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zlopas [31]
3 years ago
12

Three students use a meterstick with millimeter markings to measure a length of wire. Their measurements are 3 cm, 3.3 cm, and 2

.87 cm,
respectively. Explain which answer was recorded correctly.
Chemistry
2 answers:
Volgvan3 years ago
7 0

Answer: 3 cm

Explanation:

andreev551 [17]3 years ago
3 0
The answer is 3 I had this two
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What mass of water can be obtained from 4.0 g of H2 and 16 g of O2?
rusak2 [61]

Answer:

18 grams of water, will be produced from 4 g of H₂ and 16g of O₂

Explanation:

Reaction: 2H₂ + O₂  ⇒  2H₂O

Moles = Mass / Molar mass

Molar mass H₂ = 2g/m

Molar mass O₂ = 32 g/m

4g /2g/m = 2moles

16g / 32 g/m = 0.5 moles

Ratio is 2:1

For 2 moles of hydrogen, I need 1 mol of oxygen; I have 2 moles of H₂, but I only have 0.5 of O₂, so the O₂ is the limiting reagent.

1 mol of O₂ produces 2 mol of water

0.5 moles of O₂ will produce, the double → 1 mol of water.

Molar mass of water is 18 g/m

1 mol . 18 g/m = 18 g

4 0
3 years ago
What has the shortest or smallest wavelength.
Marrrta [24]

Answer:

Gamma Rays

Gamma Rays-have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum.

Explanation:

6 0
3 years ago
Which diagram shows the correct electron configuration for fluorine (F)?
sdas [7]

Answer:

it's A

Explanation:

The given element is, fluorine is a non-metal with symbol (F). It is a gas and belongs to the group 17 and period 2.

The atomic number of fluorine = 9

The number of electrons = 9

6 0
2 years ago
Read 2 more answers
The term _____ describes a substance that can act as both an acid and a base.
telo118 [61]

The term amphoteric describes a substance that can act as both an acid and a base.

8 0
3 years ago
How many atoms are in 4 mol Zn?
Brut [27]
To covert from moles to atoms times the number of moles by Avogadro's Number (6.022×10²³)

4.0 × 6.022×10²³ = 2.4088×10^24
6 0
3 years ago
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