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4 years ago

How much copper is in 4.64 grams of copper

Chemistry

1 answer:

Romashka [77]4 years ago

6 0

Answer:

4.64 grams.

Explanation:

without stating a desired unit, stating the answer in any unit is acceptable. So you can use grams and the problem is done for you

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When calculating the average atomic mass, which of the following are needed for each isotope? Select all that apply.

Alexeev081 [22]

Answer:

number of protons, mass and atomic number

Explanation:

7 0

3 years ago

Which liquid would be the most difficult to raise or lower the temperature of

scoundrel [369]

Answer:

its either A or D

H0p3 th1$ H3lp$

6 0

3 years ago

What is the balanced equation for the reaction of lead (II) nitrate and sodium chloride?

Sindrei [870]

Answer:

Pb(NO3)2+2NaCl \to PbCl2+NaNO3

Explanation:

Lead(II) nitrate is $Pb(NO_{3})_{2}$

Sodium Chloride is $NaCl$

This is a double displacement reaction. Hence anions or cations of both the compounds are displaced to form the products.

$Pb^{+2}$ and $Cl^{-}$ combine to form PbCl_{2}$

$Na^{+} and \,NO_{3}^{-} combine\, to\, form\, NaNO_{3}$

Therefore the balanced equation is

$Pb(NO_{3})_{2}(aq)+2NaCl(aq) \to PbCl_{2}(s)+2NaNO_{3}(aq)$

3 0

4 years ago

The practical limit to ages that can be determined by radiocarbon dating is about 41000-yr-old sample, what percentage of the or

Aloiza [94]

Answer:

In percentage, the sample of C-4 remains = 0.7015 %

Explanation:

The Half life Carbon 14 = 5730 year

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac {ln\ 2}{t_{1/2}}$

$k=\frac {ln\ 2}{5730}\ hour^{-1}$

The rate constant, k = 0.000120968 year⁻¹

Time = 41000 years

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

So,

$\frac {[A_t]}{[A_0]}=e^{-0.000120968\times 41000}$

$\frac {[A_t]}{[A_0]}=0.007015$

In percentage, the sample of C-4 remains = 0.7015 %

3 0

3 years ago

PbBr2 + HCI → HBr PbCl2 Balancing chemical reaction

Diano4ka-milaya [45]

Answer:

PbBr2 + 2HCl → 2HBr + PbCl2. Reaction Information. Lead(Ii) Bromide + Hydrogen Chloride = Hydrobromic Acid + Cotunnite. Reaction Type.

Explanation:

hope this helps

4 0

3 years ago