Chemistry High School

science help me pleasee :)

Answers

Answer 1

Explanation:

during this reaction this will produce 2 molecules of No

Related Questions

explain in complete sentences how a convection current is created

Answers

Answer:

Convection currents are caused by the movement of the magma in the mantle.

Explanation:

Convection currents are caused by the movement of the magma in the mantle

Could really use some help with this!!! What are some chemical properties of nickel?

Answers

Answer:

Nickel is silvery-white, hard, malleable, and ductile metal.

It is a good conductor of heat and electricity.

It is bivalent, that is it has a valency of two.

The metal dissolves slowly in dilute acids.

Explanation:

Answer:

Atomic number: 28

Atomic mass: 58.71 g.mol

Melting point: 1453°C

Explanation:

I answered based off what i understood lol. I dunno if this is what you meant but here you go ig

if you want brainliest answer this pleaseeee

a bacterium has a length of 5.5 10-6 m but seen through a powerful microscope it appears to be 1.2 10-3 m. what is the magnification of the microscope?

a virtual image is produced by a convex mirror that is 1.60 cm from the mirror. if the magnification is 0.20 how far from the mirror is the object?

Answers

Answer:

what are the answer choices

Explanation:

Answer:

Explanation:

This planet has a toxic atmosphere.
O Mercury
O Venus
O Earth
O Mars

Answers

the answer is venus.

The minimum amount of energy that particles must have in order to react is known as the... what?

Answers

Activation energy

Hope this helps

Which layer in this model represents the least dense layer of the geosphere? - А B C D

Answers

Answer:

Explanation:

The area that represents the least dense part of the geosphere is the portion or region A.

Density is the determined by the packing of a layer.

The geosphere is the solid part of the earth Since A denotes the crust, it is the least dense part of the earth. In particular, the continental crust is the least dense part of the earth. During the differentiation of the earth, denser minerals gravitated towards the center and the lighter ones partitioned to the surface. This makes the crust the least dense portion of the earth

Answer:

the answer is A

Explanation:

a P e x

i swear if someone helps me with this I’ll give them the biggest hug lol

Answers

Answer:

Explanation:

Bc Look at it like this if norm and grav are equal aka the reason why hes not going threw the cement or flying in the air then the app and the fric are equal too or he would slip and fall

10. Which phase of matter is likely to be compressible and show rapid diffusion?
A. Gas
B. Liquid
C. Solid

Answers

Answer:

gas

Explanation:

because gas is compressible and has a lot of free space between particles

i) Mass of CO2 formed = 2.241 g Molar mass of CO2 = Atomic mass of C + 2 (Atomic mass of O) = 12 + 2 (16) g/mol = 44 g/mol Thus, moles of carbon dioxide formed

Answers

Answer:

0.05mole

Explanation:

Given parameters:

Mass of Carbon dioxide formed = 2.241g

Molar mass of Carbon dioxide = 44g/mol

Unknown:

Number of moles of carbon dioxide = ?

Solution:

To solve this problem, we use the expression below:

Number of moles = [tex]\frac{mass}{molar mass}[/tex]

Now, insert the parameters and solve;

Number of moles = [tex]\frac{2.241}{44}[/tex] = 0.05mole

How many formula units of magnesium hydroxide are found in 10.88 moles?

Answers

Answer:

10.88 moles of magnesium hydroxide contain 65.52 ×10²³formula units

Explanation:

Given data:

Number of formula units of magnesium hydroxide = ?

Number of moles = 10.88 mol

Solution:

The given problem will be solve by using Avogadro number.

The number 6.022×10²³ is called Avogadro number.

1 mole contain 6.022×10²³ formula units.

10.88 mol × 6.022×10²³formula units /1 mol

65.52 ×10²³formula units

Thus, 10.88 moles of magnesium hydroxide contain 65.52 ×10²³formula units .

Which option correctly matches the chemical formula of a compound with its
name?
A. N2O5, nitrogen oxide
B. N204, nitrogen oxide
C. N205, dinitrogen pentoxide
D. N204, dinitrogen pentoxide
SUBT

Answers

Answer:

N205 dinitrogen pentoxide

Explanation:

Trust me miss gorl

Answer:

the answer above is correct.....

Explanation:

Can somebody plz help answer this question correctly!! (Only 1-2 sentences is good) thanks !!

WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :DDD

Answers

I believe the worst form of pollution is fissile fuels because coal takes millions of years to form and why burn something that takes so long to make.

What is the name of this molecular compound> F6I5 pleasee and thank youuuu!

Answers

Answer:

hexaflourine pentaiodide

Explanation:

f = flourine (6 = hexa)

i = iodine (5 = penta) + ide

A gram is one million times larger than a microgram but one billion times smaller than a _______________.

Answers

Answer : A hectogram

Explanation:

Which pair of molecules have the same empirical formula?
Answer
A H2O and H604
B NaCrO4 and Na2Cr207
C K408 and K204
DC2H302 and C6H1206

Answers

C- K4O8 and K2O4
K4O8/4 =KO2
K2O4/2 =KO2

If the boiling point of HCl is -85 (C) and the boiling point of Hl is -36 (C),
what would be a good estimate for the boiling point of HBr? *

Answers

The boiling point of HBr is -66 (c)

How many moles of butane do we have if we have 5.50 x 1024 molecules
of butane (CH) ?

Answers

Answer:

9.14moles

Explanation:

Given parameters:

Number of atoms of butane = 5.5 x 10²⁴atoms

Unknown:

Number of moles = ?

Solution:

To solve this problem, we must understand that a mole of any substance contains the Avogadro's number of particles.

6.02 x 10²³ atoms makes up 1 mole of an atom

5.5 x 10²⁴ atoms will contain = [tex]\frac{5.5 x 10^{24} }{6.02 x 10^{23} }[/tex] = 9.14moles

explain what happens differently to an electron to emit different colors of light

Answers

atoms emit light when electrons in a higher energy orbital drop to a lower energy orbital. The energy of the emitted photon matches the energy lost by the electron and that energy determines the colour (blue is higher energy than red, UV even higher than blue and so on).

!!Please help I will name u brainliest!! this is for 9th grade physical science

Answers

Answer:

a. no 2 7 4 6

b. yes

c. no 3 2 6 1

d. no 2 1 2

a. 1 2 2 1

b. 3 1 3 2

c. 1 5 2

d. 1 1 2

Which kind of bond is formed when two atoms share electorons to form a molecule

Answers

Answer:

Covalent bond is formed by mutual sharing of electrons between two atoms

Explanation:

Covalent bonds are the most important means of bonding in organic chemistry. The formation of a covalent bond is the result of atoms sharing some electrons

Write the balanced chemical equation for the combustion of sodium metal

Answers

Answer:

sodium appears as a silvery soft metal that becomes grayish white upon exposure to air

Explanation:

molecular weight 22.989769 g/mol

modify dates 2021 -01-23

create dates 2004-09-16

pt The crystal lattice structure of an ionic compound
A. is weak due to the interactions of the ion
B. is weak due to the independence of the ions
OC. is strong due to the interactions of the ions
D. is strong due to the independence of the ions

Answers

Answer:

D. is strong due to the independence of the ions

Explanation:

In an ionic solid, the ions are packed together into a repeating array called a crystal lattice.

The concept of crystal packing assumes that the ions are hard spheres. successive layers over it.

The simplest arrangement is one in which the spheres in the base are packed side by side.

The crystal lattice structure of an ionic compound is strong due to the interactions of the ions. Therefore, option (C) is correct.

What are ionic compounds?

Ionic compounds can be defined as crystalline solids which are formed by closely packing ions of opposite charge due to the interactions of the ions. An Ionic compound is usually created when metal reacts with non-metal.

In ionic compounds, the ions are held together by ionic bonds due to the interactions of the ions. The ions are formed from atoms by gaining or losing electrons in order to attain their noble gas configuration.

A cation in ionic compounds refers to an electropositive ion and has the tendency to donate valence electrons. Similarly, anions in ionic compounds can be defined as electronegative ions and have a tendency to accept electrons.

In an ionic compound, there exists a large electrostatic force of attraction that forms a strong ionic bond.

Learn more about ionic compounds, here:

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HELPPP

The sum of percentage compositions must equal to 100 ±0.1.

True
False

Answers

Answer:

True

Explanation:

False it cannot be above 100%

What is the answer, and please make it fast.

Answers

the answer to this question would be A

The answer will be A

How many electrons are in Na+

Answers

Answer:

Explanation:

10 ELECTRONS ARE IN

Na+

What angle do parallel lines form when they intersect?

Answers

Answer:When two lines are cut by a transversal, the pairs of angles on one side of the transversal and inside the two lines are called the consecutive interior angles . If two parallel lines are cut by a transversal, then the pairs of consecutive interior angles formed are supplementary

Explanation:

How many significant figures are there in the measurement 0.0034 Kg?

Answers

Answer:

2 significant figures

Explanation:

Your measurement will have 2 significant figures, the two non-zero digits.

I hope this helps you out! :)

Answer:

there are 2 sig figs ( significant figures) which is 34. Zeros are not counted as significant figs in decimals like above

Why is graphite used for electrodes?

Answers

Answer:

Graphite is an electrical conductor, hence useful in such applications as arc lamp electrodes. It can conduct electricity due to the vast electron delocalization within the carbon layers (a phenomenon called aromaticity). These valence electrons are free to move, so are able to conduct electricity.

Explanation:

Graphite is used for electrodes because

The atomic structure of graphite results in a large number of electrons not being bonded, allowing them to migrate between the layers of graphite. It is this large number of free electrons (electron delocalization) that give graphite its excellent conductive properties. As well as being a good conductor, graphite is also cheap, robust and easily accessible.

Which description lists Earth's layers from most superficial to deepest?

Lithosphere, asthenosphere, lower mantle, outer core, inner core
Lithosphere, lower mantle, asthenosphere, outer core, inner core
Asthenosphere, Lithosphere, lower mantle, inner core, outer core
Inner core, outer core, lower mantle, asthenosphere, lithosphere,

Answers

Lithosphere, asthenosfhere , lower mantle

Answer:

Lithosphere, asthenosphere , lower mantle

Explanation:

took on edge 2021!

You have 0.00891 g of platinum. What is this in micrograms?
A. 8.91 ug
B. 8910 ug
C. 8.91 x 10-6 ug
D. 8.91 x 10-9 ug

Answers

Answer:

Hope it help you

Stayhomestaysafe

Plz mark my answer brainliest✍️✍️

Explanation:

It would be 8910 ug

REAL NAME - SHRESTH DUBEY

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