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3 years ago

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Gizmo Student Exploration: Periodic Trends awner key, Please I need help with this as soon as possible! I have attached what I h

ave so far

1 answer:

Vlad [161]3 years ago

6 0

Answer:

I cant see it

Explanation:

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What is the total number of atoms in this formula?<br> NaHCO3

Pavel [41]

6 - one sodium atom, 1 hydrogen atom, 1 carbon atom, and 3 oxygen atoms.

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4 years ago

48. Explain how atoms (ions) are held together in an ionic bond. Give an example of an ionic

zalisa [80]

Answer:

By transfer of electron from electropositive to electronegative elements

Explanation:

Examples are NaCl, MgO, Al2O3

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3 years ago

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Acenapthalene has the empirical formula C6H5. A solution of 0.515 g of acenapthalene in 15.0 g CHCl3 boils at 62.5oC. The normal

german

Answer:

The molecular formula of an ascenapthalene is $C_{12}H_{10}$

Explanation:

$\Delta T_b=K_b\times m$

$\Delta T_b=K_b\times \frac{\text{Mass of acenapthalene}}{\text{Molar mass of acenapthalene}\times \text{Mass of chloroform in Kg}}$

where,

$\Delta T_f$ =Elevation in boiling point = $(62.5-61.7)^oC=0.8^oC$

Mass of acenapthalene = 0.515 g

Mass of $CHCl_3$ = 15.0 g = 0.015 kg (1 kg = 1000 g)

$K_b$ = boiling point constant = 3.63 °C/m

m = molality

Now put all the given values in this formula, we get

$0.8^0C=3.67 ^oC/m\times \frac{0.515}{\text{Molar mass of acenapthalene}\times 0.015kg}$

$\text{Molar mass of acenapthalene}=155.7875 g/mol$

Let the molecule formula of the Acenapthalene be $C_{6n]H_{5n}$

$6n\times 12 g/mol+5n\times 1 g/mol=155.7875 g/mol$

n = 2.0

The molecular formula of an ascenapthalene is $C_{12}H_{10}$

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4 years ago

What are 2 ways a mixture defers from a compound

grin007 [14]

Well a mixture is less permanent and also it can be easily taken aprt where a compound does the opposite of those things.

Hope I helped :)

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3 years ago

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If 9 moles of P203 are formed, how many<br> moles of O2 reacted?

masha68 [24]

9 x 3 = 27
27 moles of O reacted
27 / 2 = 13.5 O2 reacted
round up to 14 moles of O2

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2 years ago