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3 years ago

Solve the following problem and round the correct number of significant

Chemistry

1 answer:

RUDIKE [14]3 years ago

5 0

Answer:

4.5 + 2.34 = 6.8

Sig Figs:

Decimals:

Scientific Notation:

6.8 × 10ⁿ

Words:

six point eight

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Describe the physical properties of each state of matter

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3 years ago

Is a compound microscope a complex microscope??? Give your reason why it is :P

IrinaK [193]

Answer:

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3 years ago

A sample of 7.34 g of solid calcium hydroxide is added to 34.5 mL of 0.380 M Aqueous hydrochloric acid.Write the balanced chemic

oksian1 [2.3K]

Answer: $Ca(OH)_2(s)+2HCl(aq)\rightarrow CaCl_2(aq)+2H_2O(l)$

Explanation:

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A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.

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3 years ago

What is the energy of the photons of a laser with a frequency of 5.75 x 10^12 Hz? (Hint: Remember to round your answer to the lo

Simora [160]

Answer:

E = 3.81×10 ⁻²¹ J

Explanation:

Given data:

Frequency of photon = 5.75 ×10¹² Hz

Plancks constant = 6.626 ×10⁻³⁴ Js

Energy of photon = ?

Solution:

E = h×f

E = 6.626 ×10⁻³⁴ Js × 5.75 ×10¹² s⁻¹

E = 38.1×10 ⁻²² J

E = 3.81×10 ⁻²¹ J

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3 years ago