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juin [17]
3 years ago
7

Which statement defines the first law of thermodynamics?

Chemistry
1 answer:
romanna [79]3 years ago
7 0
The answer should be A. "The first law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are subject to the principle of the conservation of energy." (LiveScience) Basically, energy cannot be created nor destroyed, only changed in its form.
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Is hydrogen the only non-metal positive ion?
rjkz [21]

Answer:

Why hydrogen is the only non-metal elements which loses electron to form positive ions ? ... When hydrogen bonded with most electronegative element then it forms a positive ions but when it bonded with less electronegative element then it forms a negative ion.

7 0
3 years ago
What is the required molarity of a ba(oh)₂ solution to prepare a 1.0 m oh⁻ solution?
timurjin [86]
  The   molarity   of  a  Ba(OH)2  solution  required to prepare   a1.0 OH-  solution  is  calculated  as  follows


write   the  equation  for  dissociation of  Ba(Oh)2


that  is,

Ba(Oh)2  -----> Ba^2+   +  2Oh-

by  use  of  reacting   ratio  between  Ba(Oh)2  to  Oh  which  is   1:2  the  molarity of  Ba(oh)2  =    1.0/2 =  0.5 M
8 0
4 years ago
Read 2 more answers
The prefix 'kilo-' means a thousand. So a kilo-gram is a thousand grams. 1 kilogram=1,000 grams How many kilograms is 1,008 gram
lesantik [10]

<u>Answer:</u>  1.0 kilograms.

<u>Explanation:</u>

One kilogram is equal to a thousand grams.

Supposing x to be the number of kilograms equal to one thousand and eight grams, we can write it as:

1 kg = 1000 grams

x kg = 1008 grams

To solve for x, we can simply divide 1008 grams by 1000 thousand grams to get the answer.

x = 1008 / 1000

x = 1.008

Rounding this value to the nearest tenth, it will become 1.0 kilograms.

4 0
4 years ago
Which of the following shows a correct base pairing in DNA
statuscvo [17]
DNA bop it does not say it in my test
6 0
3 years ago
PLEASE HELP!!!!!!
jeyben [28]

<u>Answer:</u> The correct option is 1 mole of acetic acid was required for 2 moles of sodium bicarbonate

<u>Explanation:</u>

We are given:

Average number of drops of sodium bicarbonate = 142

The chemical equation for the reaction of sodium bicarbonate and acetic acid in vinegar follows:

NaHCO_3+CH_3COOH\rightarrow CH_3COONa+H_2CO_3

From the stoichiometry of the reaction:

1 mole of sodium carbonate reacts with 1 mole of acetic acid in vinegar.

Hence, the correct option is 1 mole of acetic acid was required for 2 moles of sodium bicarbonate

4 0
3 years ago
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