1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vitfil [10]
3 years ago
11

100 pts, 4 questions I am having issues answering

Chemistry
2 answers:
Damm [24]3 years ago
6 0

Answer:

17. The iron metal is oxidized to form the iron oxide known as rust.

19.A saturated solution will not dissolve any more solute and any extra solute added will simply stay as it is, without dissolving. An unsaturated solution has less solute than its solubility and hence can still add more solute, till it reaches the saturation level.

26 An Overflowing Population. The swelling American population played a large part in the decision Americans made to head, The Government Opens Up New Land. The American government itself encouraged its citizens to move west

32. The periodic table was first assembled in 1869 by a Russian chemist named Dmitri Mendeleev. He came up with a way of organizing the elements that were known at the time, arranged them in order of atomic weight, and then grouped them into rows and columns based on their chemical and physical properties. Here is a unique "Mayan" format Periodic Table. Elements in the same group are those that are in a single vertical line from top to bottom. They have the most in common between the two directions. They share the same number of electrons in their valence subshells.

Explanation:

Anestetic [448]3 years ago
5 0

17. The iron metal is oxidized to form the iron oxide known as rust.

19.A saturated solution will not dissolve any more solute and any extra solute added will simply stay as it is, without dissolving. An unsaturated solution has less solute than its solubility and hence can still add more solute, till it reaches the saturation level.

26 An Overflowing Population. The swelling American population played a large part in the decision Americans made to head, The Government Opens Up New Land. The American government itself encouraged its citizens to move west

32. The periodic table was first assembled in 1869 by a Russian chemist named Dmitri Mendeleev. He came up with a way of organizing the elements that were known at the time, arranged them in order of atomic weight, and then grouped them into rows and columns based on their chemical and physical properties. Here is a unique "Mayan" format Periodic Table. Elements in the same group are those that are in a single vertical line from top to bottom. They have the most in common between the two directions. They share the same number of electrons in their valence subshells.

You might be interested in
atch: Substance ....... Definition fill in the blank 1 Lewis acid A. Provides H in water fill in the blank 2 Bronsted-Lowry base
Grace [21]

A Lewis acid is an electron-pair acceptor.

Bronsted-Lowry bases are species that can accept a proton.

Arrhenius acid gives H^{+} ions.

<h3>What is acid?</h3>

An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions (acid catalysis).

A Lewis acid is therefore any substance, such as the H^+ion, that can accept a pair of nonbonding electrons.  In other words, a Lewis acid is an electron-pair acceptor.

Bronsted-Lowry bases are species that can accept a proton due to a high-energy pair of electrons being present.

According to Arrhenius, the acids are the hydrogen-containing compounds which give H^+ ions or protons on dissociation in water and bases are the hydroxide compounds which give OH^- ions on dissociation in water.

Learn more about acid here:

brainly.com/question/3700851

#SPJ1

4 0
2 years ago
Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom has a mass of 130.906114 amu.
Vera_Pavlovna [14]

Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom has a mass of 130.906114 amu.

<h3>What is thyroid cancer?</h3>

Cancer that originates in the tissues of the thyroid gland is known as thyroid cancer. It is a condition where cells develop improperly and are susceptible to spreading to different bodily regions. A bump in the neck or swelling are examples of symptoms. Thyroid cancer is not always diagnosed because it can move from other parts of the body to the thyroid.

Young age radiation exposure, having an enlarged thyroid, and family history are risk factors. Papillary thyroid cancer, follicular thyroid cancer, medullary thyroid cancer, and anaplastic thyroid cancer are the four primary kinds. Ultrasound and tiny needle aspiration are frequently used in diagnosis. As of right now, it is not advised to screen those who are healthy and at normal risk for the disease.

To learn more about thyroid cancer from the given link:

brainly.com/question/11880360

#SPJ4

4 0
2 years ago
The Henderson-Hasselbalch equation relates the pH of a buffer solution to the pKa of its conjugate acid and the ratio of the con
Kobotan [32]

Answer:

The correct answer is 190.5 mL of 1.00 M KH₂PO₄

Explanation:

A phosphate buffer is composed by phosphate acid (KH₂PO₄) and its conjugated base (K₂HPO₄). To obtain the relation between the concentrations of base and acid to add, we use Henderson-Hasselbach equation:

pH= pKa + log \frac{base}{acid}

We have: pH= 6.97 and pKa= 7.21. So, we replace the values in the equation:

6.97= 7.21 + log \frac{base}{acid}

6.97-7.21= log \frac{base}{acid}

-0.24= log \frac{base}{acid}

10^{-0.24}= \frac{base}{acid}

0.575 = \frac{base}{acid}

\frac{0.575}{1}= \frac{base}{acid}

It means that you have to mix a volume 0.575 times of conjugated base and 1 volume of acid. If we assume a total buffer concentration of 1 M, we have:

base + acid = 1

base= 1 - acid

We replace in the previous equation:

0.575= \frac{1-acid}{acid}

0.575 acid= 1 - acid

0.575 acid + 1 acid= 1

1.575 acid = 1

acid= 1/1,575

acid= 0.635

base= 1 - acid = 1 - 0.635 = 0.365

For a total volume of 300 ml, the volumes of both acid and base will be:

300 ml x 0.635 M = 190.5 ml of acid (KH₂PO₄)

300 ml x 0.365 M= 109.5 ml of base (K₂HPO₄)

We can corroborate our calculations as follows:

190.5 ml + 109.5 ml = 300 ml

109.5 ml / 190.5 ml = 0.575

4 0
3 years ago
8. What do you believe: should husbands make decisions for their
Sedaia [141]

Answer:

I personally don't think that they should because women are perfectly capable of making our own decisions.

Explanation:

hope this helps

7 0
3 years ago
Oxygen and hydrogen form the polyatomic hydroxide ion. What is its charge?
prohojiy [21]

Answer:

negative

the chage on hydroxide ions os negative

4 0
3 years ago
Read 2 more answers
Other questions:
  • Whitch of the following is a true statement about the magnetic field between two magnets
    6·1 answer
  • a solution has a volume of 2.0L and contains 36.0 g of glucose. If the molar mass of glucose is 180 g/mol, what is the morality
    11·1 answer
  • A 1.2 kg block of iron at 32 ∘C is rapidly heated by a torch such that 12 kJ is transferred to it. What temperature would the bl
    9·1 answer
  • Oxidation-reduction is often the most confusing and abstract part of chemistry for first-time chemistry students. Is it really w
    7·1 answer
  • Making an apple pie calls for a reaction among certain ratios of ingredients. How is making an apple pie different from making l
    14·1 answer
  • How many grams are in 3.58 x 10^23 molecules of dicarbon hexahydride?
    10·1 answer
  • Write the net ionic equation for the reaction that occurs when equal volumes of 0.080 M aqueous acetic acid and sodium nitrite a
    12·1 answer
  • A mixture initially contains A, B, and C in the following concentrations: [A] = 0.350 M , [B] = 0.650 M , and [C] = 0.300 M . Th
    11·1 answer
  • Martin slowly pours an unknown liquid into a container that originally had some water in it. He is measuring the temperature in
    8·2 answers
  • The reaction of nitrogen with methane in excess oxygen produces water, ________, and ___________. N2(g) + O2(g) + CH4(g) → CO2(g
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!