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3 years ago

What is a physical property of silver?

2 answers:

7 0

Study sometime, lol JK! I'm here to help.

Physical Property. ... Physical properties of matter include color, hardness, malleability, solubility, electrical conductivity, density, melting points, and boiling points. For the elements, color does not vary much from one element to the next. The vast majority of elements are colorless, silver, or gray.

So the answer would be Density

Musya8 [376]3 years ago

5 0

The physical property of silver include being the most malleable metal. It is a soft, white metal, and has a shiny surface.

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Ms. Block's students are studying chemical reactions as well as the law of conservation of matter. A classic reaction occurs whe

goblinko [34]

The answer is; C

Conservation of matter in a reaction means that the mass of matter in the products is equal to the mass of the reactants. Energy/matter cannot be created or destroyed but converted from one form to another.

An expanding balloon with the increased evolution of gas is a good visible practical sign in the experiment on the conservation of matter in the reaction. As the magnesium disappears with an increased input of hydrochloric acid, the balloon gets bigger showing that more hydrogen is evolved from the reaction;

2HCL + Mg  MgCl2 + H2

4 0

3 years ago

Read 2 more answers

Echolocation refers to the reflection of what kind of waves? *

elixir [45]

Answer: a disturbance that transfers energy.

Explanation:

7 0

3 years ago

Read 2 more answers

Which list includes three types of chemical reactions?

Sidana [21]

Answer=3

Decomposition, double replacement, and synthesis are 3 types of chemical reactions.

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3 years ago

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Read the given equation. 2Na + 2H2O → 2NaOH + H2

Crank

Answer:

B) 12.9 grams.

Explanation:

How many moles of molecules in that 6.30 L of H₂?

The volume of one mole of an ideal gas at STP (0 °C, 1 atm) is 22.4 liters.

(The volume of that one mole of gas at STP will be 22.7 liters if STP is defined as 0 °C and 10⁵ Pa).

$\displaystyle n(\text{H}_2) = \frac{6.30\;\text{L}}{22.4\;\text{L}\cdot\text{mol}^{-1}} = 0.28125\;\text{mol}$ .

How many moles of Na will be needed?

The coefficient in front of Na in the equation is twice the coefficient in front of H₂. It takes two moles of Na to produce one mole of H₂.

$n(\text{Na}) = 2\;n(\text{H}_2) = 2\times 0.28125= 0.5625\;\text{mol}$ .

What's the mass of that many Na atoms?

Refer to a modern periodic table. The molar mass of ₁₁Na is 22.990. The mass of one mole of Na atoms is 22.990 gram. The mass of 0.5625 moles of Na atoms will be

$m = n\cdot M = 0.5625 \times 22.990 = 12.9\;\text{g}$ .

(2 sig. fig. as in the volume of the H₂ gas.)

6 0

3 years ago

Please help does anyone know this// science!

Gwar [14]

Answer:

its A

Explanation:

The only one that makes sense

3 0

3 years ago