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Mama L [17]
3 years ago
9

Once again rocks and/or minerals

Chemistry
2 answers:
emmasim [6.3K]3 years ago
6 0

Answer:

Luster, hardness , colour , clevage and magnetism

Explanation:

1. Luster makes sure the light is reflected by the mineral.

2. On the 10-point Mohs scale, which is basically a scratch test, hardness is measured. Take an unidentified mineral and scrape it like a fingernail with an object of known hardness.

3. Zurite, for instance, is often a deep blue, and malachite is gray.

4. In minerals that appear to divide along one or more flat surfaces or planes, cleavage may be observed.

5. Magnetite, for instance, has a heavy pull that even weak magnets can draw. But there is only a poor attraction to other minerals, particularly chromite (a black oxide) and pyrrhotite (a bronze sulfide.)

sergeinik [125]3 years ago
5 0

Answer:

you can classify a mineral by its appearance and other properties. The presence of a mineral is defined by the color and luster, and the color of the powdered mineral is described by the band. Every mineral has a distinctive density. To compare the hardness of rocks, the Mohs Hardness Scale is used.

Explanation:

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Baking soda (NaHCO3) and vinegar (HC2H3O2) react to form sodium acetate, water, and carbon dioxide. If 42.00 g of baking soda re
Setler [38]

Answer:

0.5 mole of CO₂.

Explanation:

We'll begin by calculating the number of mole in 42 g of baking soda (NaHCO₃). This can be obtained as follow:

Mass of NaHCO₃ = 42 g

Molar mass of NaHCO₃ = 23 + 1 + 12 + (16×3)

= 23 + 1 + 12 + 48

= 84 g/mol

Mole of NaHCO₃ =?

Mole = mass / molar mass

Mole of NaHCO₃ = 42/84

Mole of NaHCO₃ = 0.5 mole

Next, balanced equation for the reaction. This is given below:

NaHCO₃ + HC₂H₃O₂ → NaC₂H₃O₂ + H₂O + CO₂

From the balanced equation above,

1 mole of NaHCO₃ reacted to produce 1 mole of CO₂

Finally, we shall determine the number of mole of CO₂ produced by the reaction of 42 g (i.e 0.5 mole) of NaHCO₃. This can be obtained as follow:

From the balanced equation above,

1 mole of NaHCO₃ reacted to produce 1 mole of CO₂.

Therefore, 0.5 mole of NaHCO₃ will also react to produce 0.5 mole of CO₂.

Thus, 0.5 mole of CO₂ was obtained from the reaction.

7 0
3 years ago
Read the passage.
RSB [31]

Answer:

the narrator and the newsies

7 0
3 years ago
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Which of the following has a relationship with amplitude in waves? *
Natasha2012 [34]

Answer:

energy

Explanation:

The amount of energy carried by a wave is related to the amplitude in waves.

6 0
3 years ago
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Most substances become less dense as the temperature increases. Which substance is an exception to this rule
stealth61 [152]
The substance is water
6 0
4 years ago
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Given the reaction represented by the balanced equation:
user100 [1]

Answer:

mass of CHF_3 = 1/3 \times 9.47 \times 70 =220.97g

Explanation:

CH_4(g)+3F_2(g)->3HF(g)+CHF_3

As given in the question that methane(CH_4) is taken excess amount

mass of CHF_3 depend only on mass of fluorine

mass of F_2 =180 g

mole of F_2=\frac{180}{19} =9.47

3 mole of F_2 gives 1 mole of CHF_3

so 1 mole will give \frac{1}{3} mole of CHF_3

therefore,

9.47 mole of F_2 will give \frac{1}{3}  \times 9.47 mole of CHF_3

mass of CHF_3 = 1/3 \times 9.47 \times 70 =220.97g

7 0
3 years ago
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