3 years ago

Why is Orion only seen during part of the year

1 answer:

6 0

Because the orientation of the Earth changes throughout the year, meaning certain stars are only visible at certain times.

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True or false : sound waves travel as particles of matter collide and transfer energy

dimaraw [331]

Answer:

the answer is true

Explanation:

as sound travels through the air it creates a disturbance in the particles of the medium

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3 years ago

which shows as evidence for a scientific claim. A- surveys of public opinion B- company advertisments C-controlled experiments D

Lena [83]

Answer:

You do not know if the advertisement is lying to you. Controlled experiments will be biased and personal websites will say what they think, not following the data & science.

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How many electrons are there in 2 g of H2

KiRa [710]

Answer:

6.02 x 10²³ electrons

Explanation:

Given parameters:

Mass of H₂ = 2g

Unknown:

Number of electrons = ?

Solution:

To find the number of electrons, we must determine the number of moles of H₂ first.

Number of moles = $\frac{mass}{molar mass}$

Molar mass of H₂ = 2(1) = 2g/mol

Number of moles = $\frac{2}{2}$ = 1mol

1 mole of a substance contains 6.02 x 10²³ particles

the particles can be protons, neutrons, electrons

So,

2g of H₂ will contain 6.02 x 10²³ electrons.

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3 years ago

What are 3 stages of the water cycle are

Marta_Voda [28]

Evaporation,condensation, and precipitation.

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3 years ago

How is the mass in grams of the element converted to amount in atoms

Alik [6]

A substance's molar mass is calculated by multiplying its relative atomic mass by the molar mass constant (1 g/mol). ... By multiplying a given mass by the molar mass, the amount of moles of the substance can be calculated.

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3 years ago