DUE TODAYYYI need help with the questions 10 below also Can you guys please subscribe to my yt channel, its called Madison Henderson. QUESTIONS BELOW, WILL GIVE BRAINLIST AWNSER, DO NOT DO THIS AS A JOKE I WILL REPORT WHICH WILL GET YOUR ACCONT BAN :) : 1. Which of these is an element?
A:NaCl
B:CO2
C. He345
D. H2O

2. Which of these is a molecule AND a compound?
A. He345
B. CO2
C. H5
D. Ne

3. Acetic acid is a compound found in vinegar. The chemical formula for acetic acid is CH3COOH. How many different elements are in acetic acid?
A.3
B.4
C.9
D.14

4. Scientists found four areas around a hydrothermal vent that they thought could support life. The scientists took samples of the elements in the area. Which of these samples is best for finding organic compounds?

A. calcium, hydrogen, oxygen, sulfur
B. iron, hydrogen, oxygen, phosphorus
C. carbon, hydrogen, oxygen, nitrogen
D. helium, hydrogen, oxygen, potassium

5. The chemical equation for cellular respiration is:
Which of these formulas has only 1 molecule of the substance in the equation?
A. C6H1206
B. O2
C. CO2
D. H2O

6. In the chemical equation for #5, which of these are elements?
A. C6H1206
B. O2
C. CO2
D. H2O

7. Complex carbohydrates are large molecules that can be broken down into smaller molecules called .
A. Fats
B. Energy
C. Sugars
D. Vitamins

8. Which function is performed primarily by the digestive system?

A. exchange of gases between the blood and the environment
B. removing wastes from the body
C. breakdown of large molecules into smaller ones
D. Transport of nutrients to cells

9. During digestion & cellular respiration, some of this (in the form of broken down glucose) is released in the form of . Carbon dioxide is given off, along with energy.

A. Chemical Energy / Thermal Energy
B. Mechanical Energy / Potential Energy
C. Thermal Energy / Electromagnetic
D. Nuclear Energy / Thermal Energy

10. Chemical change is any change that results in the .

A. Formation of a new substance
B. Internal structure staying the same
C. Heating of substance (like boiling water)
D. Formation of a high pitched noise

Please don't take a long time, I have to submit soon! thank you and have a good day! :)