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
tensa zangetsu [6.8K]
3 years ago
9

True or False: When you measure something with a ruler, you should NOT estimate an extra digit. You only need to report the numb

ers you see on the ruler.
Chemistry
1 answer:
sveticcg [70]3 years ago
5 0

Answer:

False

Explanation:

It is important to give exact measurements.

You might be interested in
How much time would it take for 336 mg of copper to be plated at a current of 5.6 A ? Express your answer using two significant
schepotkina [342]

Answer:

1.8 × 10² s

Explanation:

Let's consider the reduction that occurs upon the electroplating of copper.

Cu²⁺(aq) + 2 e⁻ ⇒ Cu(s)

We will establish the following relationships:

  • 1 g = 1,000 mg
  • The molar mass of Cu is 63.55 g/mol
  • When 1 mole of Cu is deposited, 2 moles of electrons circulate.
  • The charge of 1 mole of electrons is 96,486 C (Faraday's constant).
  • 1 A = 1 C/s

The time  that it would take for 336 mg of copper to be plated at a current of 5.6 A is:

336mgCu \times \frac{1gCu}{1,000mgCu} \times \frac{1molCu}{63.55gCu} \times \frac{2mole^{-} }{1molCu} \times \frac{94,486C}{1mole^{-}} \times \frac{1s}{5.6C} = 1.8 \times 10^{2} s

3 0
3 years ago
Which of the following representations shows the correct placement of trophic levels?
OleMash [197]
You have to start listing from the bottom :

3. Secondary Consumers

2. Primary Consumers

1. Producer

4 0
2 years ago
What are some uses of metals?
VashaNatasha [74]
They are used to make plane bodies.
Some are used for electrical wires eg copper because they are good conductors of electricity.
Used in building materials.
used to make jewelry eg gold and silver<span />
4 0
3 years ago
Read 2 more answers
To function on their own, unicellular organisms must do what?
UNO [17]
Well you see unicellular organisms are very unique in the fact that they live all on their own and move around with a flagellum or little motor, but to the point unicellular organisms carry out essentially every function in life and they must in order to simply survive. So it's most likely D.
5 0
3 years ago
Read 2 more answers
the hydrogen atoms are (blank) to one side of the oxygen atom, resulting in a water molecule having a positive charge on the sid
raketka [301]

Answer:

gngbfvgnbgfdzfxc

Explanation:

7 0
2 years ago
Other questions:
  • Which of the following accurately describes a charactic of fungi
    15·1 answer
  • What is the formula for nickel(IV) hydroxide
    7·1 answer
  • What is the ph of a solution of 0.550 m k2hpo4, potassium hydrogen phosphate?
    10·1 answer
  • Compute 6.28×1013+7.30×1011.
    14·1 answer
  • Classify each of these soluble solutes as a strong electrolyte, a weak electrolyte, or a nonelectrolyte. Solutes formula hydroch
    5·1 answer
  • A salt shaker filled with 17.0g sodium chloride contain how many moles?
    8·1 answer
  • The concentration of dye in Solution A is 25.527 M. You have 13 mL of water at your disposal to make the dilutions. The solution
    10·1 answer
  • Which of the data sets qualitative data?
    8·2 answers
  • What is the change in oxidation number of bromine in the following re-dox reaction Cl 2 +2HBr 2HCl+Br 2 A -2;0 B) -1;0 C) 0: -1
    15·1 answer
  • A small sample of methane burns, producing co2 and water vapor. as the hot gas mixture expands, it releases 120.0 kj of heat and
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!