A measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L.

Answers

Answer 1

Answer:

Answer:Concentration is a measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L.

Explanation:

Related Questions

Cartilage is not flexible. True False
What Is a high-temperature physical state of matter in which atoms lose their electrons?
An element has an atomic number of 30. How many protons and electrons are in a neutral atom of the element? A. 30 protons, 30 electrons B. 15 protons, 15 electrons C. 60 protons, 30 electrons D. 30 protons, 0 electrons
Describe the specific location where the head of the caudate nucleus is continuous with its body within the brain. What is the significance of this continuity, and how does it relate to the functions associated with the caudate nucleus?
If 21.3 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 297 kelvin and 1.40 atmospheres?

Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1."Al + HCl → AlCl3 + H2

Answers

The balanced equation is:

2Al + 6HCl -> 2AlCl3 + 3H2

There are 2 Al, 6H, and 6 Cl making the equation balanced and if you need the coefficients in order it is: 2,6,2,3

Answer:

2Al + 6HCl -> 2AlCl3 + 3H2

Explanation:

A piece of sodium metal reacts completely with water as follows: 2Na(s) + 2H2O(l) ⟶ 2NaOH(aq) + H2(g) The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 246 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)

Answers

Answer:

$\large \boxed{\text{0.449 g}}$

Explanation:

1. Gather all the information in one place

M_r: 22.99

2Na + 2H₂O ⟶ 2NaOH + H₂

$\, p_{\text{tot}} = \quad \text{1.00 atm}\np_{\text{H2O}} = \text{0.0313 atm}$

T = 25.0 °C

V = 246 mL

2. Moles of H₂

To find the moles of hydrogen, we can use the Ideal Gas Law:

pV = nRT

(a) Calculate the partial pressure of the hydrogen

$p_{\text{tot}} = p_{\text{H2}} + p_{\text{H2O}}\n\text{1.00 atm} =p_{\text{H2}} +\text{0.0313 atm}\np_{\text{H2}} = \text{0.9687 atm}$

(b) Convert the volume to litres

V = 246 mL = 0.246 L

(c) Convert the temperature to kelvins

T = (25.0 + 273.15) K = 298.15 K

(d) Calculate the moles of hydrogen

$\begin{array}{rcl}\text{0.9687 atm}* \text{0.246 L} & = & n * 0.082 06 \text{ L}\cdot\text{atm}\cdot\text{K}^(-1)\text{mol}^(-1) * \text{298.15 K}\n0.2383 & = & 24.47n \text{ mol}^(-1)\n\nn & = & \frac{0.2383}{24.47\text{ mol}^(-1)}\n\n& = & 0.009740 \text{ mol}\n\end{array}$

3. Moles of Na

The molar ratio is 2 mol Na: 1 mol H₂

$\text{Moles of Na} =\text{0.009 740 mol H}_(2) * \frac{\text{2 mol Na}}{\text{1 mol H}_(2)} = \text{0.019 48 mol Na}$

4. Mass of Na

$\text{Mass of Na} = \text{0.019 48 mol Na} * \frac{\text{22.99 g Na}}{\text{1 mol Na}} = \text{0.449 g Na}\n\n\text{The mass of Na used was $\large \boxed{\textbf{0.449 g}}$}$

The number of grams of sodium used in the reaction will be approximately 0.1387 grams.

To calculate the number of grams of sodium used in the reaction, we need to use the ideal gas law and consider the effect of the vapor pressure of water on the pressure of the collected hydrogen gas.

Given data:

Volume of hydrogen gas (V) = 246 mL = 0.246 L

Pressure of hydrogen gas (P) = 1.00 atm

Vapor pressure of water (P_water vapor) = 0.0313 atm (subtracted from the total pressure)

Temperature (T) = 25.0°C = 298.15 K

The ideal gas law is given by the equation: PV = nRT, where n is the number of moles of the gas.

First, calculate the total pressure by subtracting the vapor pressure of water from the given pressure of the gas:

Total pressure (P_total) = P - P_water vapor

= 1.00 atm - 0.0313 atm = 0.9687 atm

Now, rearrange the ideal gas law equation to solve for n (moles of gas):

n = PV / RT

Plug in the values:

n = (0.9687 atm × 0.246 L) / (0.0821 L·atm/mol·K × 298.15 K)

n ≈ 0.01206 mol

According to the balanced chemical equation, 2 moles of sodium (Na) produce 1 mole of hydrogen gas (H₂). Therefore, the number of moles of sodium used in the reaction is half of the calculated moles of hydrogen gas:

Moles of sodium = 0.01206 mol / 2 = 0.00603 mol

Finally, calculate the mass of sodium (molar mass of sodium = 22.99 g/mol)

Mass of sodium = Moles of sodium × Molar mass of sodium

Mass of sodium = 0.00603 mol × 22.99 g/mol

≈ 0.1387 g

Therefore, the number of grams of sodium used in the reaction is approximately 0.1387 grams.

To know more about sodium here

brainly.com/question/18069204

#SPJ3

How many images of a candle will be formed if it is placed between two plane mirrors inclined at an angle of 45?

Answers

A candle placed between two plane mirrors inclined at an angle of 45 degrees will form 7 images. This is due to multiple reflections between the mirrors. The number of images depends on the angle between the mirrors.

In physics, when a candle is placed between two plane mirrors inclined at an angle of 45 degrees, 7 images will be formed. This happens due to multiple reflections between the mirrors. As per the formula for number of images n = 360/θ - 1, where θ is the angle between the mirrors, for an angle of 45 degrees, we get n = 360/45 - 1 = 7. The actual number of images can be less than this if they overlap each other.

Learn more about Reflections here:

brainly.com/question/30964050

#SPJ1

What form of energy is found in surgar

Answers

Chemical energy would be the answer. :)

well from what I know I am pretty sure that it is chemical energy

Which statement best explains water’s ability to dissolve covalent compounds?a. Water can dissolve polar covalent compounds through dipole-dipole interactions.
b. Water can dissolve nonpolar covalent compounds through hydrogen-bonding interactions.
c. Water can dissolve polar covalent compounds through ion-dipole interactions.
d. Water can dissolve nonpolar covalent compounds through dipole-dipole interactions.

Answers

The correct answer for the question that is being presented above is this one: "c. Water can dissolve polar covalent compounds through ion-dipole interactions." The statement that best explains water’s ability to dissolve covalent compounds is that Water can dissolve polar covalent compounds through ion-dipole interactions.

Answer:

a. Water can dissolve polar covalent compounds through dipole-dipole interactions.

Explanation:

It's the correct answer on Edge 2021. If anyone asks, you didn't hear it from me ;)

Given the balanced equation: 3fe3+(aq) + al(s) → 3fe2+(aq) + al3+(aq)what is the total number of moles of electrons lost by 2 moles of al(s)?

Answers

Answer is: the total number of moles of electrons lost by two moles of aluminium are six moles (6 mol).
Oxidation half reaction: Al° → Al³⁺ + 3e⁻, lost of electrons.
Reduction half reaction: Fe³⁺ + e⁻→ Fe²⁺ /·3; 3Fe³⁺ + 3e⁻→ 3Fe²⁺; gain of electrons.
One mole of aluminium lost 3 moles of electrons, so 2 moles of alumiunim:
2 · 3 mol = 6 mol.

Other Questions

Which law states that the volume of a gas is proportional to the moles of the gas when pressure and temperature are kept constant?

A sample of gas has increased in temperature from 20° Celsius to 22° Celsius. Which of the following happens as the temperature of the gas goes up? The gas undergoes a phase change. The velocity of the gas particles decreases. The kinetic energy of the particles increases. An exothermic reaction is more likely to occur.

Does a reaction occur?Pb + Cu(CIO), → Pb(ClO3)2 + Cu

At higher temperatures, vapor pressures are lower. TRUE FALSE