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rewona [7]
3 years ago
13

A. Synthesis.

Chemistry
1 answer:
Irina-Kira [14]3 years ago
7 0

Answer:

Double replacement

Explanation:

The given reaction is double replacement reaction.

CaCO₃ + 2HCl  → CaCl₂ + H₂CO₃

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

while,

Synthesis reaction:

It is the reaction in which two or more simple substance react to give one or more complex product.

Decomposition:

It is the reaction in which one reactant is break down into two or more product.

AB → A + B

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

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The most common isotopic forms of hydrogen are ordinary hydrogen (1H) and deuterium (2H), which have percent compositions of 99.
Alborosie

Answer:

0. 000115

Explanation:

A percentage is defined as a ratio with a basis of 100 as total substance. Convert a percentage to decimal implies to divide the percentage in 100 because decimal form has as basis 1.

For the isotopic forms:

1H: 99.98% → As percent.

99.98% / 100 = 0.9998 → As decimal form.

2H: 0.0115% → As percent.

0.0115% / 100 = <em>0. 000115</em>→ As decimal form.

5 0
4 years ago
predict the sign on the thermodynamic quantities listed below based on the scene representing a physical change in a piston-cyli
brilliants [131]

Based on a scene showing a physical change in a piston-cylinder assembly, the thermodynamic numbers indicated below are 760 torr 760.

<h3>What elements make up the first rule of thermodynamics?</h3>

The first law of thermodynamics states that the following equation describes how the change in internal energy relates to the heat exchanged by the system and the work performed on or by the system: U = Q + W, where Q represents the heat energy that the system exchanged.

<h3>What are the thermodynamic quantities' two components?</h3>

Extensive and intensive thermodynamic quantities are traditionally separated into these two categories. While intensive quantities are independent of system size, extensive quantities grow linearly with system size.

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4 0
1 year ago
You need to make 200ml of a 2% agarose gel in a buffer solution (1x tae) how many grams of agarose do you need?
garri49 [273]
 The number  of grams of  agarose that  you need  to make 200 ml  of 2% agarose gel  is  4 grams


  calculation
number of   grams  is calculated  using   M/v  x100 =% m/v  formula
  M (mass)  =?
V(volume) = 200 ml
%(M/V)  = 2%

convert  the  2 % M/V   into fraction  = 2/100  

then  substitute the values into the  equation

= M/200 ml  = 2/100

multiply both side by 200

M is therefore  = 2/100 x200

M=4 grams


3 0
3 years ago
Which of the fallowing elements is the most reactive?
Alexxx [7]
Which elements are most reactive?

The alkali metals, found in group 1 of the periodic table (formerly known as group IA), are very reactive metals that do not occur freely in nature. These metals have only one electron in their outer shell. Therefore, they are ready to lose that one electron in ionic bonding with other elements.

Fluorine is the most reactive
5 0
4 years ago
.In a _____ relationship one variable increases and a second variable increases proportionally,
liraira [26]

Answer:

Explanation: b

8 0
3 years ago
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