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erica [24]
3 years ago
12

When Acid is added to the buffer, base within the buffer reacts with added

Chemistry
1 answer:
LuckyWell [14K]3 years ago
3 0
F A L S E yeyeyeyeyye
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So i need help on this
ASHA 777 [7]

Answer:

The dependent variable: population of birds

Explanation:

Its D because Dependent means what were collecting data of and we know we need to collect data from the population of birds.

Hope this helps :3

6 0
3 years ago
When 1.550 g of liquid hexane (C6H14) undergoes combustion in a bomb calorimeter, the temperature rises from 25.87∘C to 38.13∘C.
AlladinOne [14]

Explanation:

1). The given data is as follows.

       T_{i} = 25.87^{o}C,      T_{f} = 38.13^{o}C

               C = 5.73 kJ/^{o}C

Hence, calculate the change in enthalpy of the reaction as follows.

      \Delta E_{rxn} = -C \times \Delta T

                     = -5.73 \times (38.13 - 25.87)^{o}C

                     = -70.25 KJ

As,  number of moles = \frac{mass}{\text{molar mass}}

                                    = \frac{1.55}{(6 \times 12 + 14 \times 1)}

                                    = 0.018 mol

Therefore, enthalpy of reaction in kJ/mol hexane is as follows.

            \Delta E_{rxn} = \frac{-70.25 KJ}{0.018 mol}

                          = -3.90 \times 10^{3} kJ/mol

Thus, we can conclude that \Delta E_{rxn} for the reaction in kJ/mol hexane is -3.90 \times 10^{3} kJ/mol .

2).  As we know that,

     Number of moles = \frac{mass}{\text{molar mass}}

                                  = \frac{1.55}{(7 \times 12 + 8 \times 1)}

                                   = 0.017 mol

       \Delta E_{rxn} = \E_{rxn} per mol \times \text{number of moles}

                      = -3.91 \times 10^{3} \times 0.017

                      = -65.875 kJ

As,    \Delta E_{rxn} = C \times \Delta T


                    -65.875 kJ = -C \times (37.57 - 23.12)^{o}C

                           C = 4.56 kJ/^{o}C

Hence, heat capacity of the bomb calorimeter is 4.56 kJ/^{o}C.

3 0
4 years ago
Which of the following measurements is expressed to three significant figures?
IRINA_888 [86]

we need the three measurements to be able to asses significant figures.

3 0
4 years ago
Read 2 more answers
Identify the elements that have the following electron configurations:<br> 1s²2s²2p⁶3s²3p⁶3d⁷4s² *
Leto [7]
That would be calcium (Ca)
6 0
3 years ago
At a temperature of 393 K, the pressure of a sample of nitrogen is 1.07 atm. What will the pressure be at a temperature of 478 K
Rainbow [258]

Answer:

1.30atm

Explanation:

P1/T1 = P2/T2

1.07/393 = P2/478

6 0
4 years ago
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