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kondaur [170]
3 years ago
5

In which type of chemical bonding are electrons shared among all atoms in the substance?

Chemistry
1 answer:
lisabon 2012 [21]3 years ago
7 0
In metallic bonding (bonding between two metals), electrons are shared between the atoms in the substance.
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0.005 molar Ca(OH)2 solution is used in the titration.calculate the pH oh solution
Rus_ich [418]

Ca(OH)₂: strong base

pOH = a . M

a = valence ( amount of OH⁻)

M = concentration

Ca(OH)₂ ⇒ Ca²⁺ + 2OH⁻ (2 valence)

so:

pOH = 2 x 0.005

pOH = 0.01

pH = 14 - 0.01 = 13.99

6 0
2 years ago
Ta, Os, Th are from metal?
Alex787 [66]

Answer:

Tantalium is a Transition metal.

Osmium is a Transition metal.

Thorium is radioactive Metal.

6 0
2 years ago
3. In a typical titration experiment a student titrates a 5.00 mL sample of formic acid (HCOOH), a monoprotic organic acid, with
ira [324]

Answer:

2.893 x 10⁻³ mol NaOH

[HCOOH] = 0.5786 mol/L

Explanation:

The balanced reaction equation is:

HCOOH + NaOH ⇒ NaHCOO + H₂O

At the endpoint in the titration, the amount of base added is just enough to react with all the formic acid present. So first we will calculate the moles of base added and use the molar ratio from the reaction equation to find the moles of formic acid that must have been present. Then we can find the concentration of formic acid.

The moles of base added is calculated as follows:

n = CV = (0.1088 mol/L)(26.59 mL) = 2.892992 mmol NaOH

Extra significant figures are kept to avoid round-off errors.

Now we relate the amount of NaOH to the amount of HCOOH through the molar ratio of 1:1.

(2.892992 mmol NaOH)(1 HCOOH/1 NaOH) = 2.892992 mmol HCOOH

The concentration of HCOOH to the correct number of significant figures is then calculated as follows:

C = n/V = (2.892992 mmol) / (5.00 mL) = 0.5786 mol/L

The question also asks to calculate the moles of base, so we convert millimoles to moles:

(2.892992 mmol NaOH)(1 mol/1000 mmol) = 2.893 x 10⁻³ mol NaOH

7 0
3 years ago
The density of sodium is 968 g/cm3. Suppose you need 250 gm of sodium for an experiment. Which volume of sodium do you need? a 2
Flauer [41]
Density = 968 g/cm³

mass = 250 g

Volume  = ?

Therefore:

D = m / V

968 = 250 / V

V = 250 / 968 => 0.26 cm³  

Answer C

5 0
3 years ago
Give me 3 facts and 3 Superstitious about the moon​
andreyandreev [35.5K]

Answer:

On this 40th anniversary of the moon landing, let's consider where these beliefs and urban legends come from.

Explanation:

im not sure.

6 0
2 years ago
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