All categories

3 years ago

Which group has different numbers of valence electrons

Chemistry

1 answer:

shusha [124]3 years ago

3 0

Answer:

where are the group?

Explanation:

You might be interested in

Which of the following is an example of positive acceleration? Q A boy running from his house around the block and ending up bac

Natalija [7]

The answer is A track star speeding up as he sprints to the finish line.

8 0

3 years ago

Help me pleaseee. ty if you dooo :))

Lina20 [59]

$\huge \fcolorbox{black}{red}{♛answer♛}$

Hydrogen Fluoride / HF

$\huge\sf\underline{\underline{\red{❥︎ Thanks}}}$

3 0

2 years ago

3. How much power is required to pull a sled if you use<br>60j of work in secound?<br>

JulijaS [17]

Answer:

The answer is 60W

Power = Work done/ time

time = 1 second

Work done = 60J

Power = 60/1

= 60W

Hope this helps.

3 0

2 years ago

son4ous [18]

Answer: The molar enthalpy change is 73.04 kJ/mol

Explanation:

$HCl+NaOH\rightarrow NaCl+H_2O$

moles of HCl= $molarity\times {\text {vol in L}}=0.415mol/L\times 0.1=0.0415mol$

As NaOH is in excess 0.0415 moles of HCl reacts with 0.0415 moles of NaOH.

volume of water = 100.0 ml + 50.0 ml = 150.0 ml

density of water = 1.0 g/ml

mass of water = $volume \times density=150.0ml\times 1.0g/ml=150.0g$

$q=m\times c\times \Delta T$

q = heat released

m = mass = 150.0 g

c = specific heat = $4.184J/g^0C$

$\Delta T$ = change in temperature = $4.83^0C$

$q=150.0\times 4.184\times 4.83$

$q=3031.3J$

Thus 0.0415 mol of HCl produces heat = 3031.3 J

1 mol of HCL produces heat = $\frac{3031.3}{0.0415}\times 1=73043.3J=73.04kJ$

Thus molar enthalpy change is 73.04 kJ/mol

8 0

2 years ago

Combustion of Methane Endothermic or Exothermic?

Misha Larkins [42]

Idk. Idk. Idk. Idk.

7 0

2 years ago