All categories

3 years ago

Which set is an example of an element, a compound, and a mixture?

Chemistry

1 answer:

Nitella [24]3 years ago

4 0

Answer:

Element: Sulfur ; S

Compound: Water ; H2O

Mixture: Gunpowder ; 2 KNO3 + S + 3 C -> K2S + N2 + 3 CO2

Explanation:

An element is a pure substance that cannot be broken down into simpler substances. A periodic table for example has elements.

A compound is a chemical substance that's made of multiple elements held together by chemical bonds. All elements from the periodic table can be combined to make a compound but they have to bond a specific way in order for them to actually make something. Water is the easiest to remember.

A mixture is two or more substances that are physically combined. They are not chemically combined though. There are a few types of mixtures including homogeneous, heterogeneous, etc. Gunpowder is actually a mixture. It contains sulfur, carbon and potassium nitrate.

Don't be afraid to reach out with further questions, I hope this helps!

You might be interested in

The energy that is released in the hydrogen fusion reaction comes from __________.

timurjin [86]

The energy that is released in the hydrogen fusion reaction comes from the difference in mass between the 4 hydrogen H nuclei and single helium He nucleus

The answer is: The difference in mass between the four hydrogen nuclei and single helium nucleus

8 0

2 years ago

Which are the MOST LIKELY products of the reaction between sodium metal and chlorine gas?

Mrac [35]

2Na + Cl₂ ----> 2NaCl

answer is C

7 0

3 years ago

How would you prepare 2-methyl-2-propanol via a grignard with dimethyl carbonate as your carbonyl source? show all reagents?

Andreas93 [3]

Answer:

React it with CH₃MgBr and work up the product with saturated ammonium chloride solution

Explanation:

Grignard reagents convert esters into tertiary alcohols.

The general equation is

$\text{RCOOR}' \xrightarrow[\text{2. H}^{+}]{\text{1. R$^{\prime \prime}$MgBr}}\text{RR$_{2}^{\prime \prime}$C-OH}$

The Grignard reagent in this synthesis is methylmagnesium bromide. You prepare it by reacting a solution methyl bromide in anhydrous ether with magnesium and a few crystals of iodine.

The reaction consumes 3 mol of CH₃MgBr per mole of dimethyl carbonate, and everything happens in the same pot.

Acid workup of the product usually involves the addition of a saturated aqueous solution of ammonium chloride and extraction with a low-boiling organic solvent.

The mechanism involves:

Step 1. Nucleophilic attack and loss of leaving group

(a) The Grignard reagent attacks the carbonyl of dimethyl carbonate, followed by (b) the loss of a methoxide leaving group.

Step 2. Nucleophilic attack and loss of leaving group

(a) A second mole of the Grignard reagent attacks the carbonyl of methyl acetate, followed by (b) the loss of a methoxide leaving group.

Step 3. Nucleophilic attack and protonation of the adduct.

(a) A third mole of the Grignard reagent attacks the carbonyl of acetone, followed by (b) protonation of the alkoxide to form 2-methylpropan-2-ol.

3 0

3 years ago

Can you help me figure out how to determine the Conjugate Acid of Sodium Chloride - NACL ?

mars1129 [50]

Answer:

Explanations:

4 0

1 year ago

Explain how compaction is important in the formation of coal.

olchik [2.2K]

Coal is being formed from decayed fossils and remains. These materials are smashed, "compacted" together until their chemicals merge together from the pressure of the compacting this is also how diamonds form from coal just more heat and more pressure. This process is called compaction. Without such, no coal will be present.

7 0

3 years ago

Read 2 more answers