1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Readme [11.4K]
2 years ago
14

Mass in grams of 4.25 × 10³ mol of N2?

Chemistry
1 answer:
Lesechka [4]2 years ago
7 0

Answer:

From the periodic table: mass of nitrogen = 14 grams. This means that: molar mass of N2 = 2*14 = 28 grams. Now, number of moles can be calculated using the following rule: number of moles = mass / molar mass. Therefore: mass = number of moles * molar mass. mass = 4.25*10^3 * 28.

Explanation:

You might be interested in
What is the state of the substance at room temperature (20°c)
soldier1979 [14.2K]

Answer:

dez nuts. the forth quauter in ur girls buttr

5 0
3 years ago
Two basic properties of the liquid phase
melamori03 [73]
Fixed density
Particles move smoothly

6 0
3 years ago
When the following equation is balanced using the smallest possible integers, what is the coefficent of oxygen gas?
elena55 [62]

By balancing a chemical reaction, you must first balance the atom that is in smaller amount in the chemical species that you have in the reaction. In the combustion reaction presented in the question that atom is carbon (C). Therefore, the first thing to do is multiply the CO2 by 7, since those are the carbon atoms that are in the C7H16O. The reaction would be like this,

C7H16O + O2  →  7CO2 + H2O

You can make a table of the amount of atoms of C, H and O that you have in the reagents and products after you put a coefficient 7 in front of the CO2, in the following way,

R P

C 7 7

H 16 2

O 3 15

Then you balance the hydrogens. It is better that you leave the last oxygens since there is an oxygen molecule alone, so when adding a coefficient to balance it, the quantities of the rest of the atoms in the equation would not be altered.

To balance the hydrogens you add an 8 in front of the H2O molecule in the reagents, since there are 16 hydrogens in the molecule C7H16O and

8H x 2H = 16H.

The reaction and the table would be like this,

C7H16O + O2  →  7CO2 + 8H2O

R P

C 7 7

H 16 16

O 3 22

Finally, you balance the atoms of O. To do this, you add a coefficient of 21/2 to the O2 molecule, this is because (21/2) x2 = 21 and 21 O coming from the O2 molecule plus an O coming from the C7H16O molecule gives a total of 22 O, which are equal to the amount of O we have in the products.

C7H16O + (21/2)O2  →  7CO2 + 8H2O

To bring the coefficients of the reactants and the products to whole numbers multiply all the coefficients by 2. Then the reaction is like,

2 C7H16O + 21O2  →  14CO2 + 16H2O

As you can see when the given reaction is balanced using the smallest possible integers, the coefficent of oxygen gas is 21

6 0
3 years ago
Like all equilibrium constants, the value of Kw depends on temperature. At body temperature (37°C), Kw = 2.4 * 10-14. What are t
Aleksandr [31]

Answer:

pH = 6.8124

Explanation:

We know pH decreases with increase in temperature.

At room temperature i.e. 25⁰c pH of pure water is equal to 7

We know

Kw = [H⁺][OH⁻]...............(1)

where Kw = water dissociation constant

At equilibrium [H⁺] = [OH⁻]

So at 37⁰c i.e body temperature Kw = 2.4 × 10⁻¹⁴

From equation (1)

[H⁺]² = 2.4 × 10⁻¹⁴

[H⁺] = √2.4 × 10⁻¹⁴

[H⁺] = 1.54 × 10⁻⁷

pH  = - log[H⁺]

      = - log{1.54 × 10⁻⁷}

      = 6.812

5 0
2 years ago
Select the words that correctly fill in the blanks for this statement:
Lera25 [3.4K]

The correct answer is option A. Three, dumbbell.

The p sublevel has __three_orbitals that are _dunmbbell_-shaped.

The three orbitals of the p sublevel are oriented in three directions along the x, y and Z axis. The orbitals are called px, py and pz. Each p orbital can have a maximum of 2 electrons. Since there are three p orbitals, the p sublevel can have a maximum of 6 electrons.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which number indicates the energy level of an atom's valence electrons? answers?
    7·2 answers
  • Which best describes the transfer of heat energy through conduction? A. Heat energy is transferred from molecule to molecule by
    8·1 answer
  • An experiment calls for you to use 100 mL of 0.25 M HNO3 solution. All you have available is a bottle of 3.4 M HNO3. How many mi
    6·1 answer
  • What are the common uses of acetone and formalin?
    13·2 answers
  • How can one kg of iron melt more ice than 1 kg lead at 100 °C
    5·1 answer
  • What does nm measure in the spectra?
    13·2 answers
  • The equation h3po4 + 3koh →k3po4 + 3h2o is an example of which type of reaction?
    7·1 answer
  • Can someone help me on this
    5·1 answer
  • 15. Mass = 25g<br> Start: 45mL<br> Final: 50mL<br> • What is the Volume?<br> • What is the Density?
    13·1 answer
  • The gain of electrons by an element or ion in a reaction is called __.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!