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
Alik [6]
3 years ago
8

The product of the measurements 2.05 cm x 32 cm should be rounded to

Chemistry
1 answer:
Bas_tet [7]3 years ago
7 0

Answer:

Two significant figures

Step-by-step explanation:

In <em>multiplication </em>problems, your answer can have no more significant figures than the number with the <em>fewest significant figures</em>.

2.05 cm × 32 cm = 65.600 000 00 cm² (by my calculator)

There are three significant figures in 2.05, but only two in 32.

You must round to <em>two</em> significant figures and report the answer as 66 cm².

65.600 000 00 cm² ⟶ 66 cm²  

You might be interested in
which industrial city would have fewer air pollution incidents related to temperature inversions one on the great plains or one
egoroff_w [7]
I'm not positive, but I believe it would be one near the Rocky Mountains.
3 0
3 years ago
How many joules of heat are required to raise the temperature of 174g of gold from 22°C to 85°C? The specific heat of gold is 0.
Slav-nsk [51]
Remembering the equation Q=MCdeltaT where
q=is the amount of heat energy
M=mass
C=specific heat
deltaT= change in temperature

Therefore, using the equation we can substitute values and solve for q.
Q= (15 grams) (0.129 J/(gx°C))(85-22)
Q=(15) ((0.129 J/(gx°C)) (63)
Q=121.9 Joules

The energy needed to raise the temperature of 15 grams of gold from 22 degrees Celsius to 85 degrees Celsius is then 121.9 Joules or 122 Joules (if rounded up).

7 0
3 years ago
What is the defonishon of a crystalline structure?
pogonyaev
The arrangement in space and the interatomic distances and angles of the atoms in crystals, usually determined by x-ray diffraction measurements
7 0
3 years ago
Write equations for the initiation and propagation steps for the formation of dichloromethane by free radical
olya-2409 [2.1K]
 <span>Name of type of mechanism </span>initiation step<span> first </span>propagation step<span> second </span>propagation step<span>(ii) </span>write<span> an overall </span>equation<span> for the </span>formation of dichloromethane<span> from ... Best Answer: i) This is a </span>free-radical<span> substitution mechanism.</span>
7 0
3 years ago
(20 Points) Which definition of "coarse" matches its use in the phrase "coarse focus?"
vlada-n [284]

Answer by YourHope:


Hi! :)


Which definition of "coarse" matches its use in the phrase "coarse focus?"


A) "rough in texture"


Have a BEAUTIFUL day~

7 0
3 years ago
Read 2 more answers
Other questions:
  • #1: What is the charge on an electrically neutral atom of hydrogen?
    15·2 answers
  • How do you know which element is the most reactive in the periodic table?
    5·1 answer
  • How many electrons are there in the only energy level of helium, a noble gas? * Two Three Six Eight​
    9·1 answer
  • The properties of several unknown solids were measured. Solid Melting point Other properties A &gt;1000 °C does not conduct elec
    14·2 answers
  • Which of the following choices represents a balanced chemical equation? A. Ca3(PO4)2 + 6SiO2 → P4O10 + 3CaSiO3 B. 2Ca3(PO4)2 + 6
    10·1 answer
  • Please help me ill give you 9 points for your help
    9·2 answers
  • Which one of these three elements conatain the most protons
    8·2 answers
  • 6. The substance whose Lewis structure shows triple covalent bonds is
    7·1 answer
  • A sample of Kr gas is observed to effuse through a pourous barrier in 8.15 minutes. Under the same conditions, the same number o
    13·1 answer
  • If an ion has a -2 charge, how many extra electrons do you add to the lewis structure
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!