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3 years ago

I need help on question 1 and 2

Chemistry

2 answers:

Step2247 [10]3 years ago

8 0

Answer:semi metals

Explanation:

Phantasy [73]3 years ago

4 0

Answer:

1.positive, negative

2. Noble gases

Explanation:

difference in electrical charge means positive and negative

In the periodic table the last column is noble gases

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I will give brainliest!! How long is the pencil? Make sure to use the appropriate amount of significant figures.

8090 [49]

Answer: Option (c) is the correct answer.

Explanation:

The bottom of pencil is placed at the starting point of scale. Whereas the tip of pencil depicts the end point of its length.

The bottom of pencil is at 0 mm and tip of pencil is at 18.73 mm. The appropriate amount of significant figures is 18.73 mm.

Therefore, we can conclude that out of the given options, pencil is 18.73 mm long.

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3 years ago

A redox reaction can also be a?

AveGali [126]

Losing eltron is the answer

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3 years ago

Your role playing game party of high fantasy warriors arrives at a blacksmith to get new weapons forged. The blacksmith forges a

Drupady [299]

Answer:

THE FINAL TEMPREATURE OF IRON SWORD IS

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2 years ago

A gas occupies 547 L at 331K. Find its volume at 376K. You must show all of your work to receive credit. Also, name the gas law

zysi [14]

621.4L

Explanation:

Given parameters:

Initial volume = 547L

Initial temperature = 331K

Final temperature = 376K

Unknown:

Final volume = ?

Solution:

The appropriate gas law to use is the Charles's law.

The Charles's law shows the relationship between the volume and temperature of a gas under constant pressure.

The law states that "The volume of a fixed of a gas varies directly as its absolute temperature if the pressure is constant".

Mathematically;

$\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }$

V₁ is the initial volume

T₁ is the initial temperature

V₂ is the final volume

T₂ is the final temperature

Since the unknown is the final volume, we make it the subject of the expression;

V₂ = $\frac{V_{1} }{T_{1} } x T_{2} = \frac{547}{331 } x 376$

V₂ = 621.4L

learn more:

Boyle's law brainly.com/question/8928288

#learnwithBrainly

3 0

3 years ago

Read 2 more answers

If a sample of radioactive isotopes takes 60 minutes to decay from 200 grams to 50 grams, what is the half-life of the isotope

qaws [65]

Answer:

I HOPE IT WILL BE YOUR ANSWER:

Explanation:

As given

60 min = 50 gm (1)

then we know half-life mean half amount decay time

so we can write as the half of 200 is 100 gm hence

T 1/2 = 100 (2)

solving these two equation by cross multiplication we will get

T 1/2 = 120 min

THANKS FOR ASKING QUESTION

6 0

3 years ago