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4 years ago

How many atoms are in lead ii bicarbonate

Chemistry

1 answer:

sertanlavr [38]4 years ago

4 0

Answer:

11 atoms

Explanation:

The formula for lead(II) bicarbonate is: Pb(HCO3)2.

Atoms in Pb(HCO3)2:

Pb=1, H=1×2, C=1×2, O=3×2

1+1×2+1×2+3×2

=1+2+2+6

=11 atoms

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nadya68 [22]

Answer:

$2.82\cdot 10^9 y$

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For a radioactive isotope, the amount of substance left after a certain time t is:

$m(t)=m_0 (\frac{1}{2})^{\frac{t}{\tau}}$ (1)

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m(t) is the mass of the substance at time t

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In this problem, the isotope is uranium-235, which has a half-life of

$\tau=7.04\cdot 10^8 y$

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$\frac{m(t)}{m_0}=\frac{6.25}{100}$

Substituting into (1) and solving for t, we can find how much time has passed:

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4 years ago

A student placed 10.5 g of glucose (C6H12O6) in a volumetric fla. heggsk, added enough water to dissolve the glucose by swirling

aniked [119]

<u>Answer:</u> The mass of glucose in final solution is 0.420 grams

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

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$M_2\text{ and }V_2$ are the molarity and volume of diluted glucose solution

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How many atoms are in lead ii bicarbonate​

How many atoms are in lead ii bicarbonate