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IRISSAK [1]
3 years ago
15

Is barium a metal or non metal?

Chemistry
2 answers:
yarga [219]3 years ago
5 0
It is an alkaline earth metal.
n200080 [17]3 years ago
5 0
Yes barium is metal. it's covered with "earth metal"  
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A piece of aluminum weighing 10.0 grams is placed into a graduated cylinder that has an initial volume (before immersion) of 35.
padilas [110]

Answer:

The density of the metal sample is 2.70 \frac{grams}{mL}

Explanation:

Density is a magnitude that allows you to measure the amount of mass in a given volume of a substance. Then, the expression for the calculation of density is the ratio between the mass of a body and the volume it occupies:

d=\frac{m}{V}

Density, according to the International System of Units, is usually expressed in kilograms per cubic meter (kg / m3) or gram per cubic centimeter (g / cm3). Although it can also be expressed in any other unit of mass by volume.

So, for the calculation of density you know that:

  • mass of the sample= 10 grams
  • volume of the sample = volume on the cylinder after immersion - volume on the cylinder before immersion= 38.7 mL - 35.0 ml = 3.7 mL

Then:

d=\frac{10 grams}{3.7 mL}

d=2.70 \frac{grams}{mL}

<u><em>The density of the metal sample is 2.70 </em></u>\frac{grams}{mL}<u><em></em></u>

5 0
3 years ago
What is the number of electrons shared in the multiple carbon-carbon bond in one molecule of 1-pentyne?
Vesnalui [34]
The correct answer for the given question above would be option A. The number of electrons shared <span> in the multiple carbon-carbon bond in one molecule of 1-pentyne is 6. -YNE is considered as a triple bond. This would mean 3 pairs of electrons of 6 electrons. Hope this answers your question. Have a great day!</span>
8 0
3 years ago
Read 2 more answers
What is a physical change that could not easily be reversed?
mylen [45]

Answer:

the answer is number 1

Explanation:

because when you make toast you burn it you toast it and there is no way to undo that.

8 0
3 years ago
I NEED HELP :)
BlackZzzverrR [31]

Answer:

48 mph

Explanation:

total time= 19/12 hr

distence- 76 miles

speed- D/T=76/19/12

which is 48mph

if my answer helps please mark as brainliest.

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3 years ago
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The toy car in the picture is propelled forward by A) The weight of the car. B) The force of the car on the air. C) The friction
katovenus [111]

Answer:

the answer is d :)

Explanation:

7 0
4 years ago
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