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deff fn [24]
4 years ago
14

Your hands get warm by a fire because ________________energy is converted into heat energy.

Chemistry
2 answers:
telo118 [61]4 years ago
5 0
A chemical because chemicals are in the wood or flame and produce light and heat.
klasskru [66]4 years ago
3 0

The wood of the fire releases <u>energy</u> from <em>chemical</em><em> </em>bonds when it combines with oxygen in the burning process. This <u>energy</u> is transferred to<u> heat</u> and your hands feel happy.



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How can i find nuclear charge and overall charge while only knowing the atomic mumber, number of protons and electrons?​
Mazyrski [523]

Explanation:

An atom is made up of:

  • Protons which are the positively charged particles
  • Electrons are negatively charged
  • Neutrons carry no charges.

Atomic number is the number of protons in an atom.

To find the nuclear charge:

    We use the effective nuclear charge formula:

   Effective nuclear charge = Atomic number - number of shielding electrons(non-valence electrons)

The shielding electrons are the non-valence electrons in the inner orbitals.

For example:

  Ne:

          atomic number = 10

          Effective nuclear charge = 10 - (2) = 8+

   Number of non-valence electrons is 2

The effective nuclear charge is 8+

Overall charge:

        Charge = number of protons - number of electrons

  For neutral atoms, the overall charge is zero as the number of protons and electrons are the same.

 

Learn more:

Effective nuclear charge brainly.com/question/5441986

#learnwithBrainly

7 0
3 years ago
Please help..
Hoochie [10]

Answer:

1.

Explanation:

Let's start with the hydrogen. If we have 4 grams of hydrogen, it would be enough for 4 * 9 = 36 grams of water. Well, that can't be possible ...

4 votes

8 0
2 years ago
A sample of lead has the density of 58 g/mL and a mass of 15.2g, what is the volume of the lead?
torisob [31]

Answer:

0.26 ml

Explanation:

d = m/V

=> V = m/d = 15.2/58 = 0.26 ml

4 0
1 year ago
Flowers start as a sprout. Opinion Fact
Harman [31]

Answer:

FACT!!!!!!!!!!

Explanation:

4 0
3 years ago
Why does Beryllium have a larger first Ionization energy than boron?
Nata [24]
This is an exception to the general electronegativity trend. It can be explained by looking at the electron configurations of both elements.

<span>Be:[He]2<span>s2
</span></span><span>B:[He]2<span>s2</span>2<span>p1

</span></span>

When you remove an electron from beryllium, you are taking away an electron from the 2s orbital. When you remove an electron from boron, you are taking an electron from the 2p orbital. The 2p electrons have more energy than the 2s, so it is easier to remove them as they can more strongly resist the effective nuclear charge of the nucleus.

7 0
4 years ago
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