4 years ago

What property of nonmetals can be determined using a flashlight?

Chemistry

1 answer:

Svetlanka [38]4 years ago

7 0

Light shining through the less dense material.

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If the prescribed dosage of milk of magnesia Mg(OH)2 is 3.5 moles, how many grams

OlgaM077 [116]

Answer:

Explanation:

1 mole is equal to 58.31968 grams.

so 3.5 moles equal to answer choice B

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3 years ago

Complete the following radioactive decay problem.

zzz [600]

I think it’s the third option

7 0

3 years ago

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The fact that HBO2, a reactive compound, was produced rather than the relatively inert B2O3 was a factor in the discontinuation

Reil [10]

Answer:

1027.62 g

Explanation:

For $B_2H_6$ :-

Mass of $B_2H_6$ = 296.1 g

Molar mass of $B_2H_6$ = 27.66 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{296.1\ g}{27.66\ g/mol}$

$Moles\ of\ B_2H_6= 10.705\ mol$

From the balanced reaction:-

$B_2H_6(g) + 3 O2_{(l)}\rightarrow 2 HBO_2_{(g)}+ 2 H_2O_{(l)}$

1 mole of $B_2H_6$ react with 3 moles of oxygen

Thus,

10.705 mole of $B_2H_6$ react with 3*10.705 moles of oxygen

Moles of oxygen = 32.115 moles

Molar mass of oxygen gas = 31.998 g/mol

Mass = Moles * Molar mass = 32.115 * 31.998 g = 1027.62 g

8 0

3 years ago

Unlike the cell wall, the cell membrane is…

irakobra [83]

B: produces energy for the cell

5 0

4 years ago

Which element has a +2 charge and has a configuration of 1s22s22p3? A) B B) F

PSYCHO15rus [73]

Fluorine(F)

Explanation:-

Fluorine has Z=9
+2 charge means 2 electrons donated (7left only)

Lets look at Electronic configuration

$\\ \sf\longmapsto 1s^22s^22p^3$

6 0

3 years ago