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Look at the following enthalpy diagram. Select all that apply.

A large activation energy is required for this reaction to take place.
The products have more energy than the reactants.
The products are more stable than the reactants.
This is an addition reaction.
This is a substitution reaction.

Answer:

D

Explanation:

Answer:

volume

Explanation:

Answer:

what u need help with bro

Answer:

8 protons, 10 neutrons, 8 electrons

Explanation:

Answer:

C. Diffusion

it is called diffusion

Explanation:

The green color of the Statue of Liberty was due to the outer surface covered with hundreds of thin copper sheets. Copper reacts with the air to form a patina or verdigis

The balanced equation :

CaCO₃ (s) + 2HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)

Equalization of chemical reaction equations can be done using variables. Steps in equalizing the reaction equation:

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product

3. Select the coefficient of the substance with the most complex chemical formula equal to 1

CaCO₃ (s) + HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)

Give coefficient :

CaCO₃ (s) + aHCl (aq) → bCaCl₂ (aq) + cH₂O (l) + dCO₂ (g)

Ca, left=1, right=b⇒b=1

C, left=1, right=d⇒d=1

O, left=3, right=c+2d⇒3=c+2d⇒3=c+2.1⇒c=1

H, left=a, right=2c⇒a=2c⇒a=2.1⇒a=2

the equation becomes :

CaCO₃ (s) + 2HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)

When any chemical equation is not balanced then that is known as skeletal chemical equation. We need to balance it because as we know that mass can neither be created nor be distroyed and also the number of atoms on the reactant side should always be equal to the compounds on the product side .

Answer:Zinc grams to moles

Molar mass of Zinc(Zn) = 65.38 g/mol. This means 1 mol of Zn is 65.38g . To find the number of moles of Zn, we divide the given amount of Zn by the molar mass of Zn. Hence, 1.34 g of Zn contains 0.020 moles of Zinc

Explanation:

1 mole is equal to 6.023 × 10 ²³ molecules. The mass of 1.46 mole of zinc is 1.34 grams.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

The mole concept can be used to convert between mass and number of particles.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

Molar mass of Zinc(Zn) = 65.38 g/mol.

This means 1 mol of Zn = 65.38g .

To calculate the number of moles of Zn, we divide the given amount of Zn by the molar mass of Zn.

Hence, 1.34 g of Zn contains 0.020 moles of Zinc.

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Answer:

water, H20

Explanation:

From the given choices, only water has two unshared or lone pairs of electrons in its central atom.

The formula of water is:

              H₂O

H is hydrogen with 1 electron

O is oxygen with 8 electrons and 6 valence electrons

To form the covalent bond, the 6 valence electrons are involved. Two out of the 6 bonds with the two oxygen.

The remaining 4 gives the two lone pairs.

Answer:

D

Explanation:

My logic: Electricity produces heat, chemical reactions produce heat. And so on.

Answer: A:Radition

Explanation:

Answer:

Awe ...

Explanation:

Answer:

the farther they are the longer there cycle is. closer they are shorter time.

Answer:

true

Explanation:

CO has two C-O bonds. The dipoles point in opposite directions, so they cancel each other out. Thus, although CO₂ has polar bonds, it is a nonpolar molecule. Therefore, the only intermolecular forces are London dispersion forces.

Answer:

Explanation:

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According to Answers,

There is one covalent bond in a chlorine molecule. The formula for a chlorine molecule is Cl2, which means that there are two chlorine atoms bonded together per molecule. The structural formula for a molecule of chlorine is Cl-Cl, in which the line in between the symbols for the two atoms represents a single covalent bond.

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Hope this helps! <3

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Answer: mitosis results in two. meiosis results in four.

Explanation:

Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells

The least reactive metal is lead, since it reacted with none of the salt solutions.

The statement that the atoms in the sand were moving more quickly best describes why the temperature of the sand is increased. The relationship between kinetic energy and temperature is explained here.

The temperature of a body is directly proportional to the kinetic energy. The energy acquired by those molecules which are in motion is called the kinetic energy.

The radiation of the sun falls on a number of objects on our surroundings. The objects absorb this energy till afternoon due to which they become hot.

When Maria walked in afternoon, the sand was hot as its particles have gained the kinetic energy due to which they move rapidly from one place to another. So that the sand feels more hot in the afternoon.

Thus the atoms in the sand were moving more quickly best describes the increase in temperature of the sand.

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Answer:

Hmm 65

Explanation:

Answer:

Carbon dioxide as well as water are needed for photosynthesis.

Explanation:

Answer:

So... for the element of PHOSPHORUS, you already know that the atomic number tells you the number of electrons. That means there are 15 electrons in a Phosphorus atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and five in shell three.

Answer:

0.2923 molar

Explanation:

M = given mass /(molar mass× volume)

150/342(1.5)

150/513

0.2923M

Answer:

behavioral, physiological, structural

Explanation:

hi Hope's this helps lapras

Prevailing winds bring air from one type of climate to another. For example, warm winds that travel over water tend to collect moisture as they travel; the water vapor in the air will condense as it moves into colder climates, which is why temperate coastal areas often receive heavy rainfall.

Hope it Helps! T^T

Answer:

u just put T and t in all of the boxes

Explanation:

like this

T t

T t

and see how many times you get a dominant one which is 2 T T

i dont know if u understand I took this a long time ago i forgot my bad if it's hard to understand

Answer:

Bismuth oxalate

Explanation:

The best answer is

A) The atoms in the mineral get rearranged

Explanation:

Answer:

Chloroplasts! :)

Explanation:

Hope this helps

According to the diagram shown, location A will receive least amount of snow in the form of precipitation.

Precipitation is defined as any liquid or frozen water which forms in the atmosphere and then gets received on Earth.It is one of the most important steps of the water cycle.

Precipitation takes place in form of clouds when water vapor gets accumulated in clouds and they get bigger and heavy, when the clouds become heavy enough they fall to the land in the form of rain.If a cloud is present at higher altitudes , the water present in the clouds freezes and fall to the ground in form of snow,hail.

Precipitation occurs always in case of fresh water because the sea salt does not evaporate with the water.The different types of precipitation are rain, drizzle,snow,snow hail,etc.

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