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3 years ago

Analogy what is a cell like

1 answer:

8 0

The cell membrane is like a wall, keeping the city enclosed. The nucleus is like the mayor's office, governing the city. The mitochondria are like the power company, providing energy. The Golgi apparatus is like the post office, packaging and delivering substances. The endoplasmic reticulum are like roads, allowing transportation.

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Zinc is more active than cobalt and iron but less active than aluminum. Cobalt is more active than nickel but less active than i

mixas84 [53]

Answer:

Option D

Explanation:

For the first statement, the order is:

=> Co < Fe < Zn < Al

For the second statement it is,

=> Ni < Co < Fe

So, combining the order becomes:

=> Ni < Co < Fe < Zn < Al

5 0

3 years ago

What is the freezing point of an aqueous glucose solution that has 25.0 g of glucose?

LiRa [457]

Answer:

$T_f=-2.58\°C$

Explanation:

Hello,

In this case, we can compute the the freezing point depression by using the following formula:

$T_f-T_0=-i*m*Kf$

Whereas the freezing point of pure water is 0 °C van't Hoff factor for glucose is 1, the molality is computed as shown below and the freezing point constant of water is 1.86 °C/m:

$m=\frac{25.0g\ glucose*\frac{1mol\ glucose}{180g\ glucose} }{100g*\frac{1kg}{1000g} }\\ \\m=1.39m$

Thus, the freezing point of the solution is:

$T_f=T_0-i*m*Kf\\\\T_f=0\°C-1*1.39m*1.86\frac{\°C}{m}\\ \\T_f=-2.58\°C$

Regards.

4 0

4 years ago

Help me please:(:(:( with my bellwork<br> for brainiest

Vedmedyk [2.9K]

Answer:

Elements are made of only one kind of atom

Compounds are made of 2 or more elements chemically bonded together

Explanation:

Its right there????

3 0

3 years ago

Consider the reaction 2CuCl2 + 4KI → 2CuI + 4KCl + I2. If 4 moles of CuCl2 react with 4 moles of KI, what is the limiting reacta

Tatiana [17]

Explanation:

here's the answer to your question

4 0

3 years ago

What is sodium oxide when it’s broken down into its elements?

erik [133]

Answer:

Explanation:Typically, manufactured glass contains around 15% sodium oxide, 70% silica (silicon dioxide) and 9% lime (calcium oxide). The sodium carbonate "soda" serves as a flux to lower the temperature at which the silica mixture melts

8 0

3 years ago