2 years ago

What happens to ionization energy as you go across a period from left to right

Chemistry

1 answer:

vodka [1.7K]2 years ago

7 0

Answer:

It go on increasing

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5. The mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a

Ludmilka [50]

Answer:

5.25yr

Explanation:

I think so

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2 years ago

What is the mass of arsenic that is contained in a 50.0 g sample if the concentration is 5 ppm?

faltersainse [42]

Answer: The mass of arsenic found in the sample is 0.25 mg

Explanation:

ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.

To calculate the ppm of oxygen in sea water, we use the equation:

$\text{ppm}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^6$

Both the masses are in grams.

We are given:

Concentration of arsenic = 5 ppm

Mass of sample = 50 g

Putting values in above equation, we get:

$5=\frac{\text{Mass of arsenic}}{50g}\times 10^6\\\\\text{Mass of arsenic}=\frac{5\times 50}{10^6}=0.00025g=0.25mg$

Conversion factor used: 1 g = 1000 mg

Hence, the mass of arsenic found in the sample is 0.25 mg

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3 years ago

Which one allows you to obtain the most precise volume? Circle one.the first one on the right because it's too ee and also helps

yanalaym [24]

Answer:50 ml ☺️

Explanation:

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2 years ago

Which type of front occurs when cold air and warm air are next to each other, but are at a standstill?

noname [10]

Occluded font. For sure

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2 years ago

28.7 l of propane, c3h8, are consumed in a combustion reaction. how many grams of water are produced?

lora16 [44]

The chemical reaction would be:

C3H8 + 5O2 = 3CO2 + 4H2O

For this case, we assume that gas is ideal thus in every 1 mol the volume would be 22.41 L. We calculate as follows:

28.7 L C3H8 ( 1 mol / 22.41 L ) ( 4 mol H2O / 1 mol C3H8 ) ( 18.02 g / mol ) = 92.31 g H2O produced

Hope this answers the question.

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3 years ago