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lys-0071 [83]
3 years ago
3

Which is the first step that geologists must do to compare rock layers at distant locations?

Chemistry
1 answer:
KonstantinChe [14]3 years ago
3 0

Answer: Comparing rock layers in distant places can be a challenge for geologists since these layers may have different environmental factors that caused different transformations in them.

Therefore, when it is necessary to establish a comparison between layers of rocks in different ligands, geologists must establish steps to make an efficient comparison and have results consistent with reality. To do this, they must first compare a layer in one location with layers in other locations, assign relative age to a layer in one location, and identify index fossils in one or more layers in one location.

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Which of the following measurements has three significant figures?
horsena [70]

Answer:

01.02 × 10⁻³g has 3 significant figures.

Explanation:

01.02 × 10⁻³g has 3 significant figures because all non-zero figures are significant, all zeros in between numbers are significant, and all zeros before or after (unless there is a decimal point before) are not significant.

3 0
3 years ago
Which statement about liquid state of matter is true?
serious [3.7K]
The answer is A! Let me know if I was correct
4 0
4 years ago
A metal atom loses electrons from its outermost energy level and acquires a (positive) or (negative) charge. These electrons joi
larisa [96]

acquires a positive charge

electrically (neutral)

5 0
3 years ago
I am so lost, and suggestions to how I can solve this?
Ad libitum [116K]
<h3>Answer:</h3>

165.078 g

<h3>Explanation:</h3>

<u>We are given;</u>

  • Specific heat capacity of nickel as 0.446 J/g°C
  • Initial temperature of nickel is 255.5 °C
  • Mass of water in the calorimeter is 250.0 g
  • Initial temperature of water is 20° C
  • Final temperature of the mixture is 35.5°C
  • Specific heat capacity of water is 4.18 J/g°C

We are required to calculate the mass of nickel sample;

<h3>Step 1: Calculate the amount of heat absorbed by water.</h3>

We know that quantity of heat absorbed, Q = m × c × ΔT

Change in temperature, ΔT = 35.5°C - 20°C

                                              = 15.5 °C

Therefore, Q = 250 g × 4.1 J/g°C × 15.5° C

                     = 16,197.5 Joules

<h3>Step 2: Calculate the amount of heat released by nickel sample</h3>

Assuming the mass of nickel sample is m

Then, Heat released, Q = m × c × ΔT

Change in temperature, ΔT = 255.5 °C - 35.5 ° C

                                              = 220 °C

Q = m × 0.446 J/g°C × 220° C

   = 98.12m joules

<h3>Step 3: Determine the mass of nickel sample</h3>

We know that the amount of heat absorbed is equivalent to amount of heat released.

That is, Quantity of heat absorbed = Quantity of heat released

Therefore;

98.12 m joules = 16,197.5 Joules

    m = 165.078 g

Thus, the mass of nickel sample is 165.078 g

8 0
4 years ago
Determine the final concentration when 250mL of 3M solution is dilluted to a final volume of 850mL. (Enter Number)​
LenKa [72]

Answer:

M₂ = 0.9 M

Explanation:

Given data:

Initial Volume = V₁ = 250 mL

Initial molarity = M₁= 3 M

Final volume = 850 mL

Final molarity = ?

Solution:

M₁V₁ = M₂V₂

M₂ = M₁V₁ /V₂

M₂ = 3 M × 250 mL / 850 mL

M₂ = 750 M / 850

M₂ = 0.9 M

7 0
4 years ago
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