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Ksivusya [100]
4 years ago
13

True or false reactants are located on the right side of a chemical equation?

Chemistry
1 answer:
poizon [28]4 years ago
4 0

Answer:

False

Explanation:

Reactants are starting materials and are hence located at the left hand side of the equation while products are located at the right hand side.

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Choose all the answers that apply.
Zigmanuir [339]

Answer: The answers are the first and third options.

7 0
3 years ago
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A buffer solution contains 0.496 M KHCO3 and 0.340 M K2CO3. If 0.0585 moles of potassium hydroxide are added to 250. mL of this
aev [14]

Answer:

pH = 10.9

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to say that the undergoing reaction between this buffer and OH⁻ promotes the formation of more CO₃²⁻ because it acts as the base, we can do the following:

n_{CO_3^{2-}}=0.34mol/L*0.250L+0.0585mol=0.1435mol\\\\n_{HCO_3^{-}}=0.34mol/L*0.250L-0.0585mol=0.0265mol

The resulting concentrations are:

[CO_3^{2-}]=\frac{0.1435mol}{0.25L}=0.574M \\

[HCO_3^{-}]=\frac{0.0265mol}{0.25L}=0.106M

Thus, since the pKa of this buffer system is 10.2, the change in the pH would be:

pH=10.2+log(\frac{0.574M}{0.106M} )\\\\pH=10.9

Which makes sense since basic OH⁻ ions were added.

Regards!

6 0
4 years ago
Which symbol represents an alkaline earth element ? A. Na B. Mg C. Ne D. Ag
AfilCa [17]
D. hope this helps your question


8 0
3 years ago
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Why do organisms evolve?
Mekhanik [1.2K]

Answer:B

Explanation:

Natural Selection

5 0
3 years ago
What do the elements in each pair have in common? k, kr be, mg ni, tc b, ge al, pb?
tensa zangetsu [6.8K]
The pairs are:
K, Kr - Same period
Be, Mg - Same group
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