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3 years ago

Question 2(Multiple Choice Worth 2 points)

Chemistry

1 answer:

insens350 [35]3 years ago

6 0

Answer:

location on the periodic table

Explanation:

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How do you identify a mineral there are six things

LenKa [72]

A good example is the mineral<span> plagioclase. Plagioclase is a member of the feldspar group, but </span>there<span> is more than one type of plagioclase.</span>

5 0

3 years ago

What would happen to the volume of the container if the pressure is increased by a factor of 2

telo118 [61]

Answer:

volume of the container will decreases if pressure increases.

Explanation:

According to Boyle's law:

Pressure is inversely proportional to volume which means if pressure of a gas increases the volume of the gas will decreases as gas molecules will collide and come closer forcefully so volume will decreases. And its formula for determining volume and pressure is:

where "R" is a ideal gas constant

"T" is temperature and

"n" is number of particles given in moles while "V" is volume and "P" is pressure.

8 0

3 years ago

1.505 times 10^23 Na atoms

dybincka [34]

5.75g

Explanation:

Given parameters:

Number of atoms = 1.505 x 10²³atoms

let us find the number of moles and mass of this atom.

Solution:

The mole is convenient unit for reporting measurements in chemistry. It allows us to make mathematical calculations:

one mole of substance contains 6.02 x 10²³atoms

Number of moles of Na given = $\frac{1.505 x 10^{23} }{6.02 x 10^{23} }$ = 0.25moles

Mass of Na atom given = number of moles x molar mass

Molar mass of Na= 23g/mole

Mass of Na = 0.25 x 23 = 5.75g

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

8 0

3 years ago

PLEASE HELP ill be asking more questions for whoever wants to help THANK YOU:)

kupik [55]

Each reaction has its own characteristics which can be determined from the reactants and products

<h3>Further explanation</h3>

Every chemical reaction involves a compound consisting of reactants and products

Reactants are compounds that react and form new compounds called products

There are several forms of reactions that can occur, including single replacement, double replacement, synthesis, decomposition, etc.

A. substances after the arrow are called 1 products

The product compounds in this reaction are: CO₂ + H₂O

B. which substances are the reactants : sodium + water

and The product compounds : sodium hydroxide + hydrogen gas

Reaction

2Na(s) + 2H₂O → 2NaOH(aq) + H₂(g)

C. Mg + Fe₂O₃ → Fe + 3 MgO is an example of single replacement :one element replaces the other elements of a compound to produce new elements and compounds

D. Ca(OH)₂ + Al₂(SO₄)₃ → CaSO₄ + Al(OH)₃ is an example of double replacement : there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product

E. PbSO₄->PbSO₃ + O₂ is an example of decomposition : One compound breaks down into 2 components

F.C₂H₄ + O₂ → CO₂ + H₂O is an example of combustion : when Oxygen combines with hydrocarbon

3 0

3 years ago

Which of the following best describes compounds?

pshichka [43]

I would say A because they are two or more different elements bound chemically together and can only be separated chemically.

8 0

3 years ago

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