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
hammer [34]
3 years ago
8

From where do the gems used in Jewlery come? A. they are mettallic ore B.they are nonmettallic silicates C. they are mettallic m

inerals D. they are non mettallic minerals.
Chemistry
2 answers:
mixas84 [53]3 years ago
6 0
The answer is D, because gems are usually not mettallic
UkoKoshka [18]3 years ago
5 0
Gems used in jewelry come are Non metallic minerals. So it would be D hope this helps!
You might be interested in
True or false questions?
egoroff_w [7]

Answer:

1. False 2.True3.True? Unsure

Explanation:

8 0
3 years ago
Atoms of element X weigh 32 times more than atoms of element Y. A compound has the formula: XY2 The ratio of the mass of X to th
tamaranim1 [39]

Answer:

16:1

Explanation:

Atoms of element X weigh 32 times more than atoms of element Y. We can write this in a symbolic way.

mX = 32 mY   [1]

where,

  • mX and mY are the masses of X and Y, respectively

A compound has the formula: XY₂, that is, in 1 molecule of XY₂ there is 1 atom of X and 2 atoms of Y. The ratio of the mass of X to the mass of Y in this compound equals:

mX/2 mY  [2]

If we substitute [1] in [2], we get:

mX/2 mY = 32 mY/2 mY = 16 = 16:1

4 0
3 years ago
Which of the following are examples of chemical changes? Select all that apply.
Natali5045456 [20]

Answer:

b. milk spoiling and c. firecrackers exploding

Explanation:

These are both chemical changes, the composition of them change when this happens and it cannot be reversed

6 0
2 years ago
Which of these is a reason an engineer may choose to use a prefabricated
Maksim231197 [3]

Answer:

B.

Explanation:

customization requires more material, more machine time which can creates a greater impact on the environment in the sense of pollution (travel by the extra employees, creation of custom materials, increased machine running time). Good luck in your studies. Hope this answers your question in full.

7 0
2 years ago
Which chemical formula corresponds to this structural formula? c6h6h6h2 c14h6 c6h12 c6h14
Alexxandr [17]

The chemical formula C₂H₆O, which is designated as option D, is equivalent to this structural formula.

<h3><u>What is a Chemical Formula ?</u></h3>

Chemical element symbols, numbers, and occasionally additional symbols like parentheses, dashes, brackets, commas, and plus (+) and minus () signs are used in a chemical formula to represent information about the chemical proportions of the atoms that make up a certain chemical compound or molecule.

  • An empirical formula represents by symbols, such as Na for sodium and Cl for chlorine, with subscripts that show the relative number of atoms in each.
  • The composition of any member of an entire class of compounds can be represented by a general formula, a sort of empirical formula.

To know more about Chemical formulas, refer to:

brainly.com/question/26388921

6 0
1 year ago
Read 2 more answers
Other questions:
  • What is true about energy?
    6·2 answers
  • Use the electronegativities in the periodic table above to determine which bonding pair forms polar covalent bonds.
    11·1 answer
  • 5. What evidence is there that marker ink is a mixture?
    15·1 answer
  • What is the specific heat capacity of a metal if it requires 177.5 J to change the temperatures of 15.0g of the metal from 25.00
    11·1 answer
  • What is the density of helium in grams per liter?
    9·1 answer
  • what is an empirical formulaWhat is the percent composition by mass of nitrogen in (NH4)2CO3 (gram-formula mass = 96.0 g/mol)?
    7·1 answer
  • If you connect a solid piece of copper with a solid piece of zink using only a wire electrons will flow from the zinc to the cop
    9·1 answer
  • Set up the ion formation equations, with ionization energy values for each electron in the valence layer, of the atoms of the ch
    10·1 answer
  • Difference between acids and bases in terms of ions
    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!