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3 years ago

How many moles are there in 3.45 moles of Carbon

Chemistry

1 answer:

VladimirAG [237]3 years ago

7 0

Answer:

It would be 151.832775 because one mole is 44.0095*3.45 i hope this helps!

Explanation:

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An archaeologist finds 14C in a sample of material to be decaying at 20 Geiger Counter clicks per second. A modern equivalent sa

Kay [80]

Answer:

17188 years

Explanation:

Recall the formula;

0.693/t1/2 = 2.303/t log(No/N)

t1/2 = half life of 14C

No = initial activity of 14C

N = activity of 14C at time t

t = age of the sample

Substituting values

0.693/5730= 2.303/t log(160/ 20)

1.21 * 10^-4= 2.0798/t

t = 2.0798/1.21 * 10^-4

t = 17188 years

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3 years ago

An ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of

user100 [1]

Answer:1. 5

Explanation: the element is boron and the atomic number is 5

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3 years ago

Fill in the blanks with the correct responses. Electricity is the movement of free electrons from __________charged areas to ___

Yuki888 [10]

Answer:

positive

negative

Explanation:

Usually electricity moves from positively charged to negatively charged eletrons

4 0

2 years ago

There are (how many?) significant figures in: 0.0050110400

DanielleElmas [232]

I want to say 8 but i'm not sure. I just did a lesson on this and my notes say it could be 8 but then again I'm not sure.

5 0

3 years ago

rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water. The water level rose. Whats the density o

Natali5045456 [20]

The density of the rock in g/mL : 14 g/ml

Complete question :

A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. The water level rose to 35 mL calculate the density of the rock in g/mL

<h3>Further explanation</h3>

Density is a quantity derived from the mass and volume

Density is the ratio of mass per unit volume

Density formula:

$\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}$

ρ = density

m = mass

v = volume

mass of rock = 70 g

Volume of the rock : 35 - 30 = 5 ml

So the density :

$\tt \rho=\dfrac{70}{5}\\\\\rho=14~g/ml$

6 0

3 years ago