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kari74 [83]
3 years ago
12

Can someone help me with these. I don’t understand how to answer them or do the work

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
6 0
How am I supposed to help you if there's not picture of what the problem is
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What is the identity of the element whose isotopes you have selected
Pachacha [2.7K]

Answer:

Rubidium

Explanation:

Nil

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Questioned document examiners prefer to work with copies of a questioned document in order to avoid damage to the original
gladu [14]
I think it is a False
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Which statement is true for a solution when its concentration of hydroxide ions increases? It becomes more acidic. It becomes le
makvit [3.9K]

Answer:

Its pH value increases.

Explanation:

pH is the measure of alkalinity or acidity of a compound.

pH = - log [H+]

and pH + pOH = 14

where pOH is the measure of basicity of a solution, given by -log[OH-]

As a solution gets more basic that is higher [OH-], the pH increases, and on the other hand, as the pH of a solution decreases by one pH unit, the concentration of H+ increases by ten times.

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3 years ago
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What has to be true about available resources for competition to exist?
Mila [183]

Answer:

Limited

Explanation:

For competition to exist within a population or between population, shared or common resources that organisms holds very important must be very limited and scared.

Competition is a struggle between organisms for limited resources in the ecosystem.

  • It is an interaction between organisms in which one of them is harmed.
  • Competition originates from limited supply of shared or mutual resources among organisms.
  • When competition is between organisms from different population, it is called an interspecific competition.
  • Competition between organisms within the same population, i.e of the same species is intraspecific competition.
8 0
3 years ago
How many moles of calcium chloride are contained in a 333 gram sample?
Bogdan [553]

Answer & Explanation:

The molar mass of calcium chloride is 110.98 g/mol. We can use this information to solve this problem. We can set up our equation like this..

\frac{333 g(CaCl2)}{} *\frac{1mol(CaCl2)}{110.98g(CaCl2)}

Multiply straight across on the top and straight across on the bottom.

\frac{333}{110.98}

Now divide.

\frac{333}{110.98}=3.00

So, there are 3.00 moles of calcium chloride contained in a 33 gram sample which is answer choice D.

6 0
3 years ago
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