Please help me a is due today and I don’t know this last question!!

Let's see

Apply boyles law

Answer:

Table of Resistivity and Conductivity at 20°C

Material ρ (Ω•m) at 20 °C Resistivity σ (S/m) at 20 °C Conductivity

Deionized water 1.8×105 5.5×10−6

Glass 10×1010 to 10×1014 10−11 to 10−15

Explanation:

Table of Resistivity and Conductivity at 20°C

Material ρ (Ω•m) at 20 °C Resistivity σ (S/m) at 20 °C Conductivity

Deionized water 1.8×105 5.5×10−6

Glass 10×1010 to 10×1014 10−11 to 10−15

Explanation:

Formula for Potential energy=mgh mass* gravity*height

21kg × 10 ×32=6720joules

If a 21.0 kg rock rests on the edge of a cliff 32.0 m high, the gravitational potential energy gained by the rock would be 6585.6 Joules.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.

As given in the problem a 21.0 kg rock rests on the edge of a cliff 32.0 m high, then we have to calculate the potential energy gained by the rock,

The potential energy of the rock = 21 × 9.8 × 32

                                                      = 6585.6 Joules.

Thus ,If a 21.0 kg rock rests on the edge of a cliff 32.0 m high, the gravitational potential energy gained by the rock would be 6585.6 Joules.

To  learn more about mechanical energy here, refer to the link ;

brainly.com/question/12319302

#SPJ2

Explanation:

I honestly don't understand why you post useless questiond

Answer:

3.13M

Explanation:

Using the Molaitry equation ( M = n/v ) just plug numbers in and solve.

Answer:

b. 96%

Explanation:

Answer:

2 and 4 are the best answers

Explanation:

Answer:

A and B

Explanation:

Took the k12 test.

The pH of an aqueous solution that has a concentration of 0.35 M NaF and pKa for HF = 3.14 is 3.6.

The pH of a solution refers to the degree of acidity or alkalinity of the solution. It can be calculated using the Henderson-Hasselbalch Equation as follows:

pH = pka + log ([A-]/[HA])

Where;

pH = pKa + log([F-]/[HF])

pH = 3.14 + log(1/0.35)

pH = 3.14 + 0.4559 = 3.595

Therefore, the pH of an aqueous solution that has a concentration of 0.35 M NaF and pKa for HF = 3.14 is 3.6.

Learn more about pH at: https://brainly.com/question/15289741

Answer:

i think Hostess but id K a lodging sector is an The hospitality industry encompasses a wide range of services and activities such as lodging, restaurants, food services, and convention centers. The lodging sector consists of hotels, motels, resorts, and bed and breakfasts.

Explanation:

Answer:

The wavelength of light is 68 nm.

Explanation:

Given data:

Binding energy of electron = 176 × 10³ Kj/ mol or (1.76× 10⁶ j/mol)

Wavelength of light require to remove the electron = ?

The equilibrium constant of the electriochmeical cell as shown is  2.976.

The equilibrium constant of a reaction shows the extent of the conversion of the reactants to products.

Now we know that;

ΔG = -nFE°cell

n = 2

F = 96,500 J/(V･mol)

E°cell = +0.0140 V

ΔG = -(2 *  96,500  * 0.0140)

ΔG = -2702 J

But;

ΔG = -RTlnK

lnK = -(ΔG/RT)

K = e^[-(ΔG/RT))

K = e^[-(( -2702)/8.314 * 298]

K = 2.976

Learn more about equilibrium constant: https://brainly.com/question/10038290

Answer:

D because: A Triple bond is when three pairs of electrons are shared between two atoms in a molecule. It is the least stable out of the three general types of covalent bonds.

Answer:

The percent by mass of sodium chloride in the broth is 0.1875 %

Explanation:

Our first step is transforming the sodium chloride figure from mg to g

450mg x 1g/1000 mg= 0.45g

Now, we must calculate the percentage by using the following formula:

0.45g / 240g x 100= 0.1875%

Henceforth, we can conclude that the percentage by mass of sodium chloride in the broth is 0.1875%

The per cent by mass of sodium chloride in the broth is 0.1875 %

The mass per cent of a component of a compound is the percentage ratio of the mass of the component by the total mass of the compound. The formula is mass per cent = (mass of component / total mass of compound) × 100.

Given data:

Mass of sodium chloride =450 mg = 0.45g

Now, we must calculate the percentage by using the following formula:

[tex]\frac{0.45gX 100}{240g }[/tex]

= 0.1875%

Hence, we can conclude that the percentage by mass of sodium chloride in the broth is 0.1875%

Learn more about the per cent by mass here:

https://brainly.com/question/20460129

#SPJ2

Answer:

D. The ability to damage human tissue

please give me brainliest.

Answer:

i believe sand and gravel because you can sift the sand

Explanation:

Answer:

Measuring electode potential

Explanation:

Make an electrode of all of them and measure standard reductive potential metals with lower srp will be more reactive

The metals which are placed above the hydrogen in the reactivty series can produce hydrogen gas with HCl. The order of reactivity of given metals is as follows: Zinc > iron > tin.

The reactivity series of elements or the activity series can be defined as the arrangement of metals in descending order according to their reactivities.

The metals placed at the top of the activity series are strong reducing agents and can be readily oxidized. These metals readily tarnish/corrode. The reducing ability becomes weaker while moving down the reactivity series.

The electropositivity of the elements decreases as we move down in the reactivity series of metals. All metals which are placed above hydrogen in the activity series can able to release hydrogen gas upon reacting with dilute HCl.

Therefore, the metals Iron, tin, and zinc release hydrogen gas when they react with the HCl. The order of reactivity is according to their reduction potential which is Zinc > iron > tin.

Learn more about the reactivity series, here:

brainly.com/question/13960839

#SPJ2

Answer:

60ax 70by 67ay ah251

Explanation:

Answer:

B

No the reaction is not at equilibrium

The reaction must run to the left (reactants) to reach equilibrium

Qc = 74.14

Explanation:

Qc = (0.254)^2 / ((2.29 x 10-2)(3.8 x 10-2))

Qc = 74.14

74.14 > 55.6

Qc > Kc

As with most stoichiometry problems, it is necessary to work in moles. The ratio of the moles of each element will provide the ratio of the atoms of each element.

Get the mass of each element by assuming a certain overall mass for the sample (100 g is a good mass to assume when working with percentages).

Remeber that percentages are a ratio multiplied by 100. You must convert percentages back to their decimal value before working with them.

(.4838) (100 g) = 48.38 g C

(.0812 ) (100 g) = 8.12 g H

(.5350) (100 g) = 53.38 g O

Convert the mass of each element to moles of each element using the atomic masses.

(48.38 g C) (1 mol/ 12.10 g C) = 4.028 mol C

(8.12 g H) (1 mol/ 1.008 g H) = 8.056 mol H

(53.38 g O) (1 mol/ 16.00 g O) = 3.336 mol O

Find the ratio or the moles of each element by dividing the number of moles of each by the smallest number of moles.

Use the mole ratio to write the empirical formula.

Answer:

solid

Explanation:

plasma = no

liquid= shapes is container it is in

gas = shaped to container also

Answer:

Scientists use the scientific method to make testable explanations and predictions about the world. A scientist asks a question and develops an experiment, or set of experiments, to answer that question. Engineers use the engineering design process to create solutions to problems.

Thermal energy is the sum of the kinetic and potential energy of all the particles in an object. The figure shows that if either potential or kinetic energy increases, thermal energy increases.

hope it really helps...!!!

Answer:

light years

Explanation:

light year is the DISTANCE light travels in one year ...a very large distance

Answer:

light years

Explanation:

since distance between galaxy space ,objects .

Answer:

physical

Explanation:

because it would still remain as a liquid. if you were to add borax or something to it, then it would be a chemical change.

Answer:

nebula

Explanation:

I am well informed

Answer:

2.19m

Explanation:

quizlet

Explanation:

allowing 20% discount on the market price of a watch the value of the watch will be rs 2376 when a VAT of 10% is added ,find it's market price

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The given pictures show conversion of energy from one form to another.

Electric energy to Heat energy

Wind energy to electric energy

Solar energy to light energy

Electric energy to light energy