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Answer:covalent bonds

Explanation:

Answer:

false darling

Explanation:

Answer:

ΔH = -111.1kJ

Explanation:

ΔH of any reaction could be obtained from similar reaction doing algebraic operations. Using the reactions:

(1) CaO(s) + 2HCl(aq) → CaCl₂(aq) + H₂O(l) ΔH = -186 kJ

(2) CaO(s) + H₂O(l) → Ca(OH)₂(s) ΔH = -62.3 kJ

(3) Ca(OH)₂(s) → Ca(OH)₂(aq)  ΔH = - 12.6 kJ

(1) - (2):

Ca(OH)₂(s) + 2HCl(aq) → CaCl₂(aq) + 2H₂O(l)

ΔH = -186kJ - (-62.3kJ) = -123.7kJ

This reaction -(3):

Ca(OH)₂(aq) + 2HCl(aq) → CaCl₂(aq) + 2H₂O(l)  

ΔH = -123.7kJ - (-12.6kJ) = -111.1kJ

Answer:

molar mass= 180

Explanation:

molar mass = (6×12) + (12×1) + (6×16) = 180

Answer:

I`m pretty sure it`s electrical tape.

Explanation:

The objects which does not conduct electricity are called insulators which are not needed to test electrical conductivity. Hence, insulated wire is the correct option.

Conductivity of a substance is the ability to conduct electrically or thermally through the substance. Based on their conductivity, there are three classes of materials conductors, semiconductors and insulators.

Conductors are materials conducting heat and electricity at all temperatures. Semiconductors conduct only at higher temperature or on doping. Insulators are material does not conduct at any condition.

Metals are good conductors. Silicon , germanium etc. are semiconductors. Whereas, wood, plastic etc. are insulators they does not allow flow of electrons through it. Therefore, an insulated wire is not needed to test conductivity.

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Answer:

9302 moles of CO contain 5.60×10²⁷ molecules

Explanation:

We solve this with Avogadro's number.

NA = 6.02×10²³

This number states the how many particles are in 1 mol of anything.

1 mol of atoms contains 6.02×10²³ atoms

1 mol of molecules  contains 6.02×10²³ molecules.

We apply a rule of three:

6.02×10²³ molecules are contained in 1 mol of CO

Then, 5.60×10²⁷ molecules may be contained in (5.60×10²⁷ . 1) / 6.02×10²³

= 9302 moles

Answer:

290.32 g

Explanation:

First we calculate the volume of the cube:

Now we convert cubic centimeters to mililiters:

Finally we calculate the mass, using the equation for density:

Answer: Covalent

Explanation:

A covalent compound is formed when an element shares its valence electron with another element. This compound is formed between two non metals. Example: [tex]HF[/tex]

An ionic compound is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and the element which accepts the electrons is known as electronegative element or non metal. Example: [tex]NaCl[/tex]

Answer:

La distancia recorrida por el móvil es 228.600 m

Explanation:

El movimiento rectilíneo uniforme MRU es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante. Es decir:, en este caso el movimiento es lineal en una única dirección  y la velocidad de desplazamiento es constante.

La velocidad es una magnitud física que expresa la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello mediante la expresión:

[tex]velocidad=\frac{distancia}{tiempo}[/tex]

En este caso:

Reemplazando:

[tex]25 \frac{m}{s} =\frac{distancia}{9144 s}[/tex]

y resolviendo obtienes:

distancia= 25[tex]\frac{m}{s}[/tex] *9144 s

distancia= 228.600 m

La distancia recorrida por el móvil es 228.600 m

A movement is rectilinear uniform when an "object" (for example) travels in a straight path at a constant speed, given that its acceleration is zero.

Velocity (v) = 25m/s

Distance (d) = ?

Time (t) = 2.54hr = 9,144 s

Looking at the data, we see that the time is in hr, but we need it in seconds. Therefore we do a conversion from hours to minutes, taking into account that 1 hour is equal to 3600 seconds.

To calculate the distance traveled by the mobile, the speed is multiplied by the time taken.

For this the following formula is applied:

We apply the data in the formula; to solve for the distance.

Answer: The distance traveled by the mobile is 228,600 meters.

Answer:

Explanation:

Molar mass of N2 = 28.01

3.66 moles x 28.01 grams/mole = 102.5166

Answer:

Explanation:

u wanted to talk

Answer:

See explanation

Explanation:

Ammonia is a covalent molecule. We should remember that a covalent molecule is formed by the sharing of electrons.

Now hydrogen has only one valence electron while nitrogen has five valence electrons. Two among these five valence electrons is a lone pair of electrons.

Three hydrogen atoms can share one electron each with all of the available valence electrons in nitrogen to form NH3 with the lone pair of electrons still localized on the nitrogen atom.

Answer:

You need to know the weight in lb of 1 apple (or how manly apples there are in a 1 lb bag of apples)

Explanation:

Option a) presents the price for unit of apple: 10 apples for $10.50. So, the price of 1 apple is calculated as $10.50/10 = $1.05

Option b) presents the price for weight of a bag of apples: 3 lb bag of apples for $5.00. So, the price for 1 lb bag of apples is $5.00/3 = $1.66/lb. But we don't know how many apples there are in a 1 lb bag.

If we knew the approximate weight in lb of an apple, we would know how many apples there are in a 1 lb bag and then we can compare with the price for unit (option b vs option a). For example, if there is 1 apple in a 1 lb bag, option b) is more expensive than option a) ⇒ $1.66/apple > $1.05/apple

2Na+2H2O----2NaOH+H2

in a lift if an object is moving with acceleration same as acc. due to gravity then apparent weight is 0. so it seems object is weightless.

or else I dunno maybe in space

technically you will be weightless when no force acts on you

Answer:

525.1 g of BaSO₄ are produced.

Explanation:

The reaction of precipitation is:

Na₂SO₄ (aq) + BaCl₂ (aq) →  BaSO₄ (s) ↓  +  2NaCl (aq)

Ratio is 1:1. So 1 mol of sodium sulfate can make precipitate 1 mol of barium sulfate.

The excersise determines that the excess is the  BaCl₂.

After the reaction goes complete and, at 100 % yield reaction, 2.25 moles of BaSO₄ are produced.

We convert the moles to mass: 2.25 mol . 233.38 g/mol = 525.1 g

The precipitation's equilibrium is:

SO₄⁻² (aq)  +  Ba²⁺ (aq)  ⇄  BaSO₄ (s) ↓       Kps

525.1 0 g of BaSO₄ are produced.  

The reaction of precipitation is:

Na₂SO₄ (aq) + BaCl₂ (aq) →  BaSO₄ (s) ↓  +  2NaCl (aq)

Ratio is 1:1. So 1 mol of sodium sulfate can make precipitate of 1 mol of barium sulfate.

Molar mass of [tex]BaSO_4[/tex] is 233.38 g/mol

The formula for the number of moles is as follows:-

[tex]Number\ of\ moles=\frac{Mass}{Molar\ Mass}[/tex]

[tex]Mass=2.25\ moles\times233.38\ g/mol\\=525.10\ g[/tex]

So, 525.10 g of barium sulfate be precipitated.

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Answer:

B. Matter is composed of very small particles.

Explanation:

All matter is composed of extremely small particles called atoms. All atoms of a given element are identical in size, mass,

The statement is true based on the kinetic theory is that; "matter is composed of very small particles.".

The kinetic theory of matter holds that the particles that compose matter are in constant random motion. In this theory, all matter is composed of molecules.

Now, the statement is true based on the kinetic theory is that; "matter is composed of very small particles.".

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Answer:

When a solid dissolves the solid and the liquid they form a mixture called a solution.

Answer:

45/9 or 5

Explanation:

the oil which relative amount is greater than demand is fuel oil, whose fraction is 45/9

Answer: 1) Na because it requires least amount of energy.

Na requires the least amount of energy to remove the most loosely held electron.

Na - [Ne] 3s¹

P - [Ne] 3s² 3p³

Ar - [Ne] 3s² 3p⁶

Cl - [Ne] 3s² 3p⁵

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Answer:

The atmosphere and Earth's interior are layered by density. Gravity pulls more strongly on denser materials so denser materials are at the center of things. Earth's core, at its center, is denser than its crust. The lowest layer of the atmosphere is denser than the upper layer.

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Answer:

Gravity pulls more strongly on denser materials so denser materials are at the center of things.

Explanation:

Earths core at its center is denser than its crust the lowest layer of the atmosphere is denser than the upper layer

Answer:

It would be True

Explanation:

Because they both have the same push of gravity. Gravity affects all objects equally. If you drop an egg and a watermelon at the same time they would both collide with the floor at the same time.

Answer:

1.Newton's first law is often called the law of inertia.

2.Newton's second law of motion is F = ma

3.An object not wanting to change its speed or direction

4.a bike would have more acceleration

5.it doesn't have auto brakes and its lighter than a motorcycle

6. Second law

7. First law

8. First law

9. Second law

10.  First law

Those should be right!

Answer:

An inherited trait is one that is genetically determined. Inherited traits are passed from parent to offspring according to the rules of Mendelian genetics.

Explanation:

Answer:

Light is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes. The visible spectrum showing the wavelengths of each of the component colours.

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