Here is a chemical formula 3CO2 to the coefficient in the formula is

Balance the following equations:

Brilliant_brown [7]

Answer:

1) 0 C2H4O2 + 0 O2 -> 0 CO2 + 0 H2O (balanced)

2) V2O5 + CaS -> CaO + V2S5

just additional info: V2O5 is divanadium pentaoxide

LHS (Left hand side)

V: 2

O: 5

Ca: 1

S: 1 x 5 [to balance with the right hand side of the equation]

RHS (Right hand side)

V: 2

O: 1 x 5 [to balance with the left hand side of the equation]

Ca: 1

S: 5

When you balance any elements, you have to balance the whole chemical compound.

Thus,

V2O5 + 5 CaS -> 5 CaO + V2S5

LHS CHECK:

V: 2

O: 5

Ca: 5

S: 5

RHS CHECK:

V: 2

O: 5

Ca: 5

S: 5

3) S8 + O2 -> SO2

LHS:

S: 8

O: 2

RHS:

S: 1 x 8 [to balance with LHS]

O: 2

When you balance any elements, you have to balance the whole chemical compound.

S8 + O2 -> 8 SO2

When we add 8 to the RHS, it gives us 8S, 16 O.

In order to balance that into the RHS, I need to multiply the O2 by 8, which will give 8(O2) = 16 O particles.

Therefore, S8 + 8 O2 -> 8 SO2 is the final answer for (3).

6 0

3 years ago

In a coffee-cup calorimeter, 150.0 mL of 0.50 M HCl is added to 50.0 mL of 1.00 M NaOH to make 200.0 g solution at an initial te

Zigmanuir [339]

Answer:

51.54°C the final temperature of the calorimeter contents.

Explanation:

$HCl+NaOH\rightarrow H_2O+NaCl,\Delta H=-56 kJ/mol$

$moles=Molarity\times Volume (L)$

Molarity of HCl= 0.50 M

Volume of HCl= 150.0 mL = 0.150 L

Moles of HCl= n

$n=0.50 M\times 0.150 L=0.075 mol$

Molarity of NaOH= 1.00 M

Volume of NaOH= 50.0 mL = 0.050 L

Moles of NaOH= n'

$n'=1.00 M\times 0.050 L=0.050 mol$

Since moles of NaOH are less than than moles of HCl. so energy release will be for neutralization of 0.050 moles of naOH by 0.050 moles of HCl.

n = 0.050

$-56 kJ/mol=-\frac{Q}{n}$

$Q=56 kJ/mol\times 0.050 kJ/mol=2.8 kJ=2800 J$

(1 kJ= 1000 J)

The energy change released during the reaction = 2800 J

Volume of solution = 150.0 mL + 50.0 mL = 200.0 mL

Density of the solution (water) = 1.00g/mL

Mass of the solution , m= 200 mL × 1.00 g/mL = 200 g

Now , calculate the final temperature by the solution from :

$q=mc\times (T_{final}-T_{initial})$

where,

q = heat gained = 2800 J

c = specific heat of solution = $4.184 J/^oC$

$T_{final}$ = final temperature = $?$

$T_{initial}$ = initial temperature = $48.2^oC$

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

$2800 J=200.0 g\times 4.184 J/^oC\times (T_{final}-48.2)^oC$

$T_{final}= 51.54^oC$

51.54°C the final temperature of the calorimeter contents.

7 0

3 years ago

Burning a candle is a combustion reaction that uses wax and oxygen to produce carbon dioxide, water, and energy. When you burn a

Elden [556K]

Answer:

Wax

Explanation:

3 0

3 years ago

Which property best indicates that a compound contains an ionic bond?

notka56 [123]

Ionic bond is characterized by the complete transfer of valence electrons between atoms. In this kind of bond, a metal loses its electron in order to become a cation while the nonmetal accept the electron resulting to an anion.

3 0

4 years ago

Find the total mass of three diamonds that have masses of 14.2 grams, 8.73 grams, and 0.912 gram

GaryK [48]

The total mass means that you need to add up all three diamonds' mass. So the calculation equation is 14.2+8.73+0.912 = 23.842 g.

7 0

3 years ago