When a substance cannot be reduced by physical or chemical means to a simpler form, it is an example of a(n):

Not a timed or graded assignment. Please show all calculation work. Question prompt : “what mass of the excess reactant will get

Vikki [24]

1) Balance the chemical equation

$CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2$

2) Convert grams to moles.

The molar mass of CaCO3 is 100.086 g/mol

$molCaCO_3=10.0gCaCO_3*\frac{1molCaCO_3}{100.086gCacO_3}=0.0999molCaCO_3$

We have 0.0999 mol CaCO3.

The molar mass of HCl is 36.46 g/mol

$molHCl=15.0gHCl*\frac{1molHCl}{36.456gHCl}=0.411molHCl$

We have 0.411 mol HCl.

3) Which is the limiting reactant?

How many moles of CaCO3 do we need to use all of the HCl?

The molar ratio between CaCO3 and HCl is 1 mol CaCO3: 2 mol HCl.

$molCaCO_3=0.411molHCl*\frac{1molCaCO_3}{2molHCl}=0.2055molCaCO_3$

We need 0.2055mol CaCO3 and we have 0.0999mol CaCO3. We do not have enough CaCO3. This is the limiting reactant.

How many moles of HCl do we need to use all of the CaCO3?

The molar ratio between CaCO3 and HCl is 1 mol CaCO3: 2 mol HCl.

$molHCl=0.0999molCaCO_3*\frac{2molHCl}{1molCaCO_3}=0.1998molHCl$

We need 0.1998mol HCl and we have 0.411 mol HCl. We have enough HCl. This is the excess reactant.

4) What mass of the excess reactant will get used?

We have 0.411 mol HCl

We need 0.1998 mol HCl. This is what we will use.

5) Convert moles to grams

The molar mass of HCl is 36.46 g/mol

$gHCl=0.1998molHCl*\frac{36.46gHCl}{1molHCl}=7.285gHCl$

7.28g HCl will get used in the reaction.

.

5 0

2 years ago

The President's Challenge Program is a fitness evaluation designed for __________.

lara [203]

Hi there!

I believe the answer to this is B. Elementary and High school students.

Hope this helps! ☺♥

7 0

3 years ago

Read 2 more answers

Three beakers contain clear, colorless liquids. one beaker contains pure water, another contains salt water, and another contain

tiny-mole [99]

First, we'll identify the beaker containing pure water as follows:
We'll take equal masses from each of the three beakers and measure the mass of each.
We'll then identify the density of each by using the rule : density =mass/volume
Pure water will be the liquid having density equal to 1 gm/cm^3

Then, we'll differentiate between the salt and sugar solution by measuring the conductivity of each solution. Salt solution is a good conductor while solution of sugar is a bad conductor.

8 0

4 years ago

How many total atoms are in 4Al2O3?

Paha777 [63]

Answer:20

Explanation:

5 0

3 years ago

What happens on the side of the earth opposite the moon

Lostsunrise [7]

It will be day time and the other side will be night time

8 0

3 years ago

Read 2 more answers