need the answer ASAP ​

Need The Answer ASAP

Answers

Answer 1

Answer:

d

Explanation:


Related Questions

Why is Nertic zone particularly rich in living things?

Answers

Answer:

It is rich in organisms because sunlight passes through its shallow water enabling photosynthesis to occur.

Explanation:

I hope that helped!!

What is the molarity of a CsOH solution if 30.0 mL of the solution requires exactly 26.4 mL of 0.25 M HBr solution to neutralize it?

Answers

Answer: 8.89M

Explanation:

An atom of an element can be identified from its

A. atomic mass

B. number of neutrons

C. Total change

D. Number of protons

Answers

Answer:

D. number of protons

Explanation:

Sana makatulong

What is the independent variable and the dependent variable?

Answers

Answer: A variable that is intentionally changed during an experiment

Explanation:Hope it works

A wave is moving toward the shore If its frequency is 2.7 hertz, what is its wavelength? What would the correct number of significant figures be?

Answers

Answer:

λ = 1.1×10⁸ m

Explanation:

Given data:

Frequency of wave = 2.7 Hz

Wavelength of wave = ?

Solution:

Formula:

Speed of wave = frequency × wavelength

Speed of wave = 3×10⁸ m/s

now we will put the values in formula.

3×10⁸ m/s = 2.7 s⁻¹ × λ

λ = 3×10⁸ m/s /2.7 s⁻¹

λ = 1.1×10⁸ m

What are the three uses that can have a negative change on the land?
Development
Mining
Land reclamation
Agriculture

Answers

Answer:

i am pretty sure it is

Development

Mining

Land reclamation

Explanation:

Answer:

its development, mining, and agriculture I just took the assignment and got it right.

Explanation:

About how many times more massive is a neon atom than a helium atom?

Answers

Answer:

neon is about five times more massive than helium.

Explanation:

got this one right lol

What are the products in a chemical reaction?

A. The substances that result from a chemical reaction
B. The substances that do not take part in a reaction
c. The substances that cause the reaction to occur
thing
D. The substances that react in a chemical reaction

Answers

Answer:

A

Explanation:

The product is the result of the chemical reaction hope that helped

Which type of energy would digesting
food be?
A. Feild
B.solar
C. Thermal
D. kinetic
E. Tube
F. chemical

Answers

Answer:

F . chemical

Explanation:

Answer:

f

Explanation:

234 92U undergoes alpha decay. What is the atomic number of the resulting element. Express your answer numerically as an integer.

Answers

Answer:

90

Explanation:

Let ʸₓA be the resulting element when ²³⁴₉₂U under goes alpha decay.

Thus, the equation is given below

²³⁴₉₂U —> ʸₓA + ⁴₂He

The atomic number x of the resulting element can be obtained as follow:

92 = x + 2

Collect like terms

92 – 2 = x

90 = x

Therefore,

x = 90

Thus, the atomic number of resulting element is 90.

Suppose of iron(II) iodide is dissolved in of a aqueous solution of silver nitrate. Calculate the final molarity of iodide anion in the solution. You can assume the volume of the solution doesn't change when the iron(II) iodide is dissolved in it. Be sure your answer has the correct number of significant digits.

Answers

The question is incomplete, the complete question is;

Suppose 0.981 g of iron (II) iodide is dissolved in 150. mL of a 35.0 m M aqueous solution of silver nitrate. Calculate the final molarity of iodide anion in the solution, You can assume the volume of the solution doesn't change shen th s sove m Be sure your answer has the correct number of significant digits

Answer:

0.014 M

Explanation:

We have to first obtain the number of moles of FeI2

Molar mass of FeI2= 310 g/mol

So n = 0.981/310 = 0.0031 mol

Volume of solution = 150mL or 0.15L

Concentration of AgNO3 = 35mM * 10^-3 = 0.035M

number of moles of AgNO3 =  0.035 x 0.15 = 0.00525 mol

es

Equation of the reaction;

2AgNO3 + FeI2 -------> 2AgI + Fe(NO3

)2

Amount of excess FeI2 = 0.00525 - 0.0031 = 0.00215mol

Concentration of excess iodide in solution = Concentration of excess FeI2/volume of solution = 0.00215/0.15 =  0.0143M

Draw a structural formula for the ketal formed when two molecules of ethanol combine with one cyclohexanone molecule.

Answers

Answer:

Explanation:

The nucleophilic addition reaction of alcohol to a carbonyl compound in an acidic medium forms a hemiketal in the case of a ketone or a hemiacetal in the case of an aldehyde. When the carbonyl function is brought into contact with two alcohol functions, a ketal (for a ketone) or an acetal (for an aldehyde) is obtained.

From the image attached below, we will see how ketal formation occurs by the reaction of two molecules of ethanol with one cyclohexanone molecule.

Write the balanced Ka and Kb reactions for HSO3- in water. Be sure to include the physical states of each species involved in the reaction.Ka:_________Kb:_________NOTE: Use the chemical equation editor tool to input the physical states. Do not subscript the physical states of the compounds.

Answers

Answer:

Ka = [H₃O⁺] [SO₃²⁻] / [HSO₃⁻]

Kb = [OH⁻] [H₂SO₃] / [HSO₃⁻]

Explanation:

An amphoteric substance as HSO₃⁻ is a substance that act as either an acid or a base. When acid:

HSO₃⁻(aq) + H₂O(l) ⇄ H₃O⁺(aq) + SO₃²⁻(aq)

And Ka, the acid dissociation constant is:

Ka = [H₃O⁺] [SO₃²⁻] / [HSO₃⁻]

When base:

HSO₃⁻(aq) + H₂O(l) ⇄ OH⁻(aq) + H₂SO₃(aq)

And kb, base dissociation constant is:

Kb = [OH⁻] [H₂SO₃] / [HSO₃⁻]

Which TWO statements describe the ocean floor giving brainliest plz help and explain

Answers

Answer:

A.There are many active undersea volcanoes

B.There are long underwater mountain chains

What is the number of
nitrogen atoms in 12.0 g of
CO(NH2)?
[Avogadro constant = 6.02
x 1023 moll; Molar mass of
CO(NH2) = 60 g mol']​

Answers

Answer:

1.2 x 10²³atoms

Explanation:

Given parameters:

Mass of CO(NH₂)  = 12g

Unknown:

Number of Nitrogen atoms = ?

Solution:

Given compound;

     CO(NH₂);

  In;

         1 mole of CO(NH₂), we have 1 mole of N

let us find the number of moles of CO(NH₂);

  Number of moles  = [tex]\frac{mass}{molar mass}[/tex]

  Number of moles  = [tex]\frac{12}{60}[/tex]   = 0.2moles

Since

                  1 mole of CO(NH₂), we have 1 mole of N

                0.2 mole of CO(NH₂) will have 0.2mole of N

            1 mole of a substance contains 6.02 x 10²³ atoms

           0.2 mole of N will contain 0.2 x 6.02 x 10²³ atoms = 1.2 x 10²³atoms

Suppose you have 250.0 mL of a 0.350 M sodium hydroxide solution. How many moles of sodium hydroxide are in the solution?

Answers

Explanation:

number of moles can be derived from molarity law as shown in the figure

The number of moles of sodium hydroxide are in the solution should be considered as the 0.0875 moles.

Calculation of the number of moles:

Since there is 50.0 mL of a 0.350 M sodium hydroxide solution.

So here the no of moles should be

[tex]= Molarity * volume\\\\= 250 *10^-3 * 0.350[/tex]

= 0.0875 moles

hence, The number of moles of sodium hydroxide are in the solution should be considered as the 0.0875 moles.

Learn more about moles here: https://brainly.com/question/8759992

During electrolysis, where do reduction reactions occur?

Answers

Answer:

at the negative cathode

Explanation:

Reduction happens at the negative cathode because this is where positive ions gain electrons. Oxidation happens at the positive anode because this is where negative ions lose electrons.

Answer:

B. in the cathode of an electrolytic cell

Explanation:

True or False: A buffer solution containing equimolar amounts of the base, aniline, and the salt of its conjugate acid, aniline hydrochloride, will result in an acidic buffer solution. (aniline: Kb = 4.3x10-10)?

Answers

Answer:

It is TRUE!

Explanation:

Answer:

True is your answer

Explanation:

1.50 x 10^23 atoms Mg

Answers

تصادف تصادف تصادف تصادف

Which functional group will cause a compound to have a boiling point greater than that predicted only by molar mass?
-Alkene
-alkane
-ketone
-ether
-alcohol

Answers

Answer: Alcohol

Explanation:

What will the pressure of the gas be if the temperature rises to 87°C?
A. 60 kPa
B. 161 kPa
C. 16 kPa
D. 41 kPa

Answers

Answer:

A. 60 kPa

Explanation:

P2 = p1 times t2 / t1

HELP Which type of light is stored energy?
A. Kinetic
B. Potential
C. Thermal
D. Field

Answers

Answer:

B

Explanation:

Answer:

Potential

Explanation:

Chose the molecular formula that represents an organic molecule.

(A)C6H12O6
(B)NH2
(C)Cu2O
(D)H2O

Answers

All organic molecules must have carbon and hydrogen so it would be choice A

About how far does the S wave travel through Earth in 13 minutes? 2,000 km 4,000 km 6,000 km 8,000 km​

Answers

Answer:

It travel's about 4,000 km through the Earth in 13 minutes.

Answer:

4,000 km is the correct answer!!!

What is the volume of 139.05 g of neon gas at STP?
Ans:___L Ne

Answers

Given :

Mass of neon gas at STP.

To Find :

The volume of 139.05 g of neon gas at STP.

Solution :

Molar mass of neon, M = 20 g.

Number of moles in 139.05 g of neon :

n = 139.05/20 ≈ 7 moles

We know, volume of 1 mole of any atom/molecules in STP is 22.4 L of volume.

So, volume of 7 moles of neon is :

V = 7×22.4 L

V = 156.8 L

Therefore, volume of 139.05 g of neon gas at STP is 156.8 L.

A 30.00 mL sample of vinegar is titrated with 0.4190 M NaOH(aq). If the titration requires 27.83 mL of NaOH(aq), what is the concentration of acetic acid in the vinegar?

Answers

Answer:

0.389 M

Explanation:

Using the formula; CaVa = CbVb

Where;

Ca = concentration of acid

Cb = concentration of base

Va = volume of acid

Vb = volume of base

Based on the provided information in the question, Va = 30mL, Ca=?, Vb = 27.83mL, Cb = 0.4190 M

Hence, CaVa = CbVb

Ca = CbVb/Va

Ca = 0.4190 × 27.83 ÷ 30

Ca = 11.6607 ÷ 30

Ca = 0.3886

Ca = 0.389 M

Therefore, the concentration of acetic acid in the vinegar is 0.389 M

Sarah is investigating the transfer of energy in the
form of heat. One process that transfers energy
between two objects is conduction. Which statement
is not true about conduction?
A. It involves a transfer of energy in the form of heat.
B. It can transfer energy through empty space.
C. It requires direct contact between the objects.
D. It results in a change of temperature in both
objects.

Answers

Answer:

B

Explanation:

In order for any conduction to take place it needs to go through a solid. Therefore it cannot travel through empty space

Answer:

b

Explanation:

How is coffee, Lemonade, Soda, Vinegar, Orange Juice an acid?

Answers

i do not know this for sure but i would assume it is because the have a low pH level. the lower the level the more acidic it is. hope this helps!

plz help it's due in 5 min​

Answers

Answer:

what is the question then we can help you out

Answer:

51.84

Explanation:

can you help me plz..?!!​

Answers

Answer:you killed a person

Explanation:that is a example

I looked around just put these into your own words :)

Explanation:

One common method of separation is filtration. Filters are used everywhere. We use them in our houses to filter dust and mites out of the air we breathe. We use them to filter impurities from our water.

It is important to be able to separate mixtures to obtain a desired component from the mixture and to be able to better understand how each component works.

In chemistry and chemical engineering, a separation process is commonly used to transform a mixture of substances into two or more distinct materials. The separated products might differ in chemical properties or some physical property, such as size or crystal modification or other separation into different components.

Hopefully this helps you out.

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