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
boyakko [2]
3 years ago
12

What is the density of an object having a mass of 4.0 g and a volume of 30 mL?

Chemistry
1 answer:
RUDIKE [14]3 years ago
3 0

Answer:

8.324 Hope this helps! =)

You might be interested in
Iron (Fe) is classified as a metal while Silicon (Si) is classified as a metalloid. Which physical property do these two element
sp2606 [1]
I’ll try to get someone to help you I got you bro I’m gonna go find somebody got you
4 0
3 years ago
How many molecules of F2 in 90g F2
Bogdan [553]
I dont know good luck!
7 0
3 years ago
A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scien
pshichka [43]

Answer:

not valid

Explanation:

Expert judgment is a useful validation method to verify the reliability of an investigation that is defined as “an informed opinion of people with experience in the subject, who are recognized by others as qualified experts in it, and who can give information, evidence, judgments and assessments ”

After submitting an instrument for comparison to the consultation and expert opinion, it must meet two quality criteria: validity and reliability. The validity of content is often established based on two situations, one that concerns the design of a test and the other, the validation of an instrument subject to translation and standardization procedures to adapt it to different cultural meanings. It is here that the task of the expert becomes a fundamental task to eliminate irrelevant aspects, incorporate those that are essential and / or modify those that require it.

5 0
4 years ago
For the closed system below: Cu(s) + 2Ag+(aq) 2Ag(s) + Cu2+(aq) How would you know if the system is at equilibrium?
zaharov [31]
For the chemical reactiom to be at equilibrium:
1- The rate of forward reaction must be equal to the rate of the reverse reaction.
2- The mass of EACH element must be equal before and after the reaction (no NET change in mass), otherwise the equilibrium will shift.

Important note: you need to check the mass of each element before and after the reaction (i.e, reactants side and products side) and the not the mass of the system as a whole. This is because the mass of the whole system will be preserved whether the system is at equilibrium or not (this is the fundamental law of mass conservation)
5 0
3 years ago
2.38g of black copper(iii) oxide is completely reduced to by hydrogen to give copper and water. What are the number of atoms of
OleMash [197]

Explanation:

here is the answer bae. Feel free to ask for more

6 0
3 years ago
Other questions:
  • Find degenerate orbitals 3dxy, 2px, 4dz2, 3dyz, 3pz,3dxz, 4sm​
    13·1 answer
  • This one is actually 30 points chem quesitons
    5·1 answer
  • The Ksp of CaF2 is 5.3 mc003-1.jpg 10-9. What is the molar solubility of CaF2 in 0.050 M Ca(NO3)2?
    7·1 answer
  • 1)How can scientists use a seismograph to determine the density and depth of Earth's layers?
    15·1 answer
  • Will nitrogen atoms form bonds with other atoms? why?
    10·1 answer
  • Which of the following is a probable source of Earth’s magnetic field?
    15·2 answers
  • Can someone plz help me with this plz?????
    9·1 answer
  • How much energy is released when 150 grams of water vapor condense at 100°C?
    15·1 answer
  • The molar mass of water (H2O) is 18. 0 g/mol. A sample of water has a mass of 18. 0 g. How many moles of water are contained in
    8·1 answer
  • What is the difference between ethanol and methanol.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!