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3 years ago

Which best describes thermal energy

Chemistry

2 answers:

katen-ka-za [31]3 years ago

5 0

Answer:

thermal energy results in an object or a system having a temperature that can be measured. Thermal energy can be transferred from one object or system to another in the form of heat

Explanation:

Natalija [7]3 years ago

3 0

Answer:

Thermal energy can be found in things like a lit candle, a hot oven, even the body heat given off by a person

Hope this helps :)

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A volumetric flask contains 25.0 mL of a 14% m/V sugar solution. If 2.5 mL of this solution is added to 22.5 mL of distilled wat

creativ13 [48]

Answer:

The new solution is 1.4% m/V

Explanation:

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3 years ago

What is another element that will have the same valence electrons as Be and Ca?

Oduvanchick [21]

Another element maybe BeCa if you combine them

8 0

3 years ago

Iridium has only two naturally occurring isotopes. Ir-191 with arelative mass of 190.96058 and Ir-193 with a relative mass of192

OLEGan [10]

Answer: The fractional abundance of Ir-191 is 0.372

Explanation:

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

Let the fractional abundance of Ir-191 be x and that of Ir-193 isotope be (1-x)

For isotope 1 (Ir-191):

Mass of isotope 1 = 190.96058 amu

Fractional abundance of Ir-191 = x

For isotope 1 (Ir-193):

Mass of isotope 1 = 192.96292 amu

Fractional abundance of Ir-193 = (1 - x)

Average atomic mass of iridium = 192.217 amu

Putting values in equation 1, we get:

$192.217=[(190.96058\times x)+(192.96292\times (1-x))]\\\\x=0.372$

Hence, the fractional abundance of Ir-191 is 0.372

6 0

3 years ago

What is the approximate total number of atoms in 1.0 mole of lithium?

chubhunter [2.5K]

Answer:

6.0 x 10 to the power of 23

6 0

3 years ago

Why would you not expect to find fossils in metamorphic and igneous rocks?

Marina CMI [18]

Answer:

igneous rocks are made from molten,and therefore rarely have fossils in them.Metamorphic rocks are squished,put under pressure,and get heated to the extreme,so it's very rare for fossils to survive in these conditions.

8 0

3 years ago