Chem Data Analysis help plzz 2.6 x 10⁸ ÷ 9.0 x 10¹⁰

Which molecule is pentanoic acid? ОА. Н 1 НЕС-ОН ОВ. Н ОН ор.н.н

kicyunya [14]

Answer:

PubChem CID 7991

Structure Find Similar Structures

Chemical Safety Laboratory Chemical Safety Summary (LCSS) Datasheet

Molecular Formula C5H10O2 or CH3(CH2)3COOH

Synonyms Valeric acid PENTANOIC ACID n-Valeric acid 109-52-4 n-Pentanoic acid More.

4 0

3 years ago

a radioisotope has a half life of three hours how much of a 120g sample remains after 9 hours. what will the g amount be after 3

aksik [14]

$\huge\boxed{♔︎Answer♔︎}$

60g after 3 hours, 30g after 6 hours and 15g after 9 hours

Explanation:

Weight of the radioactive sample = 120g

half life time period = 3 hours

(a) The weight of sample after 3 hours

$\textsf{ No. of half lives} = \sf \cancel\frac{3}{3} = 1$

The fraction of sample left

$\sf { \frac{1}{2} }^{1} = \frac{1}{2}$

Mass of the sample left

$\sf \frac{1}{2} \times 120 = \cancel\frac{120}{2} = 60g$

60g of sample is left after 3 hours

(b) The weight of sample after 6 hours

$\textsf{ No. of half lives} = \sf \cancel\frac{6}{3} = 2$

The fraction of the sample left

$\sf { \frac{1}{2} }^{2} = \frac{1}{2} \times \frac{1}{2} = \frac{1}{4}$

Mass of the sample left

$\sf \frac{1}{4} \times 120 = \cancel\frac{120}{4} = 30g$

30g of sample is left after 6 hours

(c) The weight of sample after 9 hours

$\textsf {No. of half lives} = \sf \cancel\frac{9}{3} = 3$

The fraction of sample left

$\sf { \frac{1}{2} }^{3} = \frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} = \frac{1}{8}$

Mass of sample left

$\sf \frac{1}{8} \times 120 = \cancel \frac{120}{8} = 15g$

15g of sample is left after 9 hours.

3 0

2 years ago

Which is the best example of the law of conservation of energy?

asambeis [7]

Answer:

The answer is B. A rolling skateboard slows down because some of its kinetic energy changes to heat.

Explanation:

The law of conservation says energy cant be created or destroyed .Which basically eliminates all of them except b. It can only be transferred

7 0

3 years ago

Read 2 more answers

The image shows sedimentary rock layers with index fossils and a fault.

GrogVix [38]

Answer:

Layer 2 and layer 9 is the same relative age since it is the same type of rock and has the same fossils.

Hope this helped!

4 0

3 years ago

PLEASE PLEASE HELPPP ITS DUE SOON ILL GIVE BRAINLIEST

gayaneshka [121]

Answer:

Explanation:

Using at least three sentences,, explain the four stages involved in genetic engineering/gene cloning.

Stage 1: Isolation of the target gene

Stage 2: Insertation of the target gene

Stage 3: Introduction of the vector into a host

Stage 4: Amplification of the target gene by the host cell and screening

8 0

3 years ago

Chem Data Analysis help plzz2.6 x 10⁸ ÷ 9.0 x 10¹⁰​

Chem Data Analysis help plzz2.6 x 10⁸ ÷ 9.0 x 10¹⁰