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4 years ago

Which of the following elements is found in the p sublevel?

Chemistry

1 answer:

Anna007 [38]4 years ago

7 0

Answer:

glass coal and iron to get a dimon sword

Explanation:

u mine iron and thaen get diamonds ro get the sword

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The acidic substance in vinegar is acetic acid, HC2H3O2. When 4.00 g of a certain vinegar sample was titrated with 0.200 M NaOH,

mihalych1998 [28]

Answer:

7.7%

Explanation:

the balanced equation for the neutralization reaction is:

CH3COOH+NaOH→CH3COONa+H2O

from the balanced equation above,the mole ratio of CH3COOH to NaOH is 1:1

no of mole of CH3COOH= no of mole of NaOH

no of mole of NaOH= concentration(M) × Volume(L)

=0.2 M× 0.02556=0.005112 mol

since, no of mole of CH3COOH= no of mole of NaOH

no of mole of CH3COOH=0.005112 mol

However ,no of mole =mass/molar mass

molar mass of CH3COOH=60.052g/mol

mass of CH3COOH=0.005112×60.052

=0.307g

percentage by mass of acetic acid in the vinegar=0.307/4

=0.07675×100%

=7.675%

5 0

4 years ago

How is an endothermic reaction identified?

Fynjy0 [20]

D- It requires heat as a reactant

6 0

3 years ago

Read 2 more answers

The invention of the ____ allows scientists to learn about cells.

zavuch27 [327]

The Microscope allowed scientists to learn about cells.

6 0

3 years ago

Consider the following balanced equation for the following reaction:

Sidana [21]

Answer: The actual yield of the carbon dioxide is 47.48 grams

Explanation:

For the given balanced equation:

$15O_2(g)+2C_6H_5COOH(aq.)\rightarrow 14CO_2(g)+6H_2O(l)$

To calculate the mass for given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Theoretical moles of carbon dioxide = 1.30 moles

Molar mass of carbon dioxide = 44 g/mol

Putting values in above equation, we get:

$1.30mol=\frac{\text{Theoretical yield of carbon dioxide}}{44g/mol}\\\\\text{Theoretical yield of carbon dioxide}=(1.30mol\times 44g/mol)=57.2g$

To calculate the theoretical yield of carbon dioxide, we use the equation:

$\%\text{ yield}=\frac{\text{Actual yield}}{\text{Theoretical yield}}\times 100$

Theoretical yield of carbon dioxide = 57.2 g

Percentage yield of carbon dioxide = 83.0 %

Putting values in above equation, we get:

$83=\frac{\text{Actual yield of carbon dioxide}}{57.2}\times 100\\\\\text{Actual yield of carbon dioxide}=\frac{57.2\times 83}{100}=47.48g$

Hence, the actual yield of the carbon dioxide is 47.48 grams

7 0

3 years ago

If 27.50 mL of 0.120 M NaOH neutralizes 0.248 g of HAA, what is the molar mass of unknown amino acid

tino4ka555 [31]

Answer:

75.15 g/mol

Explanation:

First, let us look at the equation of reaction;

$NaOH + HAA --> NaAA + H_2O$

From the balanced equation of reaction, 1 mole of NaOH is required to completely neutralize 1 mole of HAA.

Recall that: mole = molarity x volume.

Therefore, 27.50 mL, 0.120 M NaOH = 0.0275 x 0.120 = 0.0033 moles

0.0033 mole of NaOH will therefore requires 0.0033 moles of HAA for complete neutralization.

In order to find the molar mass of the unknown amino acid, recall that:

mole = mass/molar mass, hence, molar mass = mass/mole.

Therefore, molar mass of HAA = 0.248/0.0033 = 75.15 g/mol

6 0

3 years ago