3 years ago

Question 1

Chemistry

1 answer:

slamgirl [31]3 years ago

7 0

Answer:

Fossil record

Explanation:

but first think about it befor you do so it could be wrong im not a computer

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12) _Na+ _H2O → ___ NaOH + __H2

TEA [102]

Answer:

Explanation:

2 Na+ 2 H2O → 2 NaOH + 1 H2

4 0

3 years ago

The boiling point of ethanol is 78.4 °C, and the enthalpy change for the conversion of liquid to vapor is ΔHvap = 38.56 kJ/mol.

Lady_Fox [76]

Explanation:

The given data is as follows.

Enthalpy of vaporization, $\Delta H_{vap}$ = 38.56 kJ/mol

Temperature (T) = $78.4^{o}C$

= (78.4 + 273) K

= 351.4 K

Now, we will calculate the change in entropy using the formula as follows.

$\Delta H_{vap} = T \Delta S_{vap}$

$\Delta S_{vap} = \frac{\Delta H_{vap}}{T}$

= $\frac{38.56 kJ/mol}{351.4 K}$

= 0.109 kJ/mol K

Thus, w ecan conclude that the entropy change for vaporization is 0.109 kJ/mol K.

3 0

4 years ago

The Mass of the paper before being bumed is 50% how much mass should there be after

neonofarm [45]

Explanation:

IF YOU BURNED THE PAPER THERE WILL BE ONLY ASHES

3 0

2 years ago

The force applied to a machine by a users is called the

Andrej [43]

Answer:

When you use a machine, you apply force to the machine. This force is called the input force. The machine, in turn, applies force to an object. This force is called the output force.

7 0

3 years ago

Read 2 more answers

Can you explain what happens to resistance when voltage is increased?

Novay_Z [31]

Resistance is directly proportional to voltage so when you increase Voltage resistance will also increase in order to keep the rate of flow of charge (current) constant

Hope this helps!

4 0

3 years ago