CHEMISTRY HIGH SCHOOL

A mixture of sand and salt containig MgCl2 (100.0 g) is sprinkled on a section of pavement. The total estimated ice on the pavement is 10.0 kg. What is the freezing point of the ice (°C)? MM MgCl2 = 95.211 g/mol MM ice = 18.0148 g/mol

Answers

Answer 1
Answer:

Answer:

-0.6⁰c

Explanation:

find the solution below

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Gas occupies 30 Liters at 2.0 atm pressure and 27° Celsius. How many moles of gas are present
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Sandy went to the candy store and wanted to use dimensional analysis she had learned in class. She only had a certain amount of money to spend. In terms of price, she figured out the following: 6 lollipops = 5 gum balls, 10 lemon heads = 16 redhots, 8 gum balls = 9 lemon heads. If sandy knows she could buy 3 lollipops, how many lemonheads could she buy with the same money?
What elements fill the d orbitals on the periodic table?

Which element is rolled into a foil found and used in your kitchen?

Answers

The question is asking to determine what kind of element is rolled into a a foil and used in you kitchen, and base on my own research and also in understanding the elements, I would say that the answer would be Aluminum. I hope you are satisfied with my answer and feel free to ask for more 
aluminium ........................

Carbon atoms have four electrons in their outer shell. This means that a single carbon atom can form up to _______ bonds with other atoms.two
eight
four
six

Answers

If my memory serves me well, the correct answer looks like this: Carbon atoms have four electrons in their outer shell. This means that a single carbon atom can form up to four bonds with other atoms.

The answer is: four.

For example compound carbon dioxide (CO₂):

Electron configuration of carbon: ₆C 1s² 2s² 2p².  

Electron configuration of oxygen: ₈O 1s² 2s² 2p⁴.

Carbon atom is sp2 hybridized, it has three sp2 orbitals and one p orbital, they form four bonds.

Oxygen has two p orbitals, they form two bonds (one sigma and one pi bond).

p orbitals from carbon and oxygen overlap and form pi bond.

Most metals are not?

Answers

Most metals are not liquid at room temperature. They are typically solid and have a crystalline structure. Therefore, the correct option is option 3.

Metals are known for their high thermal and electrical conductivity, as well as their malleability and ductility. These properties allow metals to be shaped into various forms, such as wires and sheets, and conduct heat and electricity efficiently.

However, the majority of metals have a solid state at room temperature, with exceptions such as mercury, which is a liquid metal. The solid nature of metals is due to the metallic bonding between atoms, which involves the sharing of electrons within a sea of delocalized electrons.

Thus, the ideal selection is option 3.

Learn more about Metals, here:

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The complete question is -

Most metals are NOT-

Ductile

good conductors of heat and electricity,

liquid at room temperature,

malleable.
they are not liquid becuse they cant get spials.

To what volume in millimeters must 50.0 mL of 18.0 M H2SO4 be diluted to obtain 4.35 M H2SO4?

Answers

We know that to relate solutions of with the factors of molarity and volume, we can use the equation: M_(1) V_(1) = M_(2) V_(2)

**NOTE: The volume as indicated in this question is defined in L, not mL, so that conversion must be made. However it is 1000 mL = 1 L.

So now we can assign values to these variables. Let us say that the 18 M H_(2) SO_(4) is the left side of the equation. Then we have:

(18 M)(0.050 L)=(4.35M) V_(2)

We can then solve for V_(2):

V_(2)= ((18M)(0.05L))/(4.35M) and V_(2) =0.21 L or 210 mL

We now know that the total amount of volume of the 4.35 M solution will be 210 mL. This is assuming that the entirety of the 50 mL of 18 M is used and the rest (160 mL) of water is then added.

a) NaClO3 -> NaCl + O2------------------------DESCOMPOSICION b) HNO3 +Fe -> H2 + Fe (NO3)2------------SIMPLE SUSTITUCION c) Kl + Pb (NO3)2 -> Pbl2 + KNO3--------DOBLE SUSTITUCION d) C + O2 -> CO2-----------------------COMBINACION o SINTESIS e) Ca(HCO3)2 -> CaCO3 + CO2 + H2O--no estoy seguro pero en todo caso DESCOMPOSICION

Answers

a) 2 NaClO₃= 2 NaCl + 3 O₂  ( decomposition )

b) 2 HNO₃ + Fe = H₂ + Fe(NO₃)₂ ( single replacement )

c) 2 Kl + Pb(NO₃)₂ -> Pbl₂ + 2 KNO₃ ( double replacement )

d) C + O₂ -> CO₂ ( synthesis )

e) Ca(HCO₃)₂ = CaCO₃ + CO₂ + H₂O ( decomposition)

hope this helps!

What are the 5 areas of chemistry

Answers

The 5 main branches of chemistry are physics, analytical, biochemistry, organic chemistry, and inorganic chemistry.
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