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pishuonlain [190]
3 years ago
8

A U-shaped valleys most often formed by what a) volcanoes b) oceans waves c) plate movement d) glacial movement

Chemistry
1 answer:
Anon25 [30]3 years ago
8 0

Answer:

D. Glacial movement

Explanation:

Glaciers are very large and carve a U shape into the ground.

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Francine makes several measurements of the mass of a metal block. The data set is shown in the table below. Measurement Mass of
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The characteristic being calculated here is the mean or the average of the data set.
To check:
(20.73 + 20.76 + 20.68 + 20.75)/4 [we divide it by 4 because there are 4 numbers]
= 82.92 / 4
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3 years ago
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During a lab activity, students prepared two solutions separately at the same temperature. Later they mixed the solutions and th
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This at be due to a chemical change. For example, when some chemical elements mix, the change causes heat. This is the same, but the opposite. Hope this helps!
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3 years ago
. Metallic iron has a body-centered cubic lattice with all atoms at lattice points and a unit cell whose edge length is 286.6 pm
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Answer:

\large \boxed{\text{55.8 u}}

Explanation:

1. Calculate the volume of the unit cell

V = l³ = (2.866 × 10⁻⁸ cm)³ = 2.354 × 10⁻²³ cm³

2. Calculate the mass of a unit cell

\text{Mass} = 2.866 \times 10^{-23}\text{ cm}^{3} \times \dfrac{\text{7.87 g}}{\text{1 cm}^{3}} = 1.853 \times 10^{-22} \text{ g}

3. Calculate the mass of one atom

A body-centred unit cell contains two atoms.

\text{Mass of 1 atom} = \dfrac{1.853 \times 10^{-22} \text{ g}}{\text{2 atoms}} \times \dfrac{\text{1 u}}{1.661 \times 10^{-24}\text{ g}} = \textbf{55.8 u}\\\\\text{The molar mass of Fe from the Periodic Table is $\large \boxed{\textbf{55.845 g/mol}}$}

6 0
3 years ago
Analyze the food web. If the frog population decreases, what impact will this likely have on the food web?
sergiy2304 [10]

Answer:

the population of grasshoppers will decrease

Explanation:

a food source is becoming more and more limited thus, its predator will also start to die out due to starvation

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Which question can be answered using the scientific method ?
anyanavicka [17]
The correct answer is D because the the rest will have different answers depending on the person you ask. D can be proven with facts by research
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