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Irina18 [472]
3 years ago
14

C. How many grams of NaOH (sodium hydroxide) are necessary to make 100

Biology
1 answer:
azamat3 years ago
3 0

18 g

Explanation:

Remember that 1g is equivalent to 1 ml;

1g = 1 mL

100 g = 100 mL

Therefore in an 18% NaOH solution,  for every 100 mL, there is 18 g of dissolved NaOH. This is how we derive the percentage solution;

18 g / 100 g = 18%

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How is osmosis different from diffusion
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Diffusion is a spontaneous process in which molecules move with their concentration gradient. For example, if you place food coloring in water, the food coloring will slowly diffuse through the water until the entire solution has been balanced.

Osmosis is specifically the movement of <em>water</em> through a semipermeable membrane - meaning a membrane that can let some substances in but keep others out - and, similar to diffusion, it moves with its concentration gradient. For example, if you place a glucose solution sealed in plastic in water, water will move into the plastic to even out the concentration of glucose in the entire solution because glucose is too large to diffuse freely.

Hope this helped!

7 0
2 years ago
Which of the following describes a rapidly expanding population?
marshall27 [118]
What are the answers

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3 years ago
Dandelions, roses, and tomatoes are examples of dicots. They have a.parallel b. Three part c. Branched veins in their leaves and
Bingel [31]

Answer:

c, a, c

Explanation:

Dandelions, roses, and tomatoes are examples of dicots. They have branched veins in the leaves, and their vascular bundles are arranged in a ring. They have taproots.

Dicots or dicotyledonous plants are a sub-division of the flowering plants with the following characteristics:

  • <em>Their embryos posses two seed leaves or cotyledons.</em>
  • <em>Their flowers parts are usually in multiples of four or five.</em>
  • <em>They posses tap roots which develop from the radicle.</em>
  • <em>The vascular bundles of their stems are usually arranged in concentric rings.</em>
  • <em>The veination of their leaves usually forms a network or branched.</em>

<em>Hence, the correct options are </em><em>c, a</em><em>, and </em><em>c</em><em>.</em>

4 0
3 years ago
A scientist has correctly gone through all the possible steps in a dichotomous key, but has not identified an insect. Which most
liberstina [14]
<span>The insect might be an unknown variation or a new species.</span>
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3 years ago
If humans run out of following resources, which resource would be most difficult to replace
Paha777 [63]

Answer:

Petroleum

Explanation:

Like all fossil fuels, petroleum is a nonrenewable energy resource. This means that it is a resource that cannot be replaced as quickly as humans use up existing supplies. Humans face a problem because once petroleum reserves begin to run out, there won't be enough fuel to power all the automobiles in the world.

4 0
2 years ago
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