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irina1246 [14]
3 years ago
9

A large piece of iron was reacted with an acid. What would happen to the rate of the reaction had the large piece been finely di

vided into smaller pieces?
Chemistry
2 answers:
Anna007 [38]3 years ago
3 0
The reaction occurs in a similar way as magnesium does, but much less vigorous. Strong heating is required to make iron powder burn in oxygen. The reaction gives out a yellow showery sparks and produces a black solid. iron reacts with dilute hydrocloric acid to give iron chloride and hydrogen gas.
bekas [8.4K]3 years ago
3 0

For a reaction to occur there must be effective collision between the reactant molecules. When the iron or the reactant particles are finely divided that increases the surface area exposing more reactant particles on the surface and increase the rate of intermoleculer collision. The  greater effective collision between the reactant molecules the faster will the reaction occur.

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Calculate the molarity of a solution of monoprotic KHP prepared by mixing a 0.5237 g KHP in 50.0 mL of water .
Sergio039 [100]

Answer:

M=0.0513M

Explanation:

Hello!

In this case, since the molarity of a solution is computed by dividing the moles of solute by the volume of solution, we notice we first need the moles of KHP as shown below:

n=0.5237g*\frac{1mol}{204.22 g} =0.00256mol

Next, the volume in liters:

V=50.0mL*\frac{1L}{1000mL}\\\\V=0.0500L

Thus, the molarity turns out to be:

M=\frac{n}{V}\\\\M=\frac{0.00256mol}{0.05000L} \\\\M=0.0513M

Best regards!

3 0
3 years ago
How many liters of oxygen gas (O2) are needed to produce 100 kJ of energy at STP? 2C6H6(I) + 1502(g) —> 12CO2(g)+6H2O(g)+3909
makkiz [27]

Answer: 8.59 L of oxygen gas are needed to produce 100 kJ of energy at STP

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

Standard condition of temperature (STP)  is 273 K and atmospheric pressure is 1 atmosphere respectively.  

1 mole of every gas occupy volume at STP = 22.4 L

The balanced chemical reaction is:

2C_6H_6(I)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)

3909.9 kJ of of energy is produced by  = 15\times 22.4=336L

100 kJ of oxygen gas are needed to produce = \frac{336}{3909.9}\times 100=8.59L

7 0
3 years ago
A graduated cylinder was filled to 20.3 mL with water. A solid object weighing 73.05 g was immersed in the water, raising the me
victus00 [196]

The density of the solid object will be 2.63 g/mL

<h3>What is density?</h3>

Density of objects = mass/volume.

Recall that an object will always displace its own volume when placed in a liquid.

Volume of the solid object = Cylinder reading after immersing the object in the water - cylinder reading before immersing the object in the water.

             = 48.1 - 20.4

                  = 27.8 mL

Mass of the solid object = 73.05 g

Density of the object = 73.05/27.8

                                         = 2.63 g/mL

More on density can be found here: brainly.com/question/15164682

#SPJ1

3 0
1 year ago
Household bleach is an aqueous solution which has a pH of about 11 and feels slippery to the
Helen [10]
It’s b or d hope this helps
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3 years ago
Aluminum boils at 2467°C. Aluminum’s boiling point in Kelvin is 2194.<br> T or F
dusya [7]
That is false because aluminum melts at 2,470C
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