1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harman [31]
3 years ago
5

Please help me with these questions I don't get science

Chemistry
2 answers:
ipn [44]3 years ago
6 0

There are at least 60 elements in our bodies.

Other elements may be present, but in such small quantities that we cannot detect them with current technologies.

The six most abundant elements (by mass) in our bodies are:

Oxygen           65    %

Carbon            18    %

Hydrogen       10    %

Nitrogen          3.2 %

Calcium           1.4 %

Phosphorus    <u>1.1  % </u>

TOTAL =      99     %

LiRa [457]3 years ago
4 0
Proteins are made of carbon, hydrogen,oxygen, and nitrogen (CHON). Nucleic acids such as DNA and RNA contain carbon,hydrogen, oxygen, nitrogen, and phosphorus(CHON P). The body also needs trace amounts of other elements such as calcium,potassium, and sulfur for proper functioning of muscles, nerves, etc.
You might be interested in
Acid-base neutralization means having a pH of 7. true or false ?
Aleks04 [339]

Answer:

True

Explanation:

A pH of 7 is greater than basic but lesser than acidic. Therefore, it's neutral

8 0
3 years ago
Read 2 more answers
Whitney's lung capacity was measured as 3.3 l at a body temperature of 37 ∘c and a pressure of 746 mmhg . how many moles of oxyg
myrzilka [38]

the ideal gas equation is PV=nRT  
 where P=pressure  
 V=Volume  
 n=no. of moles  
 R=universal gas constant  
 T=temperature  
 The universal gas constant (R) is 0.0821 L*atm/mol*K    
 a pressure of 746 mmhg =0.98 atm= 1 atm (approx)   
 T=37 degrees Celsius =37+273=310 K (convert it to Kelvin by adding 273)    
 V=0.7 L (only getting oxygen, get 21% of 3.3L)    
 Solution:  
 (1 atm)(0.7 L)=n(0.0821 L*atm/mol*K)(310 K)  
 0.7 L*atm=n(25.451 L*atm/mol)  
 n=0.0275 mole   
 Answer:   
n=0.0275 mole of oxygen in the lungs.
4 0
3 years ago
Earth's first semi-permanent atmosphere consisted of abundant water vapor, carbon dioxide, nitrogen, ammonia, and traces of meth
statuscvo [17]
Organic compounds from the Cambrian era
7 0
3 years ago
describe covalent and ionic bonding. include how it works, any key terms and how you can identify each bond ( hard, soft, rigid,
Katena32 [7]
A covalent bond is a bond between 2 non metals, they share electrons. Ionic bonding occurs between a metal and a non-metal, and they transfer electrons. 
5 0
3 years ago
Read 2 more answers
Can someone help me with 6 &amp; 7 ?
grin007 [14]

6. V = IR= 1.2×100= 120 V

i tried my best, hope it helps!

5 0
3 years ago
Other questions:
  • A gas is located inside a closed container. if the gas is allowed to occupy more volume inside the container, what will happen t
    15·1 answer
  • Here is a chemical formula 3CO2 to the coefficient in the formula is
    13·1 answer
  • Round off each of the following numbers to two significant figures:
    8·2 answers
  • What happens to energy when matter undergoes a chemical or physical change?
    10·1 answer
  • what will happen if potato strips are placed in a solution of the same concentration as the content of the potato
    10·1 answer
  • Which atom in each pair that has the greater electronegativity.
    15·1 answer
  • When a car goes around a curve at a constant speed, in which direction is it accelerating
    5·1 answer
  • How many oxygen atoms are in diiodine heptoxide?​
    13·1 answer
  • 6
    11·1 answer
  • What mass of oxygen reacted with the 8.40 grams of c
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!