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Kryger [21]
3 years ago
6

About how many times longer than modern humans have hooved mammals lived on earth?

Chemistry
1 answer:
abruzzese [7]3 years ago
8 0

Answer:

I think it should be about maybe the times of the dinosaurs

also I think 23 to 16 billion years

Explanation:

No explanation sorry if im wrong

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Just give me the answer lol
Alex

Answer:

what is the question?

Explanation:

if you tell me ill update it if i got the info

8 0
2 years ago
The quantity of energy released or absorbed as heat during a chemical reaction is called the 28. a. temperature. c. entropy d. f
Tatiana [17]

Answer: enthalpy of reaction.

Explanation:

Temperature of the gas is defined as the degree of hotness or coldness of a body. It is expressed in units like ^0C and K

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

Free energy is the amount of energy that can be converted into useful work.

Enthalpy of the reaction is the difference between the energy of products and the energy of reactants. it is either the heat released or absorbed during the reaction. It is either positive or negative.

5 0
4 years ago
When a solution labeled 0.50 m hno3 is diluted with water to give 0.25 m hno3, what happens to the number of moles of hno3 in th
Tju [1.3M]

Answer;

The number of moles remains constant.

Explanation;

-A dilution is a solution made by adding more solvent to a more concentrated solution (stock solution), which reduces the concentration of the solute.

-To dilute a stock solution, the following dilution equation is used:

   M1 V1 = M2 V2.     where; M1 and V1 are the molarity and volume of the concentrated stock solution, and M2 and V2 are the molarity and volume of the diluted solution you want to make.

-The process of dilution keeps the amount of solute constant, but increases the total amount of solution, thereby decreasing its final concentration.


5 0
3 years ago
Classify each salt as acidic, basic, or neutral. drag the appropriate items to their respective bins. hints hint 1. how to appro
FinnZ [79.3K]

It is known that acids compounds contains hydrogen and produces hydrogen ion in water. A binary acid however is an acid that have two elements, one of the element has a hydrogen attached to it. Examples of binary acids are hydrogen fluoride (HF), hydrogen bromide (HBr) and hydrogen sulfide (H2S). In naming a binary acid, it has two rules; one, as pure compounds and two, as acid solutions. For pure compounds, start with the name ‘hydrogen’ and end the anion name with ‘-ide’. For acidic compounds, start with ‘hydro-‘, end the anion with ‘-ic’ and add ‘acid’.

3 0
4 years ago
Read 2 more answers
The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 2.7 cm by 1.2 cm by 14.3 cm.
Fofino [41]

Answer:125.0964g

Explanation:

Density = mass/volume

Density = 2.7 gcm-3

Volume=2.7*1.2*14.3=46.332

Mass=?

Mass= density* volume

= 2.7× 46.332=125.0964g

4 0
3 years ago
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