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8 days ago

How many grams of nano3 would you add to 500g of h2o in order to prepare a solution that is 0.500 molal in nano3?

1 answer:

4 0

When concentration levels are defined in molality, they indicate moles of solute per kilogram of solvent. Having the solvent's mass, which consists of water, allows us to find the moles of NaNO3 solute.

With 0.5 m being equal to x moles of NaNO3 divided by 0.5 kg of water, we calculate x = 0.25 moles of NaNO3.

Given that the molar mass of NaNO3 is 85 g/mol, the mass required is

0.25 moles * 85 g/mol = 21.25 grams NaNO3 needed.

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A laboratory analysis of an unknown sample yields 74.0% carbon, 7.4% hydrogen, 8.6% nitrogen, and 10.0% oxygen. What is the empi

Tems11 [846]

Assuming we have a 100g sample, the mass of each element is as follows:
C: 74 g
H: 7.4 g
N: 8.6 g
O: 10 g
Next, we calculate the moles of each by dividing the mass of each element by its molar mass:
C: (74 / 12) = 6.17
H: (7.4 / 1) = 7.4
N: (8.6 / 14) = 0.61
O: (10 / 16) = 0.625
Now, we take the smallest value to determine the ratio:
C: 10
H: 12
N: 1
O: 1
Thus, the empirical formula can be expressed as
C10H12NO

3 0

6 days ago

(a) calculate the %ic of the interatomic bond for the intermetallic compound tial3. (b) on the basis of this result, what type o

Tems11 [846]

Answer :

The percentage ionic character (%IC) equals 10%, indicating the bond is mostly covalent with slight polarity.

Percent Ionic Character:

This reflects the fraction of ionic nature within a polar covalent bond. The formula for %IC (% ionic character) is:

$Percent Ionic character = 1 - e^-^0^.^2^5 ^*^(^X^a^-^X^b^) * 100$

Here, Xa is the electronegativity of atom A and Xb is that of atom B.

Given: The compound is TiAl₃.

Electronegativity of Ti = 2.0

Electronegativity of Al = 1.6 (as shown in the provided image)

Substitute these values into the formula:

$Percent Ionic character = 1 - e^-^0^.^2^5 ^*^(^2^.^0^-^1^.^6^) * 100$

$Percent Ionic character = 1 - e^(^-^0^.^2^5 ^*^0^.^4^) * 100$

$Percent Ionic character = 1 - e^(^-^0^.^1^) * 100$

The value of e⁻¹ equals 0.90.

Therefore, percent ionic character = (1 - 0.90) × 100

Percent Ionic Character = 10%

Because the % IC is only 10%, which is relatively low, the bond is classified as covalent with minimal polarity.

8 0

16 days ago

Bonds between two atoms that are equally electronegative are _____. bonds between two atoms that are equally electronegative are

Alekssandra [968]

When two atoms with equal electronegativity bond together, they form nonpolar covalent bonds.

Your second statement mirrors the first; the second statement likely reads, "Bonds between two atoms with unequal electronegativity are termed polar covalent bonds."

4 0

10 days ago

What message would you have gotten if your computer become infected with the elk cloner virus

Anarel [852]

Elk Cloner: A program that personifies itself. It’ll attach to all your disks. It infiltrates your chips. Yes, it’s Cloner! It adheres to you like glue. It adjusts RAM to engage the Cloner.

7 0

11 days ago

Read 2 more answers

Determine ΔT if T1 = 5oC and T2 = 123oC

eduard [944]

Answer:

73oc

Explanation:

The change in temperature is calculated as T=123-50=73

5 0

5 days ago