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dezoksy [38]
3 years ago
5

Animal cells do not have a ____ or ____, but plant cells do

Chemistry
2 answers:
aalyn [17]3 years ago
6 0
The cell wall, chloroplasts, and plastids are present in plant cells but not in animal cells. 
Dmitry_Shevchenko [17]3 years ago
5 0

Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not. :)

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b) If 1.5 mole of oxygen reacted, how many mole of iron (III) oxide would be formed from the reaction?
lyudmila [28]

Answer:

If there reacted 1.5 moles of O2, there will be produced 1.0 mol of Fe2O3

Explanation:

Step 1: Data given

Number of moles oxygen reacted = 1.5 moles

Step 2: The balanced equation

4Fe + 3O2 → 2Fe2O3

Step 3: Calculate moles of Fe2O3

For 4 moles Fe consumed, we need 3 moles of O2 to produce 2 moles of Fe2O3

For 1.5 moles O2 consumed, we'll have 2/3 * 1.5 = 1.0 mol of Fe2O3

If there reacted 1.5 moles of O2, there will be produced 1.0 mol of Fe2O3

7 0
3 years ago
Does anyone have any idea what this means lol
miv72 [106K]

Answer:

29.42 Litres

Explanation:

The general/ideal gas equation is used to solve this question as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K

According to the information provided in this question;

mass of nitrogen gas (N2) = 25g

Pressure = 0.785 atm

Temperature = 315K

Volume = ?

To calculate the number of moles (n) of N2, we use:

mole = mass/molar mass

Molar mass of N2 = 14(2) = 28g/mol

mole = 25/28

mole = 0.893mol

Using PV = nRT

V = nRT/P

V = (0.893 × 0.0821 × 315) ÷ 0.785

V = 23.09 ÷ 0.785

V = 29.42 Litres

6 0
3 years ago
How are journals helpful to scientists
Fofino [41]
They help keep track of notes and experaments
8 0
3 years ago
What happens when the temperature of a solid reaches its melting point
Stells [14]

Answer:

The solid will start to transition from a solid to a liquid.

Explanation:

When a solid reaches the point of its melting point, the substance will start to turn into liquid form. As long as energy is constantly added, it will soon turn fully liquid. However, when it reaches it melting point, it will flip back and forth from solid to liquid form (solid to liquid equilibrium) until the energy added allows it to become fully liquid.

Take H2O for example. The melting point of solid water is 0°C. At that point, the solid ice starts to turn into water, but still is kinda solid and the ice shape is still there. When it is continuously heated (add energy), it will turn into liquid H2O.

6 0
3 years ago
Can car oil degrade carbon fiber?​
KonstantinChe [14]
Yes, car oil can degrade carbon fiber
4 0
3 years ago
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