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Valentin [98]
3 years ago
6

CULINARY ARTS

Chemistry
2 answers:
natita [175]3 years ago
8 0
The correct answer is B: 3
nexus9112 [7]3 years ago
4 0
36 divided by 12 is 3. you need three times as much of the recipe to make 36 brownies. The answer is B
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How much sugar does a bottle of sparkling water have help me plz it for a science project
zubka84 [21]

Answer:

it has 0g of sugar (hopes this helps)

3 0
3 years ago
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Convert 678.92 cm into meters​
Anastaziya [24]

Answer:6.7892 meters

Explanation:

4 0
3 years ago
I need help with these
nikklg [1K]
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2 years ago
A 25.0-mL sample of 0.150 M hydrazoic acid, HN3, is titrated with a 0.150 M NaOH solution. What is the pH after 13.3 mL of base
tamaranim1 [39]

Answer:

pH ≅ 4.80

Explanation:

Given that:

the volume of HN₃ = 25 mL = 0.025 L

Molarity of HN₃ = 0.150 M

number of moles of HN₃ = 0.025 × 0.150

number of moles of HN₃ =  0.00375  mol

Molarity of NaOH = 0.150 M

the volume of NaOH = 13.3 mL = 0.0133

number of moles of NaOH = 0.0133× 0.150

number of moles of NaOH = 0.001995 mol

The chemical equation for the reaction of this process can be written as:

HN_3 + OH- ---> N^-_{3} + H_2O

1 mole of hydrazoic acid react with 1 mole of hydroxide to give nitride ion and water

thus the new number of moles of HN₃ = 0.00375 - 0.001995 = 0.001755 mol

Total volume used in the reaction =  0.025 +  0.0133 = 0.0383  L

Concentration of HN_3 = \dfrac{0.001755}{0.0383} = 0.0458 M

Concentration of N^{-}_3 = \dfrac{ 0.001995 }{0.0383} = 0.0521 M

GIven that :

Ka = 1.9 x 10^{-5}

Thus; it's pKa = 4.72

pH =4.72 +  log(\dfrac{ \ 0.0521}{0.0458})

pH =4.72 + log(1.1376)

pH =4.72 + 0.05598

pH =4.77598

pH ≅ 4.80

3 0
3 years ago
What volume of silver metal will weigh exactly 2500.0g. The density of the silver is 10.5 g/cm3
pochemuha
Density = mass/volume
From this equation we can also say:
Volume = mass/density
V = 2500.0g/10.5g/cm3
V = 238 cm3
6 0
3 years ago
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