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Yakvenalex [24]

2 years ago

11

What do these red/yellow/orange-precipitate reactions have in common? (choose

1 answer:

aev [14]2 years ago

8 0

Answer:

3 is the correct I think so

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How is the periodic table organized?

joja [24]

Answer:

The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.

Explanation:

8 0

3 years ago

Read 2 more answers

What is the volume, in liters, of 6.8 mol of Kr gas at STP?

Virty [35]

Answer:

$\boxed {\boxed {\sf D. \ 152 \ L}}$

Explanation:

Any gas at standard temperature and pressure (STP) has a volume of 22.4 liters per mole or 22.4 L/mol. We can create a proportion with this value.

$\frac {22.4 \ L \ Kr}{1 \ mol \ Kr}$

Multiply both sides of the equation by 6.8 moles of krypton.

$6.8 \ mol \ Kr *\frac {22.4 \ L \ Kr}{1 \ mol \ Kr}$

The units of moles of krypton will cancel.

$6.8 *\frac {22.4 \ L \ Kr}{1 }$

The denominator of 1 can be ignored, so this becomes a simple multiplication problem.

$68 * 22.4 \ L \ Kr$

$152.32 \ L \ Kr$

If we round to the nearest whole number, the 3 in the tenths place tells us to leave the 2 in the ones place.

$152 \ L \ Kr$

6.8 moles of krypton gas at standard temperature and pressure is equal to <u>152 liters</u>.

6 0

3 years ago

A balloon’s internal pressure is 1.25 atm, and its volume is 2.50 L. If the balloon is taken to the bottom of the ocean (pressur

cricket20 [7]

Where temperature is constant P1V1 = P2V2 where P = pressure and V = volume.

so 1.25 * 2.5 = 95 * V2

V2 = (1.25 * 2.5) / 95

= 0.03 L to the nearest hundredth..

4 0

3 years ago

Read 2 more answers

To balance a chemical reaction you can list all the atoms on the right and left, then count, and add coefficients until the reac

IrinaVladis [17]

Answer:

I think option 3 is correct

7 0

2 years ago

A element that starts with the letter c (from the periodic table)

DaniilM [7]

C- carbon

Ca- calcium

Cl- chlorine

Co- cobalt

Cu- copper

Idk how many you need or you just needed carbon. Which is C

7 0

2 years ago