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
hichkok12 [17]
4 years ago
11

Which of the following elements, essential to life, is a trace element? Which of the following elements, essential to life, is a

trace element? phosphorus carbon calcium iodine
Chemistry
1 answer:
Vikentia [17]4 years ago
7 0

Answer:

The answer to your question is Iodine

Explanation:

Elements can be classified as:

Basic elements of life: Carbon, Hydrogen, Oxygen and, Nitrogen these elements are in great quantity in the body.

Quantity elements are elements in a medium quantity in the body like Sodium, Magnesium, Potassium, Calcium, Phosphorus, Sulfur and Chlorine.

Trace elements are elements in a low quantity example: Selenium, Iodine, Zinc, Copper, Cobalt, Iron and, Manganese.

You might be interested in
Q: What property of propane does Rodriguez change using the burner? Support your answer with evidence from the text.
UNO [17]

Answer:

The wind is starting to blow stronger, and when you’re riding in a basket under a hot air

balloon, just 400 feet above ground, that’s not necessarily a good thing. Keith Rodriguez looks

to the horizon and squints. He had planned to take off from Scioto Downs, a horse racetrack

south of Columbus, Ohio, fly a few miles north, and land his balloon in a barren cornfield next

to his pickup truck.  

Then the wind changed. Instead of a light breeze from the south, now Rodriguez’s bright red

balloon is getting hit by stronger, colder winds from the west. He has plenty of propane fuel in

his tank—he probably could ride the wind halfway to Pennsylvania. But that would be

dangerous. Rodriguez’s choice of landing sites just became very limited. As the balloon

switches direction and floats east, everything below becomes a wide carpet of suburban

sprawl—big‐box stores, major highways, strip malls. Beyond the stores lie forests.

Explanation:

7 0
3 years ago
Based on the current atomic theory most chemical reaction take place as a result of the interactions of which sub- atomic partic
icang [17]
Electrons, everything is pretty much based around the likeliness of electrons to be swapped or shared between atoms
6 0
3 years ago
Ammonia can be produced in the laboratory by heating ammonium chloride
AnnyKZ [126]

Answer:

Mass = 2.89 g

Explanation:

Given data:

Mass of NH₄Cl = 8.939 g

Mass of Ca(OH)₂ = 7.48 g

Mass of ammonia produced = ?

Solution:

2NH₄Cl   +  Ca(OH)₂     →    CaCl₂ + 2NH₃ + 2H₂O

Number of moles of NH₄Cl:

Number of moles = mass/molar mass

Number of moles = 8.939 g / 53.5 g/mol

Number of moles = 0.17 mol

Number of moles of Ca(OH)₂ :

Number of moles = mass/molar mass

Number of moles = 7.48 g / 74.1 g/mol

Number of moles = 0.10 mol

Now we will compare the moles of ammonia with both reactant.

                      NH₄Cl          :          NH₃

                          2              :           2

                         0.17          :          0.17

                   Ca(OH)₂         :          NH₃

                        1                :           2

                    0.10              :          2/1×0.10 = 0.2 mol

Less number of moles of ammonia are produced by ammonium chloride it will act as limiting reactant.

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 0.17 mol × 17 g/mol

Mass = 2.89 g

6 0
3 years ago
I'll give 40 pts for this one but pls help me....
Ivenika [448]
3 of them left and i just need points lol sorrrry
3 0
3 years ago
PLEASE HELP, I WILL GIVE BRAINLIEST AND THANKS
jasenka [17]

Answer:

23dm

Explanation:

so you have to do 10g +13dm so the you have to times it by 3 three times

3 0
3 years ago
Other questions:
  • Why is it important to avoid consuming sugar?
    12·1 answer
  • What name is given ta a metal strip dipped into a solution of salt​
    6·1 answer
  • Which process takes place when a rechargeable battery is recharged?electrons are pushed onto the positive cathode.electrons are
    14·1 answer
  • What's a design constraint?
    10·1 answer
  • Check all that apply to KCI.
    12·1 answer
  • A student is using a copper strip and a strong chlorine solution in her experiment. Which of these is a chemical property of one
    12·2 answers
  • Examination reveals that 180.2 g/mol of glucose contains 72.1 grams of carbon, 96 g/mol of oxygen and the remainder is hydrogen.
    11·1 answer
  • Sandpaper is a type of rough material that is rubbed on other surfaces to make them smoother. Ms. Fonger is rubbing a piece of s
    10·1 answer
  • vIt is the middle of winter when you go to the store to buy some balloons for a birthday party. After you get to your car with t
    13·2 answers
  • How should you remove a beaker from a hot plate after heating it?.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!