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Marrrta [24]
3 years ago
10

True or false guys! Please help!

Chemistry
2 answers:
topjm [15]3 years ago
6 0
False. Your welcome earthling
LenaWriter [7]3 years ago
4 0
False because the kenetic energy is non proficient
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Viktor [21]

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1.89 nol Cu(NO3)2

Explanation:

if you calculate it it will be 1.89

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2 years ago
The density of Mg is 1.74g/cm3. The density of strontium is 2.60g/cm3. What would you expect the density of Ca to be?
Tomtit [17]

The density of Ca will be between that of Mg and Sr

Explanation:

Ca, Mg and Sr are group II elements. They are called alkali earth metals. The correct order of the elements in this group are: Be, Mg, Ca, Sr, Ba and Ra.

Density is an intensive property of matter which describes the amount of matter(mass) per volume of a substance.

  • Density varies proportionally with mass. The higher the mass, the higher its density.
  • On the periodic table, atomic mass which the number of protons and neutrons in the nucleus of an atom increases down the group.
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Learn more:

density brainly.com/question/2658982

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6 0
3 years ago
What is amu of 99 % H-1, .2% H-1 and .8% H-3
ankoles [38]

The average atomic mass of your mixture is 1.03 u .

The average atomic mass of H is the weighted average of the atomic masses of its isotopes.  

We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its % abundance).  

Thus,  

0.99    × 1.01 u = 0.998 u

0.002 × 2.01 u = 0.004 u

0.008 × 3.02 u = <u>0.024 u</u>

            TOTAL =  1.03   u

4 0
3 years ago
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skelet666 [1.2K]

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6 0
3 years ago
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Explain how to produce a longitudinal wave on a spring that has large energy. There are two answers; one involves wavelength and
melamori03 [73]
Compressions are regions of high pressure due to particles being close together
rarefactions are regions of low pressure due to particles being spread further apart
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4 0
2 years ago
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