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marishachu [46]
3 years ago
9

For the Redi experiment , Match the experiment to it’s description?

Chemistry
1 answer:
Yuki888 [10]3 years ago
6 0
The answer for #1 description is Hypothesis: Redi's hypothesis is that flies can only be produced by other flies.  
The answer for #2 description is Control: The control group was the meat in the container with no covering, thus leaving it open to the flies. 
The answer for #3 description is Independent Variable: The independent variable is covering the meat in the container with a mesh so the flies can't get to it. 
The answer for #4 description is Dependent Variable: The dependent variable is the presence of maggots on the meat that is observed in response to the independent variable. 
The answer for #5 description is Constants: The constants or factors that are kept the same for both groups are the location of containers and temperature, so that it was not one of these that caused the change. 
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How do I find the answer for question 3 and 4?
r-ruslan [8.4K]

Q3) 1.5 mL from the 1.00 M HCl stock solution

Q4) 0.15 mL from the 1.00 × 10⁻¹ M NaOH stock solution

Explanation:

Q3) Determine the amount of 1.00 M HCl stock solution needed to form 100 mL of 1.50 × 10⁻² M HCl solution.

Q4)  Determine the amount of 1.00 × 10⁻¹ M stock NaOH solution needed to form 100 mL of 1.50 × 10⁻² M NaOH solution.

To solve both of the questions we use the following formula:

initial concentration × initial volume =  final concentration × final volume

For Q3 we have:

initial concentration = 1.00 M HCl

initial volume = ?

final concentration =  1.50 × 10⁻² M HCl

final volume = 100 mL

1.00 × initial volume = 1.50 × 10⁻² × 100

initial volume = ( 1.50 × 10⁻² × 100) / 1.00

initial volume = 1.5 mL from the 1.00 M HCl stock solution

For Q4 we have:

initial concentration = 1.00 × 10⁻¹ M NaOH

initial volume = ?

final concentration =  1.50 × 10⁻² M NaOH

final volume = 100 mL

1.00 × 10⁻¹ × initial volume = 1.50 × 10⁻² × 100

initial volume = ( 1.50 × 10⁻² × 100) / 1.00 × 10⁻¹

initial volume = 0.15 mL from the 1.00 × 10⁻¹ M NaOH stock solution

Learn more about:

determining molar concentrations

brainly.com/question/3998372

#learnwithBrainly

3 0
3 years ago
How many grams of Zn are in 0.356 mole of Zn?
Darina [25.2K]

Answer:

23.3 g

Explanation:

0.356 mole × 65 = 23.3 g

6 0
2 years ago
Lile would not be possible on Earth without the water that covers much of its surface, and the air that surrounds it. Earth's wa
9966 [12]

Answer:

Option D:

evaporation from lakes and rivers

Explanation:

The water cycle is a natural cycle that shows how water moves and circulates within a natural environment. Water usually moves between the hydrosphere and the atmosphere through evaporation and condensation.

When water evaporates from the hydrosphere (the water bodies), it goes up into the atmosphere where it cools to become clouds. As more water evaporates, the clouds formed increase in mass. Once the clouds are too heavy to be held up in the sky, they fall down as precipitation (rain, snow, hail) into the water bodies and surrounding land below.

3 0
2 years ago
Please help Me I really need it
butalik [34]
Can you show the question that goes with those answer pls
7 0
2 years ago
Group 7A (17) elements can gain one electron to attain a noble gas electron configuration. In combination with metal atoms that
Iteru [2.4K]

Answer:

The two statements are all True for group 7 and 8 elements.

Explanation:

The Group 7 elements are known as the halogens. They are reactive non-metals and are always found in compounds with other elements. Chlorine, bromine and iodine are all halogens.

Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals. The term ‘halogen’ means 'salt former'.

In addition to the discription given to norble gases in the question which is true, norble gases;

  •     are inert gases located on the right of the periodic table.
  •     have a full-set of valence electrons, so they're stable, unreactive
  •     are colorless, odorless and tasteless.
  •     have low melting and low boiling points.
  •     can be found in small amounts in the Earth's crust and the Earth's atmosphere.
5 0
3 years ago
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