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
horrorfan [7]
3 years ago
13

2. A 0.45g sample of mineral ore is analyzed for chromium and found to contain

Chemistry
1 answer:
MrRissso [65]3 years ago
6 0

Answer:

Explanation: I don't know

You might be interested in
What is 19 hundred thousandths in scientific notation
Drupady [299]
.00019 

ignore
Too short of an answer /20chars
8 0
3 years ago
Read 2 more answers
A player uses a hockey stick to push a puck at a constant velocity across the ice. The weight of the puck is 1.70 N. The coeffic
Mekhanik [1.2K]
Force = mass × acceleration

static force = coefficient of friction × normal force 
1.70 = 0.0600 × normal force...
normal force = 1.70 ÷ 0.0600.. to obtain.... 
7 0
3 years ago
Read 2 more answers
Which suitable reagent distinguishes ketones and aldehydes from carboxylic acids and on observation, gives a white precipitate??
OLga [1]
How does one determine the identity and structure of an unknown compound? This is not a trivial task. Modern x-ray and spectroscopic techniques have made the job much easier, but for some very complex molecules, identification and structure determination remains a challenge. In addition to spectroscopic information and information obtained from other instrumental methods, chemical reactions can provide useful structural information, and physical properties can contribute significantly to confirming the identity of a compound.
In this experiment, you will be asked to identify an unknown liquid, which will be either an alcohol, aldehyde, or ketone. Identification will be accomplished by carrying out chemical tests, called classification tests, preparing a solid derivative of the unknown and determining its melting point (MP), making careful observations, and analyzing the NMR spectrum of the unknown.
OO
3 0
2 years ago
Read 2 more answers
At a certain temperature and pressure, one liter of CO2 gas weighs 1.95 g.
AysviL [449]

Answer:

1.332 g.

Explanation:

  • We can use the general law of ideal gas: <em>PV = nRT.</em>

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

  • At the same T and P and constant V (1.0 L), different gases have the same no. of moles (n):

<em>∴ (n) of CO₂ = (n) of C₂H₆</em>

<em></em>

∵ n = mass/molar mass

<em>∴ (mass/molar mass) of CO₂ = (mass/molar mass) of C₂H₆</em>

mass of CO₂ = 1.95 g, molar mass of CO₂ = 44.01 g/mol.

mass of C₂H₆ = ??? g, molar mass of C₂H₆ = 30.07 g/mol.

<em>∴ mass of C₂H₆ = [(mass/molar mass) of CO₂]*(molar mass) of C₂H₆</em> = [(1.95 g / 44.01 g/mol)] * (30.07 g/mol) =<em> 1.332 g.</em>

<em></em>

7 0
3 years ago
What is specific heat capacity ​
LenaWriter [7]

Answer:

<u>A</u>

Explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • Which of the following correctly identifies active transport? (1 point) Transport proteins move large molecules from areas of lo
    10·2 answers
  • 19 pts - How do you determine if something is isoelectronic?
    12·1 answer
  • A solution in which the pH is 1.6 would be described as
    7·1 answer
  • What happens when the threat of exposure to dirty air is reduced in a community?
    7·2 answers
  • 2) The fill-in statement, "In describing molecular compounds, the empirical
    9·1 answer
  • How are mixtures and solutions different from each other?
    5·1 answer
  • The dimensions of a box are 4.5 cm wide by 5.750 cm long by 1.50 cm tall. What is the volume of the box , taking significant fig
    11·2 answers
  • Compare the alkali metals and alkaline earth metals with respect to (i) Ionization enthalpy (ii) basicity of oxides (iii) solubi
    13·1 answer
  • Which items below are properties of matter? [select all that apply]
    13·1 answer
  • How many grams of glucose (C6H12O6) are contained in 555 mL of a 1.77 M glucose solution?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!