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3 years ago

What is a chemical energy

Chemistry

1 answer:

Citrus2011 [14]3 years ago

7 0

Consider a battery that uses chemicals to produce energy

Chemical energy. A liquid substance that produces energy.

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80g of sodium hydroxide reacts with excess sulfuric acid to produce 142g of sodium sulfate. What mass of sodium hydroxide would

Ostrovityanka [42]

Answer:

Mass of sodium hydroxide needed = 28.2 g

Explanation:

Given data:

Mass of sodium hydroxide = 80 g

Mass of sodium sulfate produced = 142 g

Mass of sodium hydroxide needed = ?

Mass of sodium sulfate produced = 50 g

Solution:

Mass of sodium sulfate produced / Mass of sodium hydroxide = Mass of sodium sulfate produced / x

142 g/ 80 g = 50 g / x

x = 50 g × 80 g / 142 g

x =4000 g/ 142

x = 28.2 g

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2 years ago

Write the formulas for the following compounds :

Vanyuwa [196]

Sodium phosphate = Na₃PO₄

phosphorus triiodide = PI3

hope this helps. make brainliest please!

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2 years ago

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A blu-ray laser has a wavelength of 405nm. In what region of the electromagnetic spectrum is this radiation? What is its frequen

love history [14]

Answer:

It lies in in the visible region.

Frequency: is 7.407 × 10^-14 Hz

${ \bf{V = f \lambda}} \\ { \tt{3.0 \times {10}^{8} = f \times (405 \times {10}^{ - 9}) }} \\ { \tt{f = 7.407 \times {10}^{14} \: hertz}}$

Explanation:

V is speed of light.

f is frequency

lambda is the wavelength

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2 years ago

Compare and Contrast the differences between plant animal cells.

sergij07 [2.7K]

Animal cells do not have a cell wall or chloroplasts but plant cells do. Animal cells are mostly round and irregular in shape while plant cells have fixed, rectangular shapes.

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2 years ago

PLEASE HELP!!!! i give a lot of points

hammer [34]

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2 years ago