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2 years ago

Pleaseeee help pretty please

Chemistry

2 answers:

lesantik [10]2 years ago

4 0

Answer:

A object made from iron .

Explanation:

KATRIN_1 [288]2 years ago

4 0

I believe the answer is any object made up of iron since iron has a strong reaction to magnets so it must have a strong connection with the magnetic field

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The compound ncl3 is nitrogen trichloride, but alcl3 is simply aluminum chloride. why

AveGali [126]

The answer to this question would be:
NCl3 is a molecular compound (two or more nonmetals), and therefore in its name prefixes indicate the number of each type of atom. so NCl3 is nitrogen trichloride.
The compound AlCl3 is an ionic compound (metal and nonmetal), and therefore does not require prefixes. so AlCl3 is aluminum chloride.

Both of nitrogen and chlorine is nonmetal, but aluminum is metal. Metal with nonmetal will make an ionic compound that doesn't need prefixes.

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3 years ago

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Cos2x+5sinx=3 help????

Ipatiy [6.2K]

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2 years ago

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A certain watch’s luminous glow is due to zinc sulfide paint that is energized by beta particles given off by tritium, the radio

sp2606 [1]

Answer:

The watch is 40.9 years old.

Explanation:

To know how many years old is the watch we need to use the following equation:

$I_{(t)} = I_{0}e^{-\lambda t}$ (1)

Where:

$I_{(t)}$ : is the brightness in a time t = (1/10)I₀

$I_{0}$ : is the initial brightness

λ: is the decay constant of tritium

The decay constant is given by:

$\lambda = \frac{ln(2)}{t_{1/2}}$ (2)

Where:

$t_{1/2}$ : is the half-life of tritium = 12.3 years

By entering equation (2) into (1) we have:

$I_{(t)} = I_{0}e^{-\lambda t} = I_{0}e^{-\frac{ln(2)}{t_{1/2}}t}$

$\frac{I_{(t)}}{I_{0}} = e^{-\frac{ln(2)}{t_{1/2}}t}$

By solving the above equation for "t" we have:

$ln(\frac{I_{(t)}}{I_{0}}) = -\frac{ln(2)}{t_{1/2}}t$

$t = -\frac{ln(\frac{I_{(t)}}{I_{0}})}{\frac{ln(2)}{t_{1/2}}} = -\frac{ln(\frac{1}{10})}{\frac{ln(2)}{12.3}} = 40.9 y$

Therefore, the watch is 40.9 years old.

I hope it helps you!

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2 years ago

How many liters of water are needed to prepare a 1.67M solution of Ba(OH)2 if you need to dissolve 235g of it?

Naily [24]

Answer: 2.04

Explanation:

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2 years ago

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Click the "draw structure" button to launch the drawing utility. Draw the structure of the major organic product isolated from t

Anika [276]

Answer:

cis-hex-2-ene as produced as major product.

Explanation:

In presence of $Pd/BaSO_{4}$ (Lindlar catalyst) and $H_{2}$ , alkynes are reduced to alkene.
$H_{2}$ molecules first adsorbed onto metal surface through chemisorption.
When alkyne molecule comes in close proximity to the metal surface, H atoms add onto triple bond to reduce it to alkene.
Two H atoms add onto alkyne from same face of metal. So, (Z) or cis-isomer of alkene is produced as a major product.
Reaction mechanism has been shown below.

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2 years ago