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2 years ago

Which three statements about gravity and the formation of the solar system

Chemistry

2 answers:

Delicious77 [7]2 years ago

7 0

Answer:

B. Gravity held the pieces of forming planets together.

c. Gravity pulled most of the matter into the center of the solar system

D. Gravity caused the planets and Sun to have spherical shapes.

Explanation:

When a collection of grains pulled together by their gravitational forces would keep in by the gravity of a star, it would eventually became bigger to the point a planet was formed.

The sun's strong gravitational force pulled most of the matter around it to the center of the solar system.

The spherical shape of planets is a result of their gravity pulling equally from all sides, shaping it into a sphere.

Elodia [21]2 years ago

7 0

Answer:

B, C, AND D,

Explanation:

The guy on top is right

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(a) The rate of the reaction in terms of the "disappearance of reactant" includes the change in the concentration of the

Vaselesa [24]

Answer:

The average rate of the reaction in terms of disappearance of A is 0.0004 M/s.

Explanation:

Average rate of the reaction is defined as ratio of change in concentration of reactant with respect to given interval of time.

$R_{avg}=-\frac{[A]_2-[A]_1}{t_2-t_1}$

Where :

$A_1$ = initial concentration of reactant at $t_1$ .

$A_2$ = Final concentration of reactant at $t_2$ .

2A+3B → 3C+2D

$R_{avg}=-\frac{1}{2}\frac{[A]_2-[A]_1}{t_2-t_1}$

The concentration of A at ( $t_1=0 seconds$ ) = $A_1=0.0400 M$

The concentration of A at ( $t_2=20 seconds$ ) = $A_2=0.0240 M$

The average rate of reaction in terms of the disappearance of reactant A in an interval of 0 seconds to 20 seconds is :

$R_{avg}=-\frac{1}{2}\times \frac{0.0240 M-0.0400 M}{20-0}=0.0004 M/s$

The average rate of the reaction in terms of disappearance of A is 0.0004 M/s.

6 0

3 years ago

Differentiate between Fundamental unit and derived unit

Serga [27]

Answer:

Fundamental Units are the units which are independent of any other unit.

They do not depend on any other physical quantity for their measurements .

Derived Units are derived from Fundamental Units.

They are are products and/or ratios of the fundamental quantities that exist in a system of units.

Explanation:

8 0

3 years ago

Why argon is octent ??

Ira Lisetskai [31]

Answer:

argon is octet because it has eight electrons in its valence shell

Explanation:

6 0

3 years ago

Read 2 more answers

What would be the mass of 3 moles of water molecules?

ankoles [38]

Answer:

$\boxed {\boxed {\sf A. \ 54 \ grams }}$

Explanation:

To convert from moles to grams, we must use the molar mass.

Recall that water's molecular formula is H₂O. It contains hydrogen and oxygen. Look up the two elements masses on the Periodic Table.

Hydrogen (H): 1.008 g/mol
Oxygen (O): 15.999 g/mol

Now, use these masses to find water's mass. The subscript of 2 tells us there are 2 atoms of hydrogen, so we multiply hydrogen's mass by 2 and add oxygen's.