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Tasya [4]
3 years ago
9

Before viewing prepared slides under a microscope, students should review the safety rules for

Chemistry
2 answers:
Alborosie3 years ago
8 0
Hello,

Answer: the second one

Explanation:

Preventing and cleaning up chemical pills and one one gets hurt :)
snow_tiger [21]3 years ago
5 0

cleaning up and disposing of broken glass.

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A nucleoside has no ____ group and is not a part of a nucleic acid
avanturin [10]
A nucleoside has no natural group and is not a part of a nucleic acid. 
3 0
3 years ago
What is the electrical charge of an atom that has lost an electron?
Ket [755]

Sometimes atoms gain or lose electrons. The atom then loses or gains a "negative" charge. These atoms are then called ions. Positive Ion - Occurs when an atom loses an electron (negative charge) it has more protons than electrons.

the answer is NEGATIVE CHARGE

3 0
3 years ago
In the reaction aA + bB >> dD, the lowercase letters represent?
jolli1 [7]

Answer:

Coefficient

Explanation:

Chemical equation:

aA + bB    →   dD

This equation shows that reaction is balanced by coefficient q,b and d.

Reactant    coefficients              Product      Coefficient

A                    a                               D                     d

 B                    b                  

Every balanced equation follow the law of conservation of mass.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass. The numbers 6 with CO₂, 6 with H₂O and 6 with O₂  are coefficient which balance the equation.

8 0
2 years ago
Write out and balance the chemical equation:
malfutka [58]

Explanation:

NiCl2 + KOH = NiOH + KCl

since nickel is the primary element in nickel ii chloride, find the oxidation no of nickel in the compound and chlorine should have 2 as a subscription since the ii in the compound represents that nickel has an oxidation no of 2

4 0
3 years ago
Read 2 more answers
Ngl I have no clue what I’m doing can someone help me pls this is due liek in 15 mins
Ad libitum [116K]
1. Calcium & Nitrogen: Ca3N2
2. Aluminum & Chlorine: AlCl3
3. Aluminum & Nitrogen: AlN
4. Potassium & Bromine: KBr
5. Magnesium & Oxygen: MgO
6. Sodium & Sulfur: Na2S
5 0
2 years ago
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