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3 years ago

The repeating pattern of a mineral’s particles forms a solid called a(n)

Chemistry

2 answers:

natali 33 [55]3 years ago

8 0

Answer:

The answer is a

Explanation:

bazaltina [42]3 years ago

6 0

Crystalline solids are solids that have particles arranged in a regular, repeating patterns. They are held together by uniform intermolecular forces. The faces intersect at a specific angle that identifies that substance. They have distinctive internal structures that in turn lead to distinctive flat surfaces. These flat surfaces give a short rage order. When exposed to x – ray diffractometers, they exhibit a distinctive pattern used to identify the material. They give the same face when you turn a crystalline solid around. The answer is crystal.

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Which of the following does NOT demonstrate the law of conservation of matter?

Brrunno [24]

The one that does not demonstrates the law of conservation of matter would be the third option: $2NO_2 + H_2O -- > HNO_3 + HNO_2$

<h3>What is law of conservation of matter? </h3>

It is a law that explains that matters are conserved during the course of chemical reactions. They can neither be destroyed nor created.

Thus, the number of moles of the species in a reaction remains the same before and after the reaction.

Thus, an equation that demonstrates the law of conservation of matter will be balanced in terms of the number of moles of species.

The only equation, in this case, is $2NO_2 + H_2O -- > HNO_3 + HNO_2$

There are 3 oxygen species on the reactant while 5 are present on the product side.

More on the law of conservation of matter can be found here: brainly.com/question/9434062

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8 0

2 years ago

A strand of hair is approximately 50 μm thick. If the diameter of an atom is 1 × 10-10 m, how many atoms thick is a strand of ha

Kazeer [188]

Thickness of strand hair = 50 μm

Diameter of an atom = $1 \times 10^{-10} m$

Now, with the help of conversion factors, convert thickness in micrometer into meter i.e. 1 micrometer = $10^{-6}m$

So, thickness of strand hair =50 μm= 50 \times 10^{-6} m

Therefore,

number of atoms thick is a strand of hair = $50 \times 10^{-6}m\times \frac{1 atom}{1 \times 10^{-10}m}$

= $50\times 10^{4}atoms$

Hence, number of atoms is $50\times 10^{4}atoms$ thick is a strand of hair.

6 0

3 years ago

Read 2 more answers

BRAINLIEST TO CORRECT please answer part A, B, and C

Alenkinab [10]

Answer:

1. density and composition

2. seismic waves

3.mantle

1. lithosphere

2. asthenosphere

3. mantle

4. outer core

5. inner core

box a I think

8 0

2 years ago

A constant-volume calorimeter was calibrated by carrying out a reaction known to release 3.50 kJ of heat in 0.200 L of solution

Dmitrij [34]

Answer:

The change in internal energy is - 1.19 kJ

Explanation:

Step 1: Data given

Heat released = 3.5 kJ

Volume calorimeter = 0.200 L

Heat release results in a 7.32 °C

Temperature rise for the next experiment = 2.49 °C

Step 2: Calculate Ccalorimeter

Qcal = ccal * ΔT ⇒ 3.50 kJ = Ccal *7.32 °C

Ccal = 3.50 kJ /7.32 °C = 0.478 kJ/°C

Step 3: Calculate energy released

Qcal = 0.478 kJ/°C *2.49 °C = 1.19 kJ

Step 4: Calculate change in internal energy

ΔU = Q + W W = 0 (no expansion)

Qreac = -Qcal = - 1.19 kJ

ΔU = - 1.19 kJ

The change in internal energy is - 1.19 kJ

4 0

3 years ago

Convert 5.50 mol of MgO to g.

Fiesta28 [93]

Answer:

5.50 moles of magnesium oxide is 221.6742 grams

Explanation:

to do this you multiply the number of moles by the molar mass

7 0

1 year ago