Help me please!

What is the solubility of KNO3 in 100g of water at 60°C?

A.
28 grams/100g of H2O

B.
45 grams/100g of H2O

C.
108 grams/100g of H2O

D.
38 grams/100g of H2O

Answer:

Correct answer-C 5.3g

Explanation:

Molarity = no. of moles of solute/ volume of of solution in litre

olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125

olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,

olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,so the mass of 0.03125 moles of AgNO3 = 0.03125×169.87= 5.3084g

The grams of AgNO₃ are needed to prepare 0.125 M solution in 250 mL of water is 5.3 grams.

Moles is a unit which is used to define any amount and it is calculated as:

n = W/M, where

W = required mass

M = molar mass

Given molarity of AgNO₃ = 0.125 M

Volume of water = 250mL = 0.25L

moles (n) from the molarity (M) will be calculated as:

n = M × V

n = (0.125)(0.25) = 0.0312 moles

Now we calculate the mass of AgNO₃ by using the above formula as:

W = (0.0312mol)(169.87g/mol)

W = 5.30 g

Hence option (c) is correct.

To know more about moles, visit the below link:

https://brainly.com/question/15374113

Answer:

because water wets stuff expect for fire.

Answer:

The meaning of wet is covered or saturated with water or another liquid, showing that is a glass is covered in water it is considered wet.

Explanation:

Answer:

Q.1

Given=

V1=6.5ltr

P1=191.0kPa

T1= 750.pK

P2= 101.3kpa

T2= 298K

V2=?

Combined gas law: P1V1/T1 = P2V2/T2

 Use the gas laws for pressure, volume and temperature calculations

Now,

191.0×6.5/750= 101.3×V2/298

V2 = 191.0×6.5×298/750×101.3

On solving further

V2 = 4.86 ltr!

4.86 volume with the steam occupy in the atmosphere!

Q.2

Scientific Reasoning:-

Temperature is directly to proportional to the pressure in second scenario the temperature was reduced to nearly half of the first one hence the pressure also decreased simultaneously, and we all know according to charles law The volume of a given gas sample is directly proportional to its absolute temperature so the decreasing temperature affected the amount of volume that decreased!

Answer: The answer is A heat and pressure

Explanation:

Answer:

16 neutrons

hope this helped

Answer:

There are approximately 31 Neutrons in Phosphorous.

Explanation:

The atomic number for Phosphorous is 15

The element category for Phosphorous is non-metal

The number of Neutrons in Phosphorous are 31

Hope this helps! :)

The answer is B

Explanation:

Can you mark brainliest I correct

Answer:

Explanation:

1. Mass number

2. Protons

3. Electrons

Answer:

K2Cr2O7

Explanation:

Solubility refers to the amount of substance that dissolves in a given mass or volume of solvent. There are several units of solubility applicable in different areas.

Solubility is dependent on temperature. The solubility curve is a graphical representation of the dependence of solubility on temperature for different chemical species.

If we study the solubility curve closely, we will see that K2Cr2O7 has the highest solubility at 100°C. This means that if the trends continue, this substance will also have the highest solubility at 120°C.

Answer: c

Explanation:

Answer:

0.000236

Explanation:

Move the decimal point 4 times to the left of its original position

The scientific method is an empirical method of acquiring knowledge.

These are the 5 scientific methods:

Answer:

it would be 100 km/hr

Explanation:

if you divide each speed by the time you get 100 each time

Answer:

providing bins for each recyclable material could change Larry's mind, coz in return of unnecessary things of household she's getting bins in return so she might get interested!

Answer:

Usually, percent yield is lower than 100% because the actual yield is often less than the theoretical value. Reasons for this can include incomplete or competing reactions and loss of sample during recovery. ... This can happen when other reactions were occurring that also formed the product.

Explanation:

Answer:

Exothermic.

Explanation:

So if the sum of the enthalpies of the reactants is greater than the products, the reaction will be exothermic.

Answer:

Done and done

Explanation:

Answer:

Blood is liquid and red, just like a red river. And for humans without blood there is no life because there is nothing to transport nutrients and oxygen to the body cells. Hence blood is the red river of life.

Answer:

i think its because of how the blood is one of the main reasons we are alive today. And without it we'd die

Answer:allow for greater chances for a sentinel event

Explanation:

Answer:

The last one

Explanation:

To much eye contact may cause discomfort to the patient. I mean like looking at the client is good but with out a blink breaking is weird.

Answer:

Endothermic means: accompanied by or requiring the absorption of heat. So therefor cold packs would not be endothermic because they don't release cold. Instead they absorb heat

Explanation:

Answer:

Explanation:

Endothermic means accompanied by or requiring the absorption of heat, this view is not accurate because cold absorbs heat.

Answer:

607.9616 grams

Explanation:

Answer:

Acid–base indicators are generally weak protolytes that change color in solution according to the pH. The acid–base equilibrium of a weak acid type of indicator (HI) in water can be represented as. [I] The acid, HI, and the conjugate base, I−, have different colors. The equilibrium expression for this process is.

Explanation:

Answer: Heat Q = m·c·ΔT

Explanation: Mass of 1.00 mol water m= 18.016 g. Heat capacity of water is

c= 4.19 J/( g K) and change of temperature ΔT= 100 K

Answer:

Option A. KCl (aq)

Option D. Mg(OH)₂(s

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

MgCl₂(aq) + KOH(aq) —>

In solution, MgCl₂(aq) and KOH(aq) will dissociate as follow:

MgCl₂(aq) —> Mg²⁺(aq) + 2Cl¯(aq)

KOH(aq) —> K⁺(aq) + OH¯(aq)

MgCl₂(aq) + KOH(aq) —>

Mg²⁺(aq) + 2Cl¯(aq) + 2K⁺(aq) + OH¯(aq) —> 2K⁺(aq) + 2Cl¯(aq) + Mg(OH)₂ (s)

MgCl₂(aq) + KOH(aq) —> 2KCl (aq) + Mg(OH)₂(s)

Thus, the products of the above reaction are: KCl(aq) and Mg(OH)₂(s)

Thus, option A and D gives the correct answer to the question.

Answer:

$100

Explanation:

550/7=50

50×2=100

Answer:

0.208333 M

Explanation:

M2=M1V1/V2=(0.25 M)(125mL)/(125mL+25 mL)= 0.208333 M

Answer:

1, you should use candles for experiments because, You created an area of low pressure! When the experiment is run you can see tiny bubbles escaping under the glass which shows that the increased air pressure from the heated air as the candle burns. Once the candle runs out of oxygen, the candle burns out and the remaining air inside cools down.

2. you should put candles on sand trays, Pour layers of sand into a glass vase, alternating colors with each layer. For a more interesting look, try uneven layers in various heights. Keep layering sand until you're a few inches from the top of the vase. Place your votive candle in the center of the sand.

Explanation:

its scientific proven

Answer:

Cooling is at the bottom, Pressure is in the middle, and Settling is at the top