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Lunna [17]
3 years ago
11

What is the standard unit used to measure mass

Chemistry
2 answers:
kicyunya [14]3 years ago
8 0
Kg is usually used standard ly
AlladinOne [14]3 years ago
3 0
The standard International System of Units (SI) unit of mass is the kilogram(kg). The kilogram is 1000 grams (g), first defined in 1795 as one cubic decimeter of water at the melting point of ice.
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Refer to the following illustration to answer this Question.
ad-work [718]

Answer:

Option (B) It separates the hydrogen ion (H+) from the chlorine ion (Cl–).

Explanation:

The reaction above simply illustrate the dissociation of HCl when dissolve is water.

When HCl is dissolved in H2O, it will separate into the hydrogen ion, H+ and chloride ion Cl- as shown below

HCl —> H+ + Cl-

The water help to separate the H+ from the Cl-

4 0
3 years ago
The element iodine forms a(n) _______ with the charge . The symbol for this ion is , and the name is . The number of electrons i
-BARSIC- [3]

Answer:

The element iodine forms an anion with the charge -1. The symbol for this ion is I⁻¹, and the name is iodide. The number of electrons in this ion is 7.

Explanation:

Hello,

In this case, we have to consider iodine has the capacity to accept the electrons lost by other elements such as metals or hydrogen by becoming negatively charged. Such phenomena makes iodine to form an anion (negatively charged) with the charge -1, since it only needs one electron to attain the octet. Moreover, the symbol of such ion is I⁻¹ and its name is iodide. By cause of the aforementioned, the number of electrons it has is 7 since at its outer shell seven electrons are found (see electron configuration Kr,5s²,5p⁵).

Best regards.

7 0
3 years ago
A chemical change :a.occurs when powdered lemonade is stirred into water. b.occurs when water is vaporized. c.occurs when paper
pentagon [3]

Answer: E. Occurs when methane gas is burned.

Explanation:

A chemical change occurs when matter undergoes a change to form a new substance with different chemical properties, and the reaction is usually not reversible.

In the case of burning methane gas (CH4) ,oxygen and methane are the reactants, while the new substance formed from the reaction are carbondioxide (CO2) and water (H2O) .

7 0
4 years ago
How to write a word equation for CaCl2
schepotkina [342]
The answer is calcium chloride.
5 0
3 years ago
You test the pH of the kiddie pools water. You discover thats its pH is 6.3. Is the water too acidic or too basic? how could thi
Luda [366]
Having a pH of 6.3 for a kiddie pool would be considered as acidic. You need to increase this value to keep it safe for use. The safest pH level would be from 7.2 to 7.4. This would be safe for the skin of the one who uses the pool. Hope this answers the question.
3 0
3 years ago
Read 2 more answers
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