All categories

3 years ago

The half life of carbon is 5700 years. if you started with 100g of carbon 14 how much would remain after 4 half lives

Chemistry

1 answer:

kherson [118]3 years ago

3 0

When dealing with a half life question, you should use the half life formula which is: y = a(b)^t/h

You might be interested in

Rank the solutions in order of decreasing [H3O ]. Rank solutions from largest to smallest hydronium ion concentration. To rank i

Usimov [2.4K]

Answer:

0.10M HCN < 0.10 M HClO < 0.10 M HNO₂ < 0.10 M HNO₃

Explanation:

We are comparing acids with the same concentration. So what we have to do first is to determine if we have any strong acid and for the rest ( weak acids ) compare them by their Ka´s ( look for them in reference tables ) since we know the larger the Ka, the more Hydronium concentration will be in these solutions at the same concentration.

HNO₃ is a strong acid and will have the largest hydronium concentration.

HCN Ka = 6.2 x 10⁻¹⁰

HNO₂ Ka = 4.0 x 10⁻⁴

HClO Ka = 3.0 x 10⁻⁸

The ranking from smallest to largest hydronium concentration will then be:

0.10M HCN < 0.10 M HClO < 0.10 M HNO₂ < 0.10 M HNO₃

5 0

4 years ago

Calculate the volume of an

lions [1.4K]

Answer:

The formula for the volume of a solid rectangle is width x depth x height. Divide the volume by the product of the length and width to calculate the height of a rectangular object. For this example, the rectangular object has a length of 20, a width of 10 and a volume of 6,000.

Explanation:

3 0

3 years ago

What is the molality of an aqueous KCl solution with a mole fraction of KCl, XKCl = 0.175? (The molar mass of KCl = 74.55 g/mol

NARA [144]

Answer:

The molality of the KCl solution is 11.8 molal

Explanation:

Step 1: Data given

Mol fracrion KCl = 0.175

Molar mass KCl = 74.55 g/mol

Molar mass H2O = 18.02 g/mol

Step 2: Calculate mol fraction H2O

mol fraction H2O = 1 - 0.175 = 0.825

Step 3: Calulate mass of H2O

Suppose the total moles = 1.0 mol

Mass H2O = moles H2O * molar mass

Mass H2O = 0.825 * 18.02 g/mol

Mass H2O = 14.87 grams = 0.01487 kg

Step 4: Calculate molality

Molality KCl = 0.175 / 0.01487 kg

Molality KCl = 11.8 molal

The molality of the KCl solution is 11.8 molal

5 0

3 years ago

Find the formula for the compound that contains 72.40% iron and 27.60% oxygen.

taurus [48]

FeO is the answer. It was a Pleasure to help!

3 0

3 years ago

Please help quickly as possible thank you :)

Leviafan [203]

When an object/liquid/food etc contains hot energy, the heat particles are moving around causing the heat. 8ounces of soup would cool off faster, because there is less liquid for the heat particles to be in, there for less heat particles, therefore cooling off faster. Pls give Brainliest, and good luck!

8 0

3 years ago

Read 2 more answers