Chemistry High School

Help chemistry!!!!!!!

Answers

Answer 1

a)magnesium-Mg-12-12-12-24
b)iron-Fe-26-30-26-56
c)argon-Ar-18-22-18-40

Related Questions

What is the mass of MgO required to make 800 mL of a 1.5M solution?
A) 1.2 g

B) 48.72 g

C) 0.03 g

D) 60.47 g

Answers

Answer:

B 48.72 g

Explanation:

i hope this helps

Need help on thissss

Answers

Answer:37

Explanation:

Because mass number is proton number + neutron number

Balancing Chemical Equations & Identifying Chemical Reactions
Balance the Equation Identify the Type of Chemical Reaction

_____P4 + __5__O2 _____P4O10 Combustion

_____Al2O3 _____Al + _____O2

Al: Al:
O: O:

_____H2O2 _____H2O + _____O2

H: H:
O: O:

_____CH4 ______C2H6 + _____H2

C: C:
H: H:

_____C + _____H2 _____C2H6

C: C:
H: H:
_____Fe + _____H2O _____Fe3O4 + _____H2

Fe: Fe:
H: H:
O: O:

_____N2 + _____H2 _____NH3

N: N:
H: H:

_____Na + _____O2 _____Na2O

Na: Na:
O: O:
_____NaCl + _____CaSO4 _____Na2SO4 + _____CaCl2

Na: Na:
Cl: Cl:
Ca: Ca:
SO4 : SO4:

_____C2H6 + _____O2 _____CO2 + _____H2O
C: C:
H: H:
O: O:

_____K + _____B2O3 _____K2O + _____B

K: K:
B: B:
O: O:

_____Na + _____NaNO3 _____Na2O + _____N2

Na: Na:
N: N:
O: O:

Challenge:

_____CH3CH2CH2CH3 + _____O2 _____CO2 + _____H2O

Answers

The answer is 17 and a half

Someone who looks after all of the different area managers in a large corporation such as in HR, Business Information, and Operations is called a:

Answers

The person who looks at the different area managers in a large corporation such as in HR, Business Information and Operations is known as a general manager.

What is organizational structure?

An organizational structure can be described as the process which involves dividing an organization into several functional units. A functional organizational structure is a kind of structure used to organize staff by categorizing them into several departments based on their roles or functions, skill sets, and knowledge.

These departments are vertically structured and may include IT, sales, finance and marketing, research, customer service, etc. The various departments are headed by functional managers who have the responsibility of managing, overseeing, and reporting to the executive management.

A manager is an individual who has the responsibility of providing guidance, supervision, support, and administrative control, as well as acting as a role model to the employees working in an organization.

Generally, managers are involved in taking up leadership roles and are expected to build strong relationships with their subordinates by providing a fair ground for effective communication and sharing of resources.

Learn more about organizational structure, here:

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Tin+Chlorine -> Chlorine -> Tin(IV) chloride

Answers

Answer:

what's the question?

Explanation:

Double and triple bonds form because

Answers

there are extra valence electron from each element in the compound, ergo, make another bond with the already existing one. resulting in an even stronger bond. eg CO2 has double bonds

Shown in the table below are solubility data for different salts in water at 60oC.
Which salt is most soluble at 60o C?

A, B, C, or D.

(Chart Below:)

Answers

Answer:

D is the most soluble in water at 60 degrees Celsius

According to the data given in the table, the salt is most soluble at 60o C - salt D.

In the given table it is given that all the salts are soluble in different concentrations in different concentrations of the water at the same temperature of 60 degrees celsius.

Salt A - 10/ 50 grams H₂OSalt B - 20/60 grams H₂OSalt C - 30/120 grams H₂OSalt D - 40/120 grams H₂O

Converting them in the same amount of H₂O that is 100 grams in the same ratio:

Salt A - 10/ 50 = x/100 gram = 20 gram/ 100 gram H₂OSalt B - 20/60 = x/100 grams = 33.3 gram/ 100 gram H₂OSalt C - 30/120 = x/100 grams = 25 gram/ 100 gram H₂OSalt D - 40/120 = x/100 grams = 50 gram/ 100 gram H₂O

Thus, the salt D is the most soluble that is 50 grams per 100 gram H₂O.

Learn more:

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First person with the right answer gets brainliest thanks (btw the numbers on the right are the answers choose the right one)

Answers

molar mass of FE2O3=2(55.85)+3(16)=159.7

2.56g*1mol/159.7*2mol/1mol*55.85g/1mol=1.79g

Organisms on earth are
th-based Ilfe forms.
hydrogen
oxygen
carbon
Hurryyyy!!

Answers

Answer:

carbon...?

Explanation:

Answer:

Carbon

Explanation:

Carbon makes up most of the building blocks of life. Hope that is right. Good luck

How do I convert this equation to a skeleton equation?
Methane gas + oxygen gas carbon dioxide + water

Answers

Answer:

2CH4 + 4O2 => 2CO2 + 4H2O

Explanation:

Mark brainly if it's helpful

Which is a NOT a freshwater source on Earth?
A. The ocean
B. The atmosphere
C. Surface water
D. Groundwater

Answers

Answer:

B the atmosphere it's not on earth and I'm pretty sure the atmosphere doesn't have water in

Explanation:

Look at the following equation.
Au O3 → _Au +_02
In order to follow the law of conservation of mass, this equation must have which set of coefficients, in order from left to right?

Answers

Answer:

Explanation: possible oxidation numbers of Au are +I and +III

Au2O3 ⇒ 2 Au + 3 O2

3) Two atoms have identical electron configurations. Which statement about the atoms
is true?
a) They have the same chemical properties.
b) They must have the same mass.
c) They must have the same number of neutrons.
d) They could be atoms of different elements in the same group.

Answers

I’m sure it’s C hope it helps!!

the apparent curving of winds due to earth's rotation is called the

Help please

Answers

it’s called the coriolis effect i believe

is this reaction oxidation or reduction
CH2=CH2 + OsO4 yields to HOCH2CH2OH

Answers

Answer:

it's definitely a oxidation reaction because here the oxygen contained OH group present in yeild

A picture of a patient’s lung showed it to be shriveled and darker than usual.

Which is most likely the cause of this lung condition?

A. smoking
B. overeating
C. sickle cell anemia
D. poor refrigeration

Answers

Answer:

Smoking

Explanation:

It has been proven time and time again to ruin lungs, effectively shortenning ones lifespan.

Explanation:

Smoking, because smoking causes these types of symptoms in long time smokers and people who start to smoke. also I know the answer cause my dad's a nurse.

How many aluminum atoms are in 2.26 g of aluminum?

Answers

Answer:

Aluminum atoms are in 3.78 g of aluminum

02214076x10^23)8.4367659370640769254888x10^22 atoms, therefore there are 8.4367659370640769254888x10^22 atoms of Aluminum(Al) present in 3.78 grams of Aluminum(Al).

Explanation:

what are greenhouse effect 1 paragraph and come friends
pls hurry

Answers

Answer:

The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.

Explanation:

Greenhouse gases are certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) that trap energy from the sun. Without these gases, heat would escape back into space and Earth's average temperature would be about 60º F colder.

the warming of the Earth's atmosphere that is caused by air pollution. Note: The greenhouse effect occurs when warmth from the sun is trapped in the Earth's atmosphere by a layer of gases (such as carbon dioxide) and water vapor.

In which area are you most likely to find sunny skies?

A Arizona

B. Mexico

C Texas

D. Colorado

Answers

it is probably a

but dont trust me since i dont live in the US

Answer:

I believe the answer is A, Arizona.

First person with the right answer gets brainliest thanks (btw the numbers on the right are the answers choose the right one)

Answers

the answer would be tan

Select the answer choice that is arranged from smallest to largest.

Answers

Answer:

Im like 75% sure that the answer is C.

Explanation:

Hope this helps! Have a great day. Remember your amazing and you got this! Alycia <3

ya i think C?????????????

This yellow nonmetal with a distinct odor is used in the manufacture of
gunpowder, the vulcanization of rubber, and in insecticides and
medicinal drugs.

Answers

Answer: it is Sulphur, S

Explanation:

which formation is a result of a hotspot

Answers

Answer:

Hotspots occur when one of the Earth's plates moves over an unusually hot part of the Earth's mantle. These hot areas are usually relatively stationary and result in large amounts of magma rising up, piercing a hole in the plate to form a volcano. As the plates move, a series of volcanoes can form.

A scientist is studying a liquid. If she lowers the temperature of the liquid,
which of the following will most likely occur? *PLEASE HELPPPPPPPPP*

The liquid will boil
The liquid will melt
The liquid will freeze
The liquid will evaporate

Answers

The liquid would evaporate

Describe at least two ways that carbon can get from the atmosphere to the hydrosphere.

Answers

Answer:

One way is that carbon dioxide automatically dissolves in cold ocean surface waters anyway so large bodies of water already have a concentration of carbon dioxide. Another way is when carbon dioxide dissolves in rainwater which later reacts with minerals in rocks. These rocks then get carried away by rivers or streams into bigger bodies of water and the carbon is transported through the minerals in the rocks.

EXTRA CREDIT. The rate at which an object moves is its speed. If a horse
walked 50m in 68s, cantered 150m in 35s, and galloped 300m in 22s, what
would its average speed be? Show your work! Help ASAP

Answers

Average speed is total distance divided by total time.

Total distance is 50 m + 150 m + 300 m = 500 m
Total time is 68 s + 35 s + 22 s = 125 s

Average speed is 500 m / 125 s = 4 m/s

How many Liters of I2 are produced when 241.6 grams of KI are reacted with excess CuBr2?

Answers

Answer:

8.15 L I2

Explanation:

So, I have the balanced equation of: 2CuBr2 +4KI → 2CuI + 4KBr + I2

Now, we do:

241.6g / 1 mol KI / 1 mol I2 / 22.4 L

--------------------------------------------------------- = 8.15 L I2

/ 166g KI / 4 mol KI / 1 mol I2

Hope this helps! ^u^

1. What is the density of a 75 g block of wood measuring 12 cm x 8 cm x 9 cm?

Answers

Answer:

0.087 g/cm^3

Explanation:

Density is Mass : Volume.

Volume = 12 x 8 x 9 = 864 cm^3

Mass = 75 g

Density = 75g/864 cm^3 = 0.087 g/cm^3

The density of a 75 g block of wood measuring 12 cm x 8 cm x 9 cm is 8.6 x 10⁻⁵ Kg/cm³.

What is density?

Density is defined as the mass per unit volume of the body. Mathematically-

ρ = M/V

Given is a 75 g block of wood measuring 12 cm x 8 cm x 9 cm.

We can write -

Mass = [m] = 75 g = 75/1000 = 0.075 Kg

Volume = [V] = L x B x H = 12 x 8 x 9 = 864 cm³

Therefore, the density of the object will be -

ρ = M/V

ρ = 0.075/864

ρ = 8.6 x 10⁻⁵ Kg/cm³

Therefore, the density of a 75 g block of wood measuring 12 cm x 8 cm x 9 cm is 8.6 x 10⁻⁵ Kg/cm³.

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Solve then following conversion problems:

(9.56 x 103) + (6.0 x 103)

(3 x 10-4) x (3 x 10-2)

(8 x 108) / (4 x 102)

could u please help? I'm screwed and I got a test coming up

Answers

Answer:

The first one is: 1602.68

The second one is: 72.8

The third one is: 2.11764705882

Hope this helps!

Sometimes the instructions say to round to the nearest hundreth, thousandth, or whole number. Make sure to check that before you enter any of these!!

50 POINTS!
What do you expect to happen to the reaction rate when the size of a solid reactant is changed describe increased in size or solid reactant effect on rate/decrease in size of solid react in a second on rate

Answers

Answer:

sorun nedir anlamıyorum seni türkçe yaz

When the concentrations of the reactants are raised, the reaction proceeds more quickly. This is due to an increase in the number of molecules that have the minimum required energy. ... When solids and liquids react, increasing the surface area of the solid will increase the reaction rate.

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