1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alika [10]
3 years ago
13

A sample of iron has a mass of 46.8 grams and a volume of 6 cm3. what is the density of iron?

Chemistry
2 answers:
Dovator [93]3 years ago
6 0
7.8 g/cm3 because Mass/Volume=Density
eduard3 years ago
5 0

Answer:

7.8 g/cm^{3}

Explanation:

Density, denoted by the greek symbol rho (ρ),  is the mass per unit of volume and it is also called specific mass. For a pure substance, density has the same value as the mass concentration.

The equation to calculate the density is as follows:

ρ= \frac{m}{v} =\frac{mass}{volume}

Replacing the mass and volume given in the statement, we optain:

ρ=\frac{46.8 g}{6cm^{3} } =7.8\frac{g}{cm^{3} }

Obtaining a similar value to that of the theoretical density of iron, wich is 7.874 g/cm^{3}

You might be interested in
A solution is prepared by mixing 25.0 g H2O and 25.0 g C2H5OH. Determine the mole fractions of each substance.
Veronika [31]

Answer:

Mole fraction H₂O → 0.72

Mole fraction C₂H₅OH → 0.28

Explanation:

By the mass of the two elements in the solution, we determine the moles of each:

25 g . 1 mol/ 18g = 1.39 moles of water (solute)

25 g . 1 mol / 46 g = 0.543 moles of ethanol (solvent)

Mole fraction solute = Moles of solute / Total moles

Mole fraction solvent = Moles of solvent / Total moles

Total moles = Moles of solute + Moles of solvent

1.39 moles of solute + 0.543 moles of solvent = 1.933 moles → Total moles

Mole fraction H₂O = 1.39 / 1.933 → 0.72

Mole fraction C₂H₅OH= 0.543 / 1.933 → 0.28

Remember that sum of mole fractions = 1

8 0
3 years ago
Read 2 more answers
Two substances are combined and react. After 10 minutes, the chemical reaction has reached equilibrium. Which values would be eq
galina1969 [7]

The extra conversion of concentration of reactant and product should be zero in order to attaining equlibrium state.

<h3>What is equilibrium?</h3>

Chemical equilibrium refers to the state in which both the reactants and products are present in equal concentrations or amount. In equlibrium, same amount of reactant is converted into product and product into reactant.

So we can conclude that the extra conversion of concentration of reactant and product should be zero in order to attaining equlibrium state.

Learn more about equilibrium here: brainly.com/question/517289

7 0
2 years ago
Write an 250 words about Water Purification and Filtration
kotykmax [81]

Answer:

Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids and gases from contaminated water. The goal is to produce water fit for a specific purpose. Most water is purified for human consumption (drinking water), but water purification may also be designed for a variety of other purposes, including meeting the requirements of medical, pharmacological, chemical and industrial applications. In general the methods used include physical processes such as filtration,sedimentation, and distillation, biological processes such as slow sand filters or biologically active carbon, chemical processes such asflocculation and chlorination and the use of electromagnetic radiation such as ultraviolet light.

Extreme lack or loss of water may lead to dehydration of the body and other health complications. For this reason, governments ensure that citizens have access to clean and safe water for domestic use. Clean water is essential in ensuring that no pathogens or impurities are ingested by people, either through direct drinking or through food.

To attain these standards of water, purification is important. Water purification involves physical and chemical processes, which are carried out stepwise to ensure the water is safe and free from any harm. This directional process essay synthesizes the steps, which have to be followed to achieve this task.

In essence, water purification denotes the process used to free water from impurities like bacteria and contaminants. Since the process is aimed at eliminating all the impurities present in the water, it is necessary to apply chemical and physical methods of separation in an orderly manner.

Explanation:

6 0
2 years ago
Freezing and thawing water can cause a rock to break down into smaller pieces. Which part of the rock cycle is this an example o
zloy xaker [14]

Answer:

Deposition

Explanation:

It’s breaking down the rock :]

4 0
3 years ago
Read 2 more answers
In animals. energy is produced by the:
CaHeK987 [17]
It’s c mitochondria
5 0
2 years ago
Other questions:
  • (5points) Na2[Fe(OH2)2(OH)I3]absorbs photons with energy of 191kJ/mol. Calculate the wavelength (in nm) for a photon absorbed by
    7·1 answer
  • Which of the following is true regarding activation energy
    13·1 answer
  • The heat transfer depicted in the image is MOST likely
    13·2 answers
  • Enter the electron configuration for the ion most likely formed by phosphorus. Express your answer in the order of orbital filli
    6·1 answer
  • Read the speedometer and report the speed to the proper
    8·1 answer
  • How many moles of KCl are in <br> 28g of KCl?
    5·2 answers
  • An experiment shows that 113 mL gas sample at pressure of 721mmHg changed to 901 mmHg.
    8·1 answer
  • Calculate the mass in grams of carbon dioxide produced from 11.2 g of octane (C8H18) in the reaction above.
    14·1 answer
  • Negative radical in the periodic table<br>​
    13·1 answer
  • What is the volume of 3.5 moles of chlorine gas at standard temperature and pressure (STP)? (3 points)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!