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
babymother [125]
3 years ago
7

How do I round 10.25 to only 3 significant digits

Chemistry
1 answer:
Lady_Fox [76]3 years ago
3 0
10.3 is good the correct rounding of three sig figures

You might be interested in
In Experiment 9, a 1.05 g sample of a mixture of NaCl (MW 58.45) and NaNO2 (MW 69.01) is reacted with excess sulfamic acid. The
Kaylis [27]

Answer:

There is 76.6 mL of nitrogen collected

Explanation:

<u>Step 1: </u>Data given

Mass of the sample = 1. 05 grams

The sample is 40.00% by mass NaNO2

MW of NaCl = 58.45 g/mol

MW of NaNO2 = 69.01 g/mol

Temperature = 22.0 °C

Pressure = 750.0 mmHg = (750/760) atm

The vapor pressure of water at 22.0°C is 19.8 mm Hg = 0.02605 atm

<u>Step 2:</u> Calculate mass of NaNO2

(40/100)*1.05  = 0.42 grams

<u>Step 3:</u> Calculate moles of NaNO2

Moles NaNO2 = 0.42 grams / 69.01 g/mol

Moles NaNO2 = 0.00608 moles

<u>Step 4:</u> Calculate moles of N2

For 2 moles of NaNO2 we'll get 1 mol of N2

For 0.00608 moles of NaNO2 we'll get 0.00608/2 = 0.00304 moles

<u>Step 5:</u> Calculate pressure of N2

P = 750.0 - 19.8 = 730.2 mmHg = (730.2/760)atm = 0.96079 atm = 97352 Pa

<u>Step 6:</u> Calculate volume of N2

PV = nRT

⇒ P = the pressure of N2 =  0.96079

⇒ V = the volume of N2 = TO BE DETERMINED

⇒ n = moles of N2 = 0.00304 moles

⇒ R = the gas constant = 0.08206 L*atm/K*mol

⇒ T = the temperature = 22°C = 295 Kelvin

V = (0.00304*0.08206*295)/0.96079

V = 0.0766 L = 76.6 mL

There is 76.6 mL of nitrogen collected

4 0
3 years ago
According to Bohr atomic model
nata0808 [166]

Answer:

A small positively charged nucleus surrounded by revolving negatively charged electrons in fixed orbits

7 0
3 years ago
What event typically causes upwelling?
WARRIOR [948]

Answer:

Conditions are optimal for upwelling along the coast when winds blow along the shore. Winds blowing across the ocean surface push water away. Water then rises up from beneath the surface to replace the water that was pushed away. This process is known as “upwelling.”

Explanation:

7 0
3 years ago
Rectangular prism has a height of 3cm, a width of 7 cm, and a length of 5 cm. What is it's volume?
goldfiish [28.3K]
Volume= length•width•height

V=5•7•3

V= 105cm^3
6 0
3 years ago
Which of the following affects cell potential?
Slav-nsk [51]

Answer:

the standard cell potential value

Explanation:

For every cell, we can calculate its standard electrode potential from the table of standard electrode potentials listed in many textbooks.

However, from Nernst's equation;

Ecell= E°cell - 0.0592/n log Q

Hence the standard cell potential (E°cell) affects the value of the calculated cell potential Ecell from Nernst's equation as stated above.

3 0
3 years ago
Other questions:
  • Which list of formulas represents compounds, only?
    8·2 answers
  • A concentration cell consists of two sn/sn2+ half-cells. the electrolyte in compartment a is 0.24 m sn(no3)2. the electrolyte in
    6·1 answer
  • Which sample of matter can be seperated into different substances by physical means
    15·1 answer
  • Which element in the third period would you expect to have the larger atomic radius, sodium (Na) or Sulfur (S)?
    11·2 answers
  • How many grams of lithium fluoride is required to make 1.2 L of a 3.5 M<br> solution?
    10·1 answer
  • What does this weather map symbol represent
    12·2 answers
  • What is the pH of a 4.5 x 10 M HI solution?
    5·1 answer
  • Match the number of neutrons to the correct isotope by studying the atomic number and mass number of each isotope. Drag the item
    9·1 answer
  • What lens could get dirty with oil if you move the revolving nosepiece in the wrong direction after viewing under oil immersion?
    12·1 answer
  • The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!