Chemistry High School

Can someone help me please!(I will mark you brainliest)

Answers

Answer 1

Answer:

ok Look at it and tell me if you think its correct :}

Related Questions

which equation is derived from the combined gas law?

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Answer:

The correct answer is V1/T1=V2/T2.

Explanation:

Just took the test

Answer:

Its A on edge :)

Explanation:

Use the periodic table to identify the number of valence electrons available for bonding for each of the following elements.

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Answer: Edgy, 2020

Explanation: <3

Answer:

refer to picture below :)

Explanation:

How are a mole and a dozen similar?

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each name is a given number of objects

Answer:

Each names a given number of objects.

Explanation:

how can one separate and collect the solvent from a salt solution

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Simple distillation is a method for separating the solvent from a solution

EXAMPLE: water can be separated from salt solution, because water has a much lower boiling point than salt. When the solution is heated, the water evaporates.

Which physical properties do glass and ice share? Select the two correct
answerS.
DA Density
D B. State
DC. Melting point
D D. Brittleness
SUBMIT

Answers

B, C

verified just did it

B. State

C. Melting Point

Both ice and glass comes under the category of solids since they have definite shape and definite volume. Both the ice and glass allows light to pass through it, that means they are transparent in nature.Ice floats, we can infer that ice must be less dense than water. If water is frozen in a glass jar, the glass jar breaks. This implies they both have similar densities.

Thus, options B and C are correct.

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Which of these chemical equations demonstrates the law of conservation of mass?
F. C3H8 + 4 O2 → 3 CO2 + 4 H2O
G. 2 H2 + O2 à 2 H2O
H. H + O à H2O
J. Mn(OH)2 + H3PO4 à 2Mn3(PO4)2 + 2H2O

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Answer:h

Explanation:

Can someone please help me with this???

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Answer:

80 protons, 80 electrons, 121 neutrons

42 protons, 42 electrons, 54 neutrons

Symbol is Cu, Mass is 64, 29 Protons

Atomic number is 6, 6 protons, 6 electrons, 6 neutrons

Symbol is P, 15 protons, 15 electrons, 16 neutrons

Atomic number is 82, 82 electrons, 125 neutrons

Mass is 23, 11 protons, 11 electrons.

Hopefully this helps!

What is the name given to the group 0 elements

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Answer:

the noble gases

What is the molar mass of phosphorus pentachloride and uranium hexafluoride?

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Answer:

PCl₅ = 208.22g/mol. UF₆ = 352.03g/mol.

Explanation:

Find the atomic mass of each element–and if there's a subscript (you multiply the atomic mass by that much). P= 30.97g, Cl= 35.45g; 30.97+35.45(5) = 208.22g [same idea with UF₆]

Someone help with this ions and isotopes worksheet?

Answers

Isotopes are atoms of the same element that have different numbers of neutrons. Protons are positively-charged particles found in the nucleus of an atom.

Electrons are negatively-charged particles found in the outer shell of an atom. The charge on an element is determined by the number of protons and electrons present in the atom.

a.) Li+: number of protons = 3

Number of electrons = 2

charge of Li+ = +1

b.) Be2+: number of protons = 4

Number of electrons = 2

charge of Be2+ = 2+

c.) C4+: number of protons = 8

Number of electrons = 4

charge of C4+ = 4+

d.) O2-: number of protons = 8

Number of electrons = 10

charge of O2- = -2

e.) N3-: number of protons = 7

Number of electrons = 10

charge of N3- = -3

f.) C4- : number of protons = 4

Number of electrons = 4

charge of C4- = -4

g.) 14C6: The mass number = 14

Atomic number = 6

Number of neutrons = 8

h.) 18O8: The mass number = 18

Atomic number = 8

Number of neutrons = 10

i.) 19F9: The mass number = 19

Atomic number = 9

Number of neutrons = 10

j.) 40Ca20: The mass number =40

Atomic number = 20

Number of neutrons = 20

k.) 37Cl17: The mass number = 37

Atomic number = 17

Number of neutrons = 20

l.) 238U92: The mass number = 238

Atomic number = 92

Number of neutrons = 146

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elements have the same number of what when you move from the left of the periodic table to the right?

Answers

Electron shells hope this is right:)

Ans: On the periodic table, elements that have similar properties are in the same groups (vertical). From left to right, the atomic number (z) of the elements increases from one period to the next (horizontal). The groups are numbered at the top of each column and the periods on the left next to each row.

What is the force of attraction between two atoms that are combined?

a. chemical bond
b. atomic bond
c. physical property
d. magnetic bond

Answers

Answer:

Explanation

Chemical bond refers to the forces holding atoms together to form molecules and solids. This force is of an electric nature, and the attraction between electrons of one atom to the nucleus of another atom contributes to what is known as chemical bonds.

You are asked to get a compound that has a low melting point and cannot
conduct electricity, which would you pick if you saw three bottles labeled as Lici,
NaBr, and BrF. What type of bond did you get? *

Answers

Answer:

the third

Explanation:

_AICI3–> _AI + _Cl2
I need help

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Answer:

2AlCl₃ ⇒ 2Al + 3Cl₂

Explanation:

Balance the equation–making sure there's an equal amount of reactants and products on both sides.

Worth 50 points. Please answer correctly

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Answer:

question 2 is false

Explanation:

6 is D

Answer correctly please !!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!

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The ice cube i think is really cold

The picture is showing us how when you put a cold ice cube in a hot cup of water vapor comes out.

i will give braniliest
During World War II, the Nazi government in Germany imprisoned and murdered millions of Jews. This is known as the _____.
A.Fascism
B.Holocaust
C.Nationalism
D.Great Depression

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B. Holocaust
your welcome

Answer:

Explanation:

Are scientist improving the plant or corrupting it

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Answer:

46 percent of trees have been cut down.

Scienctists helps plants, but humans do destroy a lot of plants.

Scientists - helps increase plant growth.

Woodchoppers - helps decrease plant growth.

Question 5 (2 points)
Which of the following has a higher boiling point, CO2 or Co? Explain.

Answers

Answer:

CO2 has higher boiling point as compared to CO

Explanation:

Because CO is linear molecule anf zero dipole moment while CO2 is non linear and it has dipole moment

Which is the best example of forces acting in the same direction?

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An object is moving across a surface, but it does not gain or lose speed.

Food undergoes both physical and chemical changes during digestion. Which parts of the digestive process listed below is a physical change that takes place in the mouth?

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Answer:

To answer your question use the code ICE on here to get your answer works every time for me hope this helps

How is a doorbell an example of an electrical transformation

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because a doorbell transfers to inside the house to make noise

Based on table N of the reference tables what is the number of hours required for 42k (potassium -42) to undergo three half-life periods

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The number of hours required : 37.2 hours

Further explanation

Given

⁴²K (potassium -42)

Required

The number of hours

Solution

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.

Usually, radioactive elements have an unstable atomic nucleus.

Based on Table N(attached), the half-life for ⁴²K is 12.4 hours, which means half of a sample of ⁴²K will decay in 12.4 hours

For three half-life periods :

[tex]\tt 3\times 12.4=37.2~hours[/tex]

how does the octet rule predict the stability or reactivity of atoms.

Answers

Answer:

Explanation:

The octet rule allows chemists to predict the placement of electrons around the nucleus (electron orbitals), the identification of electrons added or lost during chemical reactions and the chemical reactivity of atoms based upon their particular electron configuration.

Consider X + Z -> ?

Assuming the following:

The product is an ionic compound.
Element X has 2 valence electrons
Elements Z has 6 valence electrons
Which general formula would be created?
A)ZX
B)Z^2x
C)XZ
D)X2^Z

Answers

Answer:

Explanation:

Element Z acquires two electrons from element X for stability

giving brainliest if correct!! please help someone out?

Answers

Answer:

protons: 36

neutrons:48

electrons:36

Explanation:

the number of protons in an element is = to the atomic # (36)

the number of neutrons is the atomic mass - atomic # (84-36=48)

In a neutral charged element the # of protons = # of electrons

*
What part does uplift play in the rock cycle?
A. It pulls rocks deep into Earth.
B. It pushes rocks up towards Earth's surface.
C. It breaks rocks into sediment.
D.It decreases pressure on buried rocks.

Answers

Answer:

Sometimes forces act to pull sections of the Earth's crust apart. At other times they are forced together. All this movement can cause rocks that were once underground to be brought up to the Earth's surface. This process is called uplift.

Explanation:

Hope this helped you out have a good day

What is the coordination number for Potassium Nitrate?

Answers

Answer:

The coordination number is 8

Potassium nitrate has an octahedral coordination structure

The coordination number for potassium nitrate is 8.

How much force is required to accelerate an 8-kg wagon at a rate of 15 m/s

Answers

Answer:

120 N

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 8 × 15

We have the final answer as

120 N

Hope this helps you

Can someone fill out the chart please?

Answers

Answer:

LOL i don't even know

Explanation:

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