<u>Answer:</u>
<em>B. topaz and quartz</em>
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<u>Explanation:</u>
Hardness of a mineral is measured using Moh’s scale.
Hardness depends on the bonding attraction between the atoms and the size of the atoms present in the mineral
<u>Mineral</u> <u>Hardness(Moh’s)
</u>
Talc 1
Gypsum 2
fluorite 4
Apatite 5
Topaz 8
quartz 7
Corundum 9
Diamond 10
<em>Option B topaz and quartz is the Answer
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We see that the molar ratio of sulfur to water is:
3 : 2
We first compute the moles of water:
moles = mass / Mr
moles = 37.4 / 18
moles = 2.08
By the ratio, moles of sulfur:
3.12
Mr sulfur = 64
mass = 3.12 x 64
mass = 199.7 grams
Answer:
The average atomic mass is 86.565
Explanation:
An element's average atomic mass is the sum of the products of the masses of the isotopes of the element and their percentage abundance divided by 100
The average atomic mass of the Element X is given as follows;
Isotope type 1 (85.91) ×
Isotope Abundance (%) Mass /100 Portion of average mass
Type 1 67.25 × 85.91 ÷ 100 57.774475
Type 2 32.75 × 87.91 ÷ 100 28.790525
Average atomic mass = 86.565
The average atomic mass = 86.565.
Answer:
a risk to human health or the environment arising from biological work, especially with microorganisms.
Explanation:
Answer:
BaF2(s) ------> Ba2 (aq) + 2F- (aq)
Explanation:
Entropy refers to the degree of disorderliness in a system. Processes that lead to greater disorderliness in a system are said to increase the entropy of the system or lead to a positive value of ΔS.
If we consider the process, BaF2(s) ------> Ba2 (aq) + 2F- (aq), we will notice that ions were produced in solution thereby increasing the disorderliness of the system.