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
eduard
3 years ago
12

Which organisms are the best example of producers in a food web? A. zooplankton B. krill C. killer whales D. marine phytoplankto

n
Chemistry
2 answers:
notsponge [240]3 years ago
5 0
D. Marine phytoplankton
Tems11 [23]3 years ago
3 0
D Marine Phytoplanton
You might be interested in
Which part of the atmosphere is the highest layer in which planes fly
denis23 [38]
The layer of atmosphere that MOST planes fly in is called the troposphere.
6 0
3 years ago
Read 2 more answers
Help!!! I need the answer for "explain how using the periodic table can help answer this question"
Tanzania [10]
Well a compound is 2 or more different molecules together. So if you see a periodic table you will see the elements to see if they are the same or not.
3 0
3 years ago
Lead has a density of 11.4 g/cm^3. What is the density in kilograms per cubic meter?
Vikentia [17]

The density in kg/m³ = 1.14 x 10⁴

<h3>Further explanation  </h3>

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of density  

The unit of density can be expressed in g/cm³ or kg/m³  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density , g/cm³ or kg/m³  

m = mass  , g or kg

v = volume  , cm³ or m³  

A density of Lead : ρ = 11.4 g/cm³

the density in kg/m³ :

\tt 11.4~\dfrac{g}{cm^3}\times \dfrac{kg}{10^3~g}\times \dfrac{cm^3}{10^{-6}~m^3}=\boxed{\bold{1.14\times 10^4~\dfrac{kg}{m^3}}}

8 0
3 years ago
An aqueous solution is listed as being 33.8% solute by mass with a density of 1.15 g/mL, the molar mass of the solute is 145.6 g
vodomira [7]

Answer:

A) 2.69 M

B) 0.059

Explanation:

A) We have:

33.8% solute by mass= 33.8 g solute/100 g solution

molarity = mol solute/ 1 L solution

molarity= \frac{33.8 g solute}{100 g solution} x \frac{1.15 g solution}{1 ml} x \frac{1 mol solute}{145.6 g solute} x \frac{1000 ml}{1 L}

molarity= 2.69 mol solute/L solution = 2.69 M

B) We know that there are 33.8 g of solute in 100 g of solution.

As the total solution is compounded by solute+solvent (in this case, solvent is water), the mass of water is the difference between the mass of the total solution and the mass of solute:

mass of water= 100 g - 33.8 g = 66.2 g

Now, we calculate the number of mol of both solute and water:

mol solute= 33.8 g solute x \frac{1 mol solute}{145.6 g} = 0.232 mol

mol H20= 66.2 g H₂O x \frac{1 mol H2O}{18 g}

Finally, the mol fraction of solute (Xsolute) is calculated as follows:

Xsolute=\frac{mol solute}{total mol}= \frac{mol solute}{mol solute + mol H2O}=\frac{0.232 mol}{0.232 mol + 3.677 mol}

Xsolute= 0.059

4 0
2 years ago
Channel on Earth Formed by Flowing Lava
nignag [31]

Answer:

River bed

Explanation:

i dont really know its just what i learned

4 0
2 years ago
Other questions:
  • What is the term for the amount of energy that is needed for a chemical reaction to occur?
    10·1 answer
  • During an investigation a scientist heated 27 g of mercuric oxide till it decomposed to leave a dry product. The total mass of t
    6·2 answers
  • I have no idea what to do please help me quickly!
    15·2 answers
  • How many moles are in 68.5g of KOH?
    13·2 answers
  • What is 1500 in scientific notation
    9·1 answer
  • I need help with science
    12·2 answers
  • What form of pollution can lichens be a good indicator of?
    15·1 answer
  • Select the keyword or phrase that will best complete each sentence. law is a gas law that relates pressure and volume and states
    9·1 answer
  • Label the picture, please
    13·2 answers
  • in a petri dish, a certain type of bacterium doubles in number every 30 minutes. there were originally 16, or 2^4, bacteria in t
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!