Which statement best describes the nuclear model of the atom. A) negative charges dispersed in a positively charged cloud B) positive charges dispersed in a negatively charged cloud C) small, dense positive nucleus surrounded by a diffuse negatively charged cloud D) small, dense negative nucleus surrounded by a diffuse positively charged cloud

Answer: (B) Buoyancy

Explanation: Buoyant force is an upward force that fluids exert on any object that is placed in them. The ability of fluids to exert this force is called buoyancy

Answer:

[tex]\boxed {\tt B. \ Buoyancy}[/tex]

Explanation:

Let's define each answer choice.

A. Density

B. Buoyancy

C. Magnetism

D. Solubility

The definition that matches "the ability for something to float on water" is buoyancy. Therefore, the correct answer is B. Buoyancy

Answer:

nucleosynthesis. A star's mass determines what other type of nucleosynthesis occurs in its core (or during explosive changes in its life cycle).

Answer:D- the actual solar system is too large

Explanation: just took the quiz

Answer: The actual solar system is to large.

Explanation: well it's not because its to small and definitely not because it's too simple. and because it moves slowly doesn't make sense. so its B. hope this helps :)

Answer:

This question appears incomplete

Explanation:

However, the chance of finding one isotope of an element is not the same for all elements because some elements/isotopes are more in abundance than some other elements/isotopes; for example the most abundant element on earth is nitrogen-14, hence the chances of finding nitrogen-14 in nature is higher the chances of finding any isotope of Xenon.

Also, while isotopes occur naturally, some do not. Hence, the chances of finding a naturally occurring isotopes (no matter how rare like Xenon-126) is higher than the chances of finding artificial radioisotopes like technetium-95 and promethium-146 (whose chances are zero because they cannot be found naturally occurring).

Answer:

Explanation:1. A 2.650-g sample of a gas occupies a volume of 428 mL at 0.9767 atm and 297.3 K. What is its molar mass?

2.

a. A sample of nitrogen gas has a volume of 10.0 L at 2.50atm and 50.0℃. If the pressure is increased to 5.00 atm and the temperature decreases to 25.0℃, what volume does the gas occupy?

(a). 5.00L, (b).4.61L, (c).2.50L, (d).5.42L

b. Using the average bond energy, calculate the enthalpy of the above reaction. draw Lewis structures of the reactants and products first to determine the exact bond order. N2(g)+3H2(g)→2NH3(g)

Answer:

B I already know this

Explanation:

Answer:

Students heat up a metal sample by placing it into a test tube suspended in boiling water. Since the water is boiling, the metal evnetually reaches the same temperature as the boiling water: 100oC. ... Putting the metal sample directly into the water – obviously – gets it wet.

The metal is heated in a dry test tube in order to measure the capacity of the metal.

When performing a chemical experiment, it is important to

Instead of putting the metal straight into the boiling water, it is necessary to measure the capacity by heating it in a dry test tube first.

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Answer:

32000 pounds

14741.752 kilograms

14741752 grams

16.25 tons

Answer:

7.86 moles of sodium chloride are produced.      

Explanation:

Given data:

Moles of chlorine = 3.93 mol

Amount of sodium = excess

Moles of sodium chloride formed = ?

Solution:

Chemical equation:

2Na + Cl₂     →     2NaCl

Now we will compare the moles of sodium chloride with chlorine.

                       Cl₂           :          NaCl

                          1            :            2

                        3.93        :           2×3.93 = 7.86

Chlorine is limiting reactant that's why we compare the NaCl with only number of mole of chlorine.

Thus, 7.86 moles of sodium chloride are produced.      

Answer:

C. a nail made from the metal iron

Explanation:

I did the test.

The product made from non-renewable resources is nail made from the metal iron.

Non renewable resources are materials that do not replenish themselves but they are easily exhausted or diminished after a period of time.

Therefore, The product made from non-renewanleable resources is nail made from the metal iron.

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Answer:

Explanation:

a ) silver chloride AgCl and lead chloride PbCl₂  Hg₂Cl₂ ,  are not dissolved in ware

so Ag⁺ and Pb⁺² Hg₂ ⁺² will precipitate out .

b ) BaSO₄ , SrSO₄  are insoluble

Ba⁺² and Sr⁺² will precipitate out .

c )

Al₂( CO₃)₃ ,  Fe₂(CO₃)₃  , CuCO₃ insoluble .

Al⁺³ and Fe⁺³ and Cu⁺² will be insoluble .

d )  

2Fe⁺³(aq) + 3CO₃⁻²(aq) = Fe₂(CO₃)₃ (s)

Answer:d

Explanation:took the test

The arrow in the statement  is likely pointing to the atomic symbol of manganese, which is the letter "Mn."  Therefore, option (D) is correct.

In the periodic table, elements are organized based on their atomic number, which corresponds to the number of protons in the nucleus of an atom. Manganese has an atomic number of 25, indicating that it has 25 protons. The atomic symbol is a shorthand representation of the element's name, allowing for easy identification and reference.

Therefore, the arrow is pointing to the atomic symbol of manganese, "Mn," indicating its position in the periodic table and distinguishing it from other elements. The atomic symbol is a fundamental component of the periodic table, enabling scientists to communicate and study elements and their properties more efficiently.

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The size or strength of something like a force is acceleration. Thus, option b is correct.

In general language we can say that push or pull is called force.

According,to newton second law of motion force is rate change of momentum it means

F= d/dt×(mxv)

Where m is mass and v is velocity

But in general case mass is constant.

So ,Force

F= mxd/dt×(v)

Since we know that rate change of velocity is acceleration.

Then we can say that

F= mass x acceleration

S.I unit of force is Newton

1 Newton = 1kg×m/sec^2.

Force and acceleration is a physical quantity which have both i.e magnitude and direct it means both are vector quantity. According,to newton second law of motion force is rate change of momentum it means

F= d/dt×(mxv)

Therefore, the size or strength of something like a force is acceleration. Thus, option b is correct.

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Answer:

Round to six significant = 1000.92

Explanation:

Given data:

Given value = 9.9100881×101

Round given value to six significant figures

Solution:

Significant figures:

All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.

Zero between the non zero digits are consider significant like 104 consist of three significant figures.

The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.

How to round the digits:

First we will look at the six digit of given values.

we will draw a line after six digit then we will look the digit after line.

It the digit after line which is 7th digit is 5 or more than 5 then one will be added to the six digit.

If it it is less than five then six digit remain same.

After this we will add zeros to the right till decimal point.

In given measurement:

9.9100881×101  = 1000.9188981

1000.9188981

Six digit is 1 and 7th is 8 thus 1 is converted into 2.

Round to six significant = 1000.92

Answer:

hydrogen builds many acids but not all

Answer:

its c

Explanation:

Answer:

The answer is.......... C!

Explanation:

Answer:

whether the molecule is formed from at least two atoms

Explanation:

A feature that distinguishes an elemental molecule and a compound molecule is whether the molecules are formed from at least two atoms.

An elemental molecule is a molecule that contains two or more of the same kind of elements.

A compound molecule contains two or more different kinds of molecules.

A molecule is a unit of a compound that can represent such a compound.

Therefore, what distinguishes an elemental molecule from a compound molecule is whether a molecule forms from at least two atoms.

Answer:

The seven SI base units, which are comprised of:

Length - meter (m)

Time - second (s)

Amount of substance - mole (mole)

Electric current - ampere (A)

Temperature - kelvin (K)

Luminous intensity - candela (cd)

Mass - kilogram (kg)

Explanation:

Answer:

The seven SI base units, which are comprised of:

* Length - meter (m)

* Time - second (s)

* Amount of substance - mole (mole)

* Electric current - ampere (A)

* Temperature - kelvin (K)

* Luminous intensity - candela (cd)

* Mass - kilogram (kg)

Explanation:

Hope this helps :)

Plz, give me brainliest if u can... if I'm right, idrc if u do or not, just askin.

Answer:

The atomic number stands for the number of protons in an atom of the element.

The number of protons determines the identity of the element,

So the atomic number identifies the element. GOOD LESSONS ♡

Answer:

Stay Healthy/ A

Explanation: k12

Answer: stay healthy

Explanation: got it in k12 have a g day

Answer:

48.9 g/mol

Explanation:

n=(atm x v)/(.08206 x 298)

The molar mass of the gas 49.0 g/mol.

Given:

Unknown gas with a density of 2.00 g/L at 1.00 atm and 25.0 °C.

To find:

The molar mass of an unknown gas.

Solution:

The mass of gas = m

The volume of the gas =V

The molar mass of the gas = M

The density of the gas = d = 2.00 g/L

[tex]d=\frac{m}{V}[/tex]

The pressure of the gas = P

The temperature of the gas T = 25.0 °C = 25.0+273.15 K=298.15 K

The ideal gas equation:

[tex]PV=nRT\\\\PV=\frac{\text{Mass of gas(m)}}{\text{Molar mass of gas(M)}}RT\\\\PM=\frac{m}{V}RT \\\\PM=dRT\\\\1 atm\times M=2.00 g/L\times 0.0821 atm L/molK\times 298.15 K\\\\M=\frac{2.00 g/L\times 0.0821 atm L/molK\times 298.15 K}{1 atm}\\\\M=48.96 g/mol \approx 49.0 g/mol[/tex]

The molar mass of the gas 49.0 g/mol.

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Answer:

144 g of phosphorus contain 4.65 moles.

Explanation:

Given data:

Mass of phosphorus (P) = 144 g

Number of moles = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of phosphorus is 31 g/mol

Now we will put the values in formula.

Number of moles = 144 g/ 31 g/mol

Number of moles = 4.65 mol

Thus, 144 g of phosphorus contain 4.65 moles.

Answer:

option (3) P is the correct answer.

Explanation:

electronegativity of As is 2.0

electronegativity of Li is 1.0

Electronegativity of P is 2.1

Electronegativity of Al is 1.5

electronegativity of Ge is 1.6

So P (phosphorus) would be expected to have highest electronegativity.

Electronegativity measures the Capability of an atom to pull the shared paired of electrons.

Electronegativity is determined by the following factors

nuclear charge.

the number and the location of different electrons inside the atomic shells.

The ionic compounds are named as The name of the first element is followed by that of the second element, the latter of which ends in -ide. Hence Option (B) is the correct.

What are Ionic Compound ?

In chemistry, an ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding.

The compound is neutral overall, but consists of positively charged ions called cations and negatively charged ions called anions.

For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.

For example, KCl, an ionic compound that contains K+ and Cl- ions, is named potassium chloride.

Therefore, The ionic compounds are named as The name of the first element is followed by that of the second element, the latter of which ends in -ide. Hence Option (B) is the correct.

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