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skad [1K]
3 years ago
13

I am a metalloid. I have 7 valence electrons. I have 6 energy levels.

Chemistry
1 answer:
Alexxx [7]3 years ago
3 0
1 electron Bc of the electron you have
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Heather just drank 40.0 grams of water (H20). How many moles of water did she just drink? O a. 2.22 moles b. 45 moles O c. 40.0
Ksju [112]

Answer:

This question begins with something, you should know: molar mass from water is aproximately 18 g/m, so if 18 grams of water are contained in 1 mole, the 40 grams occuped 2.22 moles. As you see, opcion a is the best!

Explanation:

5 0
3 years ago
The density of a certain type of steel is 8.1 g/cm3. What is the mass of a 124 cm3 chunk of this steel? Show
posledela

Mass of the steel is 1004.4 g

  • density of a substance can be regarded as the ratio of the mass of that substance to that of it's volume.

  • Mass of substance can be regarded as the quantitative measure of inertia, it can be simply explained as a fundamental property of all matter

<em> We can express this mathematically as ;</em>

  • Density=  \frac{ mass  }{volume  }

Given :

Density of this steel= 8.1g/cm3

Mass=  124 cm^{3}

If we make Mass subject of formula,

Mass= ( density *volume)

Then let us substitute the values into the expression

Mass= (124*8.1)

= 1004.4 g

Therefore, mass of the steel is 1004.4 g

Learn more at: brainly.com/question/9196460?referrer=searchResults

8 0
3 years ago
Which chemical substance has the highest melting point? a) gold b) water c) oxygen d) mercury
gavmur [86]
Gold! it's boiling point is 2807 according to this chart:
http://www.lenntech.com/periodic-chart-elements/boiling-point.htm
6 0
3 years ago
Read 2 more answers
A vacuum gage connected to a chamber reads 35 kpa at a location where the atmospheric pressure is 92 kpa. determine the absolute
stealth61 [152]

Vacuum gage connected to a chamber reads 35 kpa at a location where the atmospheric pressure is 92 kpa then the  absolute pressure in the chamber and express is 57kpa

Gauge pressure is the pressure relative to atmospheric pressure. Gauge pressure is positive for pressures above atmospheric pressure, and negative for pressures and absolute pressure is the sum of gauge pressure and atmospheric pressure

Here to find absolute pressure atmospheric pressure=92kpa and  vacuum gage=35 kpa                                      

Pabsolute pressure=Patmospehric pressure - Pvaccume

92-35=57kpa

Know more about absolute pressure

brainly.com/question/28498660

#SPJ4

6 0
2 years ago
Why methyl orange in basic medium is yellow and why it is red in acidic medium?​
Sholpan [36]
Methyl orange shows red color in acidic medium and yellow color in basic medium. Because it changes color at the pKa of a mid strength acid, it is usually used in titration for acids. Unlike a universal indicator, methyl orange does not have a full spectrum of color change, but it has a sharp end point.
7 0
3 years ago
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