How many moles of water are produced when 5 moles of hydrogen gas react with 2 moles of oxygen gas? (5 points)
2 moles of water
4 moles of water
5 moles of water
7 moles of water

Answer:

D

Explanation:

I took the test ^^

Answer: the answer is D. The subduction of oceanic crust helps drive convection currents inthe mantle.

Explanation:

Answer:

The term poly implies many, so a polyatomic particle is a particle that contains more than one atom. Hence it is not the same as monatomic particles, which contain just a single iota. Instances of monatomic particles incorporate Na+ and Cl-

Answer:

The ions which contain more than one atoms behaving as a single unit are called polyatomic ions. For example, PO43−,CO32−

Explanation:

Badrd on the graph provided, it can be concluded that:;

Human activities have on the most part affected wildlife negatively.

Humans activities such as construction of dams across rivers have being demonstrated to negative affect the habitat and hence the population of aquatic organisms in the area.

The data shown on the graph shows a steep decrease in the population of the striped bass after the construction of the dam in 1958.

Therefore, it can be concluded that the population of the striped bass has been on a steady decline since 1958.

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Answer:

Ammonia is a chemical compound used as a fertilizer because it is rich in nitrogen. Its chemical formula is NH3, which means that it consists of one atom of nitrogen and three atoms of hydrogen per molecule.

A chemical formula is a symbolic representation of a chemical compound. It tells us about the number of atoms present in the compound. The chemical formula of ammonia is NH₃.

An inorganic compound which is composed of nitrogen and hydrogen with the formula NH₃ is called the ammonia. It is a colourless gas with pungent smell. It is lighter than air and it can be easily liquified due to the strong hydrogen bonding between the molecules.

In ammonia there are 3 bond pairs and one lone pair around the central nitrogen atom. According to VSEPR theory, these tend to stay as far apart as possible to minimize mutual repulsion. Hence they arrange themselves in tetrahedral manner.

However due to the lone pair of electrons, the actual geometry of the molecule is trigonal pyramidal. One of the most important feature of ammonia is that it is a weak base.

Thus the chemical formula of ammonia is NH₃.

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Answer:

our search - If NaCl has a solubility of 36. 0 g in 100. G of H2O at 20∘C, how many grams of water are ... - did not match any news results.

Suggestions:

Explanation:

Answer:

the first is unbalanced

because the number of hydrogen are not equal on both sides

the second one is balanced

because the number of nitrogen and hydrogen atoms are equal on both sides

and the third one seems to be incomplete

Answer:

12 grams

Explanation:

2Mg + O₂ → 2MgO

This means that 2 moles of Magnesium reacts with 1 mole of Oxygen gas to form 2 moles of Magnesium Oxide (refer to Gay Lussac's law i.e when gases react they do so in volumes that bear a simple ratio to one another and to the products formed (in gaseous state) provided that temperature and pressure are kept constant)

Thus, 12g of Mg = 12g of MgO because the mole ratio of Mg to MgO is 2:2

Answer:

Propane burns in air according to the following equation:

C

3

H

8

+5O

2

→3CO

2

+4H

2

O.

1 mole of propane combines with 5 moles of oxygen.

Volume is directly proportional to the number of moles.

1 cm

3

of propane will combine with 5 cm

3

of oxygen.

Only 20% of air contains oxygen. So 1000 cm

3

of air contains 1000cm

3

×

100

20

=200cm

3

of oxygen.

The volume of propane that is consumed on using 1000 cm

3

of air is

5

200cm

3

=40cm

3

.

Reaction

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Avogadro: at the same T and P, the ratio of gas volume = the ratio of gas moles  

volume of CO₂ = 3/1 x 25 = 75 m³

Answer:

3 to 4 days is how long you can keep cooked beef in the refrigerator

Answer:

Gas molecules move at random with no attractive forces between them.

Explanation:

Kinetic-molecular theory is based on the following postulates, or assumptions.

Gases are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion.

These particles move in a straight line until they collide with another particle or the walls of the container.

These particles are much smaller than the distance between particles. Most of the volume of a gas is therefore empty space.

There is no force of attraction between gas particles or between the particles and the walls of the container.

Collisions between gas particles or collisions with the walls of the container are perfectly elastic. None of the energy of a gas particle is lost when it collides with another particle or with the walls of the container.

The average kinetic energy of a collection of gas particles depends on the temperature of the gas and nothing else.

Answer:

2.82*10^23

Explanation:

please see attached for work!

Answer:

they do not separate to form lumps of sodium metal or to form chlorine gas.

Explanation:

While it's true that when a crystal of the ionic substance sodium chloride is dissolved in water the sodium and chloride ions separate from one another, they do not separate to form lumps of sodium metal or to form chlorine gas. Rather, they remain as single Na+ and Cl− ions, surrounded by water molecules

Answer:

Given, Mass of an object, m = 2kg

velocity, v = 2m/s

We have,

KE = 1/2 m v²

= 1/2 × 2 (2)²

= 1/2 × 8

= 4J

Hence, 4J is the required Kinetic energy.

Answer:

Thermochemistry

Explanation:

Thermochemistry is the area of study in chemistry that is concerned with the heat transfers that occur during chemical reactions.

Hope this helps.

Answer: 0.027 moles

Explanation:

Answer:

it's hydrogen

Explanation:

ig it's correct

Explanation:

C6H10

12(6) + 1(10)

= 72 + 10 = 82

The relative molecular  mass of the alkyne with 6 carbon atoms is 82 gram/mole.

Molecular  mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molecular mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molar mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

Molecular masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.Relative molecular masses are also calculated by the same method.

In case of an alkyne with formula C₆H₁₀ relative molecular mass is calculated as, 12×6 +1×10=82 g/mole.

Hence, the relative  molecular mass of an  alkyne with 6 carbon atoms is 82 g/mole.

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Answer:

C

Explanation:

I believe it is C but don't take my advice 100%.

Answer:

#1: The law of conservation of mass underpins the principles of stoichiometry. Because matter cannot be generated or destroyed, the mass of each element present in a chemical reaction's product(s) must be equal to the mass of each element present in the reactant (s).

#2: 3molH2:2molNH3

Explanation:

Question 1:

Question 2:

Explanation:

L&L previews exhibitors and their products on show at the latest installment of the leading label and package printing trade show, Labelexpo Europe 2017.

Labelexpo Europe 2017 takes place September 25-28 in Brussels, Belgium, and is set to be the biggest edition in the show's history.

As well as the below exhibitor-by-exhibitor preview, read Andy Thomas' opinion article on how Labelexpo Europe is broadening its horizons in 2017, and L&L editor James Qurk's leader from issue 4 on how boundaries are shifting and the term 'label' is being redefined. There's also a look at the new Automation Arena feature area debuting at Labelexpo Europe this year, and a lowdown on the Label Industry Global Awards 2017 finalists, also reported here, plus more on the new FoodSaveUV industry group that proposes food safe UV certification. And if you missed the pre-show webinar, catch up with it here.

Further, see the image gallery below for visual highlights of what will be presented on the show floor at Labelexpo Europe 2017.

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Any physical matter that is obtained or made from plants, animals, or the ground without undergoing a chemical process is called a natural material. This is a true statement.

Natural materials are the physical matters that are made from plants, animals and ground(environment) which has not been subjected to any chemical processes for modification.

But any natural material that has undergone any chemical process which has been designed and manufactured to fulfil a particular purpose is called a synthetic material.

Therefore, any physical matter that is obtained or made from plants, animals, or the ground without undergoing a chemical process is called a natural material.

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Answer:

B is the correct answer

The three (3) examples from the sword fighting scene that showed Inigo and the masked man's similarities are:

Inigo Montoya was one of the fictional character in the novel titled "The Princess Bride" and written by William Goldman's in 1973. Inigo hails from the village called Arabella and he was raised by his father Domingo Montoya, who was a master craftsman that makes sword.

In The Princess Bride, Inigo had a swordfight with a man in black (masked man) and they have the following things in common:

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Answer:

Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.

SO the answer is- D. All of the above

Explanation:

Answer:

Adult musk oxen in a herd surround their young to protect them from wolves.

Answer:

D

Explanation:

Answer:

1. The mass of the reactants must be equal to the mass of the products. The total number of moles of the reactants can be more or less than the total number of moles of the products.

2. Divide the mass of the reactant by its molar mass to find the number of moles of the reactant. Use the chemical equation to find the number of moles of the product. Multiply the number of moles of the product by its molar mass to find the mass of the product.

3. 2(108 g/mol)+32 g/mol=248 g/mol; (248 g/mol)(0.02 mol)=4.96 g

4. 19.5 g

5. 853.5 g

Explanation:

Quick Check 5/5

Multiply the number of moles of the product by its molar mass to find the mass of the product. Therefore, the correct option is option C.

A body's mass is an inherent quality. Prior to the advent of the atom as well as particle physics, it was widely considered to be tied to the amount of matter inside a physical body.

A student knows the mass of one of the reactants of a chemical reaction and wants to calculate the mass of one of the products of the reaction. Divide the mass of the reactant by its molar mass to find the number of moles of the reactant. Use the chemical equation to find the number of moles of the product. Multiply the number of moles of the product by its molar mass to find the mass of the product.

Therefore, the correct option is option C.

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Wave Current run parallel to the beach and carry particles from one place and deposit it to another place.

Wave current is the movement of large water particles in all directions which is created by strong wind . Currents can be temporary or long-lasting. It can occur near the surface or in the deep ocean. It carries particles from one place and deposit it to another place.

Therefore, Wave Current run parallel to the beach and carry particles from one place and deposit it to another place.

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Answer:

explanation:

Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added.

Answer:

react with acid that is added and make a base

Explanation:

Buffer solutions are made when a solution of weak acid is mixed with its conjugate base.

Here the buffer solution will react with the strong acid .