PLEASE I NEED HELP!!
You find a ring with a mass of 89.2g. You fill a graduated cylinder up with 10mL of water
and put the ring into the cylinder. The water mark rises up to the 20mL mark. What is
the ring made of?
Solids
Table of Densities
Density g/cm
Solids
2.56
Copper
2.64
Gold
3.52
Platinum
Density g/cm
8.92
Marble
Quartz
19 32
Diamond
214
O Marble
Quartz
Copper
Gold

Ag^t + e^- ------> Ag

I = 2.48 A

t = 1430 s

q = It = 2.22×1180 = 3729.6

ne- = q/F = 3729.6/96485 = 0.03+

The mass percent is calculated by dividing the mass of the compound or solute by the mass of the element or solute. A percent is obtained by multiplying the result by 100. The mass percent formula is (mass of element in 1 mole of compound / mass of 1 mole of compound) x 100 to determine the amount of an element in a compound.

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When pol filled another test tube to the top, the liquid formed a low dome, which is evidence of cohesion.

The dome-like shape forms some properties of cohesion due to the water molecules, or termed as their tendency to stick up to one another is expressed by the property of cohesion of water.

Cohesion can be considered as an act, state, and the process of sticking alike molecules together consisting of alike molecules or otherwise entities. An example showing cohesion is of course water molecules. The tendency of several water molecules to compact together is referred to as cohesion property and is held together by a particular cohesive force described as an intermolecular hydrogen bond.

Water is attracted to water itself whereas, in adhesion, water is attracted to some other substances. Adhesion and cohesion are generally considered properties of water that can affect every water molecule present on the Earth and also the water molecule interaction with molecules of other substances as well.

Cohesion is also depicted as an ordinal type of measurement and is generally described as having “high cohesion” or “low cohesion” properties. Modules having high cohesion tend to be preferable, due to which high cohesion is associated with a variety of desirable traits included in software such as reliability, reusability as well as understandability.

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The required amount of the dihydrate in the question is 71g of the dihydrate.

We know that a compound could have a water of crystallization. This water of crystallization is attached to the molecule of the compound and is involved when we are calculating the molar mass of the compound.

Now we have the mass  of the anhydrous compound that is required as 65 g.

Molar mass of the anhydrous compound = 391 g/mol

Molar mass of the dihydrate 427 g/mol

Given that;

Number of moles of hydrated compound = Number of moles of anhydrous compound

x/427 = 65/391

x = 65/391 * 427

x = 71 g

Thus, we would require 71g of the dihydrate.

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The kcal required for one year is 730kcal (kilo calories).

A calorie is a unit of energy measurement. Typically, the energy content of meals and beverages is determined in terms of calories. You must consume fewer calories each day than your body uses up in order to lose weight. On the other hand, in order to gain weight, you must eat more calories than you burn.

The daily caloric needs of adult women range from 1,600 to 2,200. Estimates for men range from 2,000 to 3,200 per day. The low end of the range may be ideal for you if you move very little or not at all during the day. If you are very active throughout the day, the high end of the range can better match your needs. The number of calories we require decreases as we age.

The kcal required for one year is:

2000 X 365 days= 730000 calories.

so as 1Kcal= 1000 calories

73000cal= 730Kcal.

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John Dalton was born in a poor weaver's family in 1766 in England. He began his career as a teacher at the age of twelve. Seven years later he became a school principal. In 1793, Dalton left for Manchester to teach mathematics, physics and chemistry in a college. He spent most of his life there teaching and researching. In 1808, he presented his atomic theory which was a turning point in the study of matter.

According to Dalton's Atomic theory, all matter whether an element, a compound or a mixture is composed of small particles called atoms.

The postulates of this theory may be stated as follows:

Answer:

yes

Explanation:

I can't think

According to the research, the correct option is B. They increase the OH- concentration in solution is a property of all bases.

It is the substance that has alkalinity that, when in solution, increases the concentration of hydroxyl ions (OH-) and establishes combinations with acids for the development of salts.

They are soluble in water and usually have a bitter taste and by providing hydroxyl ions to the medium, they are capable of neutralizing acids.

Therefore, we can conclude that according to the research, the correct option is B. They increase the OH- concentration in solution is a property of all bases.

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Answer:The answer is potassium.

The equilibrium constant is the ratio of the reactants to the products which is 2.

The equilibrium constant shows the extent to which the reactants are converted into products. The equation of this reaction could be written from the number of molecules of the reactants.

Let the reactants be A and B and the product C, the reaction equation thus becomes;

The equilibrium constant is the ratio of the reactants to the products which is 2.

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Tetraborane(B₄H₁₀) has a mass of 2.21×10¯¹⁴ g and one billion (1×10⁹)  boron atoms.

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Answer:All have Chemical and Physical properties

Explanation:

Answer:

Explanation:

lithium (Li), chemical element of Group 1 (Ia) in the periodic table, the alkali metal group, lightest of the solid elements. The metal itself—which is soft, white, and lustrous—and several of its alloys and compounds are produced on an industrial scale.

Boiling point: 1,342 °C (2,448 °F)

Oxidation state: +1

Electron configuration: 2-1 or 1s22s1

Beryllium is an element with an atomic number of 4 in the periodic table. It is a bivalent and highly toxic element. The element has one of the highest melting points among the light metals. Beryllium exists in 30 different minerals, among which bertrandite, beryl, chrysoberyl, and phenacite are the most important.

The chemical element Calcium (Ca), atomic number 20, is the fifth element and the third most abundant metal in the earth's crust.

Atomic number: 20

Atomic mass: 40.08 g.mol -1

Standard potential: - 2.87 V

Electronic configuration: 4s2

Where Is Aluminum Found On The Periodic Table? Aluminum is the 13th element on the periodic table. It is located in period 3 and group 13.

Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third-most abundant gas in the Earth's atmosphere, at 0.934% (9340 ppmv).

Appearance: colorless gas exhibiting a lilac

Group: group 18 (noble gases)

Phase at STP: gas

Speed of sound: 323 m/s (gas, at 27 °C)

Answer:

D All living things grow and develop

Explanation:

the question is asking about photosynthesis and use of sugar for metabolic process like growth , use of energy for cell divison etc . this is basic for all living things.

Non‑destructive test could be used to determine which layer is which is:

a. add a little distilled water to see which layer the water adds to.

Aqueous layer will be dissolved in water, while the organic layer not.

Water is polar substance as the аqueous layer, while organic layer is nonpolar substance.

Water is a “universal" solvent.

The ability of water to function as a versatile solvent arise from the structure of water molecules.

Other test methods are destructive.

A supercritical extraction is used to separate substances using a supercritical fluid as a solvent. The pressure and temperature of the supercritical fluid are higher than the critical point.

A separatory funnel is used to separate liquids.

In IR spectroscopy, substances have the interaction with infrared radiation.

Missing options:

a. add a little distilled water to see which layer the water adds to

b. obtain a sample of the solution in the seperatory funnel and utilize IR

c. ask the instructor if you can perform a supercritical extraction of the sample

d. obtain a sample of solution in seperatory funnel and utilize NMR

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The amount of water that should be added to 28 ml of 15​% alcohol solution to reduce the concentration to ​14% is: 2 ml

To solve this problem, the formula and the procedure that we have to use is:

c1 * v1 = c2 * v2

Where:

Information about the problem:

Applying the dissolution of concentrations formula and clearing the volume of the diluted solution (v2) we get:

c1 * v1 = c2 * v2

v2 = (c1 * v1)/ c2

v2 = (15% * 28 ml)/ 14%

v2= 30 ml

In order to know how much water should be added we have to subtract 28 ml from the volume of the diluted solution:

amount of water should be added = v2 - v1

amount of water should be added = 30 ml - 28 ml

amount of water should be added = 2 ml

In chemistry a solution is known as a homogeneous mixture of two or more components called:

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Answer:

3. J.J. Thomson & electron

4. b) nucleus

5. neutrons & protons

6. electrons

The average density measured by each group, and the percentage error in each average is 0.88 % , 1.18 % , - 1.77% .

Group 1 :

= d (trial 1 +2+3) / 3

= 12.7 + 11.32 + 10.3 / 3

= 11.4 g/ml

% error = [(E.V - T.V) / T.V ] x 100

  = [( 11.4 - 11.3 ) /11.3 ] x 100

  = 0.88 %

Group 2 :

d = A.J + 11.4 + 11.4/3

   = 11.43 g/ml

% error = 11.433 - 11.3 / 11.3 x 100

    = 1.18 %

Group 3 :

d = 10.9 + 11.3 + 11.1 / 3

  = 11.10 g/ml

% error = 11.10 - 11.3 / 11.3 x 100

   = - 1.77%

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I understand the question you are looking for :

handbook lists the density of lead as 11.3 gmL, Several groups of students are attempting to determine the density of a lead weight by various methods. Calculate the average density measured by each group. and the percentage error in each average. Measured densities (g/mL) Group [ Group 2 Group 3 Trial 12.7 113 10.9 Trial 2 11.2 114 11.3 Trial 3 10.3 114 11.1 average density of group 1: glmL percent error of group average density of group 2: glmL percent error of group 2: average density of group 3: glmL percent error of group 3: Which group was most accurate? Which group was most precise? group group 2 group group 3 group 3 group

Magnesium potassium phosphate hexahydrate and a number of its deuterated counterparts were studied for their Fourier transform infrared and Raman spectra. By contrasting the spectra obtained at the boiling point of liquid nitrogen with those obtained at ambient temperature and by examining the spectra of a succession of partially deuterated MgKPO4

Raman and infrared spectroscopy both investigate how radiation interacts with molecular vibrations, but they do so in different ways depending on how the photon energy is delivered to the molecule by altering its vibrational state.

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The fossil fuel which normally contains contains high carbon sources. When it burnt it'll produce a lot of carbon dioxide increasing in its concentration in the atmosphere. But the ratio of 14C to 12C is decreasing because the age of those fossil fuel are so high that the carbon's content is ruined.

These are Extracted by Humans through the method of Drilling and Mining.

Thus from the above conclusion we can say that, ratio of 14C to 12C is decreasing because the age of these fossil fuel are so high that the carbon's content is ruined.

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Answer: The answer is 5.076 g of iodine solid.

Explanation:

Answer:

element

Explanation:

its the only substance type of antom called the element so yeah

Answer:

chemical compound

Explanation:

Carbon dioxide is a chemical compound that consists of two oxygen atoms and one carbon atom

Answer:

intruducing nuclear in a country like nepal where the knowledge of nuclear science is limited is a major task.

Explanation:

(maybe it will help if not sorry because my answer is wrong)

Nepal is a landlocked country that has been facing challenges in meeting its energy demand. The country is heavily dependent on imported fossil fuels, which are expensive and have negative environmental impacts.

Nuclear energy is the energy that is released from the nucleus of an atom through a process called nuclear reaction. Nuclear reactions can occur spontaneously or can be induced by bombarding the nucleus with particles such as neutrons.

However, Nepal currently does not have any nuclear power plants, and the country has not developed any nuclear energy infrastructure. Therefore, the development of nuclear energy in Nepal would require significant investment in terms of time, money, and human resources. Additionally, there are concerns about the safety and security of nuclear energy, and these issues would need to be addressed before nuclear energy could be developed in Nepal.

Despite these challenges, there are some potential benefits to the development of nuclear energy in Nepal. Nuclear energy has the potential to provide a reliable source of energy that is not dependent on imported fossil fuels. Additionally, nuclear energy is a low-carbon source of energy that could help Nepal reduce its greenhouse gas emissions and mitigate the impacts of climate change.

In conclusion, the development of nuclear energy in Nepal is a complex issue that requires careful consideration of the potential benefits and risks. While nuclear energy could provide a reliable and low-carbon source of energy, there are significant challenges that would need to be addressed before nuclear energy could be developed in Nepal.

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0

All atoms are made up of particles known as protons, neutrons, and electrons.

Mass Number

The mass number of an atom is most commonly given in amus. Amu stands for atomic mass unit. In an atom, a proton = 1 amu, a neutron = 1 amu, and an electron = 0 amu. Since atoms are so small, it is hard to measure a singular in normal units such as grams. So, instead, scientists use amus. Comparatively, protons and neutrons are far larger than electrons. This is why electrons are given a mass of 0 amu. Of course, electrons do technically have mass, but that mass is so small that it is negligible in many calculations.

Counting Neutrons

When given the atomic number and mass number, it is easy to find the number of neutrons. The atomic number of an element tells you how many protons there are. The mass number gives you the mass of the atom in amus; this number is equal to protons + neutrons. This means that mass number - atomic number = neutron number.

So, we can set up a very simple equation to find the number of neutrons.

Most hydrogen atoms have no neutrons.

Ammonia window cleaner materials contains a base

Window cleaner contains ammonia which is basic and used for removing dust and grease on the windows, and also for hard water stain on window.  ammonia is generally basic in nature according to the Arrhenius theory as well as Lewis acid base theory but it behave as acid only in the presence of strong acid that can extract a proton out of it. in window cleaner ammonium hydroxide is used as a window clear and because of hydroxide it is base because hydroxide is basic in nature and ammonia is alkaline in nature that's why  ammonia window cleaner materials contains a base.

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Answer:

Li2O

Explanation:

Lithium is an alkali metal that has three protons and three electrons. Oxygen is a nonmetallic gas that has eight protons and eight electrons. Lithium and oxygen bond to form an ionic compound.

3Li : 1s2 2s1......Li+

8O : 1s2 2s2 2p4.....O2-

Answer:43.12 KG = 43,120 grams

Explanation:1 kilogram is equal to 1,000 grams.

Answer:

43120 g

Explanation:

1 kg = 1000 g

43.12 = 1000(43.12) g

1000(43.12) = 43120

The unit is g because we are converting to grams, and the abbreviation for grams is g.

∴ 43.12 kg = 43120 g