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3 years ago

The smallest unit that can exist as an element and still have the properties of that element is a(n):

Chemistry

2 answers:

Yuri [45]3 years ago

8 0

The smallest unit that can exist as an element and still have proprieties of that element is an Atom<span />

liq [111]3 years ago

6 0

Explanation:

Every element is made up of atoms which cannot be further divided into simpler substances.

For example, a piece of zinc metal will only contains atoms of zinc and no there element.

Since, these atoms are the same as the element itself. Hence, the element still retain its properties because there no other different element is present in it.

Thus, we can conclude that the smallest unit that can exist as an element and still have the properties of that element is an atom.

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If sodium arsenite is Na3AsO3, the formula for calcium arsenite would be

lara31 [8.8K]

Answer:

Ca₃(AsO₃)₂

Explanation:

Sodium arsenite, with the chemical formula Na₃AsO₃, is formed by the cation Na⁺ and the anion AsO₃³⁻. For the molecule to be neutral, 3 cations Na⁺ and 1 anion AsO₃³⁻ are required.

Calcium arsenite would be formed by the cation Ca²⁺ and the anion AsO₃³⁻. For the molecule to be neutral, we require 3 cations Ca²⁺ and 2 anions AsO₃³⁻. The resulting chemical formula is Ca₃(AsO₃)₂.

4 0

4 years ago

Need this answered ASAP

prohojiy [21]

The concentration of the final solution will be 0.2886 M.

<h3>Molar concentration</h3>

50.6 g of NaCl is dissolved in 600 mL of water.

Mole of 50.6 g NaCl = 50.6/58.44 = 0.8658 mol

Molar concentration of the oiriginal solution = 0.8658/06 = 1.4431 M

25 mL of 1.4431 M of the solution is diluted up to the 125 mL mark.

m1 = 1.4431, v1 = 25 ml, v2 = 125 mL

m2 = m1v1/v2 = 1.4431 x 25/125 = 0.2886 M

The concentration of the final solution will be 0.2886 M

More on molar concentration can be found here: brainly.com/question/15532279

#SPJ1

7 0

2 years ago

How many miles of a gas at 100 c does it take to fill a 1.00 l flask to a pressure of 152kPa

Hatshy [7]

The complete question is as follows: How many moles of a gas at 100 c does it take to fill a 1.00 l flask to a pressure of 152kPa

Answer: There are 0.0489 moles of a gas at $100^{o}C$ is required to fill a 1.00 l flask to a pressure of 152kPa.

Explanation:

Given: Volume = 1.00 L,

Pressure = 152 kPa (1 kPa = 1000 Pa) = 152000 Pa

Convert Pa into atm as follows.

$1 Pa = 9.86 \times 10^{-6} atm\\152000 Pa = 152000 \times \frac{9.86 \times 10^{-6}atm}{1 Pa}\\= 1.5 atm$

Temperature = $100^{o}C = (100 + 273) K = 373 K$

Using the ideal gas formula as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

$PV = nRT\\1.5 atm \times 1.0 L = n \times 0.0821 L atm/mol K \times 373 K\\n = \frac{1.5 atm \times 1.0 L}{0.0821 L atm/mol K \times 373 K}\\n = 0.0489 mol$

Thus, we can conclude that there are 0.0489 moles of a gas at $100^{o}C$ is required to fill a 1.00 l flask to a pressure of 152kPa.

5 0

3 years ago

Smooth muscle myosin is a motor protein that plays a crucial role in the contraction of smooth muscle. If this protein has a mol

zysi [14]

Answer: Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass, occupies 22.4 L at STP contains avogadro's number $(6.023\times 10^{23})$ of particles.