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irina [24]
4 years ago
13

I need this as soon as possible it’s a test:(

Chemistry
1 answer:
iVinArrow [24]4 years ago
7 0

Answer : The correct match is:

(1) → (k)

(2) → (j)

(3) → (f)

(4) → (d)

(5) → (e)

(6) → (g)

(7) → (a)

(8) → (i)

(9) → (l)

(10) → (c)

(11) → (b)

(12) → (h)

Explanation :

Physical property : It is defined as a change in which the identity of substance does not change.

Physical change : It is defined as something observed while keeping the identity of the substance the same.

Homogeneous mixture : It is defined as something made up of at least two different substances and is usually very difficult to separate. Even distribution of particles.

Heterogeneous mixture : It is defined as something made up of at least two different substances and easily separated by physical means. Unequal distribution of particles.

Chemical property : It is defined as something observed by changing the identity of a substance.

Compound : It is defined as a pure substance made up of at leat two different elements.

Matter : It is defined as anything that has matter and takes up space.

Chemical change : it s defined as a change that creates a new substance or compound.

Extensive property : It is defined as a property that change with the amount of matter present.

Mass : It is defined as the amount of matter contained in an object.

Volume : It is defined as the amount of space a substance takes up.

Intensive property : It is defined as a property that does not change with the amount of matter present.

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Covalently bonded compounds differ from ionically bonded compounds because:
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Answer:Covalently bonded materials are less dense than metallic or ionically bonded ones because covalent bonds are directional in nature whereas metallic and ionic are not; when bonds are directional, the atoms cannot pack together in a dense manner, yielding a lower mass density then solids with non-directional bonds.

Explanation:

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The pH of a solution is determined to be 11.6. It is
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The solution is basic since it has a pH of 11.6. A pH 
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Not a timed or graded assignment. Please show all calculation work. Question prompt : “what mass of the excess reactant will get
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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

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

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

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

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

<em>7.28g HCl will get used in the reaction.</em>

.

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2 years ago
How many grams of ko2 are needed to form 6.5 g of o2?
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