Chemistry High School

4. Balance the following equations (show work)
a.___H2(g) +___O2(g) →___H2O(1)

b.____Fe(s) +___O2(g)→___Fe2O3(s)

c.___Al(s) +___HCl(aq) →___AlCl3(aq) +___H2(g)

d.____CaCO3(s) +____HCl(aq) →____CaCl2(aq) +____CO2(g) +____H2O(1)

4. Balance The Following Equations (show Work)a.___H2(g) +___O2(g) ___H2O(1)b.____Fe(s) +___O2(g)___Fe2O3(s)c.___Al(s)

Answers

Answer 1

Answer:

a) 2H2+O2 = 2H²O

b) 4Fe+30²=2Fe²O³

c) 2Al+6HCl=2AlCl³+3H²

Related Questions

. The best way to separate sodium chloride solution and sand is by:​

Answers

Answer:

Dissolving the mixture in water, filtering and then perform evaporation on the filtrate

what are some chemical properties of lead besides it’s melting and boiling points

Answers

Answer:

Atomic mass. 207.2 g.mol -1. Electronegativity according to Pauling. 1.8. Density. 11.34 g.cm-3 at 20°C. Melting point. 327 °C. Boiling point. 1755 °C.

Explanation:

i think

iron and silfianite i think..........

PLZ HELP

Observe: To model how hydrogen and oxygen react to make water, type “H2+O2” into the Reactants box and “H2O” into the Products box.

As the equation is written, which element is not in balance? ________________________

Explain: __________

Answers

Answer:

Observe: To model how hydrogen and oxygen react to make water, type “H2+O2” into the Reactants box and “H2O” into the Products box.

As the equation is written, which element is not in balanced?

oxygen isn't balanced...

Explanation:

in reactants there is 2hydrogens and 2 oxygen

but in product there is balanced no if hydrogen bt there is only one no of oxygen

Please hwelp mee with thwis..
Pwease just answer it on a correct answer and I'll give swome THANKS and 5 RATINGS.. Especwially I'll MARK IT AS BRAINLIEST..
Thank You if someone answer this!!
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Answers

[tex]\color{white}{ \colorbox{black}{\colorbox{pink} {answer}}}[/tex]

1. matter

2. oxygen

3. water

4. hydrogen

5. compound

hope it helps :)

which two of the four quantum numbers determine the energy level of an orbital in a multielectron atom?

Answers

Answer:

Therefore both Principal quantum number (n) and angular momentum quantum number (1) are responsible to energy level of an orbital in a multi electron atom.

Explanation:

Hope this helps.

A block of aluminum weighs 50.0g it's density is 2.70 g/cm3 what is the volume of a block

Answers

Answer:

18.51g/cm³

Explanation:

Mass=50.0g

Density =2.7g/cm³

Volume =Mass/Density

Volume =50/2.7

Volume =18.51g/cm³

ch3cooh + naoh ?????????????

Answers

Answer:

CH3COOH+NAOH=.>CH3COONA+H20

Explanation:

The
6.
1. 0,005
5x10 3.
7.
2. 5,050
=
88104
8.
3. 0.0008 =
1 X 103
9.
4. 1,000 =
10
10
5. 1,000,000 =

Answers

Answer:

So the asnwer is 66666666666666666666666666666666666666666666666666666666666666666666666666666666666668888844444444444444444443299997832........................................................4563ygfdjuzgu3456655555555555555555555553444446445444444555554

Explanation:

chemical equation why calcium oxide is a basic

Answers

In reaction with the acid, the metal oxides form salt and the water. ... When the metal oxides are reacting with the water, they form strong bases. The calcium oxides when reacting with the water form a strong base. Therefore, Calcium oxide is a base.

The atomic number tells you the number of_______ in one atom of an element. It also tells you the number of_________ in a neutral atom of that element. The atomic number gives the indentity of an element as well as its location on the Periodic Table. No two different element will havr the________ atomic number

Answers

Explanation:

script ok script ok ok ok

Fe-C-Cr alloy is covalent or ionic?

Answers

Answer:

covalent....................

can evaporated milk be substituted for heavy cream?

Answers

Answer:yes

Explanation:

• An atom of _________ has an atomic mass of ______ because it has ______ protons and _____ neutrons ?

Answers

Answer:

carbon 12 6 6

Explanation:

what does temperature measure

Answers

Answer:

Average kinetic energy that's the answer

Answer:

hotness or coldness

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

the ion with 36 electrons, 34 protons, and 44 neutrons

Answers

While the number nuclear protons as given is 34, and therefore we deal with the element selenium, there are 2 more electrons than protons, and therefore this species has an overall
2
−
charge.
We represent this selenide ion as
S
e
2
−
. Do I win 5 pounds?

Z= 34, therefore the atom is selenium

why did rutherford think that all of the alpha particles would go straight through?

Answers

The fact that most alpha particles went straight through the foil is evidence for the atom being mostly empty space. A small number of alpha particles being deflected at large angles suggested that there is a concentration of positive charge in the atom.

Is density a characteristic property of water?

Answers

"Density is a characteristic property of water because the density of any sample of water (at the same temperature) is always the same. The density is 1 g/cm3." - Mazza

It is a characteristic property of water because the density of any sample of water (at the same temperature) is always the same.

when you receive fluid in the hospital, it is often 0.9% saline solution. what would happen if the nurse used distilled water instead?

Answers

Answer:

The distilled water solution would be hypotonic to your blood cells, so they would gain water, swell, and possibly burst.

HELP PLZZZZZZZ ASAP
Which best describe the kinetic energy of the particles in solids, liquids, and gases? Check all that apply.


Particles in solids have low kinetic energy.

Particles in solids have high kinetic energy.

Particles in liquids have moderate kinetic energy.

Particles in liquids have low kinetic energy.

Particles in gases have high kinetic energy.

Answers

1,3 and 5 are the correct answers:))
1, 3, 5 are right
Solids have the lowest amount of kinetic energy and particles in gases have the highest

is CuCl2 polar or nonpolar ?

Answers

CuCl2 is a polar covalent bond.

Someone pls help me I will mark you as brain

Answers

Answer:

1st one is the answer water cannot be purified by nature pls add me in brainliest

I will make you brainless answer this 1 Question !
Direction: Answer the missing word​

Answers

Answer: This means that the color of light with a higher frequency will have a lower wavelength and valence electron energy level.

Explanation:

Are cations nonmetals
and anions are metals?

Answers

Answer:

First, each element that forms cations is a metal, except for one (hydrogen), while each element that forms anions is a nonmetal. This is actually one of the chemical properties of metals and nonmetals: metals tend to form cations, while nonmetals tend to form anions. Are positive ions metals or nonmetals?

Explanation:

what is change in science??

Answers

Answer:

A transition from one accepted theory to another or from one employed method to another.

Explanation:

Which diagram or diagrams represent a compound?

Answers

Answer:

x and z cuz compound are group of molecules or atoms

HELP ASAP!!!
What is the molarity of 930 mL of LiCl solution that contains 139.9 g of LiCI?
A. 3.5 mol/L
B. 150 mol/L
C. 3.3 mol/L
D. 3.5 x 10-3 mol/L

Answers

Answer:  A) 3.5 mol/L

Explanation:

To determine the molarity, we have to find the number of moles in the volume given, and then extrapolate to find the number of moles that would be in 1 L.

Determine the moles in the given volume

moles of LiCl = mass ÷ molar mass

                       = 139.9 g ÷ 42.39 g/mol

                       = 3.30 mol

Find the moles in 1 L

    Since 930 mL of LiCl    =   3.30 mol

    then 1000 mL of LiCl    =   (3.30 mol × 1000 mL/L) ÷ 930 mL

                                           =  3.55 mol/L

Which element has the greatest first ionization energy?


B


C


Be

Li

Which statement is true about the ionic size of the elements in a group as one moves from bottom to top in that group?


Ionic size decreases from bottom to top within the group.


Ionic size increases from bottom to top within the group.


Ionic size does not vary in any predictable way within the group.


Ionic size stays the same within the group.

Answers

Answer:

helium

Explanation:

The first ionization energy varies in a predictable way across the periodic table. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

Answer: 2nd answer " C "

Explanation:

First ionization energy is a periodic trend that increases up and to the right on the periodic table. After looking at the position of these elements on the periodic table, carbon is clearly the best answer-choice (B) aka " C "

Which of the following is NOT a way that water moves from the land to the atmosphere?

Answers

percipitation will be the right answer.

what is the maximum wavelength of photon that will eject a ground state electron from a hydrogen atom?

Answers

Answer:

9.13 x 10^-8 m

Explanation:

The maximum wavelength of photon that will eject a ground state electron from a hydrogen atom is 9.18 * 10^-8.

What is wavelength?

Wavelength is defined as the distance between identical points in the adjacent cycle of a waveform signal propagated in space or along the wires.

Wavelength is calculated as wave speed and frequency.

Wavelength = speed/frequency

SI unit of wavelength is meter.

A ground state atom is an atom in which total energy of the electron can not be lowered by transferring one or more electrons to different orbitals.

Thus, the maximum wavelength of photon that will eject a ground state electron from a hydrogen atom is 9.18 * 10^-8.

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

https://brainly.com/question/12924624

#SPJ2

Why silicone and germanium are useful in electronic industry????​

Answers

Answer:

: Each has four valence electrons, but germanium will at a given temperature have more free electrons and a higher conductivity. Silicon is by far the more widely used semiconductor for electronics, partly because it can be used at much higher temperatures than germanium

Explanation:

have a great day

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