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Marta_Voda [28]
3 years ago
13

Archaeology has shown that ancient people _____.

Chemistry
2 answers:
Readme [11.4K]3 years ago
6 0
I would say developed technologies which somehow were lost

like the stone age: the stone hammer, who used that afterwards in the roman empire era and stuff?
Nady [450]3 years ago
3 0

Answer:

The correct answer will be options-

1. had understanding of scientific principles.

2. had understanding of scientific principles.

3. developed technologies which somehow were lost.

Explanation:

The ancient people are considered primitive in the sense that they lived during the time when they started understanding the world to exploit it. Scientifically they were all considered modern humans as they possessed the brain with the same capacity as we have that is 1500 cc.

The collected evidence show that they formed the earlier civilizations on earth and were aware of their natural world in which they were living and tried to understand the world so they can exploit nature.

The developed the scientific principles, developed the language of mathematics for business and the better economy as well as tools and techniques which helped their survival which was lost.

Thus, the selected options are the correct answer.

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These models show the electron structures of two different nonmetal elements. Element 1 at left has a purple circle at center wi
Daniel [21]

Answer:

Element 2

Explanation:

If we look at the model stated for element 1, it is clear that element 1 must be a noble gas. It has eight electrons in its outermost shell this implies that it has already attained a complete octet of electrons and is reluctant towards chemical reaction.

The second element belongs to group 16 since it has six electrons on its outermost shell. It is certainly more reactive than element 1 which is a noble gas.

7 0
4 years ago
Read 2 more answers
A solution is prepared by adding 100 mL of 1.0 M HC2H3O2 (aq) to 100 mL of 1.0 M NaC2H3O2 (aq). The solution is stirred and its
DIA [1.3K]

Answer:

(C) H3O+(aq) + C2H3O2−(aq) -> HC2H3O2(aq) + H2O(l)

Explanation:

A buffer is a solution of a weak acid and its salt. It mitigates against changes in acidity or alkalinity of a system. A buffer maintains the pH at a constant value by switching the equilibrium concentration of the conjugate acid or conjugate base respectively.

Addition if an acid shifts the equilibrium position towards the conjugate acid side while addition of a base shifts the equilibrium position towards the conjugate base side.

5 0
3 years ago
Some oxygen gas takes up a volume of 2.00 liters at 0.99 atm and 273 K. Its volume doubles and its temperature decreases to 137
nataly862011 [7]

Answer:

The answer to your question is : letter B. 0.25 atm

Explanation:

To solve this problem we need to use the combined gas law:

    <u>P₁V₁</u>   =    <u>P₂V₂</u>

      T₁              T₂

Data

P1 = 0.99 atm  V1 = 2 l  T1 = 273K

P2 = ?               V2 = 4 l   T2 = 137K

Now, the clear P2 from the equation and we get

       P2 = P1V1T2 / T1V2

Substitution         P2 = (2 x 0.99 x 137)/(273 x 4)

       P2 = 271.26 / 1092

Result       P2 = 0.248 atm ≈ 0.25 atm

5 0
3 years ago
Read 2 more answers
The energy exchange with the environment during a chemical reaction is called the _____ of reaction.
Allisa [31]
The temperature of reaction.
3 0
4 years ago
Read 2 more answers
What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass number of 39
zvonat [6]

Answer:

NO OF NEUTRON =MASS NO -ATOMIC NO

=39-19

=20

bcz atomic no is equal to no of electrons

mark as brainliest

7 0
3 years ago
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