All categories

3 years ago

Carbon 14 has a half-life of 5,730 years. If a sample contained 70 mg originally, how much is left after 17,190 years.

Chemistry

1 answer:

Taya2010 [7]3 years ago

8 0

Answer: Mass after three decay is 8.75 mg

Explanation: if you divide 17190 by 5730 you see three decays has happened.

So you divide mass by two three times. 70 mg :2 = 35 mg, 35 mg :2 = 17.5 mg

And 17.5 mg:2 = 8,75 mg

You might be interested in

Which of the following tool components is unlikely to present a hazard

nydimaria [60]

Gloves is the tool component which will unlikely present a hazard in this scenario.

<h3>What is Hazard?</h3>

This is referred to as potential source of harm when performing various types of activities.

Gloves will unlikely cause harm as it is used to prevent the risk of electric shock when handling electrical devices which is why it is the most appropriate choice.

Read more about Hazard here brainly.com/question/7310653

#SPJ1

6 0

2 years ago

3. Which one of the following materials would best allow infrared waves to pass through it?

vredina [299]

Tin foil I think Noh sure

6 0

3 years ago

Read 2 more answers

i need to refill my helium tank which holds 2.5 liters, what in grams do I need to order the supplier?

Viktor [21]

answer: 2,500 grams

explanation:

1 liter = 1000 grams

simply multiply $2.5 liters*\frac{1000 grams}{1 liter} = 2,500 grams$

6 0

3 years ago

A 18.00 g g milk chocolate bar is found to contain 11.00 g g of sugar.1. How many milligrams of sugar does the milk chocolate ba

horrorfan [7]

Answer:

1. 1.100x10⁴mg

2. 2444mg

Explanation:

1. The 18.00g milk chocolate bar contain 11.00g of sugar. In miligrams:

11.00g * (1000mg / 1g) = 1.100x10⁴mg

2. If a bar of 18.00g contain 11.00g of sugar, a bar of 4.000g will contain:}

4.000g bar * (11.00g / 18.00g) = 2.444g of sugar.

In miligrams:

2.444g * (1000mg / 1g) = 2444mg

6 0

4 years ago

Calculate the molarity of 29.9 g of MgS in 911 mL of solution??

LUCKY_DIMON [66]

0.58 is the molarity of 29.9 g of MgS in 911 mL of solution.

Define the molarity of a solution.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

Given data:

Volume of solution = 911 mL=0.911L

Given the mass of MgS = 29.9 g

Molar mass of MgS = 56.38 g/mol

Moles of MgS = 0.5303299042

$Molality = \frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}$

$Molality = \frac{0.5303299042}{0.911L}$

Molality = 0.5821403998=0.58

Hence, 0.58 is the molarity of 29.9 g of MgS in 911 mL of solution.

Learn more about Molarity here:

brainly.com/question/2817451

#SPJ1

3 0

2 years ago