For the simple reaction of A + B ---> C, if A is the limiting reactant for a certain set of conditions, then B is an excess reactant. True or False

Answer:

H₂

Explanation:

To solve this question we must find, as first, find the molar mass of the homonuclear diatomic gas using Graham's law. With the molar mass we can identify this gas

Graham's law:

[tex]\frac{V_a}{V_b} =\sqrt{\frac{m_B}{m_A} }[/tex]

Where V is the speed of the gases and m the molar mass of those:

As Va is 3.98 times Vb (And mB is molar mass of oxygen gas = 32g/mol)

[tex]3.98 =\sqrt{\frac{32g/mol}{m_A} }[/tex]

15.84 = 32g/mol / mA

mA = 2.02g/mol

As is a homonuclear diatomic gas, the molar mass of the atom is 1.01g/mol. Thus, the gas is:

Answer:

Explanation:

False. The greater the concentration, the lower the freezing point.

Answer:

Do you have an idea that you want the design to be about? if you do I can help! if not I can give you ideas you can try to work with and you can tell me if theyre good or not.

Explanation:

Answer:

B

Explanation:

Answer:

c.hg cannot be cracked for fractional distillation as there is only one of each

Explanation:

Answer:

60.0L of hydrogen are needed

Explanation:

Based on the reaction:

3H₂ + N₂ ⇄ 2NH₃

3 moles of hydrogen react 1 mole of nitrogen.

To solve this question we have to find the moles of nitrogen. With the moles of nitrogen we can find the moles of hydrogen. Using PV = nRT at STP conditions we can find the volume as follows:

Moles Nitrogen -Molar mass: 28g/mol-

25.0g N₂ * (1mol / 28g) = 0.893 moles N₂

Moles hydrogen:

0.893 moles N₂ * (3mol H₂ / 1mol N₂) = 2.679 moles H₂

Volume hydrogen:

PV = nRT

V = nRT / P

Where V is volume in liters,

n are moles of the gas: 2.679 moles

R is gas constant: 0.082atmL/molK

T is absolute temperature: 273.15K at STP

P is 1atm at STP

Replacing:

V = 2.679mol*0.082atmL/molK*273.15K / 1atm

V =

Answer:

Answer:133.4

c

m

3

Explanation: Explanation:

Molarity is number of moles of solute divided by number of litres of solution.

M

=

n

V

Rearrange for V to give

V

=

n

M

Number of moles of KCl is the mass divided by the molar mass of KCl which is 75.5 g/mol, so (5/75.5) = 0.0667 moles.

Now plug in the numbers:

V

=

n

m

=

0.0667

0.5

=

0.1334

litres

So you need to add 0.1334 litres of 133.4

c

m

3

of water.

(NB: symbol for molarity is upper case M. m is metres).

Answer:

Hi! I'm feeling great and happy! Life's been good! How are you? :) Hope life's good for you and that you are staying safe.

Explanation:

Answer:transfer oxygen through your blood

Explanation:

Answer:

coordinate the muscles that control breathing

hope this helps ⭐

Answer:

C)9.5

Explanation:

Given poH=4.5

find ph

from 14=ph+poh

14=ph+4.5

ph=9.5

Answer:

D. Electrical energy is changed into mechanical energy

Explanation:

When you turn on the fan, the electricity that is given through the power outlet allows the fan to have the available energy to spins the fan blades. By the fan's blades spinning, this is a movement that can be described as mechanical energy.

Among all the given options, option d is correct options. Fossil fuels developed from the organic remnants of ancient plants and animals.

Fossil fuels are vital natural resources, as is widely known. They provide significant benefits to humanity, and we depend on them for energy. However, using fossil fuels has drawbacks as well.

Fossil fuels developed from the organic remnants of ancient plants and animals. The heat and pressure of the crust caused Earth to transform these million-year-old leftovers into fuels that include carbon.

The need for energy only increased after the Industrial Revolution. Similar to that, these fuels have had the ability to generate enormous amounts of energy to meet this need.

Therefore, the correct option is option D.

To learn more about Fossil fuels, here:

https://brainly.com/question/29770775

#SPJ2

Answer:

The addition of energy  through the chemical reaction when substance combines and gets decomposed.

Explanation:

Answer:

Heat  gained by 1.25 grams of ice is 250 joules

Explanation:

As we know

[tex]Q = mc\Delta[/tex]T

Where

[tex]\Delta[/tex]T is the change in temperature

Water freezes at 273.15 K/0 degree Celsius, and it boils at 373.15 K/00 degree Celsius,

[tex]\Delta[/tex]T  

m is the mass in grams

c is the specific heat of water (ice) = 2.05 joules/gram

Substituting the given values, we get -

[tex]Q = 1.25 * 2.0 * 100\\Q = 250[/tex]Joules.

Answer:

35.8 g

Explanation:

Step 1: Given data

Mass of water: 63.5 g

Step 2: Calculate how many grams of KCl can be dissolved in 63.5. g of water at 80 °C

Solubility is the maximum amount of solute that can be dissolved in 100 g of solute at a specified temperature. The solubility of KCl at 80 °C is 56.3 g%g, that is, we can dissolve up to 56.3 g of KCl in 100 g of water.

63.5 g Water × 56.3 g KCl/100 g Water = 35.8 g KCl

Answer:

700

Explanation:

How to find

Multiply the volume and pressure and divide the product by the temperature and the molar gas constant to calculate the moles of the hydrogen gas.

Solve: 204.83 × 27.88 / 8.76 = 651.901872146

Which is 651.90

In the nearest hundredths, the moles of gas is 700

Answer:

Hydrogen and Oxygen

Explanation:

Hydrogen atomic mass = 1.008  amu

atomic mass = 15.999  amu

According to the periodic table, two elements whose  atomic mass is less than twice their atomic number are hydrogen and oxygen.

The atomic number of an atom refers to the number of protons in that atom. It serves as an identity for atoms of elements. The atomic mass of element is the weighted average of the masses of all the isotopes of the element.

The atomic number of oxygen is 8 while the atomic number of hydrogen is 1. The atomic mass of oxygen is 15.999 amu while the atomic mass of hydrogen is 1.0008 amu.

We can see that twice the atomic number of oxygen gives sixteen while twice the atomic number of hydrogen gives two. Therefore,  two elements whose  atomic mass is less than twice their atomic number are hydrogen and oxygen.

Learn more: https://brainly.com/question/2673886

Answer:

A precipitation reaction is one in which substances in solution are mixed and an insoluble product is made. The insoluble product is called a precipitate and can be seen as a solid forming in the reaction mixture.

Answer:

250k

I Really This Helps A Little Bit.

Answer:

a) 0.06 mol K₂(CO₃) and 0.07 mol Al(NO₃)₃

b) The limiting reactant is K₂CO₃

c) 0.03 moles of Al₂(CO₃)₃

Explanation:

The balanced reaction between K₂CO₃ and Al(NO₃)₃ is the following:

3 K₂CO₃ + 2 Al(NO₃)₃ → Al₂(CO₃)₃ + 6 KNO₃

(a) We can calculate the moles for each reactant as the product of the molarity (M) and the volume (V) in liters.

K₂(CO₃): M = 2.4 mol/L , V = 25 mL x 1 L/1000 mL = 0.025 L

⇒ moles K₂(CO₃) = M x V = 2.4 mol/L x 0.025 L = 0.06 mol K₂(CO₃)

Al(NO₃)₃: M = 2.0 mol/L , V = 35 mL x 1 L/1000 mL = 0.035 L

⇒ moles Al(NO₃)₃ = M x V = 2.0 mol/L x 0.035 L = 0.07 mol Al(NO₃)₃

(b) According to the balanced equation, the stoichiometric ratio is 3 moles K₂CO₃/2 moles Al(NO₃)₃. We have 0.07 moles of Al(NO₃)₃, so we multiply the moles of Al(NO₃)₃ by the stiochiometric ratio to calculate how many moles of K₂CO₃ are needed:

0.07 mol Al(NO₃)₃ x 3 mol K₂CO₃/2 mol Al(NO₃)₃ = 0.105 moles of K₂CO₃

We need 0.105 moles of K₂CO₃ but we have only 0.06 moles of K₂CO₃. Therefore, the limiting reactant is K₂CO₃.

(c) We use the limiting reactant to calculate how many moles of product (Al₂(CO₃)₃) are formed. According to the equation, 2 moles of K₂CO₃ produce 1 mol of Al₂(CO₃)₃, thus the stoichiometric ratio is 1 mol Al₂(CO₃)₃/2 moles K₂CO₃. We have 0.06 moles of K₂CO₃, so the number of moles of Al₂(CO₃)₃ will be:

0.06 moles K₂CO₃ x 1 mol Al₂(CO₃)₃/2 moles K₂CO₃ = 0.03 moles of Al₂(CO₃)₃

Answer:

[tex]\boxed {\boxed {\sf D. \ Sodium}}[/tex]

Explanation:

Valence electrons are electrons in the outermost shell.

One way to find valence electrons is with the electron configuration. This is often found on the Periodic Table. The last number in this configuration is the number of valence electrons, because an electron configuration shows where  electrons are located and the last number represents the outer shell.

In addition, all group 1 or alkali metals have 1 valence electrons. These include lithium, sodium, potassium, rubidium, cesium, and francium.

Even though we already know it is sodium based on valence electrons, here is an explanation of the reaction ratio.

Since sodium has 1 valence electron, it wants to get rid of it to satisfy the Octet Rule (8 valence electrons). Group 17 elements have 7 valence electrons, so they need 1. The two elements will react in a 1 to 1 ratio because the sodium donates its 1 excess electron to the group 17 element that needs 1.

The element that has 1 valence electron in its outer shell and will react with a group 17 element in a 1:1 ratio is sodium. Therefore, the correct option is option D.

The electrons in an atom's highest energy level, commonly referred to as the valence shell, are called valence electrons. These electrons interact with other atoms and participate in chemical bonds. Alkali metal sodium (Na), which belongs to group 1 of the periodic table, contains one valence electron in its outermost shell. Halogens, or group 17 elements, have 7 valence electrons.

Chlorine (Cl) is a member of group 17 and combines with sodium to generate sodium chloride (NaCl), an ionic compound. One sodium atom contributes its one valence electron to a chlorine atom, creating a stable ionic connection.

Therefore, the correct option is option D.

To know more about valence electron, here:

https://brainly.com/question/31264554

#SPJ6

Explanation:

The particles of matter are continuously in motion due to which tehy collide with each other, and this creates a vibration in the solids

I hope it is correct ☺️

Answer:

The meet

Explanation:

Answer:

The answer is 7.7 ×10¹⁰

Explanation:

7.0 × 10³ × 1.1 × 10⁷

7.7 ×10¹⁰

Thus, The answer is 7.7 ×10¹⁰

-TheUnknownScientist