2 years ago

MASTERING CONCEPTS 31. List three examples of substances. Explain why each is a substance.

Chemistry

1 answer:

SOVA2 [1]2 years ago

6 0

Answer:

Explanation:

cvcv

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Answer:

It's the last option.

Explanation:

H3PO4 + 5HCl → PCl5 + 4H2O

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3 years ago

What are two main groups of forces

Anuta_ua [19.1K]

Answer:

There are 2 types of forces, contact forces and act at a distance force. Every day you are using forces. Force is basically push and pull. When you push and pull you are applying a force to an object.

Explanation:

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How fast must a 56.5-g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green li

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Answer:vv

$v=2.17\times 10^{-26}\ m/s$

Explanation:

The expression for the deBroglie wavelength is:

$\lambda=\frac {h}{m\times v}$

Where,

$\lambda$ is the deBroglie wavelength

h is Plank's constant having value $6.626\times 10^{-34}\ Js$

m is the mass of = $56.5\ g=0.0565\ kg$

v is the speed.

Wavelength = 5400 Å = $5400\times 10^{-10}\ m$

Applying in the equation as:-

$5400\times 10^{-10}=\frac{6.626\times 10^{-34}}{0.0565\times v}$

$v=\frac{331300000}{10^{34}\times \:1.5255}\ m/s$

$v=2.17\times 10^{-26}\ m/s$

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3 years ago

What is equavlent to 14,000 mm^3

aleksklad [387]

Answer:

1.4 * 10∧4

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How do you write out and balance calcium hydroxide reacts with hydrogen chloride to produce calcium chloride and water

Temka [501]

Answer:

Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O

Explanation:

Reactants;

Calcium hydroxide = Ca(OH)₂

Hydrogen chloride = HCl

Products;

Calcium chloride = CaCl₂

Water = H₂O

The reaction equation:

Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O

The reaction is a neutralization reaction where acids reacts with bases to produce salt and water only.

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3 years ago