CHEMISTRY HIGH SCHOOL

What is the term for heat transfer because of the movement of a gas?

Answers

Answer 1
Answer:

Answer: Convection

Explanation: apex 1/10/2020

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Identify whether the following is an example of qualitative or quantitative data. the taste of an apple:

Answers

In this item we are to identify if the taste of an apple is a qualitative or a quantitative data. In reporting the taste of an apple, we usually do not use some scale or anything but we are only describing the taste. Thus, it is a qualitative data.
Data can be broadly divided into two types. Quantitative data is made up of numbers. Qualitative data is made up of descriptions. In this case, the taste of an apple is an example of qualitative data since it does not involve numbers but instead a description.

Which of the following observations led physicist James Chadwick to perform experiments that eventually led to the discovery of the neutron?A. Protons alone were not able to account for the density of an atoms nucleus.

B. Atomic nuclei possess shells similar to the electron shells of atoms.

C. Some atoms contained more protons than electrons.

Answers

The correct answer is letter C. James Chadwick confirmed the existence of neutrons.In his experiment, he was able to show that the particles that were ejected had no electrical charge but had almost the same mass as the proton. These particles were, of course, neutrons.

What point were the authors of the Declaration trying to make in the Preamble?

HELP.

Answers

Answer:

To explain why they are revolting against the king

Explanation:

A sample of ethanol has a volume of 7.5 mL and a mass of 5.85 g. A sample of benzene also has a volume of 7.5 ml,but has a mass of 6.60 g. Which liquid is denser

Answers

Answer:

Benzene is denser than ethanol.

Explanation:

Given data:

Volume of ethanol = 7.5 mL

Mass of ethanol = 5.85 g

Volume of benzene = 7.5 mL

Mass of benzene = 6.60 g

Which is denser = ?

Solution:

First of all we will calculate the density of both substances.

Density of ethanol:

d = m/v

d = 5.85 g/ 7.5 mL

d = 0.78 g/mL

Density of benzene:

d = m/v

d = 6.60 g/ 7.5 mL

d = 0.88 g/mL

The density of benzene is higher thus it is denser than ethanol.

Answer:

Benzene

Explanation:

You need to calculate the densities for each compound.

EtOH = 5.85/7.5 = 0.78 g/mL

Benzene = 6.60/7.5 = 0.88 g/mL

0.88 > 0.78, thus benzene is denser than ethanol.

Which of the following has the most electrons?A) Sr^{2+}
B) Rb
C) Cl^{-}
D) Kr

Answers

Sr^(2+) = 36
Rb = 37
Cl^(-) = 18
Kr = 36

So the one with the most is (B) Rb

Classify each of the following statements as an experiment, a hypothesis, a scientific law, an observation, or a theory. For example, Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide (N2O) or nitrogen monoxide (NO). Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product. In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure. In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules. By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions

Answers

Answer:

Classify each of the following statements as an experiment, a hypothesis, a scientific law, an observation, or a theory.

(1) For example, Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide (N2O) or nitrogen monoxide (NO). Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product.

(2) In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure.

(3) In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules.

(4) By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions

The correct answers to the question are as follows

(1) An experiment

(2) A scientific law

(3) A hypothesis

(4) A theory

Explanation:

(1)  An experiment

A scientific experiment involves the development of procedures to verify an hypothesis

(2) A scientific law

A scientific law is a description or general rule to explain an observed phenomenon using a mathematical or verbal statement without attempting to provide an explanation

(3) A hypothesis

An hypothesis is an explanation of an observed phenomenon which can then be tested through the performance of experiments

(4) A theory

A theory in science is an explanation of naturally occurring phenomenon backed up by the results of experiments and observation

Final answer:

The given statements have been classified as experiment (1), observation (2), scientific law statement (3), hypothesis (4), and theory (5) respectively in the context of Chemistry.

Explanation:

1. Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide or nitrogen monoxide: This is an experiment.

2. Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product: This is an observation.

3. In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure: This is a statement of a scientific law.

4. In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules: This is a hypothesis.

5. By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions: This is a theory.

Learn more about Scientific Statements Classification here:

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