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Annette [7]
3 years ago
13

Which pairs will form an ionic bond (Can pick multiple answers)​

Chemistry
1 answer:
boyakko [2]3 years ago
8 0

Answer: NA and F would form an ionic bond

Hope this helps pls if there is any other feel free to comment

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Some velomobile seats have been designed to hold ice packs inside their cushions. If you started a ride with ice packs that held
Cerrena [4.2K]

Answer : The heat energy absorbed will be, 1.23\times 10^5cal

Solution :

The process involved in this problem are :

(1):H_2O(s)(0^oC)\rightarrow H_2O(l)(0^oC)\\\\(2):H_2O(l)(0^oC)\rightarrow H_2O(l)(32.0^oC)

The expression used will be:

\Delta H=m\times \Delta H_{fusion}+[m\times c_{p,l}\times (T_{final}-T_{initial})]

where,

m = mass of ice = 1100 g

c_{p,l} = specific heat of liquid water = 4.18J/g^oC

\Delta H_{fusion} = enthalpy change for fusion = 6.01kJ/mole=6010J/mole=\frac{6010J/mole}{18g/mole}J/g=333.89J/g

Molar mass of water = 18 g/mole

Now put all the given values in the above expression, we get:

\Delta H=1100g\times 333.89J/g+[1100g\times 4.18J/g^oC\times (32.0-0)^oC]

\Delta H=514415J=122948.1358cal=1.23\times 10^5cal

Conversion used : (1 cal = 4.184 J)

Therefore, the heat energy absorbed will be, 1.23\times 10^5cal

7 0
3 years ago
If objects with a greater mass have greater gravitational pull, why is our solar
STatiana [176]

Answer:

It's too far away

Explanation:

According to classical mechanics, gravitational pull is inversely proportional to the distance squared; as the distance increases, the gravitational pull decreases at a faster and faster rate. Since Alpha Centauri A is a few lightyears (Tens of trillions of kilometers away), without even needing to calculate the force of gravity, it is very miniscule.

6 0
3 years ago
HELP FAST!<br><br> 35 POINTS!<br><br> Why is flammability a chemical property?
Pavlova-9 [17]
Flammmability is a chemical change because it changes the composition of the object. the product is very different from the rectant.
8 0
3 years ago
What best describes the battery in this picture? an electrolytic cell that has spontaneous half reactions
nasty-shy [4]

ok im not full sure man but i would say multiple voltaic cells that have spontaneous half reactions


     



                                          im sorry hope it helps

5 0
3 years ago
Read 2 more answers
What volume of solution must be added to 4.0 mol of NaCl to make a 1.2 M solution?
Aleksandr [31]

Answer:

\boxed {\boxed {\sf 3.3 \ liters}}}

Explanation:

Molarity is a measure of concentration in moles per liter.

molarity=\frac{moles \ of \ solute}{liters \ of \ solution}}

The solution has a molarity of 1.2 M or 1.2 moles per liter. There are 4.0 moles of NaCl, the solute. We don't know the liters of solution, so we can use x.

  • molarity= 1.2 mol/L
  • moles of solute= 4.0 mol
  • liters of solution =x

Substitute the values into the formula.

1.2 \ mol/L = \frac{4.0 \ mol}{x}

Since we are solving for x, we must isolate the variable. Begin by cross multiply (multiply the 1st numerator and 2nd denominator, then the 1st denominator and 2nd numerator.

\frac {1.2 \ mol/L}{1}=\frac{ 4.0 \ mol}{x}

4.0 \ mol *1=1.2 \ mol/L *x

4.0 \ mol = 1.2 \ mol/L *x

x is being multiplied by 1.2 moles per liter. The inverse of multiplication is division, so divide both sides by 1.2 mol/L

\frac{4.0 \ mol}{1.2 \ mol/L} = \frac{1.2 \ mol/L *x}{1.2 \ mol/L}

\frac{4.0 \ mol}{1.2 \ mol/L}=x

The units of moles (mol) will cancel.

\frac{4.0 }{1.2 } \ L =x

3.33333333 \ L=x

The original measurements both have 2 significant figures, so our answer must have the same. For the number we found, this is the tenths place.

The 3 in the hundredth place tells us to leave the 3 in the tenths place.

3.3 \ L\approx x

Approximately  <u>3.3 liters of solution</u> are needed to make a 1.2 M solution with 4.0 moles of sodium chloride.

7 0
3 years ago
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