answer.
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
erik [133]
1 year ago
8

The Sun is a main sequence star. During the last stage of its life cycle, it will become a white dwarf. It will shrink in size,

but it will be very hot. Which of the stars in your chart do you think is a white dwarf and why?
Chemistry
2 answers:
kramer1 year ago
4 0

Answer:

The ones with an absolute magnitude that is more than 5 and have a surface temperature between 25,000 and 7,500.

Barnard's star and  Proxima Centauri because their absolute magnitude is more than 5 and they have a surface temperature of 25,000 7,500.

Explanation: For edmentum users

dangina [55]1 year ago
3 0
The one that is tiny and white. 
You might be interested in
The information below describes a redox reaction.
Alchen [17]

Answer:

3

Explanation:

You have to mutiply the silver reaction by 3 in order to substract the electrons

3 0
1 year ago
Read 2 more answers
Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coeffici
Sveta_85 [38]
2 NH3 + 5F2 = blank N2F4 + 6 HF
8 0
1 year ago
Read 2 more answers
Determine the number of moles in 4.21 x 10^23 molecules of CaCl2
Paha777 [63]
<h3>Answer:</h3>

0.699 mole CaCl₂

<h3>Explanation:</h3>

To get the number of moles we use the Avogadro's number.

Avogadro's number is 6.022 x 10^23.

But, 1 mole of a compound contains  6.022 x 10^23 molecules

In this case;

we are given 4.21 × 10^23 molecules of CaCl₂

Therefore, to get the number of moles

Moles = Number of molecules ÷ Avogadro's constant

          = 4.21 × 10^23 molecules ÷  6.022 x 10^23 molecules/mole

          = 0.699 mole CaCl₂

Hence, the number of moles is 0.699 mole of CaCl₂

7 0
2 years ago
How many grams of N2 gas are present in 1.13 L of gas at 2.09 atm and 291 K?
solong [7]

Answer:

Mass= 2.77g

Explanation:

Applying

P=2.09atm, V= 1.13L, R= 0.082, T= 291K, Mm of N2= 28

PV=nRT

NB

Moles(n) = m/M

PV=m/M×RT

m= PVM/RT

Substitute and Simplify

m= (2.09×1.13×28)/(0.082×291)

m= 2.77g

6 0
2 years ago
A buffer is prepared by mixing hypochlorous acid ( HClO ) and sodium hypochlorite ( NaClO ) . If a strong base, such as NaOH , i
Dafna1 [17]

<u>Answer:</u> The balanced chemical equation is written below.

<u>Explanation:</u>

We are given:

A weak acid that is hypochlorous acid (HClO) and basic salt that is sodium hypochlorite (NaClO)

When a strong base is added to the buffer, the hydroxide ion will be neutralized by hydrogen ions from the acid.

So, the buffer component that neutralizes the additional hydroxide ions in the solution is HClO

The chemical equation for the neutralization of hydroxide ion with acid follows:

HClO+OH^-\rightarrow H_2O+ClO^-

Hence, the balanced chemical equation is written below.

4 0
2 years ago
Other questions:
  • you push a friend sitting on a swing. she has a mass of 50kg and accelerates at a rate of 4 m/s2. find the force you exerted
    14·2 answers
  • Old photographic flashbulbs burn magnesium metal in a reaction that causes a flash of brilliant white light. A photographer woul
    7·2 answers
  • Sort these six events from the earliest to the most recent. Democritus proposes the existence of atoms- Dalton's atomic theory-
    5·1 answer
  • 7. How many moles of argon are there in 20.0 L, at 25 degrees Celsius and 96.8 kPa?
    11·2 answers
  • Which substance absorbs 58.16 kJ of energy when 3.11 mol vaporizes? a)CH4 b)H2S c)CO2 d)NaCl
    9·1 answer
  • The density of air under ordinary conditions at 25°C is 1.19 g/L. How many kilograms of air are in a room that measures 10.0 ft
    9·2 answers
  • Acetylene (C2H2), an important fuel in welding, is produced in the laboratory when calcium carbide (CaC2) reacts with water: CaC
    7·1 answer
  • A 0.1873 g sample of a pure, solid acid, H2X (a diprotic acid) was dissolved in water and titrated with 0.1052 M NaOH solution.
    9·1 answer
  • What explains the observation that FADH2 oxidation yields one less ATP than NADH oxidation by the Electron Transport System
    6·1 answer
  • A drug suspension decomposes by zero-order kinetics with a rate constant of 2 mg mL-1month-1. If the initial concentration is 10
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!