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igomit [66]
3 years ago
12

Directions: Fill in the blanks to complete the idea. 1. Constellations are group of that form pattems in the night sky 2. Ursa M

ajor, Cassiopeia, and Orion are some common 3. Stars are used to tell and time, predict weather, and to serve as birth sign
PASAGOT PO NG MAAYOS
KAILANGAN LANG PO
BRAINLIEST+FOLLOW+HEART+POINT
BAD ANSWER-REPORT
​

Chemistry
1 answer:
siniylev [52]3 years ago
8 0

1. Constellations are group of <u>stars</u> that form pattems in the night sky

2. Ursa Major, Cassiopeia, and Orion are some common <u>constellations</u><u>.</u>

3. Stars are used to tell <u>directions</u> and time, predict weather, and to serve as birth sign.

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How might a collision between Neptune and Halley's Comet<br> affect Neptune's orbit?
AveGali [126]

Answer:

It will mess up the orbit around the sun

Explanation:

5 0
3 years ago
Identify the information that can be included in a chemical equation. Check all of the boxes that apply. how long the reaction t
Soloha48 [4]

the states of the reactants and products

the temperature and pressure at which the reaction was carried out

the relative amounts of reactants and products

the type of catalyst that is used to speed up the reaction

whether the reaction can go in both directions

Explanation:

A chemical equation is an equation that shows how the reactants are combining together to give the products.

The following are the information to include when writing a chemical equation;

  • the states of the reactants and products

whether solid, liquid or gases or aqueous, It is usually appended as a subscript in bracket

  • the temperature and pressure at which the reaction was carried out

  this shows the condition under which the reaction was carried out. It also gives useful information that can be used to quantitatively determine heat changes in a reaction.

  • the relative amounts of reactants and products

this is usually derived from the balanced equation. They are the numbers appended at the beginning of the species in the equation

  • the type of catalyst that is used to speed up the reaction

 it is a good practices to provide the information about the catalyst used.

  • whether the reaction can go in both directions

→ signifies one direction

⇔ both directions

learn more:

Chemical equation brainly.com/question/2924195

#learnwithBrainly

6 0
4 years ago
Read 2 more answers
Calculate the mass percent composition of sulfur in Al2(SO4)3. Calculate the mass percent composition of sulfur in Al2(SO4)3. 28
ludmilkaskok [199]

Answer:

The mass percent of sulfur is 28.12% (option 1)

Explanation:

Step 1: Data given

Atomic mass of Al = 26.98 g/mol

Atomic mass of S = 32.065 g/mol

Atomic mass of O = 16.0 g/mol

Step 2: Calculate the molar mass of Al2(SO4)3

In 1 molecule Al2(SO4)3 we have 2 Aluminium atom, 3 Sulfur atoms and 12 oxygen atoms

Molar mass of Al2(SO4)3 = 2*26.98 + 3*32.065 + 12*16 .0

Molar mass of Al2(SO4)3 = 342.155 g/mol

Step 3: Calculate the mass percent of sulfur

In 1 molecule Al2(SO4)3 we have 2 Aluminium atom, 3 Sulfur atoms and 12 oxygen atoms

Mass % sulfur = (3*atomic mass of S/ molar mass of Al2(SO4)3) * 100 %

Mass % sulfur = (3*32.065 / 342.155) * 100%

Mass % sulfur = 28.12 %

The mass percent of sulfur is 28.12% (option 1)

3 0
4 years ago
If you stacked Avogadro's number of pennies one on top of the other on Earth's surface, how far would the stack extend (in kilom
Mashutka [201]

A penny is described as a coin having thickness of about 0.019 m as follows:

Thickness of a penny = 0.019 m

Number of pennies stacked is equivalent to Avogadro number = 6.02 * 10^23 penny

Distance convered by number of pennies = 6.02 * 10^23 * 0.019 = 1.14 * 10^19 Km

Thus the stack of pennies extended upto 1.14 * 10^19 Km

5 0
4 years ago
What must be true of the net charge for any sample of sodium chloride
Ede4ka [16]

Answer:

Zero (0)

Explanation:

Since Na^+ has a charge of +1 and Cl^- has a charge of —1 in NaCl

Then the net = +1 —1 = 0

4 0
4 years ago
Read 2 more answers
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