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
Natalija [7]
3 years ago
10

Help me with this question!!

Chemistry
1 answer:
skelet666 [1.2K]3 years ago
8 0
Nitrogen is ...19.7
flourine is 80.3...
hope this helps!
You might be interested in
What is the percent composition by mass of each element in Co(HSO4)2?
MrRissso [65]

Answer:

54.1 % Ca, 43.2 % O, 2.7% H

Explanation:

Molecular formula for calcium hydroxide is Ca(OH)₂

As we don't have a mass of Ca(OH)₂ to find out the percentage composition, we consider that the question refers to 1 mol of compound.

1 mol of hydroxide weighs 74.08 g

1 mol of hydroxide has 1 mol of Ca, therefore 40.08 g are Ca

2 moles of O therefore 32g are O

2 moles of H therefore 2 g are H

Percentage composition is known as (Mass of element/Total mass) . 100

(40.08 / 74.08) . 100 = 54.1 %

(32 / 74.08) . 100 = 43.2 %

(2 / 74.08) . 100 = 2.7%

im a smart one

7 0
3 years ago
UU
BigorU [14]

Answer:

Samarium

Explanation:

The element Sm describe is called Samarium. This element has unique sets of properties that makes it very unique and distinct.

The lanthanides are found in the f-block on the periodic table of elements.

This element is a moderately hard silvery metal that readily oxidizes in air. It assumes an oxidation state of +3. The element has an atomic number of 62

7 0
3 years ago
What is the electron configuration of an electrically neutral alkaline earth metal? please explain​
vlabodo [156]

Answer:

The elements in Group 2 (beryllium, magnesium, calcium, strontium, barium, and radium) are called the alkaline earth metals (see Figure below). These elements have two valence electrons, both of which reside in the outermost s sublevel. The general electron configuration of all alkaline earth metals is ns

8 0
3 years ago
In preparing your soap, you dissolved 12.5 g of sodium hydroxide in 32.0 mL of de-ionized water. Your product was a solid cake o
Aleksandr [31]

Explanation:

The generated Na+ and OH-ions are immediately surrounded by molecules of water (typically 6, each). There is the development of the exothermic hydration sphere for each ion. It seems as though there is negative overall energy of dissolving solid NaOH.

Now, since this dissolution is exothermic the temperature of the mixture rises.

4 0
3 years ago
Two characteristics used to classify igneous rocks are texture and
kykrilka [37]
<span>Two characteristics used to classify igneous rocks are texture and </span>Mineral Grains

8 0
3 years ago
Read 2 more answers
Other questions:
  • If an unknown quantity of gas is held at a temperature of 789 K in a container with a volume of
    12·1 answer
  • Given 1kg=2.20 lbs, how many kilograms are in 125 lbs?<br> (Metric conversion)
    14·1 answer
  • Place the following atmospheric gases in order of abundance, from highest to lowest.
    9·1 answer
  • What is the one variable that is changed in the experimental group called? the placebo the independent variable the control grou
    8·1 answer
  • Determine the number of unpaired electrons expected for [Fe(NO2)6]3−and for [FeF6]3− in terms of crystal field theory.
    13·1 answer
  • CO2+2H2O=H3O^++HCO3^-
    11·1 answer
  • Question 3
    7·1 answer
  • The Sun is the key driving force of weather and climate. Which of the following is true regarding how weather and climate compar
    12·2 answers
  • Which sentence describes the energy changes that occur when a chemical reaction happens?
    15·1 answer
  • Explain why the middle portion of ship shows more rust than either the top most or the bottom most part ​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!