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
Norma-Jean [14]
4 years ago
5

We use the periodic table to determine a mineral’s hardness true or false

Chemistry
2 answers:
Ray Of Light [21]4 years ago
6 0
False we use it to determine what type of element it is as well as the atomic mass and number
Bas_tet [7]4 years ago
3 0
False we use it to detirmine the reactivitys and what groups they are in
You might be interested in
Can someone help me with #35,37,39,41 please
adoni [48]
35 b.
37 h
39 i
41 d
hope that helps
4 0
3 years ago
NEED HELP FAST
Blababa [14]

Answer: 1. Ethylene is a stable molecule with two carbon atoms connected by a double bond. Polyethylene is made by the reaction of multiple ethylene molecules in the presence of a catalyst.

2. The term “plastics” includes materials composed of various elements such as carbon, hydrogen, oxygen, nitrogen, chlorine, and sulfur.

3. Polyethylene (PE) is made by the reaction of multiple ethylene molecules in the presence of catalysts to break the double bond and connect the carbon atoms into a chain . The longer the chain, the higher the molecular weight. Polymers can have molecular weights in the millions.

Explanation:

6 0
3 years ago
Who tryna date? like ong
Elanso [62]

Answer:

Im confused. Do you need help with something?

Explanation:

4 0
3 years ago
Read 2 more answers
t 745 K, the reaction below has an equilibrium constant (Kc) of 5.00 × 102. H2 (g) + I2 (g) ⇌ 2 HI (g) If a mixture of 0.10 mol
spayn [35]

Answer : The concentration of HI (g) at equilibrium is, 0.643 M

Explanation :

The given chemical reaction is:

                        H_2(g)+I_2(g)\rightarrow 2HI(g)

Initial conc.    0.10        0.10      0.50

At eqm.        (0.10-x)  (0.10-x)   (0.50+2x)

As we are given:

K_c=5.00\times 10^2

The expression for equilibrium constant is:

K_c=\frac{[HI]^2}{[H_2][I_2]}

Now put all the given values in this expression, we get:

5.00\times 10^2=\frac{(0.50+2x)^2}{(0.10-x)\times (0.10-x)}

x = 0.0713  and x = 0.134

We are neglecting value of x = 0.134 because the equilibrium concentration can not be more than initial concentration.

Thus, we are taking value of x = 0.0713

The concentration of HI (g) at equilibrium = (0.50+2x) = [0.50+2(0.0713)] = 0.643 M

Thus, the concentration of HI (g) at equilibrium is, 0.643 M

8 0
3 years ago
What mass of carbon dioxide can be produced from 4 moles of sodium bicarbonate according to the following unbalanced reaction,
KonstantinChe [14]
The answer is on the paper

6 0
3 years ago
Other questions:
  • Who is interested in a middle schooler?
    12·1 answer
  • Does data from mass spectrometry indicate that modern scientists have made modifications to Dalton''s model? Justify.
    8·1 answer
  • The electronic configuration of phosphorous is 2.8.5. Explain, in terms of its electronic configuration, why phosphorus is in gr
    14·1 answer
  • What type of pressure would you expect to find at the equator?
    7·1 answer
  • Select the correct answer.
    5·1 answer
  • 1. Identify the atom in that has the greater ionization energy.<br> A. Calcium Ca<br> B. Barium Ba
    6·2 answers
  • 454 grams of isomaltitol, C12H24O11, was combusted in a furnace completely in an excess oxygen. The products of this reaction ar
    6·1 answer
  • Write the formula, substitute and solve to the nearest tenth.
    10·1 answer
  • (06.04 HC)
    6·1 answer
  • What does it mean to be in the path of totality?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!