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Rudiy27
3 years ago
13

Activity # 1: What's in the number?

Chemistry
1 answer:
Yuliya22 [10]3 years ago
8 0

Answer:nasusjs sahssjsshsgsisns shsshsksksnuw82622728

Explanation:$:hshsgsiamabsgsusisjhsshisissnsbhsussisbsvshsistsysvssjzkxjxheieuxtdbsjs

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The original amount of radioactive substance is 10 grams. After several years, 2.5 gtams of the substance is remaining. How many
nirvana33 [79]
10/2=5 (one half life)
5/2=2.5(two half lives)
8 0
3 years ago
You find a mysterious white powder in your kitchen. It could be cream of tartar (pH=5), sugar (pH=7), baking soda (pH=8), or dra
GREYUIT [131]

The pH indicators to be used are Phenolphthalein, Red cabbage, Bromthymol blue and Congo red.

<h3>What are pH indicators?</h3>

Indicators are substances which change color as the pH of a medium changes.

The common indicators and their pH range is as follows:

  • Phenolphthalein - pH range of 8.3 and 10.5
  • Red cabbage - pH 2 to 10
  • Bromthymol blue - 6.0 to 7.6
  • Congo red - 3.0 to 5.2

Therefore, the indicators to be used are Phenolphthalein, Red cabbage, Bromthymol blue and Congo red.

Learn more about pH indicators at: brainly.com/question/13779537

#SPJ1

8 0
2 years ago
They dump large amounts of rainwater that causes flooding. *
IgorC [24]
Answer =Tsunamis because they flood places and areas
3 0
3 years ago
Read 2 more answers
What is Acid ?<br>please don't report , don't give link and give the correct answer .​
VladimirAG [237]

Answer:

Below in Bold

✧ \underline{ \underline{ \red{ \large{ \tt{E \: X \: P \: L \: A \: N \: A \: T \: I \: O \: N}}}} }:

♨ The word ' acid ' is derived from the Latin word ' acidus ' which means sour. An acid is defined as the substance which gives hydrogen ions or protons ( H+ ) when dissolved in water. For example :

  • Hydrochloric acid
  • Sulphuric acid
  • Nitric acid
  • Carbonic acid
  • Acetic acid

✎ \underline{ \underline{ \purple{ \large{ \tt{Extra \: Info}}}}} :

☃ Physical properties :

  • Acids have a sour taste. But some acids like steric acid, boric acid , salisylic acid do not have a sour taste. Laboratory acids are more corrosive , so they are dangerous to taste.
  • Acid turn blue colour of litmus paper into red and light yellow methyl orange into red. They make phenolphthalein colourless.

☂ Chemical properties :

  • Acids have a high dissolving power and dissolve many substances. Some metals like zinc and magnesium react with acids like dilute sulphuric acid and dilute hydrochloric acid to produce salt and hydrogen gas.
  • Acid react with base to give salt and water.
  • Acid gives H+ ions when dissolved in water.
  • Acid react with metallic carbonates to produce carbon dioxide.

☼ Hope I helped! ♡

Have a wonderful day / night ! ツ

☥ \underbrace{ \overbrace{ \mathfrak{Carry \:On \: Learning}}}

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4 0
3 years ago
Read 2 more answers
Which of these equations is balanced?
mel-nik [20]
A and b are balanced
4 0
3 years ago
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