Please Help! Chemistry question

Answer:

Molicules

Explanation:

Becuse it is

Answer:

104g

Explanation:

Based on the law of conservation of mass, the quantity of zinc produced by reacting calcium and zinc carbonate would be 104g.

The law of conservation of mass states that "in a chemical system, the mass is always conserved as matter is neither created nor destroyed but changed from one form to another".

 In short;

         Mass of products  = Mass of reactants

Mass of products  = Mass of CaCO₃ + Mass of Zn

Mass of reactants  = Mass of Ca + Mass of ZnCO₃

   So;

               152g + Mass of Zn = 64g + 192g

                           Mass of Zn  = 64g + 192g - 152g

                           Mass of Zn  = 104g

Answer:

104g

Explanation:

math + science = 104g

Answer:

Explanation:

Sleet and freezing rain occur under very similar conditions. Sleet is pellets of ice that form when snow falls into a warm layer and melts into rain. The rain then falls into a freezing layer of air that is deep enough to refreeze the raindrops into pellets.

Answer: Temperature of a substance does not change during a phase change. Energy gained after the the solid melts increases the average kinetic energy or the temperature. Freezing. When liquid is freezing the energy flows out the the liquid.

Explanation:

Answer:

O The core

Explanation:

Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons. Which therefore means that the core is NOT a subatomic particle.

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Answer:

See explanation

Explanation:

First of all we must remember the statement of Dalton's atomic theory that atoms can neither be created nor destroyed. Clearly, chemical reactions involves rearrangement of atoms of reactant and product molecules.

Since straw contains carbon, hydrogen, and oxygen atoms, it is obvious that there are no gold atoms in it.

If there are no gold atoms in straw, then straw can not be converted into gold by any chemical process because that implies that gold atoms are being 'created' in violation of Dalton's theory.

Answer:

So they can communicate their results without confusion.

Explanation:

Answer:

kinetic theory of matter. when heat is added it excites the atoms and makes them vibrate.

Answer:

High melting and boiling points and therefore solid at room temperature

A crystalline structure

Ability to dissolve easily in water

Ability to conduct electricity well

Explanation:

The hypothesis mentioned in the question will be something like this

'If a substance is solid at room temperature, has a crystalline structure, dissolves easily in water, and conducts electricity well, then it likely contains ionic bonds. Otherwise, it likely contains covalent bonds'

We can see that all the items selected in the answer box were included in the hypothesis.

Answer:

C, B, D

good luck on your Chem!

comment if you have any questions!

Answer:4

Explanation:

Answer:

c.4 Just took the test!!!

Explanation:

An exothermic process releases heat causing the temperature of the immediate surroundings to rise in endothermic process absorbs heat and cools the surroundings so exothermic process releases heat while an endothermic process absorbs heat

Answer:

The most important thing to remember about ionic compounds is that they must be electrically neutral, i.e. the overall charge of a formula unit must be zero.

Ionic compounds are formed when cations, which are positively charged ions, form ionic bonds with anions, which are negatively charged ions.

The cations and anions are held together by the very powerful electrostatic force of attraction that exists between the opposite charges.

In your case, you know that the cation has a

4

+

positive charge and that the anion has a

1

−

negative charge.

In order for an ionic compound to form, you need the overall negative charge coming from the anions to balance out the overall positive charge coming from the cation.

In order to achieve that balance, you need to have four anions for every one cation, since

4

×

(

1

−

)

=

4

−

will balance out the

4

+

charge of the cation. This means that one formula unit of this ionic compound will contain one

Mn

4

+

cation and four

Br

−

anions

Mn

4

+

Br

1

−

⇒

Mn

1

Br

4

⇒

MnBr

4

As you can see, one way to remember this is that the charge of the cation becomes the subscript of the anion and vice versa - this is known as the crisscross method.

The name of the compound will be manganese(IV) bromide. The Roman numeral is used here because manganese can have multiple oxidation states.

Explanation:

mr freeze

The name of the given ionic compound [tex]\rm MnBr_4[/tex] is named manganese(IV) bromide.

Ionic compounds are chemical compounds that are formed by the electrostatic attraction between oppositely charged ions.

To determine the name of this compound, we need to follow the naming rules for ionic compounds.

In conclusion, the ionic compound [tex]\rm MnBr_4[/tex] is named manganese(IV) bromide.

Learn more about ionic compounds here:

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omg im so dumb i cant answer this question omg sorry im 302918291802832908310 years old and i cant think propertly

Answer:

is this a question or is this to just let us have free points?

Explanation:

Answer:

Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. ... Diffusion: Diffusion is the movement of particles from an area of higher concentration to lower concentration. The overall effect is to equalize concentration throughout the medium.

Answer:

5mL

Explanation:

mass divided by density is equal to volume so

3.9/.78 = 5

why does this work?

grams cancel when you divide g/g/mL and you are left with just mL

Answer:

Explanation:

Solar cell, Although there are many types of energy, the most efficient forms are renewable: hydro-thermal, tidal, wind, and solar. Solar energy has been proven to be the most efficient and effective among renewable energy sources for home and commercial use.

When it comes to surviving in the wild, campers and hikers also often depend on some sort of portable backup power source. Solar energy is one of the best backup power sources for emergency situations.

Human powered generators are the best energy source for the rescue team as it doesn't require any lengthy time consuming resource but only the power of single human being. Just like fossil fuels, the human power is a kind of renewable energy source that does no harm to the environment and can be used whenever required.

Answer:

K < Fe < Br < Kr

Explanation:

Given chemical elements;

      Potassium

      Iron

      Bromine

      Krypton

Problem; arrange in order of increasing electronegativity

Solution:

The electronegativity of an element measures the relative tendency with which the atoms of the element attracts valence electrons in the chemical bond.

 To solve this problem, we are going to use values of electronegativity from the Pauling's electronegativity table of elements;

       For;

            Potassium  = 0.8

            Iron = 1.83

            Bromine  = 2.8

            Krypton = 3.0

So;

  K < Fe < Br < Kr

Answer:

Explanation:

1) When solid Calcium oxide is added to dilute hydrochloric acid

   [tex]CaO(s)+2HCl(aq)[/tex]→[tex]CaCl2(aq)+H2O(l)[/tex]

2) When solid Calcium carbonate is added to dilute Hydrochloric acid

  [tex]CaCO(s)+ HCl(aq)[/tex]→[tex]CaCl2(aq)+ H2O(l)+CO2(g)[/tex]

clearly we observe the formation of CO2 from Calcium carbonate whereas no such gas is evolved from Calcium oxide

The difference between the reaction of HCl with calcium carbonate and calcium oxide is that with calcium oxide no carbon dioxide formation takes place, while with calcium carbonate carbon dioxide formation occurs.

The dilute HCl has been the acid that reacts with the base for the formation of salt and water. The addition of calcium oxide has been the resultant of the reaction that results in the formation of calcium chloride and water. The reaction has no brisk effervescence or gas release.

The reaction of Calcium carbonate with dilute HCl results in the same reaction with the formation of calcium chloride and water. However, in the reaction, there has been the release of the bubbles of carbon- dioxide formation.

For more information about calcium carbonate, refer to the link:

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Answer:

0.578 mol H₂SO₄

Explanation:[tex]\frac{3.48 * 10^{23}H2SO4}{1}[/tex] ×[tex]\frac{1 mol H2SO4}{6.02214*10^{23}molecules H2SO4}[/tex] =0.5778 mol H₂SO₄ = 0.578mol H₂SO₄

Answer:

without fission reactions you wouldn't react, and we need to react

Explanation:

Answer:

A - 18.01

Explanation:

You add the first part of the equation, then you subtract that number by the number given from the second half of the equation.

Answer:

eon,era, period

Explanation:

Answer:

period<era<eon

Explanation:

I took the test, sadly got a 70%.

Answer:

See explanation

Explanation:

We must remember that gases exhibit ideal gas behavior at ordinary temperature and pressure.

As the system approaches absolute zero gas laws begin to break down and the relationship linear  between volume and temperature (Charles law is broken).

Recall that, at absolute zero, the volume of an ideal gas would be zero and all molecular motion stops due to the fall in temperature and kinetic energy of the molecules.

The reason for linear should be explained below.

Since the system approaches absolute zero gas laws starts to break down and the relationship is linear  between volume and temperature  At absolute zero, the volume of an ideal gas should be zero and all molecular motion stops because to the fall in temperature and kinetic energy of the molecules.

Learn more about the temperature here: https://brainly.com/question/19258620

Answer:

Single Replacement

Explanation:

Synthesis Reactions:

A + B → AB

Combustion Reactions:

CₓHₐ + O₂ → CO₂ + H₂O

Double Replacement Reactions:

AB + CD → AD + CB

Single Replacement Reactions:

A + BC → AB + C

Given RxN: 2Al + 3FeO → Al₂O₃ + 3Fe

Answer: True

Explanation:

I did the ck-12 quiz