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3 years ago

Which structure vibrates the hammer? stirrup ear canal eardrum anvil

1 answer:

5 0

ANSWER: Eardrum

EXPLANATION:

The vibrations from the eardrum set the ossicles into motion. The ossicles are actually tiny bones — the smallest in the human body. The three bones are named after their shapes: the malleus (hammer), incus (anvil) and stapes (stirrup). The ossicles further amplify the sound.

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Determine the empirical formula for a compound that contains 48.6%C, 8.2% H, and 43.2% S by mass.

vagabundo [1.1K]

The empirical formula for a compound that contains 48.6%C, 8.2% H, and 43.2% S by mass is $C_3H_6S$ .

<h3>What is the empirical formula?</h3>

An empirical formula tells us the relative ratios of different atoms in a compound.

We need to calculate the number of moles

Number of a mole of carbon =

48.6 g X ( $\frac{1 mole }{ 12.0107 g}$ ) =4.05 mole

Number of a mole of hydrogen =

8.2g X ( $\frac{1 mole}{.00784g}$ ) =8.14 mole

Number of moles of sulphur =

43.2g X ( $\frac{ mole}{32.065g}$ ) = 1.35 mole

Dividing each mole using the smallest number that is divided by 1.35 moles.

Carbon= $\frac{4.05 mole }{1.35 mole}$ =3

Oxygen= $\frac{8.14 mole}{1.35 mole}$ =6

Sulfur= $\frac{1.35 mole}{1.35 mole}$ =1

Empirical formula is $C_3H_6S$

Learn more about empirical formula here:

brainly.com/question/14044066

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4 0

2 years ago

Ima 5% glucose solution, how many grams of glucose would be present per 100mL

Sedaia [141]

Percentage Weight-in-volume is defined as the number of grams of a solute in a 100 ml (milliliters) solution.

Percentage Weight-in-volume can tell us about the degree of concentration of a given solution.

The solute can be crystalline or non-crystalline in nature.

The number of grams of glucose present in a 5% glucose solution is 5 grams.

This question is based on a Percentage Weight-in-volume. The formula states that:

a% of a glucose solution = a grams of glucose in a 100 mL solution

Hence, 5% glucose solution = 5 grams of glucose / 100 mL solution

Therefore, the number of grams of glucose present in a 5% glucose solution is 5 grams.

To learn more, visit the link below:

brainly.com/question/8482854

6 0

2 years ago

In which solution might a cell maintain homeostasis through diffusion?. . A isotonic. B hypertonic. C hypotonic. D concentrated

Art [367]

A as if the cell is placed in a solution with the same solute and water potential as it no water moves in nor out so the cells remains in homoeostasis

hope that helps

7 0

3 years ago

A chemist prepares a solution of sodium chloride by measuring out 25.4 grams of sodium chloride into a 100. mL volumetric flask

mr_godi [17]

Answer:

The concentration in mol/L = 4.342 mol/L

Explanation:

Given that :

mass of sodium chloride = 25.4 grams

Volume of the volumetric flask = 100 mL

We all know that the molar mass of sodium chloride NaCl = 58.5 g/mol

and number of moles = mass/molar mass

The number of moles of sodium chloride = 25.4 g/58.5 g/mol

The number of moles of sodium chloride = 0.434188 mol

The concentration in mol/L = number of mol/ volume of the solution

The concentration in mol/L = 0.434188 mol/ 100 × 10⁻³ L

The concentration in mol/L = 4.34188 mol/L

The concentration in mol/L = 4.342 mol/L

5 0

3 years ago

An indicator of average kinetic energy is

Paha777 [63]

Answer:

PRESSURE is right answer .

Explanation:

4 0

3 years ago