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3 years ago

Which area of biotechnology would most likely create ethical concerns? *

Chemistry

1 answer:

Alenkasestr [34]3 years ago

3 0

Answer:

organ cloning for use in transplants.

Explanation:

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What do isotopes of an element have in common? How do they differ?

Nady [450]

Answer:

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.

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3 years ago

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Identify where the sun's rays strike Earth most directly and least directly.

avanturin [10]

<span>Due to the inclination of the solar rays, in the equatorial areas, these rays reach the earth more directly.

In the polar zones, these rays reach the earth less directly, that is, they are quite inclined. That is why near the equator the temperature is high and near the poles is low.</span>

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3 years ago

Substances that cause the oxidation of other substances are

svp [43]

<h3>SUBSTANCE</h3>

==============================

$\large \sf\underline{Question:}$

Substances that cause the oxidation of other substances are;

==============================

$\large \sf\underline{Answer:}$

$\qquad \qquad \huge \bold{Option \: B}$

==============================

$\large \sf\underline{Explanation:}$

Substances that cause the oxidation of other substances are oxidizing agents.

==============================

4 0

2 years ago

A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are A 12.8-g s

coldgirl [10]

Answer: The data are consistent with the law of conservation of mass because the mass of reactants equals the mass of products

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Given: mass of sodium = 12.8 g

mass of chlorine = 19.6 g

mass of reactants = mass of sodium + mass of chlorine = 12.8 g + 19.6 g = 32.4 g

Mass of product = Mass of sodium chloride = 32.4 g

As mass of reactant = mass of products , Thus results are in accordance with the law of conservation of mass.

5 0

3 years ago

What volume of a 0.181 M nitric acid solution is required to neutralize 25.1 mL of a 0.167 M calcium hydroxide solution

Alika [10]

Answer:

46.32 mL

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

2HNO₃ + Ca(OH)₂ —> Ca(NO₃)₂ + 2H₂O

From the balanced equation above,

The following data were obtained:

Mole ratio of the acid, HNO₃ (nA) = 2

Mole ratio of the base, Ca(OH)₂ (nB) = 1

Next, we shall write out the data obtained from the question. This includes:

Molarity of the acid, HNO₃ (Ma) = 0.181 M

Volume of the base, Ca(OH)₂ (Vb) = 25.1 mL

Molarity of the base, Ca(OH)₂ (Mb) = 0.167 M

Volume of the acid, HNO₃ (Va) =?

Finally, we shall determine the volume of the acid, HNO₃ as shown below:

MaVa/ MbVb = nA/nB

0.181 × Va / 0.167 × 25.1 = 2/1

0.181 × Va / 4.1917 = 2

Cross multiply

0.181 × Va = 4.1917 × 2

0.181 × Va = 8.3834

Divide both side by 0.181

Va = 8.3834 / 0.181

Va = 46.32 mL

Therefore, the nitric acid, HNO₃ required for the reaction is 46.32 mL

7 0

3 years ago