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
Nastasia [14]
2 years ago
12

Round each number to four significant figures

Chemistry
1 answer:
ira [324]2 years ago
5 0

Answer:

a.

84,791 » 8479

b.

256.75 » 256.8

c.

431,801 » 4318

d.

0.00078100 » 0.0007810

Explanation:

.

You might be interested in
What is the effect of tap water, sea water, and rainwater on the rusting rate of iron?
UkoKoshka [18]

Answer:

The more acidic the solution the faster it rusts. More Na = more rust

Explanation:

4 0
2 years ago
You’re going on a plane from Alaska to Florida and you’re taking your bike. It’s the middle of the winter. You fill up your tire
12345 [234]

Answer:

5.52atm

Explanation:

Using the pressure law formula:

P1/T1 = P2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the question, the following information were provided;

P1 = 4.72 atm

P2 = ?

T1 = -3.50°C = -3.50 + 273 = 269.5K

T2 = 42°C = 42 + 273 = 315K

Using P1/T1 = P2/T2

4.72/269.5 = P2/315

CROSS MULTIPLY

4.72 × 315 = 269.5 × P2

1,486.8 = 269.5P2

P2 = 1,486.8 ÷ 269.5

P2 = 5.52atm

8 0
2 years ago
Enter the atomic symbol, including mass number and atomic number, for iodine-125.
ICE Princess25 [194]

Answer:

Explanation:

Iodine - 125

The atomic symbol of iodine is ¹²⁵₅₃ I

The symbol for iodine is I

The atomic number of iodine is 53,

and the atomic mass of iodine is 125 .

<u>The representation of the atomic symbol is as, the atomic mass is written in uppercase and the atomic number is written in lower case , followed by the symbol of the element .</u>

Iodine is a radio active element , used for many biological process .

It is the second largest -lived radioisotope of iodine .

The first is iodine-129 .

3 0
3 years ago
Where does most of the mass of an atom come from?
Sedaia [141]

Where does most of the mass of the universe come from? In ordinary matter, most of the mass is contained in atoms, and the majority of the mass of an atom resides in the nucleus, made of protons and neutrons. Protons and neutrons are each made of three quarks.

7 0
3 years ago
Which one is a true statement about endothermic reactions? a: More heat is given off than is put into the reaction. b :The react
Setler [38]
A because it gets hot
7 0
3 years ago
Other questions:
  • Boston, MA and Barcelona, Spain have very similar latitudes (they are both a similar distance from the equator.) Why is the clim
    8·1 answer
  • Which are always the first waves of an earthquake to be detected
    5·1 answer
  • The wavelength of some yellow light is 580.0 nm. What is the frequency of this yellow light?
    15·2 answers
  • how long would it take to administer exactly 500 mL of fluid through an IV with a drop factor of 30 gtt/mL if the drip rate is 6
    10·1 answer
  • How would you prepare 2-methyl-2-propanol via a grignard with dimethyl carbonate as your carbonyl source? show all reagents?
    9·1 answer
  • A nanotechnology equipment requires 7.40 x 10^18 atoms of potassium. What is the mass of this sample?
    12·1 answer
  • Ravi’s grandmother is suffering from diabetes. Her doctor advised her to take lassi with less fat content. Which of the followin
    13·1 answer
  • Unidad 2 etapa 1 actividades para todos gramatica c page 42
    9·1 answer
  • 8.3 kg, 1.7 Kg/cm3<br> -&gt; ? cm3
    9·1 answer
  • Formula for dicyanoargentate (I) ion​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!