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3 years ago

How does the appear from earth

Chemistry

1 answer:

san4es73 [151]3 years ago

8 0

Answer:

Formation. When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.

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Suppose you are measuring the mass of a sample using a balance that employs a standard mass of density dw = 8.0 g/ml. what is th

sleet_krkn [62]

The buoyant force formula is:

$B = \rho Vg$

where $B$ is Buoyant force, $\rho$ is density, $V$ is displaced body volume and $g$ is $9.806 ms^{-2}$ (standard gravity).

The standard mass density of the sample, $\rho _{1}$ = $8 g/ml$

If the dansity of the sample, $\rho _{2}$ $< 8 g/ml$

The buoyancy correction is determined by the ratio:

$\frac{B_{1}}{B_{2}} = \frac{\rho_{1} Vg}{\rho_{2} Vg}$

$\frac{B_{1}}{B_{2}} = \frac{\rho_{1}}{\rho_{2}}$

$\frac{B_{1}}{B_{2}} = \frac{\rho_{1}}{\rho_{2}}>1$

Hence, the the buoyancy correction is positive.

5 0

3 years ago

The positively charged particle of an atom is called a(n)

Sveta_85 [38]

It is called a proton !

final answer: proton

7 0

3 years ago

Operations with units”: Determine the units of the answers to the following problems.

sammy [17]

Answer:

1) km 2) cm^ 3) no units (kg cancels) 4) g/cm^3 5) g 6) g°C

Explanation:

Like units will cancel ((m/km)*(km) = m

Non-cancelled units remain (ml)*(g/ml)*(°C) = g°C

5 0

3 years ago

A sample of As weighs 73.2 grams. Will a sample of Kr that contains the same number of atoms weigh more or less than 73.2 grams?

My name is Ann [436]

Answer:

This means a sample of 73.2 grams As atoms weighs less than the same amount of Kr atoms

Explanation:

Step 1: Data given

Mass of As = 73.2 grams

Molar mass As = 74.92 g/mol

Molar mass of Kr = 83.80 g/mol

Step 2: Calculate moles As

Moles As = Mass As / molar mass As

Moles As = 73.2 grams . 74.92 g/mol

Moles As = 0.977 moles

Step 3: Calculate As atoms

As atoms = moles As * number of Avogadro

As atoms = 0.977 moles * 6.02 * 10^23

As atoms = 5.88 *10^23 As atoms

Step 4: Calculate moles Kr

Moles Kr = Atoms Kr / number of Avogadro

Moles Kr = 5.88 * 10^23 Kr atoms / 6.02 *10^23

Moles Kr = 0.977 moles

Step 5: Calculate mass Kr

Mass Kr = moles Kr * molar mass Kr

Mass Kr = 0.977 moles * 83.80 g/mol

Mass Kr = 81.9 grams

This means a sample of 73.2 grams As atoms weighs less than the same amount of Kr atoms

8 0

3 years ago

HELP! URGENT Which of the following best states the relationship between erosion and deposition?

MariettaO [177]

The answer is A: When the energy transporting sediments diminishes, the sediments settle in a low-lying area; therefore, deposition always follows erosion

7 0

3 years ago