Which branch of chemistry would study how pollution effects marine life?

You wish to prepare 250.0250.0 mL of a 400.0400.0 ppm w/v Fe2+Fe2+ ( MW=55.845 g/molMW=55.845 g/mol ) solution. How many grams o

tresset_1 [31]

Answer:

You need 0.702g of ferrous ammonium sulfate hexahydrate to prepare the desired solution.

Explanation:

First, you want to prepare 250.0mL of a 400.0ppm of Fe²⁺ (That is mg/L, w/v):

0.250L * (400mg / L) = 100mg Fe²⁺ = 0.1g Fe²⁺

Molar mass of Fe is 55.845g. moles are:

0.1g Fe²⁺ * (1mol / 55.845g) =

<h3>1.79x10⁻³ moles Fe²⁺</h3>

The Fe²⁺ comes from ferrous ammonium sulfate hexahydrate, as 1 mole of this salt contains 1 mole of Fe²⁺, moles of the salt you need are:

1.79x10⁻³ moles Fe(NH₄)₂(SO₄)₂.6H₂O.

To convert these moles to grams you must use molar weight, MW, thus:

1.79x10⁻³ moles Fe(NH₄)₂(SO₄)₂.6H₂O * (392.14g / 1mol) =

<h3>You need 0.702g of ferrous ammonium sulfate hexahydrate to prepare the desired solution.</h3>

3 0

3 years ago

The group of atoms that is responsible for the characteristic properties of a family of organic compounds is called a/an _______

Sindrei [870]

The group of atoms that is responsible for the characteristic properties of a family of organic compounds is called a <u>functional</u> group.

Functional groups are groups of one or extra atoms with exclusive chemical homes regardless of what's connected to them. The atoms of practical agencies are certain via covalent bonds with one another and with the relaxation of the molecule.

Functional groups include:

hydroxyl,
methyl,
carbonyl,
carboxyl,
amino, phosphate,
sulfhydryl.

An atom or institution of atoms that replaces hydrogen in a natural compound that defines the shape of a family of compounds and determines the properties of the family.

Learn more about functional groups here brainly.com/question/493841

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6 0

2 years ago

Perform the following calculations to the correct number of significant figures.

SSSSS [86.1K]

Answer: 460.624

Explanation:
1. Multiply the numbers
(24.5260 x 2.56) + 397.84
= (62.784) + 397.84

2. Add the numbers
(62.784) + 397.84
= 460.624

4 0

2 years ago

g n the Ideal Gas Law lab, how is the temperature of the hydrogen gas determined? Select one: The pressure of the gas is determi

Charra [1.4K]

Answer:

The volume of the gas is determined, which will allow you to calculate the temperature.

Explanation:

According to Charles law; the volume of a given mass of an ideal gas is directly proportional to its temperature at constant pressure.

This implies that, when the volume of an ideal gas is measured at constant pressure, the temperature of the ideal gas can be calculated from it according to Charles law.

Hence in the Ideal Gas Law lab, the temperature of an ideal gas is measured by determining the volume of the ideal gas.

4 0

3 years ago

at a certain pressure the density of superficial carbon dioxide is 0.469. what is the mass of a 25.0 mL sample of supercritical

Murrr4er [49]

Answer:

$\large \boxed{\text{11.7 g}}$

Explanation:

$\text{Mass} = \text{25.0 mL} \times \dfrac{\text{0.469 g}}{\text{1 mL}} = \textbf{11.7 g}\\\\\text{The mass of the carbon dioxide is $\large \boxed{\textbf{11.7 g}}$}$

7 0

3 years ago