The number of neutrons in the nucleus of an atom can be determined by(1) adding the atomic number to the mass number
(2) subtracting the atomic number from the mass number
(3) adding the mass number to the atomic mass
(4) subtracting the mass number from the atomic number

Answers

Answer 1

Answer: Option no. 2 subtracting the atomic number from the mass number

Example: Zn - 65 atomic weight or mass/mass number
30 atomic number

65-30 = 35 number of neutrons

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Copper(i) ions in aqueous solution react with nh3(aq) according to

Answers

The complete question is; copper (i) ions in aqueous solutions react with NH3(aq) according to;
Cu +2NH3 = Cu(NH3)2 Kt= 6.3 × 10^10
Calculate K
Cu + 2NH3 = Cu(NH3)2
kf = 6.3 ×10^10
The ksp for CuBr = Cu + Br = 6.3 × 10^-9
For the reaction; CuBr +2NH3 = Cu(NH3)2 + Br to calculate K?
K = (6.3 × 10^10)(6.3×10^-9)
Thus K is 396.9

In the process of ionization, what is the relationship between the second ionization energy and the third ionization energy?

Answers

The first ionization energy is the energy it takes to remove an electron from a neutral atom. The second ionization energy is the energy it takes to remove an electron from a 1+ ion. (That means that the atom has already lost one electron, you are now removing the second.) The third ionization energy is the energy it takes to remove an electron from a 2+ ion. (That means that the atom has already lost two electrons, you are now removing the third.)
And 2nd ionization energy is higher than 1st ionization energy, 3rd is higher than 2nd, and so forth.

Which of the following measurements has three significant figures?A. 5100 m
B. 0.005 m
C. 0.510
D. 0.051

Answers

The correct answer is C: 0.510 m

N I C E - D A Y!

Answer:

Explanation:

a) has 2 sig. figures

b) has 1 sig. figures

c) has 3 sig. figures

d) has 2 sig. figures

How many calories are there in 32 Calories

Answers

Answer:

Explanation:

What should you look for in a chemical formula to decide is a compound or element will not combust

Answers

To determine whether a chemical formula represents a compound or element that will not combust, you need to consider the elements present in the formula and their respective properties.

How we can determine combustibility?

First, check if the formula contains only one type of element. If it does, then it represents an element, and the question of whether it will combust or not is irrelevant, as elements do not combust.

If the formula contains two or more different elements, then it represents a compound. To determine if the compound will combust, you need to look at the properties of its constituent elements.

Some elements, such as noble gases (e.g., helium, neon, argon), have very low reactivity and are unlikely to combust under normal conditions. Therefore, if the compound contains only noble gases, it is unlikely to combust.

Other elements, such as metals, are more reactive and can combust under certain conditions, such as exposure to heat or oxygen. Therefore, if the compound contains a metal, you need to check the reactivity of that metal to determine if the compound will combust.

Similarly, non-metals can also be combustible under certain conditions, such as exposure to heat or other reactive substances. Therefore, if the compound contains a non-metal, you need to check the reactivity of that non-metal to determine if the compound will combust.

Overall, to determine if a compound or element will combust, you need to consider the properties of its constituent elements and any external conditions that may affect its reactivity.

Find more on combustible gases:

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You will look at its number lets say if you had H2O which is two hydrogen and one oxygen. The two hydrogen is combined with oxygen sharing it's electrons making it being covalent bonding. You need 8 valence electrons that meaning full outershell. Hydrogen only has one in it outershell oxygen has 6 that's what can make a compound

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