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4 years ago

EMERGENCY WILL MARK BRAINLIEST JUST PLS HELP!!!

Chemistry

1 answer:

klasskru [66]4 years ago

6 0

Ionic bond = chemical bond formed when electrons....

Electrical force = force between two charged ions ....ect

Ionic compound = compounds whose atoms form bonds ......

Crystal = smooth solid formed by repeating patterns.....

Polyatomic ion = ion made of two or more atoms of .....

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Liquid octane (CH) has a density of 0.7025 g/mL at 20 °C. Find the true mass (murue) of octane when the mass weighed in 18 air i

Goshia [24]

Explanation:

According to Buoyance equation,

m = $[m' \times \frac{1 - \frac{d_{a}}{d_{w}}}{1 - \frac{d_{a}}{d}}]$

where, m = true mass

m' = mass read from the balance = 17.320 g

$d_{a}$ = density of air = 0.0012 g/ml

$d_{w}$ = density of the balance = 7.5 g/ml

d = density of liquid octane = 0.7025 g/ml

Now, putting all the given values into the above formula and calculate the true mass as follows.

m = $[m' \times \frac{1 - \frac{d_{a}}{d_{w}}}{1 - \frac{d_{a}}{d}}]$

= $[17.320 g \times \frac{1 - \frac{0.0012 g/ml}{7.5 g/ml}}{1 - \frac{0.0012 g/ml}{0.7025}}]$

= $17.320 g \times 0.999850$

= 17.317 g

Thus, we can conclude that the true mass of octane is 17.317 g.

7 0

3 years ago

Which units represent density? Select all that apply A. cm³ B. g/m³ C. g/cm³ D. cm³/gm E. kg/L F. kg/cm³ G. mL/cm³

Fed [463]

<span>Out of the options here, the most suitable units that could be used for representing density would be option c) g/cm. Density is a value for mass (in this case g) divided by a value for volume (in this case cm). Option E, kg/L, would also work.</span>

4 0

3 years ago

Read 2 more answers

Identify the processes involved in changes of state between liquids and solids

artcher [175]

Liquid is water or drink and solid is hard

3 0

3 years ago

Which of the following elements would be the least likely to form a cation if involved in a chemical reaction?

quester [9]

Cation means postive charged
answer is potassium.
being +1

6 0

3 years ago

Read 2 more answers

For the following reaction, 42.2 grams of potassium hydrogen sulfate are allowed to react with 21.4 grams of potassium hydroxide

ASHA 777 [7]

Answer:

53.99g

Explanation:

Step 1:

The balanced equation for the reaction. This is given below:

KHSO4(aq) + KOH(aq) —> K2SO4(aq) + H2O(l)

Step 2:

Determination of the masses of KHSO4 and KOH that reacted and the mass of K2SO4 produced from the balanced equation.

This is illustrated below:

Molar mass of KHSO4 = 39 + 1 + 32 + (16x4) = 136g/mol

Mass of KHSO4 from the balanced equation = 1 x 136 = 136g

Molar mass of KOH = 39 + 16 + 1 = 56g/mol

Mass of KOH from the balanced equation = 1 x 56 = 56g

Molar mass of K2SO4 = (39x2) + 32 + (16x4) = 174g/mol

Mass of K2SO4 from the balanced equation = 1 x 174 = 174g.

From the balanced equation above, 136g of KHSO4 reacted with 56g of KOH to produce 174g of K2SO4

Step 3:

Determination of the limiting reactant. This is illustrated below:

From the balanced equation above, 136g of KHSO4 reacted with 56g of KOH.

Therefore, 42.2g of KHSO4 will react with = (42.2 x 56)/136 = 17.38g of KOH.

From the above calculations, we can see that only 17.38g out of 21.4g of KOH given was needed to react completely with 42.2g of KHSO4.

Therefore, KHSO4 is the limiting reactant and KOH is the excess reactant.

Step 4:

Determination of the maximum mass of K2SO4 produced from the reaction.

In this case, the limiting reactant will be used as all of it is used up in the reaction. The limiting reactant is KHSO4 and the maximum amount of K2SO4 produced can be obtained as follow:

From the balanced equation above, 136g of KHSO4 reacted to produce 174g of K2SO4.

Therefore, 42.2g of KHSO4 will react to produce = (42.2 x 174)/136 = 53.99g of K2SO4.

Therefore, the maximum amount of K2SO4 produced is 53.99g.

8 0

3 years ago