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Alexeev081 [22]
3 years ago
14

By what method do we measure the distance to objects that are a few thousand light-years away?

Chemistry
2 answers:
Zigmanuir [339]3 years ago
8 0

Answer:

i believe the answer to your question is parallax or parsecs. im sorry im not very specific in this!

Explanation:

Wewaii [24]3 years ago
8 0
First, a dirty little secret: scientists don't actually measure astronomical distances in light years. Rather, they measure them in a unit called the Parsecs
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The mass in grams of C in 275 g of C3H6
Furkat [3]

Answer:

Mass of carbon = 236.5 g

Explanation:

Given data:

Mass of C₃H₆ = 275 g

Mass of C = ?

Solution:

Formula:

Mass of carbon =  molar mass of carbon/ molar mass of compound × mass of compound

Molar mass of carbon = 12 g/mol

Molar mass of compound = 42 g/mol

Mass of carbon = 36 g/mol / 42 g/mol × 275 g

Mass of carbon = 0.86 × 275 g

Mass of carbon = 236.5 g

3 0
3 years ago
What information does the fossil record provide?​
lukranit [14]

By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past.

6 0
3 years ago
Wood is mainly cellulose, a polymer produced by plants. One use of wood is as a fuel in campfires, fireplaces, and wood furnaces
Alja [10]

Answer:

C6 H10 O5+ 6O2-----> 6CO2+5H2O+heat

Explanation:

There are 6 carbon atoms in reactants to balance you put coefficient 6.

This makes the oxygen in CO2 12 so to balance put 6 in oxygen in reactants.

There are 10 hydrogen atoms in reactants to balance you put 5 in front of H2O in products.

If u recheck: 6 C atoms in reactants, 6 C atoms in products.

10 H atoms in reactants, 10 H atoms in products.

17 O atoms in reactants, 17 O atoms in products.

6 0
3 years ago
What are some non examples of temperature ?
adoni [48]

Answer:   dixionanon , fairinheat, cabrowskin, and lastly ancomthere

Explanation:

5 0
3 years ago
What is the name of this molecule?<br><br> H3C - C ≡ C - CH3<br><br> Answer: 1,2,3, or 4-butyne?
Semenov [28]

Explanation:

The given molecule is

H3C - C ≡ C - CH3

The numbering order is shown below:

H3C - C ≡ C - CH3

    1     2     3     4

So, the alkyne group is in the second position.

The carbon chain has four carbons.

Hence, the IUPAC name of the given compound is:

2-butyne.

8 0
3 years ago
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