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Paha777 [63]
3 years ago
7

Who made the first periodic table of the element

Chemistry
2 answers:
Vadim26 [7]3 years ago
5 0

Answer:

Her name is Dmitri Mendeleev

Marianna [84]3 years ago
5 0
Dmitri Mendeleev.

So basically there was earth fire water and air,

And the 4 elements were chilling,

But on Feb 17, 1869. This russian dude was like,

NOPE there like 1 million elements actually

So yea, hope this helps lol
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Colby wants to learn more about the feeding habits of ants.
emmasim [6.3K]

Answer:

a. form a hypothesis, conduct an experiment, record data, make a conclusion

Explanation:

Performing scientific investigations involved following the SCIENTIFIC METHOD, which is a rule or guideline followed in order to discover knowledge about natural phenomena. The scientific method has been divided into steps viz:

- Making observation/asking questions: In this case, the problem is HOW ANTS FEED.

- Formulating hypothesis: The hypothesis is a testable explanation given to solve the asked question.

- Testing hypothesis: The hypothesis must be able to be tested via conducting an experiment.

- Analyze result: The results of the test is recorded and analysed as data.

- Make conclusions: The conclusion either accepts or rejects the hypothesis depending on the result of the experiment.

Therefore, based on this; form a hypothesis, conduct an experiment, record data, make a conclusion are the steps Colby should take to best study the feeding patterns of ants

6 0
4 years ago
How many moles of O2 are needed to react with 2.35 mol of C2H2?
Mrrafil [7]
2 C2H2 + 5 O2 --> 4 CO2 + 2 H2O

2.35 mol C2H2 - x mol O2
2 mol C2H2 - 5 mol O2

x =  \frac{2.35 \times 5}{2}  = 5.875 \: mol
answer: 5.875 mol
5 0
4 years ago
Read 2 more answers
A gas at 200 K occupies a volume of 350 ml. What temperature is needed to increase the volume
Rudik [331]

Answer: Temperature in constant pressure is 286 K

Explanation: If pressure remains constant, then V/T = constant.

V1 = 350 ml and T1 = 200 K and V2 = 500 ml.  V1/T1 = V2/T2

and T2 = T1· V2 / V1 = 200 K · 500 ml / 300 ml = 285,7 K

5 0
3 years ago
Which cell has the better survival plan, animal or plant cell? Support your answer with facts I WILL GIVE BRAINLIEST ANSWER
d1i1m1o1n [39]
If im not mistaken plant cells go through a stage called photosynthesis meaning the cells can create it's own energy (food) off of water, Co2 and sunlight.
7 0
3 years ago
Which of these is a element?<br> A) Oxygen<br> B) Sodium chloride<br> C) Water<br> D) Air
Sladkaya [172]
B) Sodium chloride

Plz mark me brainliest!

Hope this helps!
4 0
3 years ago
Read 2 more answers
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