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Serga [27]
3 years ago
9

How many grams are in 1.6 moles of potassium bromide?​

Chemistry
1 answer:
slava [35]3 years ago
6 0

Answer:

190.4g

Explanation:

1.6mol of KBr (119.002g KBr/1 mol) = 190.4g

since you want to find grams, take the molar mass of KBr (119.002) per 1 mol and use it as your conversion factor (119.002g KBr/1 mol) which will then cancel out mols and leave you with grams.

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The ph of a 0.30 m solution of an acid, ha, is 5.20. calculate ka of ha.
julsineya [31]
When the acid is hydrolyzed, the reaction is

HA --> H⁺ + A⁻

So,

Ka = [H⁺][A⁻]/[HA]

Apply the ICE approach:

            HA --> H⁺ + A⁻
I          0.3        0      0
C         -X         +X   +X
E      0.3-X      X       X

Ka = [X][X]/[0.3-X]

X = H⁺ = A⁻
The formula for pH is:
pH = -log[X]
5.2 = -log[X]
Solving for X,
X = 6.31*10⁻⁶

Therefore,
Ka = [6.31*10⁻⁶][6.31*10⁻⁶]/[0.3-6.31*10⁻⁶]
<span>Ka = 1.33×10⁻¹⁰</span>
5 0
3 years ago
A chemist determined by measurements that moles of calcium sulfide participate in a chemical reaction. Calculate the mass of cal
Harman [31]

corrected question:

A chemist determined by measurements that 0.03 moles of calcium sulfide participate in a chemical reaction. Calculate the mass of calcium sulfide that participates

Answer:

Explanation:

number of moles of CaS

molar mass of CaS = 40+32 = 72g/mol

number  of moles = mass/ molar mass

mass = number of moles * molar mass

mass = 0.03 *72

mass of calcium sulfide = 2.16g

6 0
2 years ago
What is the density of PETE?
olya-2409 [2.1K]
The density of PETE is 1.38 g/cm3.

4 0
2 years ago
Complete the equation for the reaction of sulfuric acid and sugar (sucrose). C12H22O11 + 11 H2SO4 ? 12 + 11 H2SO4 + 11
serg [7]

Answer :

The complete equation for the reaction of sulfuric acid and sugar is,

C_{12}H_{22}O_{11}+11 H_2SO_4\rightarrow 12C+11H_2SO_4+11H_2O

By the stoichiometry of the reaction,

1 mole of sucrose react with the 11 moles of sulfuric acid to give 12 moles of carbon and 11 moles of water.

In this reaction, sulfuric acid react with sucrose (sugar). It dehydrates the sugar molecules which means it eliminates the water.

7 0
2 years ago
How many molecules are in 21.5G of water
NemiM [27]

Answer:

There are 6.022×1023 molecules in a mole. There are 18.01528 grams of water per mole of water. in 1g water

Explanation:

please Mark my answer in brainlist

6 0
2 years ago
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