If 2 compounds have the same empirical formula, they are the same (same properties, structure, etc.) *

Answer:

288000 sec

Explanation:

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:

carbon dioxide, water, and sunlight.

Explanation:

Answer:

Mitosis

Explanation:

This is the process that cells reproduce and replace old or damaged cells.

Answer:

2H2S + 3O2 --> 2H2O + 2SO2

2 mol H2S/8 mol H2O = 0.25 mol

Explanation:

Reactants: H is 2; S is 1; O is 2

Products: H is 2; S is 1; O is 3

There are 3 oxygens so add a 2 to the H2O e and 3 to the reactants side.

H2S + 3O2 → 2H2O + SO2

Reactant side: H is 2; S is 1; O is 6

Product side: H is 4; S is 1; O is 4

Hydrogen is now out of balance, so a coefficient of 2 can be placed in front of H2S to give:

2H2S + 3O2 → 2H2O + SO2

Reactant side: H is 4; S is 2; O is 6

Product side: H is 4; S is 1; O is 4

Sulfur is unbalanced, so a coefficient of 2 can be placed in front of SO2 to give:

2H2S + 3O2 → 2H2O + 2SO2

Answer:

Mg(s)+2HCl(aq)→MgCL2(aq)+H2(g), what mass of hydrogen will be obtained if 100 cm3 of 2.00 mol dm−3 HCl are added to 4.86 g of magnesium?

Explanation:

Moles of metal, = 4.86⋅g24.305⋅g⋅mol−1 = 0.200 mol.

Moles of HCl = 100⋅cm−3×2.00⋅mol⋅dm−3 = 0.200 mol

Clearly, the acid is in deficiency ; i.e. it is the limiting reagent, because the equation above specifies that that 2 equiv of HCl are required for each equiv of metal.

So if 0.200 mol acid react, then (by the stoichiometry), 1/2 this quantity, i.e. 0.100 mol of dihydrogen will evolve.

So, 0.100 mol dihydrogen are evolved; this has a mass of 0.100⋅mol×2.00⋅g⋅mol−1 = ??g.

If 1 mol dihydrogen gas occupies 24.5 dm3 at room temperature and pressure, what will be the VOLUME of gas evolved?

sana maka tulong po

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

Answer:

Wait what?

Explanation:

Answer:

Explanation:

Here you go

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:

Explanation:

i notice that theri is no image so i wont be able to help you sorry

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:

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:

iron oxide11

Explanation:

iron oxide is the chemical compound with formula fe304. it occurs in nature as the mineral magnetite.

Answer:

The answer is Methane

Hope it helped

Answer:

Methane

Explaination:

The main greenhouse gases are:

Water vapor.

Carbon dioxide.

Methane.

Ozone.

Nitrous oxide.

Chlorofluorocarbons.

Answer:

The correct answer is "Electrons are transferred in an ionic bond"

Explanation:

The covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements, such as hydrogen H, oxygen O and chlorine Cl. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas. The shared electron pair is common to the two atoms and holds them together.

An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.

In conclusion, chemical bonds are made so that atoms can have their entire outer layer, and thus have a stable electronic configuration. In the ionic bond, when the metallic atom has only one electron in its outer layer and the non-metallic one needs an electron to complete its layer; The metallic atom seats its electron to the non-metallic one. In the same way, the electron is shared in the covalent bond in order to achieve equilibrium.  

Then, the main differences between the two bonds are that the ionic bond occurs between two different atoms (metallic and non-metallic), while the covalent bond occurs between two equal atoms (non-metallic). And in the covalent bond there is an electron compartment, while in the ionic bond there is an electron transfer.

So, the correct answer is "Electrons are transferred in an ionic bond"

Answer:

In ionic bonds, an atom donates an electron to another atom to stabilize it. The electron spends more time with the bonded atom.

In covalent bonds, atoms bond by sharing electrons equally.

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.

Find more on conductivity:

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Answer:covalent bonds

Explanation:

Answer:

iron comes first then after its gold

Explanation:

most reactive to least reactive

potassium

sodium

calcium

magnesium

aluminium

carbon

zinc

IRON

tin

lead

hydrogen

copper

silver

GOLD

platinum

hope this helps!!

have a great day :)

Answer:

yep you are correct.

Explanation:

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.

CuO+H2=Cu+H2O the equation is balanced.

Answer:

false darling

Explanation:

The volume of a gas in a cylinder is 1.35 L at a pressure of 2.15 atm, if the pressure is decreased to 1.86 atm then the new volume is 1.56 L.

Pressure is defined as the force applied perpendicular to the surface of an object per unit area over which the force is distributed.

It can also be defined as the force exerted on a given area.

Pressure can be expressed as

Pressure = force / area

There are mainly four types of pressure

Using the formula P1V1 = P2V2

As given P1 = 2.15, V1 = 1.35 and P2 = 1.86

So, V2 = P1V1 / P2

           = 2.15 x 1.35 / 1.86

           = 1.56 L

Thus, the volume of a gas in a cylinder is 1.35 L at a pressure of 2.15 atm, if the pressure is decreased to 1.86 atm then the new volume is 1.56 L.

To learn more about  pressure, refer to the link below:

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Answer:

Explanation:

Molar mass of N2 = 28.01

3.66 moles x 28.01 grams/mole = 102.5166

Answer:

D. Chemical weathering

Explanation:

Chemical weathering is the erosion or disintegration of rocks, building materials, etc., that are caused by chemical reactions. The green patina on the Statue of Liberty is a direct result of chemical weathering to copper.

Chemical weathering depicts the reaction of Copper of the statue.

This is defined as the disintegration of a  substance through chemical reactions.

The statue was said to be made of Copper which was oxidized by water and air thereby changing its color from silver to green is an example of chemical weathering.

Read more about Chemical weathering here https://brainly.com/question/974321