How many millimeters (mm) are in 25 meters? Also, pick the choice that shows the correct math work.
O Q025 mm; because 25 m x
1 m
1.000 mm
= 0.025 mm
1.000 mm
O 25.000 mm; because 25 m x = 25,000 mm
1 m
25.000 mm; because 25 m X
100 mm
= 2500 mm
1 m
O 0.025 mm; because 25 m x
1 m
100 mm
= 0.25 mm

Answer:

Option D. KBr < KCl < NaCl

Explanation:

We'll begin by calculating the number of mole of each sample.

This can be obtained as follow:

For NaCl:

Mass = 1 g

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mole of NaCl =?

Mole = mass /Molar mass

Mole of NaCl = 1/58.5

Mole of NaCl = 0.0171 mole

For Kbr:

Mass = 1 g

Molar mass of KBr = 39 + 80 = 119 g/mol

Mole of KBr =?

Mole = mass /Molar mass

Mole of KBr = 1/119

Mole of KBr = 0.0084 mole

For KCl:

Mass = 1 g

Molar mass of KCl = 39 + 35.5 = 74.5 g/mol

Mole of KCl =?

Mole = mass /Molar mass

Mole of KCl = 1/74.5

Mole of KCl = 0.0134 mole

Summary

Sample >>>>>>>> Number of mole

NaCl >>>>>>>>>> 0.0171

KBr >>>>>>>>>>> 0.0084

KCl >>>>>>>>>>> 0.0134

Arranging the number of mole of the sampl in increasing order, we have:

KBr < KCl < NaCl

Answer: Does adding salt to water make the water boil faster that if salt is not added?

Explanation:

The scientific question for the boiling water experiment could be: "What is the effect of increasing temperature on the boiling point of water?"

This question aims to investigate how temperature influences the boiling point of water. By conducting the experiment and analyzing the results, scientists can gain a better understanding of the relationship between temperature and the physical state change of water from liquid to vapor.

The question focuses on a specific variable (temperature) and its impact on the boiling process, allowing for a targeted investigation and potential insights into the behavior of water under different conditions.

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Answer: When a substance is pure, it is composed of one type of molecule. For example, table salt is only composed of (more or less) salt molecules, while seawater has water and salt molecules. A more complicated example of a non - pure substance is soil. It has many different types of nutrients and compounds.

Answer:

Something that contains only one kind of matter. This can either be one single element or one single compound, but every sample of this substance that you examine must contain exactly the same thing with a fixed, definite set of properties.

Answer: d collect the data

Explanation:

Collecting the data and making observations comes right before the "analyzing the data" step of the scientific method. Therefore, option (D) is correct.

The scientific method can be described as an empirical method for acquiring knowledge that has developed in science since at least the 17th century.  

The scientific theory includes careful observation, applying what is observed, given that assumptions can distort how one interprets the observation. . A scientific hypothesis is possible to identify a possible outcome of an experiment that conflicts with predictions deduced from the hypothesis.

The scientific theory involves hypotheses, through induction, based on such observations, the testability of hypotheses, experimental and measurement-based statistical, and elimination of the hypotheses based on the experimental findings.

The process in the scientific method includes making hypothetical explanations, and predictions from the hypotheses as logical consequences and then conducting experiments or empirical observations based on those predictions.

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Answer:

D

Explanation:

Cell membrane, also called plasma membrane, thin membrane that surrounds every living cell, delimiting the cell from the environment around it.

Answer:

Hence, water is a compound because it can only be separated into hydrogen and oxygen atom by chemical reaction.A compound forms whenever two or more atoms form chemical bonds with each other. The chemical formula for water is H2O, which means each molecule of water consists of one oxygen atom chemically bonded to two hydrogen atoms. Thus, water is a compound.

Explanation:

Answer:

His snot.

Explanation:

Because a dependent variable is a variable (often denoted by y ) whose value depends on that of another, and a example is test scores, those are a dependent variable. And it's his snot because his snot keeps leaking and hes going to create an experiment to see if he can solve it.

The dependent variable of Justin's experiment is the mass of the snot the tissue can hold.

A variable can be described as an alphabet that can be used to represent an unknown number. Variable generally represents the value. A variable can be described as a quantity that can be changed according to the given mathematical problem.

The dependent variable can be defined as a variable that will depend on the value of some other number. The dependent variable is also defined as the output of a function. If the value of the dependent variable will change therefore there is a change in the value of the respective independent variable.

The independent variable of the experiment will not depend on the values of other variables and is known as the input of a function. The value of the independent variable will not affect by any values of a variable.

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Complete Question

What is the most dense a marble(2.56), quartz (2.64), or diamond (3.52).

Answer:

Diamond with a density of 3.52

Explanation:

When we say an object is dense, this means how heavy a substance or object can be.

Density can be defined as the mass per unit volume of an object of an object or a substance.

In the above question, we were given 3 substances or compounds with their respective densities:

marble(2.56)

quartz (2.64)

diamond (3.52).

We are asked to find the one that is most dense. This means we are to find the one with the highest density.

From amongst the three compounds, the most dense is Diamond with a density of 3.52.

Answer: (C) Scientists are questioning whether asteroids even hit the Earth and helped it form the water on it.

Explanation:

The scientists are collecting evidence for the fact that the earth's water is the product of the gas left due to the formation of the sun and the asteroidal material. The fact finding inquiry related to this matter has also arose many questions related to the development of the other planets on the solar system and their potential to sustain or support life.

Hence, based on the above information, option C. is correct.

Answer:

Precision is good but accuracy is poor

Explanation:

The precision in a measure is about how close is a measured value to each other. In the problem, all measurements are between 15.33 and 15.34cm. Thus, you can say precision is good

And accuracy is about how close are the measured values to the theoretical or real value. The real length of the pencil is 15.85cm. The measurements are not even close of the real value. For that reason, you can sat accuracy of the measurements is poor.

The precision was good while the accuracy was poor. Precision is defined

as how close measurements are with each other.

We were told the data from the measurement was between 15.33cm-

15.34cm which shows how close the measurements are hence having a

good precision.

The accuracy is defined as how close a measurement is to the theoretical

or actual value. In this case, the actual value is 15.85cm which is far from the

values gotten from measurements hence signifying the accuracy was poor.

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Answer:

hope it helps!!!!!!!!!!!!!!!!!!!!!

Explanation:

An ionic compound is made up of charged particles, called ions. It has a giant lattice structure with strong electrostatic forces of attraction.

Part ofCombined ScienceBonding, structure and the properties of matter.❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤

Answer:D

Explanation:

Move the decimal back 5 times.

Explanation:

According to Charles Law :

[tex] \frac{V_1}{T_1} = \frac{V_2}{T_2} [/tex]

[tex] \frac{V}{27} = \frac{1.5}{177} [/tex]

[tex]V = 0.22 \: atm[/tex]

Answer:

Gold, silver and sodium.

Explanation:

Gold, silver and sodium are the name of the elements which does not match to their abbreviation. It is because those names are comes from other language. For example, the symbol of sodium is Na which comes from Natrium that is a Latin word. The symbol of gold is Au which comes from Aurum that is also a Latin word. The symbol of silver is Ag which comes from a Latin word i. e. Argentum.

Answer:

One serving is 1/4 cup therefore 1 cup would be 4 servings. Since we have 9 cups we would then multiply 9 x 4 and the answer would be 36 servings. You have a ratio of cups to serving, so 1/4 cup : 1 serving, or .

Explanation:

Answer:

True

Explanation:

ion: an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells. When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.

Answer:

7.12 moles of sand you have in the bucket

Explanation:

Moles are defined as a determined amount of particles. To relate moles with particles it is used Avogadro's number (6.022x10²³ particles / mole).

That means in 1 mole of a determined particle you will have 6.022x10²³ particles.

As in the bucket there are 4.288x10²⁴ particles:

4.288x10²⁴ particles * (1mole / 6.022x10²³ particles) =

Answer:

suggested explanation

Explanation:

a hypothesis is like a guess to a question. then you test the guess.

The closest meaning of the word “hypothesis” is the suggested explanation. The correct option is C.

A hypothesis is a theory that is made by seeing a thing and explaining a description of that thing. A hypothesis must be testable according to the scientific method for it to be considered a scientific hypothesis.

Scientific hypotheses are typically based on prior observations that cannot be adequately explained by the current body of knowledge. To make a hypothesis, there is a proper observation.

The proposed explanation is a good example of a hypothesis. Because before making a hypothesis, there is a submitted explanation that will be used in proving the test.

Thus, the correct option is C. Suggested explanation regarding hypothesis.

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Answer:

Now eating can change food both physically and chemically. Once your spit touches the food chemicals in the saliva begin to change the food chemically.

Explanation:

Answer:  It made you not hungry anymore and filled you up. It also helped your brain be more focused.

Explanation:

A physical change is a change that doesn't create a new substance or change the substance. Usually this involves a size or shape change. ... A chemical change is a change that creates a new substance or changes the substance. Usually, this involves color change, temperature change, and/or a new substance being formed.

hope this help luv

Answer:

Each molecule of HCl is composed of a one-to-one ratio of hydrogen and chlorine.

Explanation:

At room temperature, HCl is a colorless, poisonous gas. Dissolve it in water, and, voilà, you have hydrochloric acid. For the record, acids are substances that release hydrogen ions in water. The more hydrogen ions an acid releases in water, the stronger the acid (see "What is an ion?" below). If you concluded from the above discussion that HCl releases many hydrogen ions in water, you are right!

The ratio of atoms in HCl is

The ratio of atoms in hydrogen chloride shortened as HCl is 1:1. This is because there is only one atom of hydrogen that is reacted with another atom of chlorine. A ratio indicates the relative sizes of two or more quantities.

When given another compound like H₂ SO₄, we can describe the elements as being in the ratio of 2:1:4. Thus, we can see the relative quantities of the individual elements in the given compound.

In conclusion, the ratio of atoms in HCl is 1:1.

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Answer:

greater than 115 N upwards

Explanation:

Answer:

0.72

Explanation:

if 760=1

550=x

=550÷760= 0.72 in two s.f

The atmospheric pressure of the mountain will be 0.723 atm  

Air is everywhere around us at due to which it touches all the surfaces due to which they possess some pressure this exerted pressure is known as atmospheric pressure which can be calculated with this formula.  

1 atm = 760 mmHg

1 mmHg = 0.00131 atmosphere

Substituting the value of 1 atm in the given equation,

1mmHg = 0.00131 atmosphere

550 mmHg = 0.00131

= 550 × 0.00131

= 0.723 A T M  

It is the total force exerted by the atmosphere as AIR has small molecules and every molecule is possessing some weight as when they are in bulk they form layers these layers.

As we go above on the earth the atmospheric pressure will drops due to the increase in the altitude of the earth due to which there will be less amount of oxygen.

Therefore, the pressure will be 0.723 atm.

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Answer:

D

Explanation:

D is the answer because this is the only one having to do with genetics. Fox's genetics changed because it's environment changed.

Answer:

Oxidation: The combustion of food and releasing energy in the presence of oxygen is called oxidation. Breathing: The process of taking oxygen and throwing carbon dioxide is called breathing. Respiration: The process of burning of food taken by organisms in the body to release energy is called respiration.####

Answer:

These are the answers:.

Explanation:

Respiration has many meanings.

Hope it helps.

Explanation:

Answer is above.. 1.750042* 10 race to 6

Answer:

A

Explanation:

Mitosis makes 2 daughter cells so you know the answer is not b

Answer:

Explanation:

1 kg of coal releases 3 million joules of energy

energy released = 3 x 10⁶ Joules

This energy will be in the form of chemical energy .

This energy is being used ti lift 1 kg of coal . Let height attained be h .

Gravitational potential energy of coal at height h = mgh where m is mass of the coal , g is gravitational acceleration .

chemical energy = gravitational energy

mgh = 3 x 10⁶

1 x 10 x h = 3 x 10⁶

h = 3 x 10⁵ m

= 300 x 10³ m

= 300 km .

so , 1 kg coal can be lifted by 300 km .

Answer:

A) it is converted to an SI unit of measurement

Explanation:

The SI, System International units are the fundamental units used to measure the scientific quantities.

Example of SI units are Kilogram (km) for distance, liter (l) for liquid, centimeter (cm), and meter (m) for size of the object or short distance etcetera.

SI units help to differentiate quantities from each other and without using SI unit, no one can identify the category of the quantity whether it is distance, size or volume.

Hence, the correct answer is "A) it is converted to an SI unit of measurement".

Answer:

677

Explanation: