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
masha68 [24]
3 years ago
6

The brightness of a star depends on its _____ a. color b. composition of atmosphere c. distance from Earth, and stars that are c

loser look _____ a. brighter b. dimmer c. white
Chemistry
1 answer:
Yanka [14]3 years ago
5 0

Answer:

Either B or C. Composition or the Distance from the Earth.

You might be interested in
Is frying an egg chemical or physical change
max2010maxim [7]

It is a chemical change

3 0
3 years ago
Read 2 more answers
How many grams of carbonic acid were produced by the 3.00 g sample of NaHCO
stellarik [79]
I think the given is 3 g sample of NaHCO3. then if it will be reacted with an acid, it will produce H2CO3.
 so the reaction NaHCO3 + HCl --> NaCl + H2CO3

mas of H2CO3 = 3 g NaHCO3 ( 1 mol NaHCO3 / 84 g ) ( 1 mol H2CO3 / 1 mol NaHCO3) ( 62.03 g / 1 mol )
mass of H2CO3 = 2.22 g H2CO3
7 0
3 years ago
If we start with 8000 atoms of radium-226 how much would remain after 3200 years?
olya-2409 [2.1K]
<h3>Answer:</h3>

2000 atoms

<h3>Explanation:</h3>

We are given the following;

Initial number of atoms of radium-226 as 8000 atoms

Time taken for the decay 3200 years

We are required to determine the number of atoms that will remain after 3200 years.

We need to know the half life of Radium

  • Half life is the time taken by a radio active material to decay by half of its initial amount.
  • Half life of Radium-226 is 1600 years
  • Therefore, using the formula;

Remaining amount = Original amount × 0.5^n

where n is the number of half lives

n = 3200 years ÷ 1600 years

 = 2

Therefore;

Remaining amount = 8000 atoms × 0.5^2

                                = 8000 × 0.25

                                 = 2000 atoms

Thus, the number of radium-226 that will remain after 3200 years is 2000 atoms.

6 0
3 years ago
A sample of gas at 47C and 1.5 pressure occupies a volume of 2.20L. What volume would this gas occupy at 107C and 2.5 pressure?
Brums [2.3K]

Answer:

Explanation:

21

8 0
3 years ago
Problem Page Combustion of hydrocarbons such as pentane ( C5 H12 ) produces carbon dioxide, a "greenhouse gas." Greenhouse gases
agasfer [191]
Auuuuuhhhhhhh auhhh Frog
4 0
3 years ago
Other questions:
  • Help plz i don't know this
    8·1 answer
  • How many lone pairs of electrons are on the central carbon atom in a Lewis Structure of CHI3?
    8·1 answer
  • A _____ speeds up a chemical reaction, but is not directly involved in the reaction.
    12·2 answers
  • ASAP<br>what is an electron cloud ​
    15·1 answer
  • Wetlands provide habitats for many living things because of their sheltered waters and what other feature?
    8·1 answer
  • Geologically, the Himalayan mountain range is one of the youngest mountain ranges on Earth. It has nine of the ten highest peaks
    6·2 answers
  • How many Cl- bond with one Na+ ion?
    10·1 answer
  • What is the percent of Heterozygous rabbits
    12·2 answers
  • Which particle diagram represents a mixture of three substances
    14·1 answer
  • A 250 ml sample of saturated a g o h solution was titrated with h c l , and the endpoint was reached after 2. 60 ml of 0. 0136 m
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!