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likoan [24]
2 years ago
9

Which of the following is true about gravity? Select all that apply.

Chemistry
2 answers:
Dafna1 [17]2 years ago
8 0
Hi I think the answer is b. I don’t really know because I’m in 6 grade but this is my best guess
Ivenika [448]2 years ago
5 0

Answer:

its always attractive

Explanation:

pls follow me

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How to do dots and cross diagrams
Likurg_2 [28]

Answer:

Draw circles to represent the electron shell of each atom overlapping the circles where the atoms are bonded. Add dots to represent the outer electrons of one type of atom (H). Add crosses to represent the outer electrons of the other type of atom (Cl). Make sure the electrons are always in pairs.

6 0
3 years ago
What type of atoms form covalent bonds?
mariarad [96]

Answer: :)

Explanation:

In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom

4 0
3 years ago
Read 2 more answers
how would you write equation to show how buffers H2CO3 and NaHCO3 behave when (a) HCl is added and (b) NaOH is added.
Vlad1618 [11]
<span>H2CO3 <---> H+ + HCO3-
NaHCO3 <---> Na+ + HCO3-

When acid is added in the buffer, the excess H+ of that acid reacts with HCO3- to form H2CO3, and due to this NaHCO3 dissociates into HCO3- to attain the equilibrium. and hence there is no net effect of H+ due to pH remain almost constant. when a base is added to the buffer, the OH- ion of base react eith H+ ion present in buffer, then to attain equilibrium of H+ ion, the H2CO3 dissociates to produce H+ ion, but now there is the excess of HCO3- due to which Na+ ion react with them to attain equilibrium of HCO3-. hence there is again no net change in H+ ion due to which pH remain constant.....</span>
8 0
3 years ago
Write a decay equation for neon-19
nikitadnepr [17]

Answer:

Neon

Mass Number Half-life Decay Mode

Electron Capture

Electron Capture with delayed Proton Emission

18 1.6670 seconds Electron Capture

19 17.22 seconds Electron Capture

5 0
3 years ago
Convert 0.900 atm of pressure to its equivalent in millimeters of mercury. express the pressure numerically in millimeters of me
Angelina_Jolie [31]
1 atm = 760 mm Hg

Where 760 mm is the height of Mercury for 1 atm.

For 0.900 atm,

Height of mercury = 0.900*760 = 684 mm Hg
8 0
3 years ago
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