What is the very small center core of an atom is called?

Answers

Answer 1

Answer: the small part in the center of the atom is called a nucleus

Answer 2

Answer: The very small center core of an atom is called the nuclues, where the protons and neutrons are located.

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Which statement correctly describes a solution with a pH of 9?(1) It has a higher concentration of H3O+ than OH– and causes litmus to turn blue.(2) It has a higher concentration of OH– than H3O+ and causes litmus to turn blue.(3) It has a higher concentration of H3O+ than OH– and causes methyl orange to turn yellow.(4) It has a higher concentration of OH– than H3O+ and causes methyl orange to turn red.

At STP, which sample contains the same number of molecules as 3.0 liters of hydrogen gas?

Answers

1. 5.6 L of NO2(g)
2. 7.5 L of H2(g)
3. 11.2 L of N2(g)
4. 22.4 L of CO(g)

How does temperature change affect waters cohesion?

Answers

the special property of water as universal solvent is because of the existing hydrogen bonding between oxygen and hydrogen molecules. Adhesion and cohesion are one of the repercussions of hydrogen bonding. Higher temperature causes hydrogen bonds to break while lower thresholds causes them to stabilize the bonds.

One of the first labs to analyze oxygen consumption was

Answers

Answer:

One of the first labs to analyze oxygen consumption was established by Lavoisier and Laplace in the late 18th century.

Explanation:

Final answer:

Initial laboratories studying oxygen consumption used innovative techniques, such as isotope tracers, and advanced equipment, such as respirometers, to examine various organisms and processes. Renowned scientist Mildred Cohn played a crucial role in this early research, providing insights into metabolic pathways and enzyme mechanisms.

Explanation:

The first labs to investigate oxygen consumption studied a variety of concepts and organisms. Pioneering this study, Mildred Cohn made significant discoveries utilizing isotopes as tracers in reactions. This strategy provided invaluable insights into metabolic pathways and enzyme mechanisms. Specifically, this strategy was used to understand the phosphorylation of glucose in mitochondria.

The respirometer is an essential tool in measuring oxygen consumption. In an experiment conducted in a laboratory, mice were used to observe the respiration levels at different temperatures. This was done by tracking the volume of oxygen each mouse consumed over multiple five-minute trials.

Also, oxygen consumption in humans can be combined with our understanding of our digestive process. The energy humans and other organisms need to function normally is generated through the gradual oxidation of chemical compounds in the body. Oxygen acts as the ultimate oxidizing agent in these reactions, linking to our digestion and energy conversion processes.

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A plate moves south at a rate of 2 cm/year. How many meters south from its original location will the plate be in 4,000 years? 8,000 meters south 4,000 meters south 200 meters south 80 meters south

Answers

The distance (in meters south) the plate will be given that the plate is moving at a rate of 2 cm/year is 80 meters south (last option)

How do i determine the distance?

Speed is defined as distance travelled per unit time. This is mathematically written as

Speed = Distance travelled / time

If we make distance the subject, we have

Distance travelled = Speed × time

The following data were obtained from the question:

Speed of plate = 2 cm/year = 2 / 100 = 0.02 m/year
Time = 4000 years
Distance travelled =?

Distance travelled = Speed × time

Distance travelled = 0.02 × 4000

Distance travelled = 80 meters south

Thus, we can conclude that the distance travelled is 80 meters south (last option)

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the plate will be 80 meters south from its original location in 4,000 years. The correct answer is (d) 80 meters south.

The plate moves south at a rate of 2 cm/year. To find out how many meters south it will be in 4,000 years, we need to convert the years to centimeters and then meters.

In 4,000 years, the plate will have moved: 2 cm/year x 4,000 years = 8,000 cm.

Now, to convert 8,000 cm to meters, we need to divide by 100 (since there are 100 centimeters in a meter):

8,000 cm / 100 = 80 meters.

So, the plate will be 80 meters south from its original location in 4,000 years. The correct answer is (d) 80 meters south.

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Complete question is:

A plate moves south at a rate of 2 cm/year. How many meters south from its original location will the plate be in 4,000 years?

a. 8,000 meters south

b. 4,000 meters south

c. 200 meters south

d. 80 meters south

What are the two categories of observations? a. qualitative and quantitative b. direct and indirect c. sensory and derived d. measured and deduced

Answers

Three main approaches are available for observational research: controlled observations, naturalistic observations, and participant observations. The two categories of observation are qualitative and quantitative. The correct option is A.

The observation approach entails watching, either manually or mechanically, what people actually do or what happens when they buy or consume something. Information is gathered by watching processes in action. Observations might be either qualitative or quantitative. Scientists make both qualitative and quantitative observations to acquire knowledge.

Observations that describe something's "qualities" are referred to as qualitative observations. These wouldn't involve counting or measuring and would instead contain qualities like texture, color, and shape. Utilizing standard scales to count or measure is a requirement for quantitative observations.

Thus the correct option is A.

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The correct answer is:

qualitative and quantitative.

Explanation:

Observation is the rapid retrieval of information from a first source. In living beings, observation contracts the senses. In science, observation can also include the recording of data via the use of scientific tools. Qualitative observation is a personal process of collecting data or knowledge while quantitative observation is an objective process of accumulating data or information.

The concentration of hydrogen peroxide (H2O2) can be determined by titrating it with an acidified MnO4− solution. The following is an unbalanced equation. MnO4− (aq) + H2O2 (aq) → O2 (g) + Mn2+ (aq)

(a) Balance the above redox reaction.
(b) Determine the concentration of H2O2 solution in molarity if 10.00 mL of this solution requires 20.00 mL of 1.5 M MnO4− for a complete reaction.