HELPPPP.. NEED AN ANSWER SOON.. DBA IN 10 MIN FOR CHEMISTRY How do you preserve the accuracy and precision of your measurements when doing calculations with the measurements?

Use dimensional analysis to find the number of cm/min in 5.8 m/hr. Show your work. Be sure to calculate the answer in the correct number of significant figures.

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Answer 1

Answer:

Answer:

Explanation:

Q1. For assuring accuracy and precision we have to take into account statistical values such as absolut error, relative error and standard deviation. Errors(absolute and relative) are related to accuracy, and they tell you how much you are getting away from the correct answer. Standard deviation tells you how precisa your measure was, that means how many times you hit on the objective.

standard deviation can be added to the result as $X (+)/(-) 00,5$

Q2.

Answer 2

Answer:

Q1: sort your numbers into numerical order so you can determine the highest and lowest measured values. and then subtract the lowest measured value from the highest measured value. Now determine that the answer is the precision.

Q2: In one meter there are 100 centemeter. Now you got 5.8 miles per hour which will become 580 centemeter per hour. In addition, there are 60 minutes in an hour. Based on what we know, 580 centemeters per hour will and should become 580/60 cm/min

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Please select the word from the list that best fits the definition Occurs when all forces acting on an object cancel out, and there is no movement

Answers

It's balanced force. When two or more forces are exerted on an object, and their effects cancel one another out, and no movement occurs, it has a net force of 0. When an object has a net force of 0, it has balanced force.

Explanation:

When two or more forces act in opposite directions and are equal then the object does not move as the forces cancel out each other.

This type of force is known as balanced force. Balanced force does not cause change in motion.

Thus, we can conclude that balanced force occurs when all forces acting on an object cancel out, and there is no movement.

Where can you find hydrochloric acid in your body? What does it do?

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stomach
digest your food

Its found in your stomach and breaks down proteins

when an iron nail is placed in an aqueous solution of copper(ii)sulphate,a reaction take place.construct an ionic equation for reaction?

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The net ionic equation for this reaction is $Fe(s) \ + \ Cu^(2+)(aq) \ \rightarrow \ Fe^(2+)(aq) \ + \ Cu(s)$ . In ionic equations the soluble compounds are written in their dissociated ion forms. The ionic equation can be determined by knowing the general solubility rules. In this problem there are sulfate compounds involved. It is important to know that sulfates are generally soluble except for sulfates of Ba, Pb, Ag, and Sr. Therefore, the ones dealt with in this problem, CuSO4 and FeSO4, are both soluble in water.

Further Explanation:

The complete equation for this reaction is:

$Fe(s) \ + \ CuSO_(4)(aq) \rightarrow \ FeSO_(4)(aq) \ + \ Cu(s)$

CuSO4 and FeSO4 are soluble in water which will lead to the ionic equation:

$Fe(s) \ + \ Cu^(2+)(aq) \ + \ SO_(4)^ {2-}(aq) \ \rightarrow \ Fe^(2+)(aq) \ + \ SO_(4)^(2-)(aq) \ + \ Cu(s)$

Since the sulfate ion appears on both sides, it is a spectator ion. Spectator ions are unchanged in the chemical reaction and are removed from the net ionic equation:

$\boxed {Fe(s) \ + \ Cu^(2+)(aq) \ \rightarrow \ Fe^(2+)(aq) \ + \ Cu(s)}$

Based on the net ionic equation it can be seen that this is a reduction-oxidation reaction. Iron was oxidized and copper was reduced.

Learn More

Learn more about solubility rules brainly.com/question/11617954
Learn more about redox reactions brainly.com/question/2388654
Learn more about chemical equations brainly.com/question/6976143

Keywords: ionic equation, solubility

Which body systems work together to break down food into energy and rid the body of waste produced during this process? A. Skeletal and Endocrine
B. Nervous and Immune
C. Digestive and Excretory
D. Muscular and Skeletal

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Answer:

Explanation:

Help me with this please!!

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heterogeneous mixtures are those that are mixed, but not evenly. so you can see the different parts. compound is something made up of 2 or more elements. so, K will be a compound, as they are giving you the chemical formula, and showing there are 2 elements. and L is the heterogeneous mixture, as, even though it is crushed, the rocks can be picked apart.

How does the movement of particles in a stick of butter differ from the movement of particles in a dish of melted butter

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The molecules in a stick of butter are closer together. (It is in solid phase). When the butter melts, it is turning into a liquid, making its partacles more lose and spread apart. In liquids, the intermolecular forces are weaker, while in solids they are much stronger.

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