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4 years ago

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

Chemistry

1 answer:

Yuki888 [10]4 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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What are the values for % Cl and % F, respectively, for Sample II?

horsena [70]

Answer:

Explanation:

The mass percentages of chlorine and fluorine:

Given:

Mass of chlorine = 5.753g

Mass of fluorine = 9.248g

Find the total of the masses given:

Total mass = mass of chlorine + mass of fluorine = 5.753 + 9.248 = 15.001g

% of Cl = $\frac{mass of chlorine}{total mass}$ x 100

% of Cl = $\frac{5.753}{15.001}$ x 100 = 38.35%

% of F = $\frac{mass of fluorine}{total mass}$ x 100

% of F = $\frac{9.248}{15.001}$ x 100 = 61.65%

6 0

4 years ago

Prepare a journal about the topic Water-The Life Giving Liquid

Alex

Water is known as a life-giving liquid because every living organism depends on the water for its survival.

<h3>Journal about the topic Water-The Life Giving Liquid</h3>

Water is also called a life-giving liquid because without water life on earth is not possible. All other living organisms need to consume water to survive and grow in size. We need water for many other activities such as cleaning, washing, cooking and irrigation. Water is essential for all living things including humans, animals and plants. Water is called wonder liquid as it can dissolve large number of substances. This property enables water to be a great solvent. Most of the chemical reactions of the living world is carried out in water as a medium so that's why water is known as Life Giving Liquid.

So we can conclude that Water is known as a life-giving liquid because every living organism depends on the water for its survival.

Learn more about water here: brainly.com/question/1313076

#SPJ1

8 0

1 year ago

How many atoms in the pictured molecule can form hydrogen bonds with water molecules anatomy?

garri49 [273]

55..............................

6 0

3 years ago

Which of the following substances has the lowest density?

Likurg_2 [28]

Answer:

C) A mass of 750 g and a volume of 70 dL .

Explanation:

Hello,

In this case, for substantiating the substance having the lowest density we need to compute it in the same units for each case as shown below:

$\rho=\frac{m}{V}$

A) $\rho =\frac{1.5kg}{1.2L}*\frac{1000g}{1kg} *\frac{1L}{1000mL}=1.25g/mL$

B) $\rho =\frac{25g}{20mL}*=1.25g/mL$

C) $\rho =\frac{750g}{70dL}*\frac{10dL}{1L}*\frac{1L}{1000mL} =0.107g/mL$

D) $\rho =\frac{15mg}{25\mu L}*\frac{1g}{1000mg} *\frac{1000\mu L}{1mL}=0.6g/mL$

Therefore, the lowest density corresponds to C) A mass of 750 g and a volume of 70 dL

Regards.

8 0

3 years ago

The electronegativity of nitrogen (N) is 3.0, while the electronegativity of hydrogen (H) is 2.1. Knowing this, consider how the

Ede4ka [16]

Answer:

NH3 is polar due to the bonds between nitrogen and hydrogen which have different electronegativity and due also to its asymmetrical shape.

Explanation:

NH3 is polar as there are 3 dipoles in the ammonia molecule that do not balance each other out.

Considering the N-H bond which is polar because N with an electronegativy of 3.0, is more electronegative than H, with an electronegativity of 2.1. The is overall asymmetrical shape of NH3

means that the dipoles remains unbalanced and do cancel out each other making the NH3 polar.

4 0

4 years ago