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Pepsi [2]
3 years ago
7

How are radio waves transmitted

Chemistry
1 answer:
kotegsom [21]3 years ago
7 0
Attractive antennas that pull the waves tword it.
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How to calculate the number of moles
babunello [35]

Answer:

1. The formula for the number of moles formula is expressed as.

2. Given.

3. Number of moles formula is.

4. Number of moles = Mass of substance / Mass of one mole.

5. Number of moles = 95 / 86.94.

6 0
3 years ago
When methane ( CH4 ) burns, it reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reac
slega [8]
<h2>Answer:</h2>1.33*10^{-2}grams

<h2>Explanations</h2>

The complete balanced equation for the given reaction is expressed as;

CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

Given the following parameters

Mass of CH4 = 5.90×10^−3 g = 0.0059grams

Determine the moles of methane

\begin{gathered} moles\text{ of CH}_4=\frac{mass}{molar\text{ mass}} \\ moles\text{ of CH}_4=\frac{0.0059}{16.04} \\ moles\text{ of CH}_4=0.000368moles \end{gathered}

According to stoichimetry, 1 mole of methane produces 2 moles of water, hence the moles of water required will be:

\begin{gathered} moles\text{ of H}_2O=\frac{2}{1}\times0.000368 \\ moles\text{ of H}_2O=0.000736moles \end{gathered}

Determine the mass of water produced

\begin{gathered} Mass\text{ of H}_2O=moles\times molar\text{ mass} \\ Mass\text{ of H}_2O=0.000736\times18.02 \\ Mass\text{ of H}_2O=0.0133grams=1.33\times10^{-2}grams \end{gathered}

Therefore the mass of water produced from the complete combustion of 5.90×10−3 g of methane is 1.33 * 10^-2grams

5 0
1 year ago
A solar panel combines multiple photovoltaic cells. Which type of energy is used to power a solar panel? kinetic energy thermal
fredd [130]
<h2>Answer : Electromagnetic energy</h2><h3>Explanation :</h3>

The solar panel usually combines multiple photo voltaic cells. Electromagnetic energy is used to power a solar panel. As the electromagnetic energy or rather radiations from the sun reaches to Earth in the form of radiation which is then collected by these photo voltaic cells. As the term solar energy simply suggests that the energy is coming from the sun. Thus, electromagnetic energy coming from the sun was produced when electric charges inside the sun change their potential energy.

6 0
2 years ago
How would scientists most likely describe the system of the Earth in regard to energy?
Nuetrik [128]

Answer:

4 is the best answer but incomplete.

Explanation:

Heat from the Earth is also radiated back into space. The in and out of energy is what makes it an open system.

8 0
3 years ago
A laser pointer emits light that has a wavelength of 5.32x 10–7 m. What is the frequency of the light?
butalik [34]

Answer:

Frequency = 0.6 × 10¹⁵ s⁻¹

Explanation:

Given data:

Wavelength = 5.32 × 10⁻⁷ m

Frequency = ?

Solution:

Formula:

speed of light = wavelength × frequency

Frequency = speed of light / wavelength

Frequency =  3 × 10⁸ m/s /  5.32 × 10⁻⁷ m

Frequency = 0.6 × 10¹⁵ s⁻¹

8 0
3 years ago
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