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
tino4ka555 [31]
2 years ago
10

How many moles are in 20 grams of Ca (Calcium)? *

Chemistry
1 answer:
Flura [38]2 years ago
5 0

Answer:

0.49903 mol

Explanation:

You might be interested in
2) A balloon was inflated to a volume of 5.0 liters at a temperature of
TEA [102]

Answer:

6.12 L

Explanation:

Given that,

Initial volume, V₁ = 5 L

Initial temperature, T₁ = 7.0°C = 343 K

Final temperature, T₂ = 147°C = 420 K

We need to find its new volume. The relation between volume and temperature is given by :

\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{5\times 420}{343}\\\\V_2=6.12\ L

So, the new volume is 6.12 L.

8 0
2 years ago
Which kind of matter can be homogenous or heterogenous ?
Eduardwww [97]
A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. The three phases or states of matter are gas, liquid, and solid.
Hope this helps you!
5 0
3 years ago
Identify the cfc with the shortest atmospheric lifetime
goldenfox [79]
CFC-11 is typically the CFC with the shortest atmospheric lifetime. 
5 0
3 years ago
What is a small description of a atom
steposvetlana [31]

Answer:

An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. ... The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

4 0
3 years ago
Read 2 more answers
Of the following which element is the heaviest? helium argon lithium aluminum
Georgia [21]

Answer:

Lithium

Explanation:

it is the only metal listed.

5 0
3 years ago
Other questions:
  • The change from liquid to solid, or the reverse of melting, is calleda. condensation.
    9·1 answer
  • For heat transfer purposes, a standing man can be modeled as a 30-cm-diameter, 175-cm-long vertical cylinder with both the top a
    13·1 answer
  • Why can't all the mixtures be classified as solutions?
    13·1 answer
  • A tank contains 9000 L of pure water. Brine that contains 20 g of salt per liter of water is pumped into the tank at a rate of 2
    5·1 answer
  • Consider a transition of the electron in the hydrogen atom from n=3 to n=7.
    12·1 answer
  • The Ka1 value for oxalic acid is 5.9 x10-2 , and the Ka2 value is 4.6 x 10-5 . What are the values of Kb1 and Kb2 of the oxalate
    10·1 answer
  • What type of reaction is 3 and 4 ?
    11·2 answers
  • I will mark brainliest if all answered or if you don’t want to answer them all please just answer 9-15
    15·1 answer
  • What is the advantage of using Microsoft Excel to create a graph, as opposed to pen and paper?
    14·1 answer
  • The picture shows a model of a cell.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!