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3 years ago

How to draw lewis dot structure of BH2-

Chemistry

1 answer:

frosja888 [35]3 years ago

6 0

I am attaching a picture cause I cannot write it directly

Hope it helps
Plz mark as brainliest

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Gerald's science teacher mixed room temperature samples of hydrochloric acid and sodium hydroxide in a large beaker. The solutio

shutvik [7]

Answer: Option (D) is the correct answer.

Explanation:

The chemical reaction equation will be as follows.

$HCl + NaOH \rightarrow NaCl + H_{2}O$

This means a new substance has been formed and a chemical change has taken place.

A chemical reaction in which heat energy is absorbed by the reactant molecules is known as an endothermic reaction.

For example, $A + B + Heat \rightarrow AB$

On the other hand, a chemical reaction in which heat energy is released by the reactant molecules is known as an exothermic reaction.

For example, $C + D \rightarrow CD + Heat$ is an exothermic reaction.

Thus, we can conclude that in the given situation the beaker most likely felt warm because a chemical reaction was producing a new substance.

8 0

3 years ago

A blu-ray laser has a wavelength of 405nm. In what region of the electromagnetic spectrum is this radiation? What is its frequen

love history [14]

Answer:

It lies in in the visible region.

Frequency: is 7.407 × 10^-14 Hz

${ \bf{V = f \lambda}} \\ { \tt{3.0 \times {10}^{8} = f \times (405 \times {10}^{ - 9}) }} \\ { \tt{f = 7.407 \times {10}^{14} \: hertz}}$

Explanation:

V is speed of light.

f is frequency

lambda is the wavelength

8 0

3 years ago

60 POINTS + BRAINLIEST !! PLEASE HELP!!

uranmaximum [27]

To get moles. divide mass by molar mass.Molar mass of
Na is 23
and for Cl is 35.5.
the total molar mass of NaCl is 23+35.5 = 58.5mol/gUse the mass and divide by this number30.22g divide by 58.5mol/g and you will get 0.5166 mole.
Since the molecule has 1 Na to 1 Cl, and that the number of moles for NaCL is 0.5166. All of them would be 0.5166molesNa = 0.5166 x 1 = 0.5166molesCl = 0.5166 x 1 = 0.5166moles
to get number of atoms. Multiply your mole by Avogadro number which is 6.022x10^23Na = 0.5166 x 6.022E23 = 3.111x10^23Cl = 0.5166 x 6.022E23 = 3.111x10^23

5 0

3 years ago

How many grams of calcium cyanide (Ca(CN)2) are contained in 0.79 mol of calcium cyanide?

Allushta [10]

I dont know but do you know da wae brudda?

3 0

3 years ago

A rock is found to have a mass of 200 g and a volume of 100 ml. what is the rock's density?

GaryK [48]

Mass over volume
200 over100
2

4 0

3 years ago