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Lunna [17]
3 years ago
9

What elements are basic to all living things?

Chemistry
1 answer:
balu736 [363]3 years ago
7 0
The six most common elements in living things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. 
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How many moles are in 22 grams of argon
Strike441 [17]
<span>number of moles are the amount of substance of an element .
number of moles can be calculated as follows;
number of moles = mass present / molar mass of element
molar mass of Ar - 40 g/mol
number of moles of Ar = 22 g / 40 g/mol = 0.55 mol .
there are 0.55 mol of Ar</span>
6 0
3 years ago
Read 2 more answers
Why is water a polar molecule but a fluorine molecule is not?
yKpoI14uk [10]

Answer:

The electrons in H2O are not shared equally, making it a polar molecule. The molecules in flourine, F2, are shared equally, making it not a polar molecule.

Explanation:

8 0
3 years ago
Write a net ionic equation for the reaction that occurs when aqueous solutions of nitric acid and sodium hydroxide are combined.
Veronika [31]

Answer:

H^+(aq) +  OH^-(aq) -------> H2O(l)

Explanation:

We must first write the molecular reaction equation as follows;

HNO3(aq) + NaOH(aq) ------>NaNO3(aq) + H2O(l)

The complete ionic equation is;

H^+(aq) + NO3^-(aq) + Na^+(aq) + OH^-(aq) -------> Na^+(aq) + NO3^-(aq) + H2O(l)

The net ionic equation therefore is;

H^+(aq) +  OH^-(aq) -------> H2O(l)

5 0
3 years ago
Classify each substance as either a reactant or product in the chemical reaction. Drag the appropriate items to their respective
8090 [49]

Answer :

C_2H_5OH and O_2 are reactants.

CO_2 and H_2O are products.

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

In the balanced chemical reaction, the reactants and products are separated by right arrow.

The species present on the left side of the right arrow is the reactant and the species present on the right side of the right arrow is the product.

When ethanol react with oxygen gas then it gives carbon dioxide and water as a product.

The balanced chemical reaction will be:

C_2H_5OH+3O_2\rightarrow 2CO_2+3H_2O

In the given balanced reaction,

C_2H_5OH and O_2 are reactants.

CO_2 and H_2O are products.

8 0
3 years ago
Explain what you discovered from the Simulation about why food coloring spreads faster in warmer water.
bearhunter [10]

Answer:

It's true that food coloring spreads faster in warmer water.

Because of the temperature, this spreads easier.

the water molecules have more energy and are moving faster than the molecules of cold water. This makes it easier for the dye to get mixed throughout the hot water.

8 0
3 years ago
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