What is the water of crystallization for a hydrate composed of 45.1% water? The anhydrous salt has a mass of 178 amu.

Answer & xplanation:

A. The electron arrangement for Si (atomic number 14) is: 1s² 2s² 2p⁶ 3s² 3p².

B. The electron arrangement for Ne (atomic number 10) is: 1s² 2s² 2p⁶.

C. B³+ is a cation, which means it has lost three electrons compared to neutral boron (B). Therefore, its electron arrangement is: 1s² 2s² 2p¹.

D. Cl¹⁻ is an anion, which means it has gained one electron compared to neutral chlorine (Cl). Therefore, its electron arrangement is: 1s² 2s² 2p⁶ 3s² 3p⁶.

The root mean square velocity of nitrogen molecules at 25°c is 515 m/s.

The square root of the mean square, or the arithmetic mean of the squares of a particular collection of numbers, is referred to as the root mean square (RMS or rms).

Root Mean Square, or RMS The d.c. current/voltage that dissipates the same quantity of power as the average power wasted by the alternating current/voltage is represented by the current/voltage of the alternating current/voltage.

One kind of mean is the root mean square. Since the squaring turns all of the numbers into non-negative numbers, it is helpful when attempting to determine the average "size" of numbers where the sign is irrelevant. Calculating a collection of integers' standard deviation using the root mean square is the most typical application.

Learn more about root-mean-square

https://brainly.com/question/29662026

#SPJ1

Answer: The 7 Characteristics of Living Things are

Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, and Nutrition

Explanation:

Movement: Change, Position, or place of an organism or part of an organism

Respiration: Break down food in cells and release energy

Sensitivity: Sense Respond, changes in the environment (Stimuli)

Growth: Increase the Size, Mass of an organism By increasing cell number and cell size

Reproduction: Produce offspring to prevent extinction of species

Excretion: Removal Tox Materials, waste products of metabolism, substance in Excess by chemical reactions in cells (respiration)

The cell organelles in the diagram are lysosome and nucleus.

This is referred to as a small structure in a cell that is surrounded by a membrane and has specific types of functions based on their respective properties.

The nucleus is a type of organelle which is involved in the control of the activities of the cells such as controlling of the genetical information of the cell and thus the heredity characteristics of an organism and control of the protein and enzyme synthesis. Another organelle is referred to as the lysosomes which functions as the digestive system of the cell, serving both to degrade material taken up from outside the cell and to digest obsolete components of the cell itself.

Read more about Organelle here https://brainly.com/question/16601148

#SPJ1

The completed table that fills the formula for the ionic compound has been given below:

To form an ionic compound from the given cation and anion we need to balance the charges of the cation and anions.

For example: Suppose we have a cation C3+ and an anion A-. Thus, to balance the charge we need 1C3+ and 3A-, the formula of the ionic compound formed CA3.

Ion K+ NH4+ Mg2+ Fe3+

Cl- KCl NH4Cl MgCl2 FeCl3

OH- KOH NH4OH Mg(OH)2 Fe(OH)3

CO32- K2CO3 (NH4)2CO3 MgCO3 Fe2CO3

PO43- K3PO4 (NH4)3PO4 Mg3(PO4)2 FePO4

Read more about ionic compounds here:

https://brainly.com/question/1332431

#SPJ1

Answer:

B

Explanation:

this equation shows an alpha decay

Answer:

c) MALDI coupled with time of flight (TOF) MS would be the best technique to analyze a polymer that is not very soluble in most solvents with mass spectroscopy and get an estimate of its molecular weight. This technique is particularly suited for the analysis of large molecules such as polymers and biopolymers. MALDI (matrix-assisted laser desorption/ionization) is a soft ionization technique that uses a laser to desorb and ionize molecules from a solid matrix. The resulting ions are then accelerated in a time-of-flight (TOF) mass analyzer, which separates them according to their mass-to-charge ratio (m/z). The mass spectrum obtained from this technique provides information on the molecular weight of the polymer.

Explanation:

Mass of Sample = 59.993 - 57.880 = 2.113 g

Mass of Sample after 1st Heating = 59.710 - 57.880 = 1.83 g

Mass of Water Removed = 2.113 - 1.83 = 0.283 g

Mass of Sample after 2nd Heating = 59.7 - 57.88 = 1.82 g

Mass of Water Removed = 1.83 - 1.82 = 0.01 g

Total Mass of Water lost = 0.293 g

Moles of Water lost = 0.293 / 18 = 0.01628

Mass of Anhydrate = 1.82 g

Now check the molar mass of each hydrate:

CuSO4.5H2O = 159.61 g/mol

ZnSO4.7H2O = 287.58 g/mol

BaCl2.2H2O = 244.26 g/mol

MgSO4.7H2O = 246.47 g/mol

Now, Check the mole ratio of Anhydrous Salt : Water to get the required stoichiometric coefficient of H2O.

For BaCl2.2H2O,

Answer: BaCl2.2H2O

What is anhydrous salt?

To know more about anhydrous salt, click the link given below:

https://brainly.com/question/13565867

#SPJ1

In 15.7 grams pf zinc oxide, there are roughly 1.144 x 1023 molecules. In order to treat or prevent skin irritation from things like wounds, burns, and diaper rash, zinc oxide is a medicinal cream, ointment, or paste.

Diaper rash is treated and prevented using topical zinc oxide lotion. As a result of diaper use, it is also utilized to shield skin from irritation and moisture.

* "Metal fume fever" can be brought on by exposure to zinc oxide. This flu-like condition causes symptoms like a metallic taste in people's mouths, headache, fever, chills, pains, tightness in the chest, and cough. After exposure, the symptoms may not appear for some hours, and they often manifest one or two days later.

To know more about zinc oxide visit:

https://brainly.com/question/30101572

#SPJ1

J.J Thomson performed some experiments to demonstrates the structure of atom. He discovered the small negatively charged particles later called the electrons. Hence, option d is correct.

There were various atomic models to describe the structure and electronic properties of atom. J.J. Thomson conducted the cathode ray experiment where, he he hit the cathode ray to and measured the electric charge with electrometer.  

From this, he concluded that the electric charge and the cathode rays was combined and are the same entity. The negatively charged particles in the atoms then called as electrons. Therefore, option d is correct.

Thomson demonstrated the plum- pudding model of atom, where the negatively charged electrons are randomly located inside the atom as the seeds in the plum-pudding. But later modern atomic models replaced this concept.

Find more on J. J. Thomson:

https://brainly.com/question/12839076

#SPJ9

The empirical formula of the white powder is CH1.5N1O2.

To find the empirical formula of the white powder, we need to determine the ratios of the elements present in the sample. We can assume that the sample contains 100 g of the powder, and then convert the masses of each element to moles using their molar masses:

mass of C = 21.9 mg = 0.0219 g = 0.0018 mol

mass of H = 2.5 mg = 0.0025 g = 0.0025 mol

mass of N = 2.3 mg = 0.0023 g = 0.0017 mol

mass of O = 5.3 mg = 0.0053 g = 0.0033 mol

Next, we can divide each of the mole values by the smallest mole value to get the simplest whole number ratio of the elements:

C: 0.0018 mol / 0.0017 mol = 1.06 ≈ 1

H: 0.0025 mol / 0.0017 mol = 1.47 ≈ 1.5

N: 0.0017 mol / 0.0017 mol = 1

O: 0.0033 mol / 0.0017 mol = 1.94 ≈ 2

Therefore, the empirical formula of the white powder is CH1.5N1O2.

To check if this is consistent with the molecular formula for cocaine (C17H21NO4), we can calculate the molecular formula mass of the empirical formula and compare it to the molecular formula mass of cocaine:

Empirical formula mass = 13.5 g/mol (approximately)

Molecular formula mass of cocaine = 303.4 g/mol

The empirical formula mass is much smaller than the molecular formula mass of cocaine, so the empirical formula is not consistent with the molecular formula.

Therefore, this suggests that cocaine is a larger molecule, made up of many repeating units of CH1.5N1O2. To determine the molecular formula of cocaine, we would need additional information, such as the molecular mass of the compound.

Learn more about empirical formula below.

https://brainly.com/question/1603500

#SPJ1

The theoretical yield of carbonic acid is 12 %.

What is carbon dioxide ?

One part carbon and two parts oxygen make up the gas called carbon dioxide. Its usage by plants to create carbohydrates during a process known as photosynthesis makes it one of the most significant gases on the planet.

What is reaction ?

The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds. The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds.

Therefore, The theoretical yield of carbonic acid is 12 %.

Learn more about carbon dioxide from the given link.

https://brainly.com/question/431949

#SPJ1

Answer:

A.Temperature

Explanation:

The density of the solid cylinder is calculated to be as  approximately 17.7 g/cm³.

The mass per unit of volume of a substance is known as density and symbol that is mostly used for density is ρ.

As the formula for the density of an object is:

density = mass / volume

volume = π x radius² x height

volume = π x (3cm)² x 10cm

volume = 282.74 cm³

mass = 5kg x 1000g/kg = 5000g

density = mass / volume

density = 5000g / 282.74 cm³

density ≈ 17.7 g/cm³

Therefore, the density of the solid cylinder is approximately 17.7 g/cm³.

To know more about density, refer

https://brainly.com/question/952755

#SPJ9

Answer:

One team pulls with more force than the other

Answer: D

Explanation: crest to crest to the crust to crust to the west to west.

Answer:

9 tablets.

Explanation:

2.21gg is 2210mg

2210/250= 8.84

The statement is incomplete, but I assume the missing word is "graphics card" or "GPU" and upgrading the usually speeds up the computer.

Why adding a Graphics card can improve sound or video quality?

Adding a dedicated graphics card can indeed improve the sound or video quality by offloading the processing of graphics-intensive tasks from the CPU to the GPU. This can result in smoother video playback, faster rendering of 3D graphics, and improved overall system performance.

It's also worth noting that upgrading other components, such as the RAM or CPU, can also improve system performance, not just the speed of the computer. Adding more RAM can help with multitasking and running memory-intensive applications, while upgrading the CPU can improve overall processing power and speed.

To learn more about graphics card, visit: https://brainly.com/question/2517504

#SPJ1

The ionization constant (Ka) for a 0.10 M solution of ethanoic acid with a pH of 2.88 is [tex]5.82 * 10^(^-^5^)[/tex]

The ratio of reactant to product amounts that is used to predict chemical behaviour is the definition of the equilibrium constant for a chemical process.

Ka = [H+][A-] / [HA]

where [H+] is the concentration of hydrogen ions, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

For ethanoic acid (also known as acetic acid), the ionization reaction is:

CH3COOH + H2O ⇌ CH3COO- + H3O+

pH = -log[H3O+]

The Ka expression can now be written as:

[tex]Ka = (x)^2 / (0.10 - x)[/tex]

At equilibrium, the value of x is very small compared to 0.10 M, so we can make the approximation that 0.10 - x ≈ 0.10.

Therefore, we can simplify the Ka expression to:

[tex]Ka = x^2 / 0.10[/tex]

To solve for x, we can use the equilibrium concentration of [H3O+] we calculated earlier:

[tex]x = [H3O+] = 7.68 * 10^(^-^3^) M[/tex]

Substituting this value into the simplified Ka expression, we get:

[tex]Ka = (7.68 * 10^(^-^3^))^2 / 0.10 = 5.82 * 10^(^-^5^)[/tex]

To know more about ionization constant visit:-

brainly.com/question/13794673

#SPJ1

Answer:

Explanation:

D. Ionizing radiation refers to any type of electromagnetic radiation or particle radiation that has enough energy to remove tightly bound electrons from atoms, resulting in the formation of ions. This includes radiation with wavelengths shorter than ultraviolet light, such as X-rays and gamma rays, as well as high-energy particles such as alpha particles, beta particles, and neutrons. Ionizing radiation can cause damage to cells and DNA, leading to health effects such as radiation sickness and an increased risk of cancer.

Group of linked genes acting as an allelic unit due to the suppression of crossing-over is called supergene.

Chromosomal region encompassing multiple neighboring genes that are inherited together because of close genetic linkage is called supergene.

The best examples of supergenes are the morphologically and genetically distinct sex chromosomes which has evolved independently in many groups of animals and plants. Sex chromosomes evolve from autosomes via mutation that causes its bearers to develop into a male or female.

Supergenes arise following the establishment of mutations at minimum of two sites, followed by sequential accumulation of additional mutations.

To know more about gene, refer

https://brainly.com/question/19947953

#SPJ9

Note: The question given on the portal is incomplete. Here is the complete question.

Question: What is the meaning of supergene?

Answer:

Explanation:

Rutherford's gold foil experiment revealed that most of the alpha particles went right through the gold foil but only a couple got deflected, demonstrating that the atom has mostly empty space with a small, hard, positively charged nucleus. Because of this, Rutherford proposed the nuclear model of the atom.

Answer:

Hope this helps

Explanation:

Rutherford took a thin gold foil and made alpha race particles to pass through it. He saw that most of the particle passed straight through the gold foil . But some deflected in small angles and 1 in 12000 particles deflected/rebounded back.

These observation made Rutherford conclude that-

- Most of the place inside an atom is empty because particles passed straight through.

- some particles deflected in small angles meaning the positive charge in an atom occupies very less space.

Answer:

The purpose of the lab is to study thermal energy transfer and its effects on different materials. The topic is important because understanding thermal energy transfer is essential to many fields, including engineering, physics, and chemistry. The question you are trying to answer may be something like "How does thermal energy transfer affect the temperature of different materials?"

Your hypothesis may be something like "Materials with high thermal conductivity will transfer heat more efficiently than materials with low thermal conductivity."

To test this hypothesis, you may use a setup where you have a heat source, a temperature sensor, and various materials with different thermal conductivities. You would measure the temperature changes of the materials as they are heated and cooled.

The key results of your lab may include the temperature changes of each material over time, the rate of heat transfer, and any observations about the behavior of the materials during the experiment. To summarize the data, you may create graphs or charts that show the temperature changes of the materials over time.

You may have quantitative data such as temperature readings and calculations of heat transfer rates, as well as qualitative data such as observations of the behavior of the materials during the experiment. You can organize this data in tables, graphs, and written descriptions.

The results may indicate that materials with higher thermal conductivity do transfer heat more efficiently, as your hypothesis predicted.

If you constructed graphs, you may observe trends such as a steeper slope for materials with higher thermal conductivity or a plateau in temperature once a material reaches its maximum heat capacity.

Possible problems with the experiment may include equipment malfunctions or inaccuracies in temperature readings. Surprising results may include unexpected temperature changes or behavior of certain materials.

The results may support your hypothesis and indicate that materials with high thermal conductivity transfer heat more efficiently.

The data supports your claim by showing clear temperature changes and rates of heat transfer for each material.

If you could repeat the experiment, you may try using different materials or adjusting the setup to control for potential confounding factors. For example, you may try using materials with similar heat capacities or reducing heat loss during the experiment.

Explanation:

Distance 11.143 ft or thereabouts is Distance roughly how far the tree extends from its tip to its base.

Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting and ending position.

We obtain a quadratic equation by simplifying and expanding the left side:

2y^2 - 288y + 144 = 0

The quadratic formula is used to solve for y, and the result is: y = [288 (2882 - 4(2)(144)]

/(2(2))

y = [288 ± √58368]

y = 0.857 ft or /4 y = 84 foot

The only viable answer is: y 0.857 ft since y cannot be higher than 12 ft (the whole height of the tree).

The result of changing this number for y in the equation x + y = 12 ft is: x + 0.857 ft = 12 ft x 11.143 ft

To know more about Distance  visit:

https://brainly.com/question/13034462

#SPJ1

Answer:

Explanation:

% yield = (actual yield / theoretical yield) x 100%

actual yield = 21.47 g

theoretical yield = 65.45 g

% yield = (21.47 g / 65.45 g) x 100%

% yield = 32.80%

Therefore, the student obtained a percent yield of 32.80%.

1) Tool used fοr spreadsheets and analysis are Micrοsoft Excel. Thus, option (b) is cοrrect.

2) Tool used tο create presentations are Microsoft PowerPoint. Thus, Option a) is cοrrect.

A spreadsheet is a type of cοmputer software that captures, displays, and manipulates data that is οrganized in rows and columns.

Users can style, organize, and cοmpute data in a spreadsheet using Microsoft Excel.

You can use PowerPoint on your Cοmputer, Laptop, or mobile device to: Create slideshows from inception οr from a template

Microsoft Word is a word editing sοftware that can create basic and complicated documents.

3) Tool used for authoring dοcuments are Microsoft Word. Thus, Option a) is cοrrect.

4) the best apprοach would be Research the problem and give a presentation on how yοu approached the problem, and provide the different books as examples on various slides of the presentation. Thus, Option a) is cοrrect.

5) The best wοuld be A spreadsheet with all your calls and the toughest ones highlighted using fill cοlor. Thus, Option c) is cοrrect.

Learn mοre about Microsoft Excel visit

brainly.com/question/24202382

#SPJ1

Answer:

Explanation:

1. 546.0ml x [tex]\frac{L}{1000mL}[/tex]= 0.5460L

2. 86.0kg x [tex]\frac{1000g}{1 kg}[/tex]= 8.60x[tex]10^{4[/tex] g

3. 2.56 pound x [tex]\frac{16 ounces}{1 pound}[/tex]= 40.1 ounces

4. 75.3 pound x [tex]\frac{453.6 g}{1 pound}[/tex] = 45200 g

5. 12.5 yard x [tex]\frac{91.44 cm}{1 yard}[/tex] = 1140 cm

Answer:

P4O10

Explanation:

Answer: The answer to this question is negative 40 degrees Fahrenheit

Explanation: