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2 years ago

a boulder of shore is slowly broken apart by the force of the water it is a change or it is a example

Chemistry

1 answer:

natima [27]2 years ago

6 0

Answer:

I think that this would be an example of erosion

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What do cyanobacteria use to produce energy and by what process do they produce energy

andrezito [222]

As they contain, green pigement they can perform "Photosynthesis" and obtains energy from that process

Hope this helps!

7 0

2 years ago

What are the correct coefficients for each reactant and product when this equation is balanced? Make sure to select the correct

Mars2501 [29]

Answer: 44

Explanation:

5 0

3 years ago

Estradiol is a female sexual hormone that causes maturation and maintenance of the female reproductive system. Elemental analysi

Ipatiy [6.2K]

Answer:

The molecular formula of estradiol is: $C_{18}H_{24}O_2$ .

Explanation:

Molar mass of of estradiol = M= 272.37 g/mol

Let the molecular formula of estradiol be $C_xH_yO_z$

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100$

Percentage of carbon in estradiol :

$\frac{x\times 12 g/mol}{272.37 g/mol}\times 100=79.37\%$

x = 18.0

Percentage of hydrogen in estradiol :

$\frac{y\times 1g/mol}{272.37 g/mol}\times 100=8.88\%$

y = 24.2 ≈ 24

Percentage of oxygen in estradiol :

$\frac{z\times 16 g/mol}{272.37 g/mol}\times 100=11.75\%$

z = 2

The molecular formula of estradiol is: $C_xH_yO_z:C_{18}H_{24}O_2$

7 0

2 years ago

What are precautions to be taken when doing titrations? A-Make sure to always vigorously shake that flask after every drop if th

-BARSIC- [3]

Answer:

Explanation:

This is because all steps from A-D are important to obtain an accurate result

6 0

2 years ago

If the density of an object is 5 g/cm3 and it takes up 7 cm3 of space, calculate the mass?

statuscvo [17]

Answer:

<h2>The answer is option A</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of object = 7 cm³

density = 5 g/cm³

The mass of the object is

mass = 5 × 7

We have the final answer as

Hope this helps you

8 0

3 years ago