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4 years ago

A heat releasing process.

Chemistry

1 answer:

Alisiya [41]4 years ago

8 0

This reaction is called an exothermic reaction.

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If you obtain 3.0 grams of aspirin from an experiment that could make no more than 3.14 grams, what is the percent yield?

Masteriza [31]

Answer:

96%

Explanation:

To find the percent yield, we can use this equation

$\frac{Actual}{Theoretical} *100$

The actual yield of aspirin is 3.0 and the theoretical is 3.14 in this case, so just plug the numbers in.

$\frac{3.0}{3.14} *100\\\\ =96$

Thus the percent yield is 96%

;)

3 0

3 years ago

A canister has a fixed volume. If the pressure of the cannister is 1.5 atm at 25 Celsius, what is the new pressure if the temper

scoray [572]

Answer:

d) 1.8 atm

Explanation:

According to Boyle's Law,

P₁/T₁ = P₂/T₂

Here, we are given :

P₁ = 1.5 atm
T₁ = 25°C = 298 K
T₂ = 75°C = 348 K

Solving

P₂ = P₁T₂/T₁
P₂ = 1.5 x 348 / 298
P₂ = 522/298
P₂ = 1.8 atm (approximately)

3 0

2 years ago

Write the complete ionic equation for the reaction that takes place when aqueous solutions of strontium hydroxide and lithium ph

Nesterboy [21]

Answer : The net ionic equation will be,

$3Sr^{2+}(aq)+2PO_4^{3-}(aq)\rightarrow Sr_3(PO_4)_2(s)$

Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The given balanced ionic equation will be,

$3Sr(OH)_2(aq)+2Li_3PO_4(aq)\rightarrow 6LiOH(aq)+Sr_3(PO_4)_2(s)$

The ionic equation in separated aqueous solution will be,

$3Sr^{2+}(aq)+6OH^{-}(aq)+6Li^{+}(aq)+2PO_4^{3-}(aq)\rightarrow Sr_3(PO_4)_2(s)+6Li^+(aq)+6OH^{-}(aq)$

In this equation, $Li^+\text{ and }OH^-$ are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

$3Sr^{2+}(aq)+2PO_4^{3-}(aq)\rightarrow Sr_3(PO_4)_2(s)$

4 0

3 years ago

How many grams of CrSO3 are in 2.4 moles of CrSO3

castortr0y [4]

Answer: 316.8 g CrSO3

Explanation: Solution:

2.4 moles CrSO3 x 132 g CrSO3 / 1 mole CrSO3 = 316.8 g CrSO4

The conversion factor is 1 mole of CrSO4 is equal to its molar mass which is 132 g CrSO3

4 0

3 years ago

Can someone tell me how to identify the number of significant figures?

igor_vitrenko [27]

Answer:

Non-zero digits are always significant.

Any zeros between two significant digits are significant.

A final zero or trailing zeros in the decimal portion ONLY are significant. If a number ends in zeros to the right of the decimal point, those zeros are significant.

Explanation:

1.138 has 4 significant figures, which are 1, 1, 3 and 8. The numbers after the decimal point are decimals and are significant figures.

8 0

3 years ago