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
shtirl [24]
4 years ago
14

Why can Sirius be seen in the night sky? Thank you who ever answers

Chemistry
1 answer:
ra1l [238]4 years ago
7 0

Answer:

Because the star has a higher luminosity/intrinsic brightness than other stars.

You might be interested in
If you are administering an oral acetaminophen dose of 320. mg from a bottle at a concentration of 32.0 mg/ml , how many millili
aliina [53]
The  number  of  milliliters of  the   solution  that you  need  to  give  to  the  patient  is  calculated  as  follows

32mg  is in  1  ml  of  the  solution
what  about 320mg
 =( 320mg  x 1 ml) /32mg=  10ml
4 0
4 years ago
Calculate the molarity of sodium chloride in a half-normal saline solution (0.45% NaCl). The molar mass of NaCl
Cerrena [4.2K]

Answer:

0.077 M

Explanation:

Molarity is the representation of the solution.

Molarity:

It is amount of solute in moles per liter of solution and represented by M

Formula used for Molarity

                    M = moles of solute / Liter of solution . . . . . . . . . . (1)

Data Given :

The concentration of half normal (NaCl) saline = 0.45g / 100 g

So,

Volume of Solution =  100 g = 100 mL

Volume of Solution in L =  100 mL / 1000

Volume of Solution =  0.1 L

molar mass of NaCl = 58.44 g/mol

Now to find number of moles of Nacl

               no. of moles of NaCl = mass of NaCl / molar mass

               no. of moles of NaCl =  0.45g / 58.44 g/mol

               no. of moles of NaCl =  0.0077 g

Put values in the eq (1)

                  M = moles of solute / Liter of solution . . . . . . . . . . (1)

                  M = 0.0077 g / 0.1 L

                  M = 0.077 M

So the molarity of half-normal saline solution (0.45% NaCl) = 0.077 M

3 0
3 years ago
Consider the Lewis structure for glycine, the simplest amino acid: (a) What are the approximate bond angles about each of the tw
UkoKoshka [18]

Each carbon is tetrahedrally planar and has three sections, making all bond angles in (a) 120°.(b) hybridization with sp2.(c) If a double bond is present in the compounds, one of the bonds is a sigma connection and the other a pi bond.

<h3>What is an example of an amino acid?</h3>

A basic amino group (NH2), a carboxyl group group (COOH), and an organic Aromatic rings that really is specific to each amino acid make up an amino acid, an organic molecule.

<h3>Which five amino acids are there?</h3>

You must obtain the nine essential amino acids cytochrome c, isoleucine, hcl, lysine, methionine, phenylalanine, alanine, tryptophan, and valine through your food.They are essential for several bodily processes, such as protein biosynthesis, tissue regeneration, and nutrient uptake.

To know more about Lewis structure visit:

brainly.com/question/20300458

#SPJ4

6 0
1 year ago
How does the energy of an electron change when the electron moves closer to the nucleus?
makkiz [27]
The energy of the electron reduces as it moves closers to the nucleus. This is because it moves from a higher energy orbital to a one of lower energy. It does this by releasing a photon with the energy difference of the current energy level, and the energy level it drops too.
6 0
3 years ago
Read 2 more answers
Ellie started her reaction between the KMnO4 and malonic acid by first heating the two solutions in the hot water bath. She then
sergij07 [2.7K]

Answer:

The time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed

Explanation:

A chemical reaction is "a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction" (Oxford dictionary).

A chemical reaction begins immediately the reactants are mixed together in a reaction vessel because the particles of the reactants immediately begin to collide with each other. There is no lost time before reactions begins!

This implies that, the time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed.

5 0
3 years ago
Other questions:
  • a movable chamber has a volume of 18.5 L (at temperature of 18.5 C) assuming no gas escapes and the pressure remains constant wh
    6·1 answer
  • Which of the subatomic particles is responsible for the chemical behavior of a given atom?
    6·1 answer
  • Help(Must be done by 2/22/2018)
    8·1 answer
  • What does a particular point on a line of a phase diagram represent ?
    9·2 answers
  • Which element begins with the ketter K?
    8·1 answer
  • A mixture initially contains A, B, and C in the following concentrations: [A] = 0.650 M, [B] = 1.35 M, and [C] = 0.300 M. The fo
    13·1 answer
  • What is the freezing point of a solution prepared from 45.0 g ethylene glycol (C2H6O2) and 85.0 g H2O? Kf of water is 1.86°C/m.
    9·1 answer
  • When Barium chloride is formed, what questions will the student need to know prior to making the formula???
    7·1 answer
  • Write the uses of hydrogen gas?​
    8·2 answers
  • What is the difference between a stingray and a manta ray.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!