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anygoal [31]
3 years ago
6

What are the three properties of gems?

Chemistry
2 answers:
Temka [501]3 years ago
6 0
Crystal system
Hardness
Tenacity or Toughness
Rufina [12.5K]3 years ago
6 0
Refactive Index
Birefringence
Absorption
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: hydrochloric acid reacts with the mineral calcite to produce carbon dioxide gas, water, and calcium chloride. based on what yo
bearhunter [10]
Following three <span>things when applied could make the reaction to occur more quickly;

1) Increasing Temperature:
                                          Increase in temperature increases the Kinetic energy of molecules. This results in increase in the velocity and rate of collisions between reactants. Hence, greater the number of collisions between reactants per time greater will be the probability of formation of product per unit time.

2) Grinding Calcite:
                              Grinding of Calcium carbonate results in the increase of surface area of calcite. So greater the surface area greater is the exposure of Calcium carbonate to HCl molecules, hence the rate of formation of product increases.

3) Using Catalyst:
                            Very important. Catalyst when used decreases the activation energy and increase the rate of reaction by following methods.

                       a) Providing new pathway

                       b) weakening the bonds

                       c) providing surface area

                       d) holding up the reactant close to each other.</span>
8 0
3 years ago
Natural gas is a A. type of solar energy. B. type of electricity. C. nonrenewable resource. D. renewable resource.
rosijanka [135]

Answer:

C

Explanation:

Natural gas is a non renewable source of energy since it is a type of fossil fuel so it is a non renewable resource.

4 0
3 years ago
Propose a structure for an aromatic hydrocarbon, C9H12, that can form two C9H11Cl products on substitution of a hydrogen on the
Crank

Answer:

Explanation:

From the given study,

the molecular formula of the given aromatic compound = C9H12

the first process we suppose to carry out is to calculate the double bond equivalence.

So, the double bond equivalence DBE = {N_C+1-(\dfrac{(N_H+N_{Cl})-N_H}{2})  }

DBE = {9+1-(\dfrac{(12+0)-0}{2})  }

DBE = 4

Hence, the aromatic compound possesses 4 double bonds, this signifies that the might be a presence of benzene ring.

The substitutional products of the aromatic hydrocarbon C9H12 can be seen in the attached file below.

3 0
3 years ago
I need to know the measurements of this to the appropriate amount of significant figures
igor_vitrenko [27]

Answer:

it can be 63 or 63.5

Explanation:

7 0
3 years ago
Be sure to answer all parts. Determine the electron-group arrangement, molecular shape, and ideal bond angle for the following m
choli [55]

Answer:

trigonal planar

Explanation:

The molecule SO3 is of the type AX3. The molecule is symmetrical and non polar.

There are three regions of electron density in the molecule. This corresponds to a trigonal planar geometry. This means that the three oxygen atoms are arranged at the corners of a triangle.  The bond angle is 120 degrees.

7 0
3 years ago
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