3 years ago

Can someone help me complete this chart down below? (READ CAREFULLY)

Chemistry

1 answer:

icang [17]3 years ago

3 0

Answer:

the last one

Explanation:positive

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When silver coins are found in ancient shipwrecks,they are coated with a black crust. What question could you ask to help you de

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It went under a physical change because it (1) changed color. (2) changed form.

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2 years ago

Calculate the number of moles of C2H6 (nC2H6) in 1.80×1023 molecules of C2H6.

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1481.40 molecules of C2H6

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When a chemical reaction occurs what happens to the properties of the substance

Talja [164]

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2 years ago

Cu + 2AgNO3 → Cu(NO3)2 + 2Ag

Eva8 [605]

Answer:

$m_{Ag}=135.8gAg$

$Y=88.4\%$

Explanation:

Hello there!

In this case, according to the described chemical reaction, it is possible to compute the theoretical mass of silver as mass via the 1:2 mole ratio of copper to silver and their atomic mass in the periodic table, in order to perform the following stoichiometric setup:

$m_{Ag}=40.gCu*\frac{1molCu}{63.55gCu}*\frac{2molAg}{1molCu}*\frac{107.87gAg}{1molAg}\\\\ m_{Ag}=135.8gAg$

Next, given the actual yield of 120 g, we compute the percent yield via:

$Y=\frac{120g}{135.8g}*100\%\\\\Y=88.4\%$

Regards!

4 0

2 years ago

Re-order each list of elements in the table below, if necessary, so that the elements are listed in order of decreasing electron

Artyom0805 [142]

Answer:

O, S, Te

Cl, Br, Se

Explanation:

Main group elements have an electronegativity that increases across a period (from left to right) and decreases down a group.

Each atom has its own value which you can find on the electronegativity chart.

Metals have low values

Nonmetals have high values

I'm your case:

O = 3.5

S = 2.5

Te = 2.1

Cl = 3.0

Br = 2.8

Se = 2.4

3 0

2 years ago