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3 years ago

Wich of the following is a unit of volume in the english system of mesurement

Chemistry

1 answer:

ch4aika [34]3 years ago

5 0

Answer:

uhh its gallon

Explanation:

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What volume would 56.2 mL of gas at 820 mm of Hg occupy at 720 mm of Hg?

Andreyy89

Answer:

49.35 mL

Explanation:

Given: 56.2 mL of gas

To find: volume that 56.2 mL of gas at 820 mm of Hg would occupy at 720 mm of Hg

Solution:

At 820 mm of Hg, volume of gas is 56.2 mL

At 1 mm of Hg, volume of gas is $\frac{56.2}{820}$

At 720 mm of Hg, volume of gas is $\frac{56.2}{820}(720)=49.35\,\,mL$

3 0

2 years ago

Sort these species into isoelectronic groups. It doesn\'t matter which group goes in which box, so long as the correct species a

OleMash [197]

Answer : The isoelectronic groups are:

$He,Be^{2+},Li^{+}$

$N^{3-},Mg^{2+}$

$S^{2-},Ti^{4+},K^{+}$

Explanation :

Isoelectronic : It is defined as the compound or molecule having the same number of electrons and the same number of electronic structure.

The element is helium. The number of electrons are 2.
The element is beryllium. The number of electrons are 4. The number of electrons in $Be^{2+}$ = 4 - 2 = 2
The element is lithium. The number of electrons are 3. The number of electrons in $Li^{+}$ = 3 - 1 = 2
The element is nitrogen. The number of electrons are 7. The number of electrons in $N^{3-}$ = 7 + 3 = 10
The element is neon. The number of electrons are 10.
The element is sulfur. The number of electrons are 16. The number of electrons in $S^{2-}$ = 16 + 2 = 18
The element is magnesium. The number of electrons are 12. The number of electrons in $Mg^{2+}$ = 12 - 2 = 10
The element is titanium. The number of electrons are 22. The number of electrons in $Ti^{4+}$ = 22 - 4 = 18
The element is potassium. The number of electrons are 19. The number of electrons in $K^{+}$ = 19 - 1 = 18

The isoelectronic groups are:

$He,Be^{2+},Li^{+}$

$N^{3-},Mg^{2+}$

$S^{2-},Ti^{4+},K^{+}$

7 0

2 years ago

Two students were doing an experiment which involved adding potassium sulfate powder to water. They added one teaspoon of potass

lana [24]

Answer:

less concentrated

Explanation:

because it will get dissociated into more ions

7 0

2 years ago

A hydrated salt, MgSO4, weighing 3.211 g is heated in a crucible until reaching a constant weight. The weight of the anhydrous M

Novay_Z [31]

Magnesium sulfate is an inorganic salt with the formula MgSO4(H2O)x where 0≤x≤7. It is often encountered as the heptahydrate sulfate mineral epsomite (MgSO4·7H2O), commonly called Epsom salt.

6 0

2 years ago

Which equation is balanced?

Paha777 [63]

Answer:

it's the third one

Explanation:

in the first one oxygen molecules aren't balanced

the second ok me oxygen isnt balanced

and the fourth one hydrogen isn't balanced

hope it helps ;)

5 0

2 years ago

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Wich of the following is a unit of volume in the english system of mesurement​

Wich of the following is a unit of volume in the english system of mesurement