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
Anna007 [38]
3 years ago
13

Convert 863,000,000,000,000 to scientific notation use four significant figures

Chemistry
1 answer:
serg [7]3 years ago
5 0
8.630 x 10^14

U can hav an infinite amount of zeros if they are trailing zeros. We all call them ambiguous.
You might be interested in
The picture below is a great example of __________ biodiversity.
ki77a [65]

Answer:

number three is the answer moderate

4 0
2 years ago
Read 2 more answers
Help please need help need help need help for chemistry
Varvara68 [4.7K]
If you type in the letters (uppercase and lowercase matters) into google it will give you the answers
8 0
3 years ago
The figure above shows the basic concepts of cell division
Cerrena [4.2K]
A. DNA is copied. 
- The cell duplicates its DNA in order to have a complete set in eac cell when it divides.

6 0
3 years ago
In a science lab, a student heats up a chemical from 10 °C to 25 °C which requires thermal energy of 30000 J. If mass of the obj
olganol [36]

Answer:

The specific heat capacity of the object is 50 J/g°C ( option 4 is correct)

Explanation:

Step 1: Data given

Initial temperature = 10.0 °C

Final temperature = 25.0 °C

Energy required = 30000 J

Mass of the object = 40.0 grams

Step 2: Calculate the specific heat capacity of the object

Q = m* c * ΔT

⇒With Q = the heat required = 30000 J

⇒with m = the mass of the object = 40.0 grams

⇒with c = the specific heat capacity of the object = TO BE DETERMINED

⇒with ΔT = The change in temperature = T2 - T2 = 25.0 °C - 10.0°C = 15.0 °C

30000 J = 40.0 g * c * 15.0 °C

c = 30000 J / (40.0 g * 15.0 °C)

c = 50 J/g°C

The specific heat capacity of the object is 50 J/g°C ( option 4 is correct)

3 0
3 years ago
In compliance with conservation of energy, Einstein explained that in the photoelectric effect, the energy of a photon (hv) abso
3241004551 [841]

Answer:

 a) 1.866 × 10 ⁻¹⁹ J      b)   3.685 × 10⁻¹⁹ J

Explanation:

the constants involved are

h ( Planck constant) = 6.626 × 10⁻³⁴ m² kg/s

Me of electron = 9.109 × 10 ⁻³¹ kg

speed of light = 3.0 × 10 ⁸ m/s

a) the Ek ( kinetic energy of the dislodged electron) = 0.5 mu²

Ek = 0.5 × 9.109 × 10⁻³¹ × ( 6.40 × 10⁵ )² = 1.866 × 10 ⁻¹⁹ J

b) Φ ( minimum energy needed to dislodge the electron ) can be calculated by this formula

hv =   Φ + Ek

where Ek = 1.866 × 10 ⁻¹⁹ J

v ( threshold frequency ) = c / λ where c is the speed of light and λ is the wavelength of light = 358.1 nm = 3.581 × 10⁻⁷ m

v = ( 3.0 × 10 ⁸ m/s ) / (3.581 × 10⁻⁷ m ) = 8.378 × 10¹⁴ s⁻¹

hv = 6.626 × 10⁻³⁴ m² kg/s ×  8.378 × 10¹⁴ s⁻¹ = 5.551 × 10⁻¹⁹ J

5.551 × 10⁻¹⁹ J = 1.866 × 10 ⁻¹⁹ J + Φ

Φ = 5.551 × 10⁻¹⁹ J - 1.866 × 10 ⁻¹⁹ J = 3.685 × 10⁻¹⁹ J

7 0
3 years ago
Other questions:
  • Why is hydrogen (H) placed with the elements in Group 1A?
    9·2 answers
  • if Combustion analysis of an unknown compound provides the following data: 98.28 grams of carbon, 16.21 grams hydrogen and 65.52
    11·1 answer
  • What is reactant, atom, product, and molecule
    8·1 answer
  • How does concentration affect boiling point of a solvent?
    12·1 answer
  • What is the pH of a solution that contains a pOH of 7.9?
    10·1 answer
  • Calculate the ΔHrxn for the following
    6·1 answer
  • What is the molarity of a 300.0 mL solution containing 25.0 g of NaCl?
    13·1 answer
  • Help please all please
    7·2 answers
  • What is the mass number of an atom that contains<br><br> 47 protons, 47 electrons, and 62 neutrons?
    15·1 answer
  • What happens to carbon in plants when the plants die.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!