Answer:0.025576559594663 mole.
Explanation:
Answer:
0.40 M HCN and 0.10 KCN
Explanation:
A buffer solution is defined as the aqueous mixture of a weak base and its conjugate base or vice versa.
For the systems:
0.10 M KCN 0.20 M CH3COOH: Acetic acid, CH₃COOH is a weak acid and KCN is the conjugate base of HCN. Here, you have a weak acid and a conjugate base but not the conjugate base of the acetic acid or the weak acid of KCN. Thus, <em>it is not a buffer.</em>
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1.0 M HNO3 and 1.0 M NaNO3. HNO₃ is a strong acid. Thus, this system <em>is not a buffer.</em>
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0.40 M HCN and 0.10 KCN. Here, you have HCN, the weak acid, and KCN, its conjugate base. Thus, <em>it is a buffer.</em>
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0.50 M HCl and 0.10 NaCl. HCl is a strong acid, thus, its mixture with NaCl <em>is not a buffer.</em>
The nucleus of an atom contains protons and neutrons.
Protons have positive charges, neutrons have neutral charges (no charge), and electrons have negative charges. That is why when you determine net charge of atom you only look at the proton to electron ratio since the neutrons don't matter when it comes to charge.
I hope this helps. Let me know in the comments if anything is unclear.<span />
Answer:
0.3477 grams
The conversion factor is 1/1000
Explanation:
347.7 mg = 0.3477 grams
1 mg = 1x10⁻³ g
1 g / 1000 mg . 347.7 mg = 0.3477 grams