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lisabon 2012 [21]
4 years ago
15

PLEASE ANSWER First get brainly 50 POINTS

Chemistry
1 answer:
Liula [17]4 years ago
5 0

Explanation:

1. photosynthesis

2. Nucleus. The nucleus is the largest and most significant living organelle of the cell. ... Hence it is called brain or control centre of the cell.

3.Cytoplasm

Cells require a thick jelly-like substance that holds organelles in place inside the cell. This substance is known. Cytoplasm. Turgor pressure can help plants move.

4.Chloroplasts absorbing solar energy for cellular activities.

5.cell membrane

6.a.cell wall

b.chloroplast

c.large vacuole

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What is mole concept and muscular mass
Fantom [35]

the mole concept :

a mole (mol) is defined as the amount of substance that contains as many atoms, molecules, icons, electrons or any other elementary entities as there are carbon atoms in exactly 12 gm of. the number of atoms in 12gm of is called Avogadro's number.

I'm not sure about muscular mass sorryyyy

6 0
3 years ago
Iteams in house made of thermosetting plastics?
Law Incorporation [45]
Thermoplastics and thermosetting polymers Examples include: polyethylene (PS) and polyvinyl choline (PVC). Common thermoplastics range from 20,000 to 50,000 amu, while thermosets are assumed to have infinite molecular weight.
3 0
3 years ago
Calculate the minimum mass of sulfuric acid that could be left over by the chemical reaction. Be sure your answer has the correc
REY [17]

Full Question:

Aqueous sulfuric acid H2SO4 will react with solid sodium hydroxide NaOH to produce aqueous sodium sulfate Na2SO4 and liquid water H2O. Suppose 94g of sulfuric acid is mixed with 49.9g of sodium hydroxide. Calculate the minimum mass of sulfuric acid that could be left over by the chemical reaction. Be sure your answer has the correct number of significant digits.

Answer:

32.8725g

Explanation:

First thing's first, we write out the balanced chemical equation;

2NaOH + H2SO4 --> Na2SO4 + 2H2O

The question hints that sulphuric acid would be in exess by asking to calculate the minium mass that would be left over.

We proceed by calculatng the amount of sulphuric acid that would react with  49.9g of sodium hydroxide.

From the reaction,

2 moles of NaOH reacts with 1 mole of H2SO4.

Calculate moles of sodium hydroxide:

Molar mass of NaOH= 40.0 g/mol

Mass of NaOH = 53 g

moles = Maass /  Molar mass = 1.2475

This means 1.2475 would react with x number of moles;

2 = 1

1.2475 = x

x = 1.2475 / 2 = 0.62375

Mass of Sulphuric acid reacted = moles * molar mass = 0.62375 * 98 = 61.1275g

Mimium mass of left over = 94 - 61.1275g = 32.8725g

4 0
3 years ago
Assume that you did the following dilutions
MrMuchimi
Below is the solution. I hope it helps. 

CfVf = CiVi 
<span>Cf = (CiVi)/ Vf </span>

<span>i. Cf = [ (10^-6 mol / L) (1 mL) (1L / 1000 mL) ] / [ (1kL) (1000L / 1 kL) ] = 1x10^-12 M → use as Ci in next dilution </span>
<span>ii. Cf = 1x10^-19 M → use as Ci in next dilution </span>
<span>iii. Cf = 1x10^-22 M </span>
6 0
3 years ago
Read 2 more answers
At STP what is the volume of 16.34 grams of nitrogen gas?
nika2105 [10]

Answer:

Volume = 13.06 L

Explanation:

We are given: mass of nitrogren gas = 16.34 g

We know: molar mass of nitrogen gas = 28.014 g/mol

: ideal gas law constant = 0.082 L.atm/K.mol

At STP: temperature = 273.15 K

: pressure = 1 atm

We first determine the number of moles of nitrogen gas:

n = m/M

= 16.34/28.014

= 0.58 mol

Using the ideal gas law:

\begin{gathered} PV\text{ = nRT} \\  \\ \therefore V\text{ = }\frac{nRT}{P}\text{ = }\frac{0.58\times0.082\times273.15}{1}\text{ = 13.06 L} \end{gathered}

6 0
1 year ago
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