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Alika [10]
4 years ago
9

How many total oxygen atoms are in lead (II) nitrate? * Pb(NO3)2

Chemistry
1 answer:
inna [77]4 years ago
3 0
One lead atom, two nitrogen atoms, four oxygen atoms.
You might be interested in
How does an atom differ from a molecule?
blagie [28]

Answer:

A molecule is a bunch of atoms combined.

An atom is the smallest part of an element, that you can get without splitting the nucleus of the atom.

Molecules are made of more two or more atoms joined together. The atoms can be same or different elements. A single molecule is the smallest piece of matter you can have without changing its properties.

Explanation:

5 0
4 years ago
Calculate the volume of 8.87×10-2 M calcium hydroxide required to neutralize 15.0 mL of a 0.389 M hydrobromic acid solution. mL
Arte-miy333 [17]

Answer : The volume of calcium hydroxide is, 32.89 ml

Explanation :

Using neutralization law,

n_1M_1V_1=n_2M_2V_2

where,

n_1 = basicity of an acid = 1

n_2 = acidity of a base = 2

M_1 = concentration of hydrobromic acid = 0.389 M

M_2 = concentration of calcium hydroxide = 0.0887 M

V_1 = volume of hydrobromic acid = 15 ml

V_2 = volume of calcium hydroxide = ?

Now put all the given values in the above law, we get the volume of calcium hydroxide.

1\times 0.389M\times 15ml=2\times 0.0887M\times V_2

V_2=32.89ml

Therefore, the volume of calcium hydroxide is, 32.89 ml

7 0
3 years ago
Which of the following substances has been determined to pose the most significant potential threat to human health in terms of
qwelly [4]

Answer:

Polycyclic aromatic hydrocarbons (from petroleum)

Explanation:

Polycyclic aromatic hydrocarbons (PAH) is a group of compounds which contain more than one aromatic ring. Typically examples include; naphthalene, anthracene, phenanthrene etc.

PAH are present in petroleum products. Almost everyone is regularly exposed to vehicles or other equipments that uses petroleum products as fuel. PAH is usually released from the combustion engine of these equipments and may be inhaled by humans. Thus there is a very high risk of PAH exposure compared to other items listed in the question.

PAHs are known to cause different kinds of cancer and other types of health issues in the body. The most disturbing toxicity of PAH is its carcinogenicity which makes it a very serious potential health risk for humans exposed to it on regular basis.

6 0
3 years ago
During chemical reactions the bonds between atoms break and new bonds form.
Elis [28]

Answer:

The equation is CuCO₃ ⇆ CuO + CO₂. So it's a decomposition reaction, so a solid broke down into two other substances. This means that bonds were broken, so the reaction must be <u>endothermic.</u>

5 0
4 years ago
Consider this reaction: KOH +HBr KBr + H2O Which statement is most likely true about HBr? O It turns blue litmus red O It reacts
vaieri [72.5K]

Answer:

It turns blue litmus red

Explanation:

Acids change blue litmus, which is an ink extracted from lichens, to red, and become less acidic when mixed with bases.

4 0
4 years ago
Read 2 more answers
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