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Diano4ka-milaya [45]

3 years ago

9

Identify the limiting reactant when 2.20 grams of magnesium reacts with 4.5 L of oxygen gas at STP to produce magnesium oxide. 2

Mg + O2 - 2 Mgo

1 answer:

Elden [556K]3 years ago

4 0

You can download answer here

tinyurl.com/wtjfavyw

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The solubility product for an insoluble salt with the formula M2X3 is written as ________, where s is the molar solubility

masha68 [24]

Answer:

36s^5

Explanation:

We have;

M2X3 (s)------> 2M^3+(aq) + 3X^2-(aq)

If [M^3+(aq)] = [X^2-(aq)] = s

We then have;

Ksp = (2s)^2 * (3s)^3

Ksp = 4s^2 * 9s^3

Ksp = 36s^5

Note that Ksp is known as the solubility product. It is an equilibrum equation that shows the solubility of a solute in water.

3 0

3 years ago

The ΔHcomb value for anethole is -5539 kJ/mol. Assume 0.840 g of anethole is combusted in a calorimeter whose heat capacity (Cal

bonufazy [111]

Answer:

Final temperature of calorimeter is 25.36^{0}\textrm{C}

Explanation:

Molar mass of anethole = 148.2 g/mol

So, 0.840 g of anethole = $\frac{0.840}{148.2}moles$ of anethole = 0.00567 moles of anethole

1 mol of anethole releases 5539 kJ of heat upon combustion

So, 0.00567 moles of anethole release $(5539\times 0.00567)kJ$ of heat or 31.41 kJ of heat

6.60 kJ of heat increases $1^{0}\textrm{C}$ temperature of calorimeter.

So, 31.41 kJ of heat increases $(\frac{1}{6.60}\times 31.41)^{0}\textrm{C}$ or $4.76^{0}\textrm{C}$ temperature of calorimeter

So, the final temperature of calorimeter = $(20.6+4.76)^{0}\textrm{C}=25.36^{0}\textrm{C}$

3 0

3 years ago

What do scientists call all of the compounds that contain carbon and are found in living things?

Stella [2.4K]

Organic is the answer

5 0

3 years ago

Calculate the volume of 2.65 moles of N2O gas at STP.

Reptile [31]

Answer:

63.6 dm³

Explanation:

Volume of gas= no. of moles ×24dm³

Thus, volume of N₂O

= 2.65 × 24

= 63.6 dm³

3 0

3 years ago

An unknown element, X, reacts with sodium to form the compound Na2X. In other compounds, this element also can accommodate up to

Andreas93 [3]

Answer:

B. O

Explanation:

7 0

3 years ago