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3 years ago

10

Which of the following have been determined as the oldest living tree types on Earth? Select all that apply.

1 answer:

fiasKO [112]3 years ago

6 0

Sequoia and Bristle cone pine

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Which best explains the difference between a monomer and a polymer?

Rainbow [258]

All monomers have the capacity to form chemical bonds to at least two other monomer molecules. Polymers are a class of synthetic substances composed of multiples of simpler units called monomers.

7 0

2 years ago

Read 2 more answers

Arrange these molecules in order of decreasing mass: C6H14 , NO2 , Fe2O3 , and CaCO

babunello [35]

The following is the arrangement of the given molecules in decreasing order of mass: $\text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}$

<u>Solution:</u>

First inorder to arrange the elements in descending order of their mass we have to calculate the molecular mass of each element. The calculation is as follows:

<u>Mass of C6H14:</u>

$C\rightarrow6\times12.01 = 72.06$

$H\rightarrow14\times1.008 = 14.112$

<em>Mass of C6H14 is 86.172</em>

<u>Mass of NO2:</u>

$N\rightarrow1\times14.0067 = 14.0067$

$O\rightarrow2\times15.9994 = 31.9988$

<em>Mass of NO2 is 46.0055</em>

<u>Mass of Fe2O3:</u>

$Fe\rightarrow2\times55.845 = 111.69$

$O\rightarrow3\times15.9994 = 47.9982$

<em>Mass of Fe2O3 is 159.6882</em>

<u>Mass of CaCO:</u>

$Ca\rightarrow1\times40.078 = 40.078$

$C\rightarrow1\times12.01 = 12.01$

$O\rightarrow1\times15.9994 = 15.9994$

<em>Mass of CaCO will be 68.0874</em>

So, the order will be $159.6882>86.172>68.0874>46.0055$ which is $\text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}$

6 0

3 years ago

PLEASE HELP!!!! I NEED TO TURN IT IN TODAY!!

In-s [12.5K]

Answer:

hey mines due today did u ever get the answerrr!!

Explanation:

6 0

3 years ago

1. Choose the correct answer from the given alternative. 1. A blood sample analysis showed that a total of 0.0000036g lead. Expr

son4ous [18]

Answer:

3.6 micrograms answers (c)

Explanation:

5 0

2 years ago

katovenus [111]

Answer:

A. 6atm

Explanation:

Using pressure law equation:

P1/T1 = P2/T2

Where;

P1 = initial pressure (atm)

T1 = initial temperature (K)

P2 = final pressure (atm)

T2 = final temperature (K)

According to this question;

P1 = 3 atm

P2 = ?

T1 = 120K

T2 = 240K

Using P1/T1 = P2/T2

3/120 = P2/240

Cross multiply

240 × 3 = P2 × 120

720 = 120P2

P2 = 720/120

P2 = 6atm

4 0

3 years ago