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Pavel [41]
3 years ago
11

The two algae seen here are classified as green algae. That means they make their own food by photosynthesis. The algae on the l

eft is one-celled, or unicellular. The algae on the right is many-celled, or multicellular.
How are these two types of algae different?
Question 5 options:

Only the the multicellular algae contains a chloroplast.


They are different only in how many cells make up each algae.


Only the multicellular algae has chlorophyll for photosynthesis.


The multicellular algae cel has many more parts than the unicellular algae.

Chemistry
2 answers:
ohaa [14]3 years ago
6 0

Answer:

C

Explanation:

Unicellular algae can't do photosynthesis because it is a single cell organisms, therefore the answer is C

vodka [1.7K]3 years ago
4 0

Answer:

b

Explanation:

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3. Which of the following statements is correct?
3241004551 [841]

Answer:

3. 2.00 L of air at 100°C has twice the pressure of the same 2.00 L of air at  50°C

Explanation:

1)  doubling the pressure of a gas doubles its volume

This is incorrect because by increasing the pressure volume is going to be decreased.

2)  2.00 L of air at 227°C has twice the pressure of the same 2.00 L of air at  23°C

This is also incorrect because 2 L air at 227 °C will have the pressure more than twice time as compared to the 2L air at 23°C.

3. 2.00 L of air at 100°C has twice the pressure of the same 2.00 L of air at  50°C

This is correct;

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

thus, by increasing the temperature pressure is also goes to increase in the same ratio.

4. halving the pressure of a gas halves its volume

This is incorrect because halving the pressure of gas increasing its volume.

6 0
3 years ago
12dm3 ethene reacts with steam to make 18.4g ethanol.find the percentage yield
Veronika [31]

% yield = 74.35

<h3>Further explanation</h3>

Given

12 dm³ ethene = 12 L

18.4 g ethanol(actual)

Required

The percentage yield

Solution

Reaction

C₂H₄(g) + H₂O(g) ⇒ C₂H₅OH(g)

Assume at STP, 1 mol gas = 22.4 L

mol ethene :

= 12 L : 22.4 L

= 0.538

From equation, mol ratio C₂H₅OH : C₂H₄ = 1 : 1, so mol C₂H₅OH = 0.538

Mass Ethanol (MW=46 g/mol) ⇒ theoretical

= 0.538 x 46

= 24.748 g

% yield = (actual/theoretical) x 100%

% yield = (18.4/24.748) x 100%

% yield = 74.35

3 0
3 years ago
what happens to the particles in a substance when the substance changes from a liquid phase to gaseous phase?
EleoNora [17]

Answer:

The particles gain more kinetic energy and they move around faster

3 0
3 years ago
Identify the scientific law that is used in the process of balancing chemical equations.
natita [175]

Answer:

Law of Conservation of Mass

Explanation:

Law states that matter cannot be created or destroyed.  So when you balance an equation, you are making sure you have the same number of atoms for each element on each side of the equation.

8 0
2 years ago
Given the equations below, which description applies to the conversion of diamond to graphite? C(s, diamond) + O2 (g) → CO2 (g),
Varvara68 [4.7K]

ans D) the process is endothermic

C(s, diamond + O2 (g)-->CO2(g),∆H= -395.5kJ

7 0
3 years ago
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