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larisa [96]
3 years ago
8

What energy conversion in your body enables you to get out of bed in the morning

Chemistry
1 answer:
Vadim26 [7]3 years ago
5 0
<span> The thermal </span>energy<span> is being </span>converted<span> to light </span>energy,<span> you are using electrical </span>energy<span>. </span>Your body<span> relies on the chemical </span><span>energy</span>
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Calcium has an atomic number of 20. How many electrons of a calcium atom are involved in chemical bonding?
NARA [144]

The answer is 2 electrons.


The electron configuration of calcium is 2:8:8:2

Calcium has two electrons in its outermost shell. These are its valence electrons and are the ones used in bonding with other elements.  Valence electrons of an atom are those electrons that are in its outer energy shell or that are available for bonding.

Calcium is a metal. When metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms forming ions. The resulting compound is known  as an ionic compound.

For example, when calcium metal reacts with chlorine gas,   calcium gives up its two valence electrons and Chlorine accepts them resulting in a new substance called calcium chloride in which the two elements have ended up forming ionic bonds.

3 0
3 years ago
4. Explain what you’ve learned about significant figures. How many significant figures are in the measurement 0.03050 kg?
nasty-shy [4]

There are 4 significant figures! Start counting after the first non-zero digit :)

Hope this helps.

3 0
3 years ago
how do the properties of compounds compare to the properties of the elements from which they are composed
Crank
<span>The elements that form the compound don't compare because it doesn't matter about the elements when they are combined. The elements that formed it together is completely different than the outcome compound. </span>
6 0
3 years ago
What is the mass of a piece of iron if its density is 1.98 g/mL and its volume is 2.45 mL?
viktelen [127]

Answer:

4.858 g

Explanation:

Start with the formula

density = \frac{mass}{volume}

density = 1.98 g/mL

volume = 2.45 mL

mass = ??

rearrange the formula to solve for mass

(density) x (volume) = mass

Add in the substitutes and solve for mass

1.98 g/mL x 2.45 mL = 4.858 g

3 0
3 years ago
Sound waves travel fastest through ______________ . A. water B. a vacuum C. iron D. air
FromTheMoon [43]
Water. Sound travels<span> four times </span>faster<span> in water than it does in air.</span>
8 0
3 years ago
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