Need help please
Balancing the equation in the pic

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:

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

Answer:

neon is about five times more massive than helium.

Explanation:

got this one right lol

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.

Answer:

what is the question then we can help you out

Answer:

51.84

Explanation:

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.

Answer:

A. 60 kPa

Explanation:

P2 = p1 times t2 / t1

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:

When base:

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

And kb, base dissociation constant is:

Answer: 8.89M

Explanation:

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:

Answer:

F . chemical

Explanation:

Answer:

f

Explanation:

Answer: A variable that is intentionally changed during an experiment

Explanation:Hope it works

Answer: Alcohol

Explanation:

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.

Answer:

It is TRUE!

Explanation:

Answer:

True is your answer

Explanation:

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

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.

Answer:

B

Explanation:

Answer:

Potential

Explanation:

Answer:

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

Answer:

4,000 km is the correct answer!!!

Answer:

A

Explanation:

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

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

Answer:

D. number of protons

Explanation:

Sana makatulong

Answer:

1. solid, 2.liquid, 3.gas.

Answer:

1 b. solid

2 a. liquid

3 c. gas

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

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.

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

Answer:

A.There are many active undersea volcanoes

B.There are long underwater mountain chains

Answer:

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

Explanation:

I hope that helped!!