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
Sloan [31]
3 years ago
14

Part 1: What is a black dwarf? Part 2: What is the fate of Sol?

Chemistry
1 answer:
irinina [24]3 years ago
5 0
Part 1 : a black dwarf is a theoretical stellar remnant part: 2 idk
You might be interested in
How<br>many<br>atoms are<br>present<br>in one mole of Ca [OH)2​
Fiesta28 [93]
6.02 times 10 to the 23rd power
8 0
3 years ago
Help it is due tomorrow ​
Anon25 [30]

Answer:

2 H atoms

1 Mg

5 total atoms

Explanation:

4 0
3 years ago
Read 2 more answers
What are elements in the tall columns of the periodic table called?
mihalych1998 [28]
They are called representative elements. 
6 0
3 years ago
Read 2 more answers
Calculate the number of Cl atoms that are in 1.1 x 10^-21 moles of Cl atoms.
Margarita [4]

According to Avogadro's number there are 62.53 atoms of chlorine in 1.1x 10^-21 moles of Cl atoms.

<h3>What is Avogadro's number?</h3>

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number or number of moles×Avogadro's number.

ON substitution in above formula number of atoms=1.1×10²¹×6.023×10²³=62.53 atoms

Thus, there are 62.53 chlorine  atoms in 1.1x 10^-21 moles of Cl atoms.

Learn more about Avogadro's number,here:

brainly.com/question/11907018

#SPJ1

6 0
1 year ago
The following data were measured for the reaction BF3(g)+NH3(g)→F3BNH3(g): Experiment [BF3](M) [NH3](M) Initial Rate (M/s) 1 0.2
Rama09 [41]

Answer:

-r_{A}=k\times[BF_3]^{1}\times[NH_3]^{1}

Explanation:

The rate law of a chemical reaction is given by

-r_{A}=k\times[BF_3]^{\alpha}\times[NH_3]^{\beta}

This law can be written for any experiment, and making the quotient between those expressions the reaction orders can be found

Between experiments 1 and 2  

\frac{-r_{A1}}{{-r}_{A2}}=\left(\frac{\left[NH_3\right]_1}{\left[NH_3\right]_2}\right)^\beta

Then the expression for the calculation of \beta

\beta=\frac{ln\frac{-r_{A1}}{-r_{A2}}}{ln\left(\frac{\left[NH_3\right]_1}{\left[NH_3\right]_2}\right)}=\frac{ln\frac{0.2130}{0.1065}}{ln\left(\frac{0.250}{0.125}\right)}

Resolving  

\beta=1

Doing the same between experiments 3 and 4 the expression for \alpha is

\alpha=\frac{ln\frac{-r_{A3}}{-r_{A4}}}{ln\left(\frac{\left[BF_3\right]_3}{\left[BF_3\right]_4}\right)}=\frac{ln\frac{0.0682}{0.1193}}{ln\left(\frac{0.200}{0.350}\right)}

Resolving  

\alpha=1

This means that the rate law for this reaction is  

-r_{A}=k\times[BF_3]^{1}\times[NH_3]^{1}

5 0
3 years ago
Other questions:
  • How many grams of H3PO4 are produced when 10.0 moles of water react with an excess of P4O10?
    6·1 answer
  • PLEASEEE HELP!!
    13·1 answer
  • Which pair shares the same empirical formula?plz help!
    9·2 answers
  • Charles's law describes the relationship of the volume and temperature of
    6·1 answer
  • An ideal gas has a pressure of 2.5 atm, a volume of 1.0 L at a temperature of 30°C. How many molecules are there in this gas? (R
    6·1 answer
  • Need help with matching the pictures with biomes
    10·2 answers
  • When you throw a rock, you are ________ energy.
    7·1 answer
  • The definition of a chemical change is when two or more substances (molecules) combine to form a new substance (or new molecules
    9·2 answers
  • 2 C4H10+13 O2 = 8 CO2+10 H2O
    13·1 answer
  • A gas cylinder contains exactly 1 mole of oxygen gas (O2). How many molecules of oxygen are in the cylinder? 4. 01 × 1022 molecu
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!