Danielle is asked to determine the density and the identity of a metal. She determines the mass of the metal to be 102.06g and then determines the volume of the sample using water displacement. Find the density. Round the answer to the nearest whole number?

Answer:

ACB

Explanation:

Thermal energy is the average sum of all kinetic energy of all the molecules of gases. The correct order of mug in decreasing thermal energy is C>A>B.

Thermal energy is a energy which is possess by a moving object. It is directly proportional to kinetic energy of the molecules. It is very difficult to find the correct value of kinetic energy so we find average kinetic energy. Which is very easy to calculate as compared to calculating kinetic energy. Average kinetic energy is directly proportional to temperature. It is not dependent on the type of gases or mass of gases.

Mathematically,

K.E=2/3KT

Where,

K= Boltzmann constant

T is the temperature

Between A and C whose volume is same, 120°F is the highest temperature so, C will have high thermal energy than A. C will have lowest thermal energy as it has volume larger than that of A and C.

Therefore, the correct order of mug in decreasing thermal energy is C>A>B.

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Answer:

True

Explanation:

A chemical reaction will always result in a new product or substance being formed

that is what makes it a chemical reaction.

Answer:

Empirical formula is Cr₂O₃.

Explanation:

Given data:

Percentage of Cr = 68.4%

Percentage of O = 31.6%

Empirical formula = ?

Solution:

Number of gram atoms of Cr = 68.4 / 52 = 1.3 2

Number of gram atoms of O = 31.6 / 16 = 1.98

Atomic ratio:

                            Cr               :         O

                           1.32/1.32     :       1.98/1.32

                               1              :        1.5

Cr : O = 1 :  1.5

Cr : O = 2(1 : 1.5)

Empirical formula is Cr₂O₃.

Answer:

True

Explanation:

Earth is a single interconnected system but it can be subdivided into smaller systems.

Answer:

Speed: The rate at which someone or something is able to move or operate. Motion: The action or process of moving or being moved.

Explanation:

I pretty much explained it in the answer, have a good one!

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Answer:

Holmium

Explanation:

Electronic configuration:

             [Xe] 6s² 4f⁵ 5d⁶

To know this element, we must first find the atomic number and then look for its position on the periodic table.

     Number of electrons in [Xe] = 54;

  So the total number of electrons  = 54 + 2 + 5 + 6 = 67

This element has an atomic number of 57. On the periodic table, it is Holmium

Answer:Soluble

Explanation:Soluble:(of a substance) able to be dissolved, especially in water.

Answer:

iodine

Explanation:

In the presence of starch, iodine turns a blue/black colour. It is possible to distinguish starch from glucose (and other carbohydrates) using this iodine solution test. For example, if iodine is added to a peeled potato then it will turn black. Benedict's reagent can be used to test for glucose.

Answer:higher than and higher than

Explanation:

Answer:

So 1st it is B then D then E then a then C

The order of density of substances ranging from most dense to least dense is :substance B>substance A>substance E>substance C>substance D.

It is a ratio of substance's mass per unit of volume.Symbol most commonly used for density is р.The SI unit of density is kilogram per cubic meter .It explains how tightly a material is packed together.

There are 2 types of density :1)absolute density 2) relative density.Absolute density is the mass of any  substance per unit volume and relative density is the ratio of density of a substance to the density of a given reference material.

Reference material used for relative density is water.The instrument used for measuring density or relative density of liquids is hydrometer. Density is measured at constant temperature and pressure.

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I'll be honest I'm guessing,

but maybe D

Answer:

B, 4.

Explanation:

i just took this

Answer:

Meth- its full name is Methane

Explanation:

1 methane

2 ethane

3 propane

4 butane

5 pentane

6 hexane

7 heptane

8 octane

9 nonane

10 decane

11 undecane

12 dodecane

Answer:it do not states

Explanation:

Answer:

D.) small, dense negative nucleus surrounded by a diffuse positively charged cloud

Explanation:

I am not 100% sure but the reason I think this is the answer is because Protons and Neutrons are in the nucleus. Protons being positively charged and neutrons being negatively charged. Again, I do not know for sure, but I think D is the answer.

The statement that best describes the nuclear model of the atom is C) small, dense positive nucleus surrounded by a diffuse negatively charged cloud.

The atom is made up of 3 kinds of particles: protons, neutrons and electrons.

Protons (positive charge) and neutrons (zero charge) are in the nucleus, which concentrates 99% of the mass of the atom in 1% of the space. This is why is it positive and very dense.

Electrons (negative charges) are orbiting the nucleus in diffuse negatively charged clouds known as orbitals.

The statement that best describes the nuclear model of the atom is C) small, dense positive nucleus surrounded by a diffuse negatively charged cloud.

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An example of the buoyant force on a piece of bread is the piece of bread floats on the surface of body water such as a lake.

This is a force experienced by objects when they are in a body of water. This force implies objects have an upward force, which in many cases causes them to float.

Any object that is submerged in water but floats or shows to have an upward force is an example of this force. Based on this, the option that clearly shows the buoyant force is a bread floating on a lake.

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Answer:

A

Explanation:

Answer:

2.920

Explanation:

This question tests your knowledge of approximation. If we look at the place values after the decimal point, we have, .915. This corresponds to hundredth, tenth and unit.

Since we have 9.15, in rounding it to the nearest tenth, we have to round it up to .920.

Hence, the weight of the flour to the nearest tenth is 2.920.

Answer:

They are organized by atomic number, hence the reason for 1,2,3,4, you get where im goin'?

Explanation:

Answer:

There's a lot...lying...rolling eyes...aggression...mating...parenting...sadness...basically alot

Explanation:

Answer:

To do this question. we first have to find the mass% of nitrogen in N2O and then, using that percentage, we can simply find the number of moles of N from the number of moles of N2O

Mass % of Nitrogen:

Mass% of nitrogen = (Molar mass of N2 / Molar mass of N2O)*100

Mass% nitrogen = (28 / 44)*100

Mass% of Nitrogen = 0.63 * 100

Mass% nitrogen = 63%

Mass of Nitrogen:

So, now we can say that in any given mass of N2O. 63% of the total mass is the mass of Nitrogen

Hence, total mass * 63/100 = Mass of Nitrogen

Replacing the variables

40 * 0.63 = Mass of Nitrogen

Mass of Nitrogen = 25.2 grams

the state of y at room temperature is gas, good luck!

Answer:

i believe its friction

Explanation:

friction slows down objects

Answer: The correct answer is B.

Explanation: The scientists and all test subjects involved in the investigation work for the company that sells the medication and  science product or similar is only considered as reliable if it has been tested following the scientific method and if there are not interests that can affect the process.

Answer:

7.040 x 10^-4 mol

Explanation:

Answer:

Mineral Content.

Explanation:

shape has nothing to do with the color displayed.

Nor does the grain size.

I don't know what banding is. Whatever it is, it is not the answer.

D: mineral content.

Answer:

this is the answer for will NaOH be a buffer

Explanation:

The compound CH 3NH 3Cl is a salt made from that weak base, so the combination of these two solutes would make a buffer solution. NH 3 is a weak base, but NaOH is a strong base. The combination of these two solutes would not make a buffer solution

Answer:

A. how cholesterol works in the body.

Explanation:

If we know the precise structure of a molecule (by X-ray crystallography), we can understand more about how it interacts with cells, proteins, and other molecules. It can also tell us what reactions it might take part in.

Therefore, we can learn more about how it works in the body and what activities it takes part in in the cells of the body.

Answer:

A

Explanation:

nuityyy

Answer:

A. Occur in gaseous and liquid state

Explanation:

The choice that is not a characteristic of minerals is that minerals occur in gaseous and liquid state.

All minerals are solid inorganic compounds.

Answer:

More and Faster

Particles in a warmer block will have more kinetic energy and move faster than the particles in the colder block.

Kinetic energy is defined as a form of energy that an object or particle has by the reason of its movement.

It is also defined as the measure of the work that an object does by the virtue of its motion.

Kinetic energy can be expressed as

KE = 1/2mv²

Kinetic energy is produced when potential energy is released, triggered into motion by gravity, or chemical reaction among other crystals.

Thus, particles in a warmer block will have more kinetic energy and move faster than the particles in the colder block.

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