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NARA [144]
3 years ago
7

Where are most algae found?

Chemistry
2 answers:
vladimir2022 [97]3 years ago
8 0

Answer:

on the surface of lakes

Explanation:

Pavlova-9 [17]3 years ago
7 0
On the surface of lakes
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After eating, nutrients must be oved to other parts of the body. Which of the following systems will transport these nutrients.
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The circulatory system
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Scientists make observations, conduct experiments, and draw conclusions. Which statement is true of all scientists?
Vsevolod [243]

Answer:

study the natural world

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3 years ago
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A(n) ______________ is an organism that lives on another organism and causes harm to that organism
RoseWind [281]

Answer: The answer is Parasite ma dude

Explanation:

In evolutionary ecology, parasitism is a symbiotic relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm, and is adapted structurally to this way of life.

Hopes this helps

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3 years ago
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Given SiO2 + 4HF --> SiF4 +2H2O
xxTIMURxx [149]

Answer:

=242.47 g of HF

Explanation:

From the equation One mole of SiO₂ (Silicon (IV) Oxide) react with 4 moles of HF (Hydrogen fluoride).

This is because the reaction ratio is 1:4

The number of moles in182 grams of SiO₂ is:

Number of moles= Mass/RMM

RMM of SiO₂ is 60.08 g/mol

No. of moles=182g/60.08g/mol

=3.0293 moles.

The reaction ratio of SiO₂ to HF is 1:4

Thus the number of moles of HF required to react with  3.0293 moles of SiO₂ is:

(4×3.0293)/1= 12.1172 moles

The mass of 12.1172 moles of HF is.

12.1172 moles× RMM of HF

=12.1172 moles×20.01 g/mol

=242.47 g of HF

4 0
3 years ago
Look at picture for the question
4vir4ik [10]

The amount, in grams, of carbon tetrachloride that would be present, will be 22.99 grams.

<h3>Finding the mass from the number of particles</h3>

For every one mole of any substance, there are 6.022 x 10^{23} atoms of particles. This is according to Avogadro.

Now, there are 9 x 10^{22 particles in this particular carbon tetrachloride.

If 1 mole = 6.022 x 10^{23} particles

Then,

9 x 10^{22 particles =  9 x 10^{22 x 1/6.022 x 10^{23} particles

                       = 0.1495 moles

Carbon tetrachloride has the chemical formula CCl4 and has a molar mass of 153.82 g/mol.

Recall that: mole = mass/molar mass

Hence, mass = mole x molar mass.

Mass of 0.1495 moles CCl4 = 0.1495 x 153.82 = 22.99 grams

More on number of atoms of substances can be found here: brainly.com/question/1445383

#SPJ1

3 0
2 years ago
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