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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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Need help with this.
Jobisdone [24]

Answer:

18.2 g.

Explanation:

You need to first figure out how many moles of nitrogen gas and hydrogen (gas) you have. To do this, use the molar masses of nitrogen gas and hydrogen (gas) on the periodic table. You get the following:

0.535 g. N2 and 1.984 g. H2

Then find out which reactant is the limiting one. In this case, it's N2. The amount of ammonia, then, that would be produced is 2 times the amount of moles of N2. This gives you 1.07 mol, approximately. Then multiply this by the molar mass of ammonia to find your answer of 18.2 g.

5 0
3 years ago
A 248-g piece of copper is dropped into 390 mL of water at 22.6 °C. The final temperature of the water was measured as 39.9 °C.
max2010maxim [7]

Answer:

The answer to your question is: Initial temperature of copper = 67.1°C

Explanation:

Data

mass Copper = 248 g

volume Water = 390 ml

T1 water = 22.6°C

T2           = 39.9°C

T1 copper = ?

Specific heat water = 1 cal/g°C

Specific heat copper = 0.092 cal/g°C

Formula       copper             water

Heat is negative for copper because it releases heat

                  - mCp(T2 - T1) = mCp(T2 - T1)                  

                  - (248)(39.9 - T1) = 390 (1)((39.9 - 22.6)           Substitution

                 -9895.2 + 248T1 = 390(17.3)                             Simplification

                 -9895.2 + 248T1 = 6747

                 248 T1 = 6747 + 9895.2

                 248 T1 = 16642.2

                 T1 = 16642.2 / 248

                 T1 = 67.1 °C                                                         Result

6 0
3 years ago
What is a flammable mixture of many different substances
Wittaler [7]
The correct answer you are looking for is napalm 

Hope this helps!
5 0
3 years ago
Which of the following is not an example of a NATURAL polymer?
kondaur [170]
Sugar is not a polymer
5 0
3 years ago
Starting with 6.3 g of salicylic acid, how many grams of acetylsalicylic acid (theoretical yield) can be made? Assume salicylic
tensa zangetsu [6.8K]

Answer:

We will produce 8.2 grams of acetylsalicylic acid

Explanation:

step 1: Data given

Mass of salicylic acid, = 6.3 grams

Molar mass salicylic acid = 138.12 g/mol

Molar mass of acetylsalicylic acid = 180.158 g/mol

Step 2: The balanced equation

C7H6O3 + C4H6O3 → C9H8O4 + C2H4O2

Step 3: Calculate moles salicylic acid

Moles salicylic acid = mass salicylic acid / molar mass salicylic acid

Moles salicylic acid = 6.3 grams / 138.12 g/mol

Moles salicylic acid = 0.0456 moles

Step 4: Calculate moles acetylsalicylic acid

Since the mole ratio is 1 to 1

For 0.0456 moles salicylic acid we'll have 0.0456 moles acetylsalicylic acid

Step 5: Calculate mass acetylsalicylic acid

MAss acetylsalicylic acid = moles acetylsalicylic acid * molar mass acetylsalicylic acid

MAss acetylsalicylic acid = 0.0456 moles * 180.158 g/mol

Mass acetylsalicylic acid = 8.2 grams

We will produce 8.2 grams of acetylsalicylic acid

4 0
3 years ago
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