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3 years ago

What is taxonomic richness

Chemistry

2 answers:

-BARSIC- [3]3 years ago

3 0

Answer:

I think you have a very cool username.

Explanation:

pshichka [43]3 years ago

3 0

Answer:

The number of different species represented in an ecological community, landscape or region

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PLEASE HELP DUE IN 15!!!!!!!!!!!! WILL GIVE BRAINLIEST!!

maria [59]

Explanation:

n=,4.5 moles C2H6

the ratio 2:7

4.5:x

x=15.75 moles

4 0

1 year ago

CH4 (g) + O2 (g) → CO2 (g) + H2O (g) to. If 28.6 g of CH4 is reacted with 57.6 g of O2, calculate the number of grams of CO2 pro

Sever21 [200]

Answer:

See explanation

Explanation:

First we must obtain the limiting reactant. The equation of the reaction is;

CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

Number of moles of CH4= 28.6 g/16g/mol = 1.8 moles

Since the reaction is 1:1, 1.8 moles of CO2 was produced

Number of moles of O2 = 57.6 g/32 g/mol = 1.8 moles

2 moles of O2 produced 1 mole of CO2

1.8 moles of O2 produced 1.8 × 1/2 = 0.9 moles of CO2

Hence O2 is the limiting reactant

Mass of CO2 produced = 0.9 moles × 44 g/mol = 39.6 g

%yield = 32.1g/39.6 g × 100

%yield = 81.1%

According to the reaction equation;

2moles of O2 reacts with 1 mole of CH4

1.8 moles of O2 reacts with 1.8 × 1/2 =0.9 moles of CH4

Number of moles of CH4 left = 1.8 moles - 0.9 moles

Number of moles of CH4 left = 0.9 moles

3 0

2 years ago

I want to tell my crush that I like him but we are virtual and I don't have a phone so I was going to email him. any advance on

siniylev [52]

Answer:

How to Tell Your Crush You Like Them Without Making Things Weird

Drop A Few Hints. ...

Give Yourself a Deadline. ...

Be Confident. ...

Make It Easy for Them. ...

But Also Make Sure You're Comfortable. ...

Consider How You Would Feel If You Didn't Tell Them. ...

Look At The Big Picture. ...

Stay Positive.

Explanation:

5 0

3 years ago

s sample of thorium-234 has a half life of 25 days. will all the thorium undergo radioactive decay in 50 days?

Assoli18 [71]

Answer:

25% thorium will left after 50 days.

Explanation:

Half life:

A nuclear half is the time period of radioactive material in which its amount remain halved.

In given question it is stated that the half life thorium-234 is 25 days. Which means after passing the 25 days the amount of thorium must be halved of original amount.

For example,

If the original concentration was 100%, than after 25 days it will be 50%.

After 50 days amount of thorium left:

Number of half life = T (elapsed) / T half life

Number of half life = 50/25

Number of half life = 2

At first half life amount of thorium left = 100/2 = 50

After second half life amount of thorium left = 50/2 = 25

Total amount decayed = 50+25 = 75

Amount left after 50 days = 100-75 = 25

25% thorium will left after 50 days.

5 0

3 years ago

When an atom of lithium loses an electron, the atom becomes a

Radda [10]

An electron has a negative charge. When an atom loses an electron, it becomes a positive ion.
When an atom of lithium loses an electron and becomes an ion, it has one less electron shell, so its radius is smaller than the radius of the atom.
The answer is 3.

5 0

3 years ago

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