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konstantin123 [22]

3 years ago

10

PLS help

2 answers:

Pani-rosa [81]3 years ago

6 0

Answer:

Sc2O5

Explanation:

We must first consider the relative valencies of the elements. Recall that the formulae of the compound must involve an exchange in the valencies of the two combining species. Hence the first step in solving the problem must be to put down the individual valencies of the both elements then exchange thief valencies to obtain the actual formula of the compound formed by a combination of the both species as we shall show below;

Oxygen=2

Scandium= 5

When the both exchange their valencies

Scandium= 2

Oxygen=5

Hence the formula of the compound will be Sc2O5

viktelen [127]3 years ago

3 0

Answer:

d . Sc2O5

Explanation:

Hello,

In this case, when forming oxides from a metal and oxygen, for us to find out each element's subscript, we must exchange them as shown below, considering +5 for scandium:

$Sc^{+5}_2O^{-2}_5$

For that reason, the answer is d . Sc2O5

Best regards.

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kiruha [24]

Answer:

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(b) The tank will become clogged in 24 minutes.

Explanation:

The rate of accumulation of the pulp stock can be defined as

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In this case, Co is 0, because the exit flow is only water and 0% fiber.

$frac{dC}{dt}=Q_{i}*C_{i}-Q_{o}*0=Q_{i}*C_{i}$

Rearranging adn integrating

$dC = (Q_{i}*C_{i})dt\\\int dC = \int (Q_{i}*C_{i})dt\\C=(Q_{i}*C_{i})*t+constant$

At t=0, C=0,

$C=(Q_{i}*C_{i})*t+constant\\0=(Q_{i}*C_{i})*0+constant\\0=constant\\\\C=(Q_{i}*C_{i})*t$

$C=(15*0.01)*t=0.15*t$

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$C=0.15*t\\0.06=0.15*t\\t=0.06/0.15=0.4$

7 0

3 years ago

What objects in your home has chemical and physical properties

NeX [460]

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3 years ago

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netineya [11]

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Convert mass of Mg to moles

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tensa zangetsu [6.8K]

The solution would be like this for this specific problem:

<span>1.0 </span>atm + 2.0 atm + 3.0 atm = 6.0 atm

So the partial pressure of the helium 3.0 atm.

<span>I hope this helps and if you have any further questions, please don’t hesitate to ask again.</span>

5 0

3 years ago

A 15.0 L tank of gas contained at a high pressure of 8.20 • 10^4 torr. The tank is opened and the gas expands into an empty cham

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Answer:

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P₂ is our incognite

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<em />

4 0

3 years ago