What is matter ????????

Chemistry

2 answers:

choli [55]2 years ago

6 0

Matter is size,color,texture,shape.but your name is not matter.

Debora [2.8K]2 years ago

4 0

Matter is everything and everything is made of matter, everything physical at least

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Copper reacts with silver nitrate through single replacement.

-Dominant- [34]

Answer:

Part a) 0.0104 moles copper(II) nitrate.

Part b)

i) 0.0418 mole Cu

ii) 0.0209 mol Ag NO₃

Explanation:

1) Balanced chemical reaction (single replacement):

In a single replacement reaction a more acitve metal (Cu) replaces a less active metal (Ag)

Cu + 2 Ag NO₃ → Cu (NO₃)₂ + 2 Ag

2) Mole ratio:

1 mole Cu : 2 mole Ag NO₃ : 2 mole Ag

3) Moles of Ag

n = mass in grams / atomic mass
atomic mass of Ag: 107.868 g/mol
n = 2.25 g / 107.868 g/mol = 0.0209 mol Ag

4) Moles of copper(II) nitrate:

Set the proportion using the mole ratio:

2 mole Ag / 1 mole Cu (NO₃)₂ = 0.0209 mole Ag / x

Solve: x = 0.0209 / 2 mole Cu (NO₃)₂ = 0.0104 moles Cu(NO₃)₂

That is the answer of part a: 0.0104 moles copper(II) nitrate.

5) Moles of each reactant

i) Cu:

Set a proportion using the theoretical mole ratio

1 mole Cu / 2 mole Ag = x / 0.0209 mol Ag

Solve for x: x = 0.0209 / 2 mole Cu = 0.0418 mole Cu

ii) Ag NO₃

Set a proportion using the teoretical mole ratio

2 mole Ag NO₃ / 2 mole Ag = x / 0.0209 mole Ag

Solve for x: x = 0.0209 mol Ag NO₃

6 0

3 years ago

Our good friend and pseudo scientist, homer simpson, attempts to analyze 300 mg of an unknown compound containing only c and h b

iragen [17]

$C_{x}H_{y} + O_{2} --\ \textgreater \ x CO_{2} + \frac{y}{2} H{2}O

540mg H_{2}O* \frac{1 mmol H_{2}O}{18 mg H_{2}O} =30 mmol H_{2}O

\\ \\30 mmolH_{2}O -have - 60 mmol H
\\ \\ 60 mmol H* \frac{1mg H}{1 mmol H} =60 mg H
\\ \\300mg C_{x}H_{y} - 60 mg H= 240 mg C
\\ \\ 240 mgC* \frac{1mmol}{12mg} =20 mmol C

20 mmol C: 60 mmol H=1 mol C : 3 mol H

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