CHEMISTRY HIGH SCHOOL

Within a particular compound, an atom gives up two electrons. This atom is A. part of a covalent compound.
B. positively charged.
C. negatively charged.
D. not part of an electrolyte.

Answers

Answer 1
Answer:

Answer:

The correct answer is option B. positively charged.

Explanation:

Hello!

Let's solve this!

When an atom yields its electrons, it yields part of its negative charge. Therefore, it immediately transforms into a positively charged ion.

This positively charged ion is called cation.

We conclude that the correct answer is option B. positively charged.
Answer 2
Answer: Positively charged due to donating two electrons and becoming an ion.

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Commercial fertilizers, which are made by humans, are used to enrich soil for healthier crops. However, erosion may carry the fertilizer chemicals to the oceans. The presence of these chemicals may cause certain kinds of algae to reproduce rapidly. This decreases the amount of oxygen in the water, which can cause organisms that depend on it, like fish, to die.Which statements describe the impact of the use of fertilizers? Select two options.

It improves the growth of crops.
It provides more food for fish.
It causes erosion and washes away soil.
It causes the death of crops.
It harms organisms that live in the oceans.

Answers

The statements that describe the impact of the use of fertilizers are as follows:

  • It harms organisms that live in the oceans
  • improves the growth of crops

What is the effect of eutrophication?

Eutrophication is the process that involves the addition of artificial or natural nutrients, mainly phosphates, through detergents, fertilizers, or sewage, to an aquatic system.

According to this question, commercial fertilizers, which are made by humans, are used to enrich soil for healthier crops. However, erosion may carry the fertilizer chemicals to the oceans which leads to eutrophication.

This eutrophication may cause certain kinds of algae to reproduce rapidly, hence, having the following impacts:

  • It harms organisms that live in the oceans due to reduced oxygen content.
  • improves the growth of crops due to excessive nutrients

Learn more about eutrophication at: brainly.com/question/13232104

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Answer: 1 and 5

Explanation:

Just took it

Which of the following is not an example of a chemical change? Burning paper

Roasting marshmallows

Cutting paper

Baking cookies

Answers

The correct answer is cutting paper because it is an example of a physical change. A physical change is a change a change in the properties of matter that does not change the identity of the substance. On the other hand, chemical change is a change where the substance changes in identity after undergoing a process..

The shape of the nucleus is maintained byA. the nucleolus.

B. the nuclear lamina.

C. the nuclear envelope.

D. the endoplasmic reticulum.

Answers

B. the necular lamina

Explain the four quantum numbers

Answers

 Principal (shell) quantum number - n 
 

Describes the energy level in the atom (1 through 7)The maximum number of electrons in n is 2n2  
2. Angular (subshell) quantum number - l 
 Describes the sublevel in nEach energy level has n sublevels  
3. Magnetic quantum number - m 
 Describes the orbital within ls has 1 orbitalp has 3 orbitalsd has 5 orbitalsf has 7 orbitals  
4. Spin quantum number - s 
 Describes the spin of the electrons in an orbital.Electrons in the same orbital must have oppisite spins.Possible spins are clockwise or counterclockwise.

Calculate the decrease in temperarure when 2.00 L at 20.0 degrees celsius is compressed to 1.00 L.

Answers

I suspect that the pressure of this change is constant therefore

The equation is used from the combined gas law. (When pressure is constant both P's will cancel out P/P = 1)
V/T = V/T
Initial   Change

Initially we have 2L at 20 degress what temperature will be at 1L.

2/20 = 1/T
0.1 = 1/T
0.1T = 1
T = 1/0.1
T = 10 degress celsius.

Hope this helps if you won't be able to understand what is the combined gas law just tell me :).

Final answer:

Using Charles's law, the calculation indicates a decrease in temperature by about 146.58 degrees Celsius when a 2.00 L volume of gas at 20.0 degrees celsius is compressed to 1.00 L.

Explanation:

To calculate the decrease in temperature due to compression, we can utilize Charles's Law, provided we are ignoring any changes in pressure. Initially, we have a volume (V₁) of 2.00 L at a temperature (T₁) of 20.0 degrees celsius which is equivalent to 293.15 K (converting to Kelvin). The volume is then compressed to 1.00 L (V₂) and we need to find the new temperature (T₂).

According to Charles' Law (V₁/T₁ = V₂/T₂), after we input the values from the problem, we can isolate T₂, resulting in following equation: T₂ = (V₂* T₁)/ V₁. Substituting the given values, we get T₂ = (1.00L*293.15 K)/2.00 L = 146.57 K.

However, we want to find the decrease in temperature in celsius. Difference in temperature in Celsius and Kelvin scales are the same. So, the decrease in temperature (ΔT) = T₁ - T₂ = 20.0°C - (-126.58°C) = 146.58°C. So, when the volume of the gas is compressed from 2.00 L to 1.00 L, the temperature decreases by about 146.58 degrees Celsius.

Learn more about Charles's Law here:

brainly.com/question/16927784

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Fill in the Blank. 1. You want to be shielded from all three types of nuclear radiation. If you find shielding that blocks _________________ radiation, then it will most likely also block the other two types. 2. When nuclear radiation enters the tube of a Geiger counter, it ____________________ the atoms of the gas contained in the tube. 3. The particles that make up protons and neutrons and are thought to be basic units of matter are ____________________.

Answers

1.  If you find shielding that blocks gamma radiation,then it will most likely also block the other two types. (as the hardest radiation)
2. When nuclear radiation enters the tube of a Geiger counter, it the excited atoms of the gas contained in the tube. (this type deposits all energy into a single atom)
3 The particles that make up protons and neutrons and are thought to be basic units of matter are quarks.
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