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4 years ago

6. What is a joint? What are three examples of joints?

Chemistry

1 answer:

marusya05 [52]4 years ago

3 0

Explanation:

joint is the place where two or more bone articulate or join

examples

ball and socket joint

pivot joint

hinge joint

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A newly discovered element, Z, has two naturally occurring isotopes. 90.3 percent of the sample is an isotope with a mass of 267

blsea [12.9K]

atomic mass=percentage of isotope a * mass of isotope a + percentage of isotope b * mass of isotope b+...+percentage of isotope n * mass of isotope n.

Data:
mass of isotope₁=267.8 u
percentage of isotope₁=90.3%

mass of isotope₂=270.9 u
percentage of isotope₂=9.7%

Therefore:

atomic mass=(0.903)(267.8 u)+(0.097)(270.9 u)=
=241.8234 u + 26.2773 u≈268.1 u

Answer: the mass atomic of this element would be 268.1 u

7 0

3 years ago

Eview Questions

otez555 [7]

Answer:

Qualitative: Physical observations (the sky is blue, the water is boiling, etc.)

Quantitative: Numberical observations (density= 1 g/ml, volume= 14 ft^3, etc.)

Explanation:

The way to remember it is quaLitative is qualities of the object. QuaNtitative is quantities of the object.

5 0

3 years ago

Momentum is. __________

horrorfan [7]

is the product of the mass and velocity of an object, quantified in kilogram-meters per second.

7 0

3 years ago

6. What is the pressure of 0.60 moles of a gas if its volume is 10.0 liters at 35.0°C?

denis-greek [22]

Answer: The pressure inside the cylinder will be 1.5 atm. The pressure can be calculated using the Ideal Gas Equation which relates the pressure, volume, temperature, and amount of gas to each other.

Further Explanation

The Ideal Gas Equation is:

$PV = nRT$

where:

P - pressure (in atm)

V - volume (in L)

n - amount of gas (in moles)

R - universal gas constant $0.08206 \frac{L-atm}{mol-K}$

T - temperature (in K)

In the problem, we are given the values:

P = ?

V = 10.0 L (3 significant figures)

n = 0.60 moles ( 2 significant figures)

T = 35.0 degrees Celsius (3 significant figures)

We need to convert the temperature to Kelvin before we can use the Ideal Gas Equation. The formula to convert from degree Celsius to Kelvin is:

$Temperature \ in \ Kelvin = Temperature\ in \ Celsius \ + \ 273.15$

Therefore, for this problem,

$Temperature\ in \ K = 35.0 +273.15\\Temperature\ in \ K = 308.15$

Solving for P using the Ideal Gas Equation:

$P = \frac{nRT}{V} \\P = \frac{(0.60\ mol) \ (0.08206 \ \frac{L-atm}{mol - K}) \ (308.15\ K) \ }{10.0 \ L} \\P = 1.51\ atm$

The least number of significant figures is 2, therefore, the final answer must have only 2 significant figures.

Learn More

1. Learn more about Boyle's Law brainly.com/question/1437490

2. Learn more about Charles' Law brainly.com/question/1421697

3. Learn more about Avogadro's Law brainly.com/question/1964205

Keywords: Ideal Gas Law, Gas Pressure

7 0

4 years ago

Given your results of Part III, predict the solubility of the following mixtures. Explain your answers. a) Methanol (CH,OH) in w

Setler79 [48]

Answer:

( a ) soluble

( b ) soluble

( c ) insoluble

Explanation:

Solubility is determined by the principle , "like dissolves like" .

i.e. ,<u> if a compound is polar then it will dissolve in a polar compound only , </u>and

<u>if a compound is non - polar then it will dissolve in a non - polar compound only .</u>

Hence , from the question ,

( a )

Methanol and water as we know are both polar species , hence , according to the principle - soluble .

( b )

Hexane and cyclohexane

Both the species are polar species , hence , according to the principle - soluble .

( c )

Hexane and water

In this case ,

Hexane , is non polar and water is polar , hence , the mixture will be non soluble .

6 0

4 years ago