CHEMISTRY HIGH SCHOOL

Determine the number of centiliters in 2.4 x 10^3 milliliters.

Answers

Answer 1
Answer: 2.4(10^3)

=2.4*10^3

=2.4*(10*10*10)

=2400 milliliters

To centiliters is 2400mL= 240.0000cl. 
Answer 2
Answer:

2.4(10^3) To the power off  

=2.4*10^3

=2.4*(10*10*10)

=2400 milliliters

To centiliters is 2400mL= 240.0000cl.

Cl= Centiliters

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Which characteristics of the planets in our solar system increases as the distance from the sun increases?A- equatorial diameter
B-eccentricity of orbit
C- period of rotation
D-period of revolution

Answers

As the distance from the sun increases the PERIOD OF REVOLUTION increases which is the time it takes to a body to spin such as the sun

Summarize the main contributions of copernicus, brahe,kepler,galileo,and newton

Answers

Copernicus- developed heliocentric model, discovered the chemical element Copernicum has the symbol Cn and atomic number 112, started the scientific revolution.

Brahe- known for his precise and comprehensive astronomical and planetary observations, which heavily influenced future discoveries; built the maps of Hven that helps in accurate determinations of latitude and longitude.

Kepler - solved the mystery of the planets; believed the Solar System's planets orbited the sun in circular path that determined by an arrangement of the five platonic solids.

Galileo - Father of Modern Science; discovered the first moons ever known to orbit a planet other than Earth; first person to study the sky with a telescope; discovered the rings of Saturn; our moon has mountains; Milky Way is made up of stars; established that everything falls to the ground at the same rate regardless of weight; identified the parabola; proposed theory of relativity; discovered pendulums; tried to measure the speed of light; showed the set of perfect squares.

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Which element has the smallest atomic radius? calcium potassium scandium titanium

Answers

 The element  that has the smallest  atomic radius is  titanium


          explanation

  • Calcium,potassium,  scandium and titanium are in  period  4 in the periodic table.
  • Generally  the atomic   radius    decreases  across the period (from the left to the right) .  This is because  across the period  there is increase  in nuclear charge  which  make electrons been strongly attracted to the nuclear.
  • Titanium is in atomic number 22 thus it has  more nuclear  charge  that  calcium,potassium and  scandium therefore  titanium has the  smallest atomic radius.

Answer:

Which element has the smallest atomic radius?

❌calcium

❌potassium

❌scandium

✔titanium

What are the elements in the first vertical line of the periodic table?

Answers

The first vertical row of elements are all alkali metals with the exception of hydrogen which is a transition metal.The elements are:Hydrogen(H) with an atomic number of 1Lithium(Li) with an atomic number of 3Sodium(Na) with an atomic number 11Potassium(k) with an atomic number 19Rubium(Rb) with an atomic number of 37Cesium(Cs) with an atomic number of 55Fracium(Fr) with an atomic number of 87

How many mL of a stock solution of 2.00 M KNO3 are needed to prepare 100.0 mL of 0.15M KNO3? with work plz

Answers

Using the law of dilution :

Mi x Vi =  Mf x Vf

2.00 x Vi = 0.15 x 100.0

2.00 x Vi = 15

Vi = 15 / 2.00

Vi = 7.5 mL

hope this helps!

Which of the following is true of solids?a. All solids have equal melting points.
b. Ionic solids have higher melting points than molecular solids.
c. Molecular solids have higher melting points than all other types of solids.
d. It is impossible for solids to melt; therefore solids do not have melting points.

Answers

B. Ionic solids have higher melting points than molecular solids.
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