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
Aloiza [94]
3 years ago
15

What is your calculated density of water at R.T.?

Chemistry
1 answer:
Alekssandra [29.7K]3 years ago
3 0
The mass of 40 mL of water is 40 grams. Since D = m/v and mL = cm3, the density of water is 1 g/cm3. Choose a volume between 1 and 100 mL. Use your graph to find the mass.
You might be interested in
A 3.140 molal solution of NaCl is prepared. How many grams of NaCl are present in a sample containing 2.692 kg of water
S_A_V [24]

Answer:

494.49 g of NaCl.

Explanation:

Data obtained from the question include the following:

Molality of NaCl = 3.140 m

Mass of water = 2.692 kg

Mass of NaCl =.?

Next, we shall determine the number of mole of NaCl in the solution.

Molality is simply defined as the mole of solute per unit kilogram of solvent. Mathematically, it is expressed as

Molality = mole of solute /Kg of solvent

With the above formula, we can obtain the number of mole NaCl in the solution as follow:

Molality of NaCl = 3.140 m

Mass of water = 2.692 kg

Mole of NaCl =..?

Molality = mole of solute /Kg of solvent

3.140 = mole of NaCl /2.692

Cross multiply

Mole of NaCl = 3.140 x 2.692

Mole of NaCl = 8.45288 moles

Finally, we shall covert 8.45288 moles of NaCl to grams. This can be obtained as follow:

Mole of NaCl = 8.45288 moles

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mass of NaCl =.?

Mole = mass /Molar mass

8.45288 = mass of NaCl /58.5

Cross multiply

Mass of NaCl = 8.45288 × 58.5

Mass of NaCl = 494.49 g.

Therefore, 494.49 g of NaCl are present in the solution.

8 0
3 years ago
Explain how the copper could be in the lake sample near the picnic area but not have been detected by this test.
Masja [62]

Answer:

May be the instrument is incorrect or may be error in it.

Explanation:

The copper have not been detected by this test because the test may be not for the detection of copper, may be it is used for identification of another minerals. If there is copper in the lake sample but can't be detected in the test so it means that the instrument which is used for detection is not the right one  or having error in that instrument. Every mineral has a specific type of instrument that detect its presence, if we use incorrect instrument for the mineral then we can't detect the presence of that specific mineral.

8 0
3 years ago
Which parameters can you change to affect the rate of the reaction? in alphabetical order, list all that apply to this system.?
postnew [5]
Catalyst 
Concentration 
Temperature
6 0
3 years ago
How is chemical equilibrium achieved?
just olya [345]

Answer:

Explanation:

Equilibrium is achieved in a chemical reaction when there is a steady state with no change in concentrations.

So the answer is "When the concentrations of reactants and products are constant."

7 0
2 years ago
What is the number of elements for 2C3H5O2
ch4aika [34]

Answer: Total Number of Atoms is Nine.

We have 3 atoms of (C)carbon, 5 atoms of (H)hydrogen and 2 atoms of (O)oxygen. So total is 3+5+2=10

It means there are 10 atoms in the compound and from the formula we come to know that there are 2 molecules . Therefore 2×10=20 atoms.

C3 means there are 3 atoms of carbon in one molecule

3C means just 3 atoms of carbon

3C3 means there are 3 molecules of carbon with 3 carbon atoms in each molecule. So total atoms is 9.

Hope I helped!

7 0
3 years ago
Other questions:
  • n a chemical reaction, water decomposes to form hydrogen and oxygen. What is the correct term for the water? Question 5 options:
    9·1 answer
  • Uranium-236 is ____.
    13·2 answers
  • 2Fe + 3Cl2 → 2FeCl3 which of the following options gives the correct reactant ratio?
    6·1 answer
  • PLEASE HELP ASAP!! Needed IN 10 MINUTES!!
    6·1 answer
  • Which best describes most covalent compounds? A.soft B.brittle C.cold D.warm​
    11·2 answers
  • Heating glucose, a monosaccharide sugar, in the presence of excess oxygen produces carbon dioxide gas and water vapor. Balance t
    15·1 answer
  • A 15.9 g sample of sodium Carbonate is added to a solution of acetic acid weighing 20 g. the 2 substances react, releasing carbo
    14·1 answer
  • 2B + 3H2 2BH3<br> How many moles of BH3 are synthesized when 27.0 moles of H2 completely react?
    15·1 answer
  • Please help!
    5·1 answer
  • A 29.4 ml sample of 0.347 m triethylamine, (c2h5)3n, is titrated with 0.375 m hydrobromic acid. at the equivalence point, the ph
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!