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navik [9.2K]
2 years ago
13

Which of these pairs of elements have the same number of valence electrons?​

Chemistry
1 answer:
photoshop1234 [79]2 years ago
8 0
I need a picture because I don’t know what this is talking about
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The specific heat of silver is 0.06 cal/g°
ExtremeBDS [4]

Heat required for a system can be calculated by the product of the specific heat, temperature difference and the mass of the system. We calculate it as follows:

Q = mCΔT

Q = 50(0.06)(1)

Q = 3 calories

<span>Therefore, the correct answer from the choices listed is the second option, 3 calories.</span>

4 0
3 years ago
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. 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
adell [148]

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
What is the acceleration due to gravity of the moon<br>​
sashaice [31]

Answer:

Earth's average surface gravity is about 9.8 meters per second per second. When an object is tossed off a building top or a cliff apex, for instance, it accelerates toward the ground at 9.8 meters per second per second. The Moon's surface gravity is about 1/6th as powerful or about 1.6 meters per second per second,

Explanation:

5 0
2 years ago
Plz answer for brainliest trolls will get deleted
Roman55 [17]

Answer:

A; C6H12O6 + 6O2

Explanation:

You can easily differentiate between the reactants and the products, as the reactants are on the left, while the products are on the right.

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3 years ago
A piece of wood has a mass of 36g and measures 3cm X 6cm X 4cm. What is the density of the wood? Would the piece of wood float o
Fudgin [204]

Answer:

Explanation:

The density is  

1.1 g c m 3 .

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