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8090 [49]
3 years ago
6

The normal boiling point corresponds to the temperature at which both the liquid and gas are under the standard atmospheric pres

sure of 1 atm.
TRUE

FALSE
Chemistry
1 answer:
ANTONII [103]3 years ago
3 0
TRUE. (Lorenzo Romano Amadeo Carlo Avogadro) Ideal Gas Law that defined as one in which all collisions between atoms or molecules are perfectly elastic in which there are no intermolecular attractive forces.  In such a gas, all the internal energy is the form of kinetic energy and any change in internal energy is accompanied by a change in temperature. That characterized by three state variables: absolute pressure (P) = 1 atm, volume (V) = 22.4 L and absolute temperature (T) = 273 K.
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HELP!? #20 Which type of bond is formed when bases pair in DNA? ionic bond covalent bond coordinate bond hydrogen bond
lesya [120]

hydrogen bond, nucleotides in a base pair complement each other which means their shape allows them to bond together with hydrogen bonds.

3 0
3 years ago
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You have 500.0 ml of a buffer solution containing 0.30 m acetic acid (ch3cooh) and 0.20 m sodium acetate (ch3coona). what will t
Nataly [62]
First, we should get moles acetic acid = molarity * volume

                                                                =0.3 M * 0.5 L

                                                                =  0.15 mol

then, we should get moles acetate = molarity * volume

                                                           = 0.2 M * 0.5L

                                                           = 0.1 mol

then, we have to get moles of OH- which added:

moles OH- = molarity  * volume

                   = 1 M    * 0.02L

                  = 0.02 mol

when the reaction equation is:


                 CH3COOH  +  OH-  → CH3COO-   +  H2O


moles acetic acid after adding OH- = (0.15-0.02) 
                                             
                                                            =  0.13M                                       

moles acetate after adding OH- =  (0.1 + 0.02)

                                                      =   0.12 M

Total volume = 0.5 L + 0.02 L= 0.52 L

∴[acetic acid] = moles acetic acid after adding OH- / total volume

                        = 0.13mol / 0.52L

                       = 0.25 M

and [acetate ) = 0.12 mol / 0.52L
 
                        = 0.23 M

by using H-H equation we can get PH:

PH = Pka + ㏒[salt/acid]

when we have Ka = 1.8 x 10^-5

∴Pka = -㏒Ka 

        = -㏒ 1.8 x 10^-5

       = 4.7

So by substitution:

∴ PH = 4.7 + ㏒[acetate/acetic acid]

         = 4.7 + ㏒(0.23/0.25)

        = 4.66
6 0
3 years ago
H2O2, hydrogen peroxide, naturally breaks down into H2O and O2 over time. MnO2, manganese dioxide, can be used to lower the ener
Lostsunrise [7]

The answer is A because it is a reactant

5 0
3 years ago
Which set of values represents standard pressure and standard temperature?(1) 1 atm and 101.3 K(2) 1 kPa and 273 K(3) 101.3 kPa
yuradex [85]
Standard Temperature and Pressure (STP) is 0 degree Celsius and 1 atm. We also know that 1atm= 101.3 kPa. Thus, set 3 is the best choice.
Hope that would help :))
4 0
3 years ago
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a 1 l container contains 02 gas at stp. If the diameter of the o2 molecule is 3.75 * 10^-10 m the mean free path of the o2 molec
Temka [501]

Answer:

ion know man

Explanation:

just wanted the points

5 0
3 years ago
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