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Scorpion4ik [409]
3 years ago
11

QUESTION 1

Chemistry
2 answers:
zhenek [66]3 years ago
6 0
1. Triassic
2. eon > era > period
3. The scientists study fossils and rock layers to find major changes.
otez555 [7]3 years ago
3 0
1. Terrassic:  <span>Relating to or denoting the earliest period of the Mesozoic era, between the Permian and Jurassic periods.
2. E</span>on > Era > Period:  An Eon is a large amount of time, An Era is <span>a long and distinct period of history, A length of time.
3. Scientists define the segments of the geological time scale by studying fossil and rock layers for major changes.</span>
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An experiment is carried out to determine how different pH values of soil will affect the growth of tomato
Aleks [24]

Answer:

How high the plants grow in the different soils.  

Explanation:

The dependent variable is what happens as a result of what the experimenter changes.  

The experimenter could measure how high the plants grow when placed in soil with different pH values.

5 0
4 years ago
A topographical map of a section of Charleston, SC is shown. What feature is located at the dot marked with an X? A) the center
Effectus [21]
It seems that you have missed the given image to answer this question. But anyway, I found it and got the answer. Based on the  topographical map of a section of Charleston, SC, the feature that is <span>located at the dot marked with an X is the high point of a hill. The answer would be option D.</span>
6 0
3 years ago
How much of a 0.250 M lithium hydroxide is required to neutralize 20.0 mL of 0.345M chlorous acid?
Bumek [7]

Answer:

27.6mL of LiOH 0.250M

Explanation:

The reaction of lithium hydroxide (LiOH) with chlorous acid (HClO₂) is:

LiOH + HClO₂ → LiClO₂ + H₂O

<em>That means, 1 mole of hydroxide reacts per mole of acid</em>

Moles of  20.0 mL = 0.0200L of 0.345M chlorous acid are:

0.0200L ₓ (0.345mol / L) = <em>6.90x10⁻³ moles of HClO₂</em>

To neutralize this acid, you need to add the same number of moles of LiOH, that is 6.90x10⁻³ moles. As the LiOH contains 0.250 moles / L:

6.90x10⁻³ moles ₓ (1L / 0.250mol) = 0.0276L of LiOH =

<h3>27.6mL of LiOH 0.250M</h3>
6 0
3 years ago
Which statement is true about a polyatomic ion?
Charra [1.4K]
<span>Among the given choices, which among them tells us the truth about the polyatomic ion. The polyatomic ions are charged molecules or formula units that are composed of many atoms. From the given choices, the answer would be letter C. It is made of atoms that are covalently bonded together. When we say covalently bonded, the atoms are shared among the atoms composing the formula unit. </span>
5 0
3 years ago
Read 2 more answers
How many atoms of oxygen are in 5Li2SO4
olga55 [171]

Answer:

20 oxygen atoms

Explanation:

Li2SO4 has 4 oxygen atoms, so if there are 5 of that compound then there will be 20 oxygen atoms.

8 0
3 years ago
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