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Answer:

The electrons located between the two nuclei are bonding electrons. A hydrogen molecule forms from two hydrogen atoms, each with one electron in a 1 s orbital. The two hydrogen atoms are attracted to the same pair of electrons in the covalent bond. The bond is represented either as a pair of dots or as a solid line.

Answer:

The molecules tend to speed up and move faster throughout the substance once thermal energy increases. This is evident whenever we heat up water as its molecules tend to move faster throughout the water as thermal energy tends to increase

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Answer:

strength and vitality required for sustained physical or mental activity

Explanation:

Answer:

energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.

Answer:

There are 0.1 moles of solute in 250 mL of 0.4 M solution.

Answer:

Low-pressure systems are associated with clouds and precipitation that minimize temperature changes throughout the day, whereas high-pressure systems normally associate with dry weather and mostly clear skies with larger diurnal temperature changes due to greater radiation at night and greater sunshine during the day.

Explanation:

Answer:

17.86km/hr

Explanation:

Speed or velocity is calculated using the formula:

Speed (v) = distance (d) ÷ time (t)

According to the information given in this question;

Distance = 10km

Time = 33.6minutes = 33.6/60 = 0.56hours

Speed/velocity = 10/0.56

= 17.857

= 17.86km/hr

Answer:

0.297619048

Explanation:

distance= 10 km

time= 33.6 min

10/33.6

v= 0.297619048

or 0.29

Answer:

Selenium trisulfide

Answer:

All of the elements in a period have the same number of atomic orbitals.

Explanation:

Increasing the surface area, stirring or agitating the mixture, raising the solvent's temperature, and employing a solvent with a stronger polarity or one that is more similar to the solid's chemical makeup are all ways to speed up the dissolving process.

There are several methods that can increase the rate of dissolving a solid, including:

Increasing the surface area of the solid by crushing, grinding or pulverizing it into smaller pieces.

- Stirring or agitating the mixture, which helps to distribute the solvent and increase contact between the solvent and the solid.

- Increasing the temperature of the solvent, which increases the kinetic energy of the solvent molecules, making them more likely to collide with and dissolve the solid.

- Using a solvent that has a higher polarity or is more similar in composition to the solid, which can increase the attraction between the solvent and the solid and promote faster dissolving.

Therefore, the methods that would increase the rate of dissolving a solid are increasing surface area, stirring or agitating the mixture, increasing the temperature of the solvent, and using a solvent that has a higher polarity or is more similar in composition to the solid.

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1.47 J/g°C is the specific heat capacity of a 70 g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

q = mCpΔT

Solve for Cp —> Cp = q/mΔT

q = -6700 J (negative because it released heat)

m = 70 g

ΔT = Final temp - initial temp = 25 - 90 = -65°C

Cp = (-6700 J) ÷ (70 g)(-65°C)

= 1.47 J/g°C

Hence, 1.47 J/g°C is the specific heat capacity of a 70 g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C.

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Answer: Cs because its further to the right on the table, meaning its more reactive.

Explanation:

Answer:

Cs

Explanation:

This element is the farthest right, and lowest meaning that its reactivity is very high.

1. valence electrons and electronegativity

2. Both reactivity and electronegativity decrease down a group.

3. Electronegativity decreases down a group and reactivity increases down a group.

4. The number of valence electrons increases from left to right.

5. Cs

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Answer:

Position 1 because it is the highest from the ground.

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Answer:

i dont know

Explanation:

ask your science teacher

Answer:

12 square feet i jope.please be right

Answer:

575 g

Explanation:

1 kg of sodium hydroxide is 1000/40=25 mol.

So 25 mol of sodium will be needed.

25 mol of sodium is 575 g.

According to the stoichiometry of the given chemical equation, 575 g s of sodium would be needed to produce 1.00 kg of sodium hydroxide.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

46 g sodium gives 80 g sodium hydroxide, thus 1000 g sodium hydroxide requires 46×1000/80=575 g sodium.

Thus, 575 g s of sodium would be needed to produce 1.00 kg of sodium hydroxide.

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Answer:

2.5 mole O2 should react (2 * 2.5) = 5.0 mole H2 but there is 6.0 mole H2. H2 remain in excess. O2 is the limiting reactant. mole of H2O formed = 2 * 2.5 = 5.0 mole.

Moles of water are produced when 6.0 moles of hydrogen gas react with 2.5 moles of oxygen gas

Balanced equation: 2H2 + O2 → 2H2O

2.5 mole O2 should react (2 × 2.5) = 5.0 mole

H2 but there is 6.0 mole H2.

H2 remain in excess. O2 is the limiting reactant.

mole of H2O formed = 2 × 2.5 = 5.0 mole.

= 5.0 mole

If less than 6 moles of oxygen are available per mole of glucose, oxygen is the limiting reactant. The ratio is 6 mole oxygen per 1 mole glucose, OR 1 mole oxygen per 1/6 mole glucose.

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Answer:

C) It moves faster and collects more data

Explanation:

Answer:

HH and hh

Explanation:

they are the same

Answer:

HCI

Explanation:

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Answer:

B. It's a physical change because the water and the salt kept their original properties.

Explanation:

Even though it tastes like salty water, the salt is still present, just in smaller molecules. It can be brought back so it is a physical change.

Answer:

Ca(OH)2 molecular weight. Molar mass of Ca(OH)2 = 74.09268 g/mol. This compound is also known as Calcium Hydroxide. Convert grams Ca(OH)2 to moles or moles Ca(OH)2 to grams. Molecular weight calculation: 40.078 + (15.9994 + 1.00794)*2 ››

Hey,

A) Let's first calculate the molar mass M of the molecule :

M(Ca(OH)₂) = M(Ca) + 2M(O) + 2M(H)

B) Let's deduct the corresponding mass m :

m = M x n

The mass of calcium hydroxide corresponding to this quantity of substance (in mol) is therefore 34 g.

Answer:

Reduction

Explanation:

Oxidation is a process that involves loss of electrons.

Reduction is a process that involves gain of electrons.

In this equation, the electrons (4e-) are in the reactant side. This means that it is gain of electrons.

The reaction is a reduction reaction.

Answer:

Radiometric dating, is called radioactive dating, is a technique used to determine the age of materials such as rocks. It is based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.

Explanation:

:)

Answer:

Chlorine is in group 7A, so it has 7 valence electrons

The Lewis structure for the molecule NCl²⁻ with -2 charge is attached in the image below.

Lewis structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .

They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.

They are capable of reflecting electronic structure of elements and even the pairing of electrons . In the diagram, each dot represents an electron while a pair of dots represent a bond between the atoms.It helps in understanding the  bonding between the two atoms.

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Answer:

I love it

Explanation:

☁️ Answer ☁️

annyeonghaseyo!

Your answer is:

When electrons are lost, a positively charged ion is formed. When electrons are gained, a negatively charged ion is formed. (I like the car)

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Have a nice day noona/hyung!~ ￣▽￣❤️

Answer: wheat

Explanation: a pigeon does not produce food nor a cheetah or mushroom because a mushroom breaks down subsistence.