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
hoa [83]
3 years ago
5

ANSWER ASAP (20 POINTS)

Chemistry
1 answer:
SIZIF [17.4K]3 years ago
5 0

Answer:

a chemical formula

Explanation:

You might be interested in
Ok true or false
Misha Larkins [42]

Answer:

1.True

2.True

3.True

4. True

5. True

4 0
2 years ago
What features make a question scientific, and why are some questions beyond the boundaries of scientific investigation? Be sure
Pavel [41]
What makes a question scientific is that we are able to test our hypothesis.

For example:  Will increased sunlight cause more seeds to grow.  We can test that simply by placing seeds in the sun and some out of the sun.

If you cannot test an hypothesis, then it is NOT scientific

For example: Macroevolution isn't a scientific question because we cannot test whether or not complex organisms come from simpler organisms.  It can only be classified as an Hypothesis at best.
5 0
3 years ago
How many protons, neutrons, and electrons does cobalt-60 have? Is this a "normal" isotope of cobalt and how do you know?
liubo4ka [24]
Cobalt-60 has 27 protons (thus 33 neutrons). If an inter-nucleus neutron decays and emits an electron, this neutron transforms into a proton. Now we have 28 protons and 32 neutrons.
8 0
2 years ago
Given the following cations, list them in the expected order from smallest to largest: Y3+, Nb3+, Sb3+
Ugo [173]

<u>Answer:</u> Antimony ion is the smallest and yttrium ion is the largest.

<u>Explanation:</u>

Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.

An ion is formed when a neutral atom looses or gains electrons.

  • When an atom looses electrons, it results in the formation of positive ion known as cation.
  • When an atom gains electrons, it results in the formation of negative ion known as anion.

As moving from left to right in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Hence, the size of an atom decreases.

The size of the cation is small then their neutral atom because it has less number of electrons while its nuclear charge remains the same. Thus, the nucleus attracts the electron more towards itself and leads to the decrease in size.

We are given three cations:  Y^{3+},Nb^{3+}\text{ and }Sb^{3+}

Yttrium lies in Period 5, group 3 of the periodic table.

Niobium lie in Period 5, group 5 of the periodic table.

Antimony lies in Period 5, group 15 of the periodic table.

So, the order of atomic radii in increasing order follows:

Sb^{3+}

Hence, antimony ion is the smallest and yttrium ion is the largest.

6 0
2 years ago
What is the best explanation of the kinetic molecular theory as it relates to the energy of the molecules in the states of matte
lbvjy [14]
The answer is : A
----
20 * (273+100)/(273+22) = 25.3 L
4 0
3 years ago
Other questions:
  • How many moles of n are in 0.165 g of n2o?
    5·2 answers
  • Lithium carbonate, li2co3, contains 18.8 % lithium and is used in the treatment of mental illnesses such as bipolar disorder. wh
    12·1 answer
  • Explain how an automobile air bag protects the people in the car from being hurt as a result of impact
    14·1 answer
  • Why does spda fizz when you put a paper straw in it?
    5·1 answer
  • Why does the hull of an ocean -going ship rust quickly?
    12·1 answer
  • What is a cylinder? Give an example of an<br> object that's a cylinder.
    7·2 answers
  • Human diseases such as tetanus, syphilis, typhoid, and cholera are caused by small cells that lack a nucleus. These cells can en
    6·2 answers
  • Beer's Law states that A=ebc, where A is the absorbance, ε is the molar absorptivity of the solute, b is the path length, and c
    6·1 answer
  • How does the appear from earth
    13·1 answer
  • How many atoms of oxygen are contained in 160 grams if N2O3?​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!