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xenn [34]
3 years ago
14

What are cells made of?

Chemistry
1 answer:
skad [1K]3 years ago
8 0

Answer: All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates, and lipids.

Explanation: please mark as brainliest

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Write a balenced chemical equation for the reaction: include abbreviation for the physical states-
WITCHER [35]

Answer:

MgBr(aq) + (NH4)3PO4(aq) -------> NH4Br(aq) + Mg3(PO4)2(s)

Explanation:

4 0
3 years ago
2Na + CaF2à 2NaF + Ca is an example of a _________ chemical reaction.
marusya05 [52]
<span>2 Na + CaF</span>₂<span> = 2 NaF + Ca

is an example of a </span>single- replacement

answer D

hope this helps!
6 0
3 years ago
Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:
Mazyrski [523]
Ionic compounds are the compounds consists of positive and negative ions.
<span>Zn(2+):------
</span><span>ZnBr2:  
ZnS:
</span>Al(+3):------
Al203
Al2(SO4)^3
<span>Cl:(1-)
NaCl </span>
7 0
3 years ago
Which ONE of the following is an oxidation–reduction reaction? A) PbCO3(s) + 2 HNO3(aq) ––––&gt; Pb(NO3)2(aq) + CO2(g) + H2O(l)
sveta [45]

Answer:

E) C₂H₄(g) + H₂(g) ⇒ C₂H₆(g)

Explanation:

Which ONE of the following is an oxidation–reduction reaction?

A) PbCO₃(s) + 2 HNO₃(aq) ⇒ Pb(NO₃)₂(aq) + CO₂(g) + H₂O(l). NO. All the elements keep the same oxidation numbers.

B) Na₂O(s) + H₂O(l) ⇒ 2 NaOH(aq). NO. All the elements keep the same oxidation numbers.

C) SO₃(g) + H₂O(l) ⇒ H₂SO₄(aq). NO. All the elements keep the same oxidation numbers.

D) CO₂(g) + H₂O(l) ⇒ H₂CO₃(aq). NO. All the elements keep the same oxidation numbers.

E) C₂H₄(g) + H₂(g) ⇒ C₂H₆(g). YES. <u>C is reduced</u> and <u>H is oxidized</u>.

8 0
4 years ago
How many liters of solution are needed to make a 1.85 M solution containing 2.40 moles of KMnO4?
barxatty [35]

Answer:

Volume of solution L = 1.3 L

Explanation:

Given data:

Volume of solution needed = ?

Molarity of solution = 1.85 M

Moles of KMnO₄ = 2.40 mol

Solution:

Formula:

Molarity = number of moles / volume of solution L

1.85 M = 2.40 mol /  volume of solution L

now we will put the values.

Volume of solution L = 2.40 mol  / 1.85 M

          M = mol/L

Volume of solution L = 1.3 L

3 0
3 years ago
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