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NikAS [45]
3 years ago
11

Help please due today

Chemistry
2 answers:
marta [7]3 years ago
4 0
Breaks down large molecules into smaller molecules
Usimov [2.4K]3 years ago
3 0
The one abt respiration the answer is the first one and circulatory system is the last one that says “delivery molecules …”
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The model of the atom where the central core contains protons and neutrons surrounded by a cloud of electrons is best described
WITCHER [35]
I am thinking the answer is B. I think this because Bohr had a model similar, but his was lacking the cloud of electrons. His just had electrons orbiting the nucleus. 
I hope this is right!<span />
4 0
4 years ago
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What element is tungsten
VikaD [51]

Tungsten, or wolfram, is a chemical element with symbol W and atomic number 74. The name tungsten comes from the former Swedish name for the tungstate mineral scheelite, tung sten or "heavy stone".


Pasted from bing btw

3 0
3 years ago
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What assumptions do we make in order to use the Henderson-Hasselbalch equation? a. Both the weak acid and its conjugate base are
zepelin [54]

Answer:

The final and initial concentration of the acid and it's conjugate base are approximately equal, that is we use the weak acid approximation.

Explanation:

The Henderson-Hasselbalch is used to calculate the pH of a buffer solution. It depends on the weak acid approximation.

Since the weak acid ionizes only to a small extent, then we can say that [HA] ≈ [HA]i

Where [HA] = final concentration of the acid and [HA]i = initial concentration of the acid.

It also follows that [A^-] ≈ [A^-]i where [A^-] and[A^-]i refer to final and initial concentrations of the conjugate base hence the answer above.

7 0
3 years ago
Does The nucleus of an atom contain all of the protons in the atom
Rina8888 [55]

i think so.

i learned this recently and my textbook says that neutrons and protons are in the nucleus and electrons orbit around the nucleus. :)

i hope i was able to help

6 0
3 years ago
2. Draw a picture of your home. Where does the sun rise relative to your house? Where does the sunset? On the picture, indicate
Semmy [17]

Answer:

sun rises in the east so to the right of the front of your house and sets to the left which is south.

Explanation: what i just said

8 0
3 years ago
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