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3 years ago

( its supposed to be science but whatever )

Chemistry

2 answers:

lana66690 [7]3 years ago

7 0

Answer:

true

Explanation:

because God created darkness and water first on th first day .according to order sources

Paha777 [63]3 years ago

5 0

yes it has been on the planet since creation

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Consider the chemical equation below.

igor_vitrenko [27]

Answer : The net ionic equation will be,

$2H^{+}(aq)+2OH^-(aq)\rightarrow H_2O(l)$

Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The given balanced ionic equation will be,

$Mg(OH)_2(aq)+2HNO_3(aq)\rightarrow Mg(NO_3)_2(aq)+H_2O(l)$

The ionic equation in separated aqueous solution will be,

$Mg^{2+}(aq)+2OH^-(aq)+2H^{+}(aq)+2NO_3^{-}(aq)\rightarrow H_2O(l)+Mg^{2+}(aq)+2NO_3^{-}(aq)$

In this equation, $Mg^{2+}\text{ and }NO_3^-$ are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

$2H^{+}(aq)+2OH^-(aq)\rightarrow H_2O(l)$

7 0

3 years ago

Hydrogen atoms in a discharge tube are in their ground state. If a beam of free electrons of energy12.9 eV are fired at the hydr

defon

Answer:

See explanation

Explanation:

-0.7ev = -13.6/n^2

n= 4

4--->1

4--->3, 3---> 2, 2--->1

E4-E1= -13.36(1/4^2 - 1/1^2) = 12.53 eV

E4-E3 = -13.36 (1/4^2 - 1/3^2) = 0.65 ev

E3-E2 = -13.36 (1/3^2 - 1/2^2) = 1.86 eV

E2- E1 = -13.6 ( 1/2^2 - 1/1^2) = 10.02 ev

λ= 6.6 × 10^-34 × 3 × 10^8/12.53 × 1.6 × 10^-19

λ= 19.8 × 10^-26/20.048 ×10^-19

λ= 9.9 × 10^ -8 m

λ= 6.6 × 10^-34 × 3 × 10^8/0.65 × 1.6 × 10^-19

λ= 19.8 × 10^-26/1.04 ×10^-19

λ= 19.0 × 10^ -7 m

3 0

3 years ago

What is a negatively charged subatomic particle?

zvonat [6]

I think its electrons

5 0

3 years ago

Which one of the following compounds will NOT be soluble in water?

cluponka [151]

See the correct answer is b.)PbS

8 0

3 years ago

Plzzzzzzzzzzzzzzzz help

Anna [14]

Answer:

Your correct.

Explanation:

5 0

3 years ago

Read 2 more answers