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Allushta [10]
2 years ago
11

How many words can u type in a min

Chemistry
1 answer:
Cerrena [4.2K]2 years ago
5 0

Answer:

It depends on the person, however it is 40 words per minute, or WPM.

Explanation:

Take a typing test. However, the national average is 40 WPM.

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2. When heated above 500 ºC, potassium nitrate decomposes according to the equation below. 4KNO3 2K2O + 2N2 + 5O2A.If oxygen is
AysviL [449]

Answer:

(a) The rate of formation of K2O is 0.12 M/s.

The rate of formation of N2 is also 0.12 M/s

(b) The rate of decomposition of KNO3 is 0.24 M/s

Explanation:

(a) From the equation of reaction, the mole ratio of K2O to O2 is 2:5.

Rate of formation of O2 is 0.3 M/s

Therefore, rate of formation of K2O = (2×0.3/5) = 0.12 M/s

Also from the equation of reaction, mole ratio of N2 to O2 is 2:5.

Rate of formation of N2 = (2×0.3/5) = 0.12 M/s

(b) From the equation of reaction, mole ratio of KNO3 to O2 is 4:5.

Therefore, rate of decomposition of KNO3 = (4×0.3/5) = 0.24 M/s

3 0
2 years ago
How many milliliters of 3.0 M H2SO4 are needed to make 450 mL of 0.10 M H2SO4?
never [62]

Answer:  97.2223 ml

Explanation:

The rule that we will use to solve this problem is:

M2*V1 = M2*V2 where:

M1 is the initial concentration = 3.5 m

V1 is the initial volume = 0.25 l = 250 ml

M2 is the final concentration = 9 m

V2 is the final volume that we need to find

Substitute with the givens in the above equation to get V2 as follows:

3.5*250 = 9*V2

V2 = <em><u>97.2223 ml</u></em>

3 0
2 years ago
Read 2 more answers
Round off 0.0008769 to three significant digits.
garik1379 [7]
8.769 x 10^-4
it will be your answer
6 0
2 years ago
If 31.8 grams of LiCl are dissolved in 225 grams of water, what is the concentration of the solution in percent by mass?
SVEN [57.7K]
  <span>31.8/(31.8+225) *100 = 5.86% 


12 moles * 22.4 L/[email protected]= 26.9 L</span>
5 0
2 years ago
Which compound would you expect to have greater surface tension, acetone [(ch3)2co] or water (h2o) ?
kenny6666 [7]

Surface tension increases by increasing the intermolecular forces.

<h3>What is intermolecular forces?</h3>

The electromagnetic forces of attraction or repulsion that act between atoms and other types of nearby particles, such as atoms or ions, are examples of intermolecular forces (IMFs), also known as secondary forces.

Between molecules, intermolecular forces are at work. In contrast, molecules themselves exert intramolecular pressures. In comparison to intramolecular forces, intermolecular forces are weaker. Intermolecular forces include things like the London dispersion force, dipole-dipole interaction, ion-dipole interaction, and van der Waals forces.

Intermolecular forces come in five flavors: ion-induced dipole forces, dipole-induced dipole forces, induced dipole forces, and dipole-dipole forces. Ions and polar (dipole) molecules are held together by ion-dipole forces.

To learn more about intermolecular forces from the given link:

brainly.com/question/9007693

#SPJ4

5 0
1 year ago
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