Which equation is balanced? “Hint...count the atoms of each element. Only compare like elements!​

Answer:

Products are AgBr and KNO3

Answer:

The reaction begins and builds up heat. This heat causes the aluminum to melt and float on top of the liquid bromine (which is producing a cloud of vapor because the heat is also boiling it). Wherever the two elements meet, sparks, heat, and light are given off.

Explanation:

be more specific

Answer:

P,C,P,C,P,C,P,P,C,P

Explanation:

Answer:

B. thermal energy moves from a warmer object to a cooler object until all the substances are the same temperature

Answer:

the answer is D. Are made up of at least two

Explanation:

took the test on edge

Answer: 2d

Explanation:

Because you can not make a 2d

Answer: cell membrane

Explanation: Plzz mark me as brainliest!

Answer: There are many ways. (Check Explanation)

Explanation: Electrons are found outside of the nucleus. Now in the middle of the nucleus there are protons in neutrons. The way to determine the number of neutrons in the Bohr Model are many ways.

Number one, if the neutrons, protons, and electrons were color coded, take away the electrons and you are left with the 2. Then find out which color corresponds to the neutron.

If it isn't color coded, then the protons and electrons should usually be marked with either + or - on it. The one without any of this and that is in the nucleus is the neutron. Last but not least, on some of the models, it can show many protons or neutrons are in the nucleus. For example the potassium bohr model. (Check image) On here, 19+ means 19 protons and 20N means 20 neutrons.

Answer:

If you mean NaCl is table salt than true

but if you mean NaC1 than false

Explanation:

Answer:

This self evaluation helps them to better his sport.

Explanation:

This is the right way to evaluate the performance of John because this sketch shows him the way he perform in the match. Due to this sketch he can better his performance and remove all the mistakes he had done in the match which results in better performance of John in the next match. This self evaluation helps them to better his sport and got new chances in order to select for a better club or national soccer team.

Answer:

Substance at the beginning of a reaction- reactant

Substance at the end of a reaction- product

Number placed before a compound in a chemical equation- stoichiometric coefficient

Explanation:

In a reaction equation, the species written on the left hand side of the equation are called the reactants.

The reactants combine to form the species on the right hand side of the reaction equation called products.

The stoichiometric coefficient is a number written before the formula of a compound in the reaction equation.

Answer:

C. Equals the mass of all substances remaining after the change.

Explanation:

Antoine Lavoisier's 1789 discovery in regards to the Law of Conservation of Mass states that no mass is created nor destroyed in a chemical reaction.

Answer:

A

Explanation:

thanks me hehe lovelots

Answer:/

Explanation:

Answer:

what

Explanation:

I cant see your question yet

Answer:

the question really said :

Explanation:

Physical Properties

color (intensive)

density (intensive)

volume (extensive)

mass (extensive)

boiling point (intensive): the temperature at which a substance boils.

melting point (intensive): the temperature at which a substance melts.

Answer:

1.w

2. Z

3. Y

4.X

...................

.Answer:

Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.

Explanation:

Answer:

The volume will remain the same.

Explanation:

The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law)

There are so many gas laws like Charles's law, Avogadro’s law, Boyle 's law and many more. If pressure of gas is kept constant, then volume of the gas will be increasing.

According to Charles's law, gas expands on heating. At constant pressure, volume well be directly proportional to temperature.

According to ideal gas equation

PV=nRT

On keeping pressure constant the following equation can be deduced to Charles's law as

V₁÷T₁=V₂÷T₂

where,

V₁= initial volume

V₂= final volume

T₁=initial temperature

T₂=final temperature

According to Charles's law, the volume of a given gas sample is directly proportional to its absolute temperature at constant pressure.

Therefore, if pressure is kept constant, then volume of the gas will be increasing.

To know more about Charles's law, here:

https://brainly.com/question/16927784

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Answer:

Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air.

Explanation:

Answer:

Ionic bond is bond between a metal and non metal , metallic bonding happens between positive metals ions and negative electrons in a metal

Explanation:

ionic Bond is the transfer of electrons between a metal and non metal due to strong electrostatic force of attraction between positive metal ions and negative non metal ions

in metallic bonding , there is a force of attraction between positive metal ions and the sea of electrons surrounding it

Answer:

This is a very hypothetical question with a very scientifically hypothetical answer, keep in mind.

If Earth's axis tilted to 90 degrees, extreme seasons would cause intense climate change on every continent. During the summer, the Northern Hemisphere would experience nearly 24 hours of sunlight for months, which could melt ice caps, raise sea levels, and flood coastal cities.

Answer:

No of Moles in excess at the end of the reaction  is 0.25 moles

Explanation:

AgNO3  +   Mg3P2  → Ag3P + Mg(NO3)2

Balancing the equation we get

6AgNO3  +   Mg3P2  → 2Ag3P + 3Mg(NO3)2

6 moles of AgNO3 needs 1 mole of Mg3P2

using unitary method

AgNO3 = [tex]\frac{1}{6}*Mg3P2[/tex]

1.5 AgNO3 = [tex]\frac{1}{6}*1.5[/tex]

                  = 1/4 = 0.25moles of Mg3P2

So 1.5 Moles of AgNO3 requires 0.25Mg3P2 for complete reaction but we have 0.5Moles of Mg3P2 available Therefore Mg3P2 is in excess

No of Moles in excess at the end of the reaction = 0.5 - 0.25 = 0.25moles

Answer:

lose

Explanation:

as you have mentioned it has a electronic configuration as 2,1 that means it has one electrone in its last shell which is unstable. in ur mcq it has lose,gain.share

in order to be a stable atom lithium should either give away that one electron or gain 7 electrons. so as to ur question 7 electrons is out of the track so it is lose one electron

hope this helps

Answer:

c

Explanation:

The erosion starts at A moving sand or soil, then drops it at B-D.

Answer: I hope this helps :

An element in Group 5 = Bismuth (Bi)

A halogen = Fluorine (F) or Astatine (At)

An alkali Metal = Lithium (L)

A metal in Group 6 = Selenium (Se) , Tellurium (Te) , Polonium (Po)

A gas made up of individual atoms = Argon (Ag)

An element that forms 1+ ions = Lithium

The most reactive element in Group 1 = francium (it doesn't appear in the image)

The most reactive element in Group 7 = Fluorine

An element that is a good catalyst= Iron (Fe) Cobalt (Co) , Nickel (Ni)

An element that does not react with anything  = Argon

A metal that floats on water = Lithium

An element with a full outer energy of electrons = Helium (He), neon (Ne), and argon (Ar)

A transition Metal = Iron (Fe) Cobalt (Co) , Nickel (Ni)

A noble gas = Argon (Ar)

The element in Group 6 , Period 5 =   Molybdenum , Tellurium

A non-metal = Fluorine , Argon

A gas made up of Diatomic molecule = Argon (Ar)

An element that forms 1- ions =

The Group 1 element with the highest melting point =  Lithium

The Group 7 element with the highest boiling point = Astatine (As)

An element with 3 electrons in it's outer energy level = Boron

An element that forms coloured compounds = Iron

An element that has a coloured vapour = Chlorine  Fluorine

A metal that can form ions with different charges = Iron, Cobalt , Lead

Explanation:

Halogen : Are any of the six nonmetallic elements that make up Group 17  of the periodic table e.g  fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At).

All elements in Group 1 are Alkali metals( except hydrogen)

Examples :lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).

A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen)

Argon is one of the inert gases that normally exist as single atoms.

Transition metals are good metal catalysts because they easily lend and take electrons from other molecules. A catalyst is a chemical substance that,  does not affect the thermodynamics of a reaction but increases the rate of reaction.

Transition metals ; Scandium. Titanium. Vanadium. Chromium. Manganese. Iron. Cobalt. Nickel.

Noble gases(inert gases) don't react with anything . The family of noble gases includes helium, neon, argon, krypton, xenon, and radon.

Lithium is the lightest metal and has density about half of water.

Group 18 elements (helium, neon, and argon are shown) have a full outer, or valence, shell.

chlorine, fluorine, carbon, nitrogen, arsenic, phosphorus, selenium are examples of non-metal.

Noble gases : helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn).

The following 5 element gases are found as diatomic molecules at room temperature and pressure:

Hydrogen – H. ...

Nitrogen – N. ...

Oxygen – O. ...

Fluorine – F. ...

Chlorine – Cl.

Lithium, Li melts at 180°C.

From the lowest boiling and melting point to the highest, the group in order is fluorine, chlorine, bromine, iodine and astatine.

Like other transition metals, iron forms coloured compounds. The table shows some examples of these. Note that iron can form two different ions in its compounds. Iron(II) compounds contain the Fe 2+ ion and iron(III) compounds contain the Fe 3+ ion.

Elements in group seven(Halogens)  : As you move down the group the halogens become darker in colour. For example fluorine is a very pale yellow whereas iodine will be dark purple in colour when it is in a vapour state.

A few elements, all metals, can form more than one possible charge. For example, iron atoms can form 2+ cations or 3+ cations. Cobalt is another element that can form more than one possible charged ion (2+ and 3+), while lead can form 2+ or 4+ cations.