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Anna35 [415]
3 years ago
6

Some animals only have ___ cell.

Chemistry
1 answer:
DaniilM [7]3 years ago
3 0
Animal cells have a centrosome and lysosomes, whereas plant cells do not.
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The charge of an atom is:
lana66690 [7]

Answer:

The overall charge of an atom is zero. Atoms are made up of positively charged particles called protons and negatively charged particles called electrons as well as non-charged particles called neutrons.

Explanation:

hope it helped

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3 0
2 years ago
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An unknown gas with a formula of HX is contained in a 25.0 L tank at 1.2 atm and 25.0 oC. What is the chemical formula of the ga
ozzi

Answer:

HCl

Explanation:

Volume = 25L

Temperature = 25.0 oC + 273 = 298 K (Converting to kelvin units)

Pressure = 1.2 atm

Mass of gas = 44.7g

Formular of gas = HX

To solve this, we have to know the identity of X. One qay to do that is by obtaining the molecular mass of the compound.

To get the molar mass, we need the number of mole.

Using the ideal gas equation;

PV = nRT

where R = gas constant = 0.082 057 L atm K−1  mol−1

n = PV / RT

n = 1.2 * 25  / 0.082 057 * 298

n = 30  /  24.45

n = 1.227 mol

The relationship between number of moles and molar mass is given as;

Nummber f moles = mass  / molar mass

Molar mass = mass  / Number of moles

Molar mass = 44.7 / 1.227

Molar mass =  36.43 g/mol

Molar mass of gas X = Molar mass of H + Molar mass of X

36.43 = 1 + X

X = 36.43 - 1 = 35.43

Chlorine is the only element with molar mass approximate to 35.43

Hence X = Cl

The chemical formular = HCl

8 0
3 years ago
Help please, will mark you as brainliest
Veseljchak [2.6K]

Answer:

what does it say under the paragraph

Explanation:

5 0
3 years ago
25 g of a chemical is dissolved in 75 g of water. What is the percent by mass concentration of this chemical
Zanzabum

Answer:

300

Explanation:

4 0
2 years ago
The film used to take pictures is coated with?
Naddika [18.5K]

The film which you called it is photographic film and it is strip like sheet and it's surface is clrear and transparent plastic which is coated on

two sided one side is with gelatin emulsion consists microscopic small light-sensor which is actually very sensitive in nature silver halides crystals. The size shape and other characters of the crystals gives the sensitivity,contrast of different colors combination ,and resolution of the films.

6 0
3 years ago
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