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yuradex [85]
3 years ago
5

Charlse Darwin introduced the theory of naturalselection as the mechanism for evolution true or false?

Chemistry
1 answer:
KonstantinChe [14]3 years ago
5 0
True.
without natural selection darwin’s theory would not make sense :))
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Help! <br><br> What is the name for addition or subtraction??
kogti [31]

Answer:

I would say operation or symbol

Explanation:

But more an operation I'm sorry I don't really know what your learning so I can't say I know for sure

4 0
3 years ago
When a galvanic cell is comprised of an anode and a cathode of precisely the same material, this is called a(n):
Cloud [144]

Answer:

Concentration cell

Explanation:

Galvanic cells and even electrolytic cells usually consist of two electrodes namely anode and cathode. These 2 electrodes can either be made of the same metals or different metals, and also an electrolyte whereby the two electrodes are immersed.

Now, in the case where the electrodes are made of the same metal, we call it a concentration cell because A concentration cell is a cell that consists of two half-cells that have the same electrodes, but yet differ in concentrations.

3 0
3 years ago
Lấy ví dụ về tính chất hoá học của chất
hodyreva [135]

Answer:

Ví dụ về tính chất hóa học bao gồm tính dễ cháy, tính độc, tính axit, khả năng phản ứng (nhiều loại) và nhiệt của quá trình cháy.

Explanation:

4 0
3 years ago
An element X forms a compound XH 3 with hydrogen. Another element Y forms a compound YX 2 with X. Given that the valency of hydr
Marina CMI [18]
XH_{3}
H has a positive 1 charge. This means that having 3H = +3<span>.  This is a neutral compound so x= -3 because X+3H= 0

Y</span>X_{2} is also neutral so 2X+Y= 0
we know X=-3 So, 2(-3)+Y=0
-6+y=0
Y=+6 charge

 
Answer: The valency of X is -3. The valency of Y is 6
7 0
3 years ago
Which statement below describes an atomic emission spectra?
xxTIMURxx [149]

ANSWER- B

Atomic emission spectra are produced when excited electrons return to the ground state. The emitted light corresponds to energies of the specific electrons.

3 0
3 years ago
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