All categories

3 years ago

What advances in science have been made as a result of radiometric dating?

Chemistry

1 answer:

Free_Kalibri [48]3 years ago

8 0

A more accurate geological timescale?
More accurate phylogenetic trees?

You might be interested in

Can someone help me with chemistry?

mihalych1998 [28]

<span>Right answer is D
</span>

8 0

3 years ago

Read 2 more answers

Ethanol is a common laboratory solvent and has a density of 0.789 g/ml. What is the mass, in pounds, of 39.0 gallons of ethanol?

USPshnik [31]

Mass = 39.0 gal × (3.785 L/1 gal) × (1000 mL/1 L) × (0.789 g/1 mL) × (1 lb/453.6 g) = 257 lb

3 0

3 years ago

Potassium -39 has how many neutrons

enyata [817]

Potassium has 20 neutrons

Hope this helps

5 0

3 years ago

How many hydrogen bonds are between cytosine and guanine

Lerok [7]

Answer:

Three

Explanation:

Three hydrogen bonds are between guanine and cytosine base pairs

Hopefully, that helps!

5 0

2 years ago

what volume of N2 is required to convert 5.0L of hydrogen gas to ammonia? assume that all gases are at the same temperature and

____ [38]

Answer:

Approximately $1.7\; {\rm L}$ .

Explanation:

Nitrogen ${\rm N_{2}}\, (g)$ reacts with hydrogen ${\rm H_{2}}\, (g)$ at a $1:3$ ratio to produce ammonia ${\rm NH_3}\, (g)$ :

${\rm N_{2}}\, (g) + 3\; {\rm H_{2}}\, (g) \to 2\; {\rm NH_{3}}\, (g)$ .

The ratio between the coefficient of ${\rm N_{2}}\, (g)$ and the coefficient of ${\rm H_{2}}\, (g)$ is:

$\begin{aligned}\frac{n({\rm N_{2}})}{n({\rm H_{2}})} = \frac{1}{3}\end{aligned}$ .

Under the ideal gas assumptions, the same ratio would apply to the volume of ${\rm N_{2}}\, (g)$ and ${\rm H_{2}}\, (g)$ in this reaction:

$\begin{aligned}\frac{V({\rm N_{2}})}{V({\rm H_{2}})} = \frac{n({\rm N_{2}})}{n({\rm H_{2}})} = \frac{1}{3}\end{aligned}$ .

$\begin{aligned}V({\rm N_{2}})= \frac{1}{3}\, V({\rm H_{2}})\end{aligned}$ .

Given that $V({\rm H_{2}}) = 5.0\; {\rm L}$ :

$\begin{aligned}V({\rm N_{2}}) &= \frac{1}{3}\, V({\rm H_{2}}) \\ &= \frac{1}{3}\times 5.0\; {\rm L} \\ &\approx 1.7\; {\rm L}\end{aligned}$ .

(Rounded to $2$ significant figures.)

5 0

2 years ago