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3 years ago

What is in fire works

1 answer:

7 0

Traditionally, gunpowder used in fireworks was made of 75 percent potassium nitrate also called saltpeter mixed with 15 percent charcoal and 10 percent sulfur; modern fireworks sometimes use other mixtures (such as sulfurless powder with extra potassium nitrate) or other chemicals instead

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An organic compound was synthesized and found to contain only c, h, n, o, and cl. it was observed that when a 0.150 g sample of

Alexandra [31]

The composition is 25.1 % C, 4.22 % H, 9.79 % N, 49.7 % Cl, 11 % O.

We must calculate the masses of C, H, N, Cl, and O from the masses given.

Mass of C in 150 mg X =138 mg CO₂ × (12.01 mg C/44.01 mg CO₂) = 37.66 mg C

Mass of H in 150 mg X = 56.6 mg H₂O × (2.016 mg H/18.02 mg H₂O) = 6.332 mg H

Mass of N in 200 mg X = 23.8 mg NH₃ × (14.01 g N/17.03 g NH₃) = 19.58 mg N

Mass of N in 150 mg X = 19.58 mg N × (150 mg X/200 mg X) = 14.68 mg N

Mass of Cl in 125 mg X = 251 mg AgCl × (35.45 mg Cl/143.32 mg AgCl) = 62.08 mg Cl

Mass of Cl in 150 mg X = 62.08 mg Cl × 150 mg /125 mg X) = 74.50 mg Cl

Mass of O in 150 mg X = (150 – 37.66 -6.332 -14.68 – 74.50) mg = 16.8 mg

% C = 37.66 mg/150 mg × 100 % = 25.1 %

% H = 6.332 mg/150 mg × 100 % = 4.22 %

% N = 19.58 mg/200 mg × 100 % = 9.79 %

% Cl = 62.08 mg/125 mg × 100 % = 49.7 %

% O = 16.8 mg/150 mg × 100 % = <u>11 %</u>

TOTAL = 100 %

4 0

3 years ago

How does mass and acceleration affect force? (What happens to force if mass increases? What happens to force if acceleration inc

slava [35]

Explanation:

According to newton's second law; the acceleration is directly proportional to the unbalanced force and inversely proportional to the mass,

A = f/m

Force = m x a,

So, the force increases with the mass and acceleration.

3 0

3 years ago

Given the starting solution had a concentration of 1.25 m, how many moles of co[h2o]6cl2 were available in the amount of startin

siniylev [52]

Molarity of solution is defined as number of moles present in one liter solution. Mathematically, it is expressed as
Molarity = $\frac{\text{number of moles}}{\text{volume of solution(l)}}$

Thus, if 1 mole of solute is present in 1 liter solution, molarity of solution is 1 M.

In present case, initial conc, of solution was 1.25 M.

∴ Number of moles of <span>co[h2o]6cl2 available initially = 1.25 mole, if the solution is 1 liter</span>

3 0

3 years ago

What mass of sodium hydroxide will completely neutralize 2.5 mol of sulfuric acid?

VMariaS [17]

Given :

2.5 mole of Sulfuric acid $( H_2SO_4 )$ .

To Find :

Mass of sodium hydroxide will completely neutralize 2.5 mol of sulfuric acid

Solution :

Let us assume volume of water be 1 L .

Now , we know , to neutralize 1 mole of sulfuric acid we need 2 moles of NaOH .

So , for 2.5 mole sulfuric acid required 5 mole of NaOH .

Moles of NaOH ,

$n=M\times Volume \\\\n=5\times 1=5\ moles$

Molecular mass of NaOH , M.M = 58.44 g/mol .

Mass of 5 moles of NaOH :

$m=5\times 58.44\ g\\\\m=292.2\ g$

Hence , this is the required solution .

7 0

3 years ago

What are weak bonds that allow flexibility in an enzyme

34kurt

Enzymes are characterized to have weak bonds because their tertiary structure could easily bend and break because it will have to adjust to the shape of the substrate. It could be done via induced fitting or lock-and-key theory. These weak bonds are intermolecular forces like the London forces, electrostatic interactions and hydrogen bonding.

7 0

3 years ago