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3 years ago

How can ocean acidification affect us humans

1 answer:

3 0

These changes are impairing the ocean's capacity to provide food, protect livelihoods, maintain clean water, and recover from environmental stresses like severe storms.

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Henry Moseley used X-ray experiments to determine the atomic number of elements. How did his discovery contribute to the develop

sesenic [268]

Here we have to chose the correct statement which affect the discovery of the atomic number on the periodic table.

The discovery of the atomic number of the elements: C. It allowed the elements to be placed in strict order of increasing atomic number.

The use of X-ray determined the atomic number or number of electrons present in an element. The number of electrons is the basis of generate the periodic table, where the elements are arranged in terms of the number of electrons present in the atom in early stage of periodic table.

However in later the modern periodic table generated, which has group and period in terms of their property. Although the strictness on the increasing number of electrons are followed.

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3 years ago

An example of a double reed musical instrument is the

Artist 52 [7]

Bassoon. Clarinet and saxophone are single reed and flute doesn't use reeds

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4 years ago

Read 2 more answers

If a person can run 10 km in 2 hours, what is the person’s speed? Include your work with your answer

Ivanshal [37]

Speed = Distance / Time
s = 10 / 2
s = 5 Km/h

In short, Your Answer would be 5 Km/h

Hope this helps!

8 0

3 years ago

Read 2 more answers

What is Arsenic cost per unit?

Phantasy [73]

Answer:

arsenic costs $320 per 100g

Explanation:

4 0

3 years ago

An unknown acid was titrated two times with 0.10 M NaOH. The first titration was done using an indicator to determine the equiva

Anit [1.1K]

Answer:

hello your question is incomplete attached below is the complete question

a) 0.12 M

b) Ka = 3.0 * 10^-7

c) Alizarin Yellow R

Explanation:

<u>A) Determine the concentration of the unknown acid</u>

The PH of the unknown acid before addition of NaOH is ; 3.72 ( weak acid )

First determine the moles of of NaOH

= molarity * volume

= 0.10 M * 30.0 ML = 0.0030 mol

at equivalence point

moles of NaOH = moles of unknown acid = 0.0030 mol

volume of unknown acid = 25.0 mL

Next calculate the concentration of the Acid ( HA )

= moles / volume

= 0.0030 mol / 25.0 mL

= 0.12 M

<u>b) Determine the Ka of the unknown acid </u>

attached below is the detailed solution

Ka = 3.0 * 10^-7

c) The indicator that would be a good choice to use in the titration of this acid with NaOH is ; Alizarin Yellow R . this is because the titration is between a strong base and a weak acid.

7 0

3 years ago