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3 years ago

Sound waves move the slowest through which medium : water ice air wood

Chemistry

2 answers:

Sladkaya [172]3 years ago

7 0

Answer: c - air

Explanation: took the test

sasho [114]3 years ago

5 0

Answer

Sounds travel slowest in gasses so it would be air

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A metallic substance separates into different metals when heated to certain temperatures. This substance may be an

MariettaO [177]

Answer:

The substance may be an alloy

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3 years ago

Why does an increase in temperature typically cause an increase in rate of reaction?

Alja [10]

Answer:

Explanation:

because it decrese the activation energy

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3 years ago

Allotropes are different molecular forms of an element, such as dioxygen (O₂) and ozone (O₃). (b) Calculate the ratio of densiti

kipiarov [429]

The ratio of densities, d₀₃/d₀ is 3:2

We know that at STP all gas have the same volume that is $22.4 \mathrm{~L}$ .

Dioxygen $1 \mathrm{mLe} \mathrm{O}_{2}=32 \mathrm{gm} / \mathrm{moL} .$

Ozone 1 mole $\mathrm{O}_{3}=48 \mathrm{gm} / \mathrm{mol}$ .

$\begin{aligned} \therefore \text { density of } \mathrm{O}_{2} \text { at STP } &=\frac{\text { mass of } \mathrm{O}_{2}}{\text { volume }} \\ \text { or, } d_{\mathrm{O}_{2}} &=\frac{32 \mathrm{gm} / \mathrm{mol}_{\mathrm{o}}}{22.4 \mathrm{~L}} \end{aligned}$

$\therefore$ The ratio of densities,

$\frac{d_{3}}{d o_{2}}=\frac{\frac{48 \mathrm{gm} / \mathrm{mol}}{22.4 \mathrm{~L}}}{\frac{32 \mathrm{gm} / \mathrm{mol}}{22.4 \mathrm{~L}}}$

$\frac{d 0_{3}}{d 0_{2}}=\frac{3}{2}$

do3: do2 = 3:2

Oxygen is found naturally as a molecule. two oxygen atoms strongly bind together with a covalent double bond to shape dioxygen or O2. Oxygen is normally observed as a molecule. it is referred to as dioxygen.

After hydrogen and helium, oxygen is the third most plentiful element in the universe and the most established element in the world. two atoms of the factors combine to generate dioxygen, an odourless and colourless diatomic gasoline with the formulation O2, at ordinary temperature and stress.

Learn more about dioxygen brainly.com/question/19905677

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2 years ago

E85 fuel is a mixture of 85% ethanol and 15% gasoline by volume. What mass in kilograms of E85 (d = 0.758 g/mL) can be contained

NISA [10]

Convert gal to liters:

14.0 gal x 3.785 L / gal = 53.0 L

Multiply volume by density (the density would have the units of .758 g/mL or .758 kg / L)

53.0 L x .758 kg/L = <span> 40.2 kg</span>

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3 years ago

How many molecules of CO2 are equivalent to 112g CO2 scientific figures

Marrrta [24]

Answer:

N(CO2) = n(CO2) x Avogadros constant

n(CO2) = mass(CO2)/Molar mass(CO2) = 112/44 = 2.5454….

N(CO2) = 2.545454… x (6.02 x 10^23) = 1.5323636 x 10^24

Therefore, the number of CO2 molecules in 112 g of CO2 = 1.53 x 10^24 molecules

6 0

3 years ago

Read 2 more answers