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
mixer [17]
3 years ago
12

In addition to the six elements most prevalent in living things there are other elements that are required for human life. Which

element is necessary for humans to maintain a strong skeletal system?
A. xenon
B. calcium
C. rhodium
D. chlorine
Chemistry
2 answers:
d1i1m1o1n [39]3 years ago
5 0
B. Calcium! I hope this help.
If your bones don't have enough calcium you get osteoporosis. 
vitfil [10]3 years ago
5 0

Answer:

Calcium

Explanation:

Calcium is needed in our body to make bones (skeletal system) and teeth strong. Apart from making bones and teeth strong, it is required in other body functions such as:

Enabling blood to clot

Helping in muscle contraction

Helping heart muscle in maintaining normal heart beat

About 99% of calcium present in the body is stored in bones. Calcium is stored in bones in the form of calcium phosphate.

Bones continuously replace old calcium with new one. Calcium is not produced in our body. It comes from daily diet, therefore, it essential to take calcium rich diet.

You might be interested in
hey yall .......................................................................................................................
Vilka [71]

Answer:

uhhh im not a boy ima just answer this for points

Explanation:

:))))

3 0
3 years ago
Read 2 more answers
For the reaction A +B+ C D E, the initial reaction rate was measured for various initial concentrations of reactants. The follow
lora16 [44]

Answer:

Rate constant of the reaction is 3.3\times 10^{-3} M^{-2} s^{-1}.

Explanation:

A + B + C → D + E

Let the balanced reaction be ;

aA + bB + cC → dD + eE

Expression of rate law of the reaction will be written as:

R=k[A]^a[B]^b[C]^c

Rate(R) of the reaction in trail 1 ,when :

[A]=0.30 M,[B]=0.30 M,[C]=0.30 M

R=9.0\times 10^{-5} M/s

9.0\times 10^{-5} M/s=k[0.30 M]^a[0.30 M]^b[0.30 M]^c...[1]

Rate(R) of the reaction in trail 2 ,when :

[A]=0.30 M,[B]=0.30 M,[C]=0.90 M

R=2.7\times 10^{-4} M/s

2.7\times 10^{-4} M/s=k[0.30 M]^a[0.30 M]^b[0.90 M]^c...[2]

Rate(R) of the reaction in trail 3 ,when :

[A]=0.60 M,[B]=0.30 M,[C]=0.30 M

R=3.6\times 10^{-4} M/s

3.6\times 10^{-4} M/s=k[0.60 M]^a[0.30 M]^b[0.30 M]^c...[3]

Rate(R) of the reaction in trail 4 ,when :

[A]=0.60 M,[B]=0.60 M,[C]=0.30 M

R=3.6\times 10^{-4} M/s

3.6\times 10^{-4} M/s=k[0.60 M]^a[0.60 M]^b[0.30 M]^c...[4]

By [1] ÷ [2], we get value of c ;

c = 1

By [3] ÷ [4], we get value of b ;

b = 0

By [2] ÷ [3], we get value of a ;

a = 2

Rate law of reaction is :

R=k[A]^2[B]^0[C]^1

Rate constant of the reaction = k

9.0\times 10^{-5} M/s=k[0.30 M]^2[0.30 M]^0[0.30 M]^1

k=\frac{9.0\times 10^{-5} M/s}{[0.30 M]^2[0.30 M]^0[0.30 M]^1}

k=3.3\times 10^{-3} M^{-2} s^{-1}

7 0
3 years ago
Why is amniocentesis a more widely used test than cvs?
maw [93]
Higher probability of loss. Chorionic villus sampling (CVS) and Amniocentesis (AC). The prenatal diagnosis technique can be done earlier in fetal development CVS (first trimester --> 10-13 weeks). AC (second trimester --> 16-20 weeks)

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
4 0
3 years ago
A alkaline earth metal is an element is groups 3-12 of the periodic table true or false?
Karo-lina-s [1.5K]

False Alkaline earth metals is group 2

5 0
3 years ago
(2. Which of the following best describes humus?
Harlamova29_29 [7]

Answer:

A. Decomposed organic matter

Explanation:

6 0
3 years ago
Other questions:
  • Treatment of 2-hexanone with naoch2ch3 followed by ch3br affords compound x (c7h14o) as the major product. x shows a strong abso
    13·1 answer
  • Two gas jars are connected to each other, but they are separated by a closed valve. One gas jar contains oxygen, and the other i
    5·1 answer
  • WILL AWARD BRAINLIEST HELPPPP
    15·2 answers
  • According to the label on a bottle of concentrated hydrochloric acid, the contents are 36% by mass and have a density of 1.138g/
    8·1 answer
  • To prepare an acetic acid/acetate buffer, a technician mixes 30.6 mL of 0.0880 acetic acid and 21.6 mL of 0.110 sodium acetate i
    15·1 answer
  • Why are the offspring produced by sexual reproduction different than their parents?
    10·1 answer
  • Question 4<br> How many carbon-carbon triple bonds are present in a molecule of 4,5-diethyloctane?
    13·1 answer
  • Can someone help with this please? greatly appreciated!
    11·1 answer
  • 2 of 4
    7·1 answer
  • Which best describes the law of conservation of mass?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!