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3 years ago

Examples of symmetrical objects

Chemistry

2 answers:

butalik [34]3 years ago

8 0

Answer:

Explanation:

Reflection of trees in clear water and reflection of mountains in a lake. Wings of most butterflies are identical on the left and right sides. Some human faces are the same on the left and right side. People can also have a symmetrical mustache.

svlad2 [7]3 years ago

3 0

1.25 is closer to 1.04 or not ?
plz heelp

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Formula units in 0.0300 moles of cacl2

spin [16.1K]

Answer:

no of formula unit = $0.03\times 6.023\times 10^{23}=1.8\times 10^{22}$

Explanation:

atomic mass of CaCl2 = 40 + 2×35.5 = 111 g.

no of formula unit = no of moles × Avagadro number

= $0.03\times 6.023\times 10^{23}=1.8\times 10^{22}$

3 0

4 years ago

How many grams of water can be produced from 4.6 grams of Hydrogen and 7.3 grams of Oxygen?

12345 [234]

Answer:

The answer to your question is 8.21 g of H₂O

Explanation:

Data

mas of water = ?

mass of hydrogen = 4.6 g

mass of oxygen = 7.3 g

Balanced chemical reaction

2H₂ + O₂ ⇒ 2H₂O

Process

1.- Calculate the atomic mass of the reactants

Hydrogen = 4 x 1 = 4 g

Oxygen = 16 x 2 = 32 g

2.- Calculate the limiting reactant

Theoretical yield = H₂/O₂ = 4 / 32 = 0.125

Experimental yield = H₂/ O₂ = 4.6/7.3 = 0.630

From the results, we conclude that the limiting reactant is Oxygen because the experimental yield was higher than the theoretical yield.

3.- Calculate the mass of water

32 g of O₂ ---------------- 36 g of water

7.3 g of O₂ --------------- x

x = (7.3 x 36) / 32

x = 262.8 / 32

x = 8.21 g of H₂O

4 0

4 years ago

Which element causes burning when me mix it with oxygen

kirill [66]

Answer:

Hydrogen peroxide is ans

7 0

3 years ago

Density of a piece of wood that has a measurement of 24 cm3 and 768 g

Brut [27]

Answer:

<h3>The answer is 32 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 768 g

volume = 24 cm³

We have

$density = \frac{768}{24} \\$

We have the final answer as

Hope this helps you

4 0

4 years ago

Read 2 more answers

If I have 3.2 moles of gas at a pressure of 0.095 atm and at a temperature o 43 C what is the volume of the container that the g

andriy [413]

Answer

The volume of the container that the gas is in = 874.30 L

Explanation

Given:

Moles, n = 3.2 mol

Pressure, P = 0.095 atm

Temperature, T = 43 °C = (43 + 273.15 K) = 316.15 K

Molar gas constant, R = 0.0821 atm•L/mol•K

What to find:

The volume of the container that the gas occupied.

Step-by-step solution:

The volume of the container that the gas occupied can be calculated using the ideal gas equation.

$\begin{gathered} PV=nRT \\ \\ \Rightarrow V=\frac{nRT}{P}=\frac{3.2mol\times0.0821atm•L/mol•K\times316.15K}{0.095atm} \\ \\ V=\frac{83.058928\text{ }atm•L}{0.095\text{ }atm}=874.30\text{ }L \end{gathered}$

Therefore, the volume of the container that the gas occupied is 874.30 L

5 0

1 year ago