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Svet_ta [14]
3 years ago
8

A cell must work to maintain a stable internal environment. It is also important for the environment around the cell to be stabl

e. What reasoning explains what happens when the concentration of water inside a cell is lower than the concentration of water outside the cell?
The cell loses nutrients.

The cell splits and creates two new cells.

The cell gains too many lipids and carbohydrates.

The cell either loses water and dries up or gains too much water and bursts.

(science 7th grade)
Chemistry
1 answer:
IRINA_888 [86]3 years ago
3 0

Answer: the last one

Explanation: if a cell has too little water, it will begin to function incorrectly, and if a cell has too much water it will burst.

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How many formula units of CaO are in 32.7 g of CaO?
max2010maxim [7]

Answer:

3.51× 10²³ formula units

Explanation:

Given data:

Mass of CaO = 32.7 g

Number of formula units = ?

Solution:

First of all we will calculate the number of moles.

Number of moles = mass/molar mass

Number of moles = 32.7 g/ 56.1 g/mol

Number of moles = 0.583 mol

Number of formula units:

1 mole = 6.022 × 10²³ formula units

0.583 mol ×  6.022 × 10²³ formula units / 1 mol

3.51× 10²³ formula units

The number 6.022 × 10²³ is called Avogadro number.

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What object has a mass of 10 grams and a volume of 2 mL
Elena-2011 [213]

Answer:

Destiny = 5 g/ml

Explanation:

The formula for density is d=

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Final answer:

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3 0
2 years ago
Calculate the amount of grams of water that was used when 5525J of energy was used to boil this amount of water.
djverab [1.8K]

Answer:

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Explanation:

Step 1: Given and required data

  • Energy in the form of heat required to boil the water (Q): 5525 J
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  • Mass of water (m): ?

Step 2: Calculate the mass of water

We will use the following expression.

Q = ∆H°vap × m

m = Q / ∆H°vap

m = 5525 J / (2260 J/g)

m = 2.445 g

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