describing the scenes setting as a plain, bare, monotonous vault of a schoolroom? What is the role of the alcohol component in a tincture?a. to limit the growth of bacteriab. to make the drug insolublec. to allow for slow release of the drugd. to avoid stomach irritation please can someone help me with this 3x+3y=18 x+2y=9 find x and y A 7.5-kg rock and a 8.9 10-4-kg pebble are held near the surface of the earth. (a) Determine the magnitude of the gravitational force exerted on each by the earth. (b) Calculate the magnitude of the acceleration of each object when released. If a card is randomly selected, what is the probability that the card is any one suit, e.g., a diamond, heart, spade, or club? QuestionAn employee makes $24 per hour during the normal week. This weekend that employee will make $36 per hour since it is a holiday. What is the percent increase in pay? Lighting is the movement of? The "Truth in Savings Law" requires banks to advertise their rates on investments such as CDs and savings accounts as annual percentage yields (APY).a) trueb) false what additional piece of information do we need to prove that MLN OPN I NEED HELP PLEASE AND PLEASE DONT PUT ANSWERS THAT HAVE NOTHING TO DO WITH WHAT IM ASKING PLEASE PUT THE CORRECT ANSWER I WILL GIVE BRAINLIEST TO WHOEVER IS THE BEST ANSWERAct 1 Scene 1 Writing AssignmentAfter reading Act 1 Scene 1 in Romeo and Juliet and reading the summary chart below, explain how the following pairs see one another/think of one another. Use character names and lines and citations from the Middle English version of the play for clarityMontagues vs. CapuletsThe Prince vs. the fighting between the two familiesBenvolio vs. RomeoSummary of Act I scene i:Setting, a street in Verona, ItalyIn Act I scene i of Romeo and Juliet, Shakespeare sets up the rivalry between the families of Romeo and Juliet. Romeos family is the House of Montague and Juliets family is the House of Capulet.Two servants from each House meet on the street in Verona, Italy. They argue and trade insults about each others Houses. A fight ensues. Benvolio, Romeos cousin, draws his sword to stop the fight. Tybalt, Juliets cousin, sees Benvolios sword drawn and draws his sword.The fight grows as other people join in. Finally, the Prince breaks up the brawl. He is tired of the feud between the Montagues and Capulets.The scene ends with the Montagues, Romeos parents asking Benvolio if they have seen Romeo lately. Benvolio sees Romeo in the distance and tells his parents he will find out what is wrong with him. Will give out Brainliest! Can somebody please explain how to find the linear regression equation given a data table step-by-step? What is the domain of the relation given by the set of ordered pairs shown? { ( - 3, 2 ), ( - 1, 0 ), ( - 3, 5 ), ( 2, - 3 ) }List the domain as a set, in increasing order. Assume that you have a three-year-old daughter and you have come to appreciate the power of saving and investing. Can you open up and put money into a Roth IRA in your child's name so that she can benefit from many years of compounding Please HELP! Given this graph of function f(x), find f (-2)