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GenaCL600 [577]
3 years ago
14

What's the name for Pb(NO3)2?

Chemistry
1 answer:
Vlad1618 [11]3 years ago
5 0

Answer:

lead ii nitrate is the answer

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What type of reaction is illustrated?
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Explanation:

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2 years ago
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2. Use the Henderson-Hasselbalch equation to estimate the pH of a buffer solution that is composed of 20 mL of 10 M sodium forma
Mkey [24]

Answer:

pH of buffer =4.75

Explanation:

The pH of buffer solution is calculated using Henderson Hassalbalch's equation:

pH=pKa+log[\frac{[salt]}{[acid]}

Given:

pKa = 3.75

concentration of acid = concentration of formic acid = 1 M

concentration of salt =  concentration of sodium formate = 10 M

pH=3.75+log[\frac{10}{1}]=3.75+1=4.75

pH of buffer =4.75

7 0
3 years ago
Why must each atom of an element always have the same number of protons?
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Atoms do not always contain the same number of electrons and protons, although this state is common. When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral. In contrast, when an atom loses or gains an electron (or the rarer case of losing or gaining a proton, which requires a nuclear reaction), the total charges add up to something other than zero.
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3 years ago
A gas occupies a volume of 160 ml at 36° C and 970mm Hg. What is the volume at STP?
igor_vitrenko [27]

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I'm sorry I just need points

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Which rock type is an example of igneous glass?
irinina [24]

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obsidian

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because it is an igneous rock which is smooth

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