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olasank [31]
3 years ago
12

please help!!! The gravitational force between the objects depends on the __________ of the objects and the ___________ between

them. fill in the blanks.
Chemistry
1 answer:
postnew [5]3 years ago
6 0
The gravitational force between the objects depends on the mass of the objects and the distance between them.
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To determine the concentration of an EDTA solution, 4.11 g of Zn metal was used. The volume of EDTA solution needed to reach the
USPshnik [31]

Answer:

2.23M

Explanation:

Molarity of a solution is calculated thus

Molarity = number of moles (n) ÷ volume (V)

According to this question, 4.11g of Zn metal was used in order to reach a volume of EDTA solution of 28.26 mL.

28.26mL = 28.26/1000

= 0.02826L

Using mole = mass/molar mass to calculate no. of moles of Zn

Mole = 4.11/65.4

mole = 0.0628mol

Molarity = 0.0628 ÷ 0.02826

Molarity = 2.23M

The concentration of the EDTA solution used is 2.23M

7 0
3 years ago
To achieve a complete set of valence electrons, atoms must fulfill the octet rule. What must atoms do to obey this rule?
jekas [21]

Either give off or gain electrons to make a total of 8

5 0
3 years ago
The hydrogen atoms of a water molecule are bonded to the oxygen atom by ________ bonds
Veronika [31]

Answer:

Covalent bonds.

Explanation:

Covalent binds where electrons are shared between the H and O atoms.

3 0
3 years ago
How are ionic bonds and metallic bonds different from each other?
leva [86]

Answer:

Ionic bond is bond between a metal and non metal , metallic bonding happens between positive metals ions and negative electrons in a metal

Explanation:

ionic Bond is the transfer of electrons between a metal and non metal due to strong electrostatic force of attraction between positive metal ions and negative non metal ions

in metallic bonding , there is a force of attraction between positive metal ions and the sea of electrons surrounding it

7 0
2 years ago
Read 2 more answers
You have 25.0 mL HCI of unknown concentration. It takes 12.5 of 0.2 M NaOH to neutralize the acid. Determine the concentration o
Fittoniya [83]
The balanced equation for the reaction between NaOH and HCl is 
NaOH + HCl ---> NaCl + H₂O
stoichiometry of NaOH to HCl is 1:1
during neutralisation, number of H⁺ ions = OH⁻ ions. Together they form water molecules and neutralise the solution as water is neutral.
Number of NaOH moles in 1000 ml - 0.2 mol
therefore in 12.5 ml -0.2/1000 x 12.5
                                = 0.0025 mol
at neutralisation point , number of OH⁻ mol = number of H⁺ ions
    since stoichiometry of base to acid is 1:1
number of HCl moles reacted = 0.0025 mol
concentration is the number of moles in 1000 ml
in 25 ml number of HCl moles - 0.0025 mol
Therefore in 1000 ml - 0.0025 mol /25 x 1000
  concentration of HCl - 0.1 M
8 0
3 years ago
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