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3 years ago

The red spheres represent oxygen atoms, and the blue spheres represent hydrogen atoms. Is this substance a compound?

2 answers:

7 0

I believe a compound, be definition, needs to be composed of different types of atoms, so it sounds like yeah, assuming the oxygen and hydrogen atoms are actually bonded together and not just floating randomly.

lianna [129]3 years ago

5 0

Answer: Yes.

Explanation:

The answer is Yes because it is made up of Atoms, or 2 or more elements bonded together. In your case, oxygen and Hydrogen is bonded together. Thus, yes, this is a compound.

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When the temperature of a gas changes, it's volume decreases from 12 cm3 to 7 cm3 if the final temperature is measured to be 18°

ElenaW [278]

Answer:

The initial temperature is 499 K

Explanation:

Step 1: Data given

initial volume = 12 cm3 = 12 mL

Final volume = 7 cm3 = 7mL

The final temperature = 18 °C = 291 K

Step 2: Calculate the initial temperature

V1/T1 = V2/T2

⇒with V1 = the initial volume = 0.012 L

⇒with T1 = the initial volume = ?

⇒with V2 = the final volume 0.007 L

⇒with T2 = The final temperature = 291 K

0.012 / T1 = 0.007 / 291

0.012/T1 = 2.4055*10^-5

T1 = 0.012/2.4055*10^-5

T1 = 499 K

The initial temperature is 499 K

8 0

2 years ago

The type of neuron that carries impulses from the brain are...

jek_recluse [69]

It’s Sensory Neurons!

5 0

2 years ago

Find the volume of 20g of H₂ at STP<br><br>

ANEK [815]

Answer:224

Explanation:

We should answer it with Stoichiometry

We say: 20 g H2× (1 mol/ 2g)× ( 22.4 lit/ 1 mol) = 224

Means: we have 20 grams and every 2g H2, equals to 1 mol of it and every 1 mol of H2, equals to 22.4 lit( because of STP)

hope you got this:)

6 0

2 years ago

What is the fraction of the hydrogen atom's mass (11h) that is in the nucleus? the mass of proton is 1.007276 u, and the mass of

ololo11 [35]

Hello there!

To determine the fraction of the hydrogen atom's mass that is in the nucleus, we have to keep in mind that a Hydrogen atom has 1 proton and 1 electron. Protons are in the nucleus while electrons are in electron shells surrounding the nucleus. The mass of the nucleus will be equal to the mass of 1 proton and we can express the fraction as follows:

$Mass Fraction= \frac{mass 1 Proton}{mass H atom} = \frac{1,007276 u}{1,007825}=0,9995$

So, the fraction of the hydrogen atom's mass that is in the nucleus is 0,9995. That means that almost all the mass of this atom is at the nucleus.

Have a nice day!

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3 years ago

If a person is throwing darts at a target, and shoots three in a row in the same spot on the 20 section outer ring, but none in

Gennadij [26K]

Maybe it is frisbee tag

5 0

2 years ago