CHEMISTRY HIGH SCHOOL

The density of aluminum is 2.70 g/cm3. What is the mass of 235 cm3 of aluminum? 634.5 g
635 g
635 g/cm3
634.5 ml

Answers

Answer 1
Answer:

Answer:

JUST B

Explanation:
Answer 2
Answer:

Final answer:

The mass of 235 cm³ of aluminum, which has a density of 2.70 g/cm³, is calculated to be 634.5 g using the formula Mass = Density × Volume.

Explanation:

To find the mass of a given volume of a substance, you can use the formula: Mass = Density × Volume. In this case, the density of aluminum is given as 2.70 g/cm³ and you need to find the mass of 235 cm³ of aluminum.

Substitute the given values into the formula:

Mass = 2.70 g/cm³ × 235 cm³ = 634.5 g

Therefore, the mass of 235 cm³ of aluminum is 634.5 g.

Learn more about Density Calculation here:

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An airplane travels 4000m in 16 seconds on a heading of 35 degrees. What is it's velocity

Answers

All you have to do is divide 4000 / 16, that gives us 250 meters per second.

The blue color of the sky results from the scattering of sunlight by molecules in the air. The blue light has a frequency of about 7.03 × 1014 Hz. Calculate the wavelength (in nm) associated with this radiation, and calculate the energy (in joules) of a single photon associated with this frequency. Enter your answers in scientific notation.

Answers

Answer:

λ = 426.7 nm

E = 4.66 x 10⁻¹⁹ J

Explanation:

The equation of frequency is:

f = v / λ

v: velocity

λ: wavelength

λ = v / f

λ = 3 x 10⁸ m.s⁻¹ / 7.03 x 10¹⁴ Hz

λ = 426.7 nm

The energy of a single photon is

E = hf

h: Plank's constant = 6.63 x 10⁻³⁴ m²kgs⁻¹

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What type of reaction takes place when atoms or molecules rearrange to form new substances?

Answers

This is a chemical reaction.

Complete the formula. density = _____ weight/volume weight/length mass/length mass/volume

Answers

Answer: Option (d) is the correct answer.

Explanation:

Density is defined as mass per unit volume.

Mathematically,            d = (m)/(v)

where                     d = density

                              m = mass

                               v = volume

Density is also known as degree of compactness, that is, more closely the atoms are linked more will be the mass of object or atom. Hence, more will be its density.

Thus, we can conclude that density = (mass)/(volume)
mass/volume cause you divide to get density

Which of the following compounds are ionic compounds?CaCl2

C6H12O6

MgO

Na2O

SiO2

Answers

ionic compounds are compounds with ionic bonds, given by the exchange of electrons between a cation (positive ion) and an anion (negative ion).

ionic compounds usually consist of a metallic element and a non-metallic element.

as such, cacl2, mgo, and na2o are ionic compounds. c6h12o6 and sio2 consists of non-metallic elements only, so they do not form ionic bonds.
re: which of the following compounds are ionic compounds?
CaCI2 is an ionic compound.
C6H12O6 is a covalent compound.
MgO is an ionic compound.
Na2O is an ionic compound.
SiO2 is a covalent compound.
hope this helps

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Answers

Answer:

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Explanation:

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