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3 years ago

What are diseases or disorders that effect the skeletal system

2 answers:

8 0

Osteoporosis, Leukemia, Osteopenia, osteitis deformans, and osteomalacia are all diseases that effect the skeletal system. I hope I helped!

mamaluj [8]3 years ago

8 0

Osteogenesis Imperfecta (OI) is a disorder caused by a mutation in a gene that affects bone formation, bone strength and the structure of other tissues. It basically causes you to have a fragile skeleton. Also called Brittle Bone Disease, sufferers of this disease have extremely brittle and breakable bones.

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If a mixture of gases contained 78% nitrogen at a pressure of 984 torr and 22% carbon dioxide at 345 torr, what is the total pre

AysviL [449]

Answer:

P(total) = 1329 torr

Explanation:

Given data:

Pressure of nitrogen = 984 torr

Pressure of carbon dioxide = 345 torr

Total pressure of system = ?

Solution:

The given problem will be solve through the Dalton law of partial pressure of gases.

According to the this law,

The total pressure exerted by the mixture of gases is equal to the sum of partial pressure of individual gas.

Mathematical expression,

P(total) = P₁ + P₂ +.......+ Pₙ

Here we will put the values in formula,

P₁ = partial pressure of nitrogen

P₂ = partial pressure of carbon dioxide

P(total) = 984 torr + 345 torr

P(total) = 1329 torr

8 0

3 years ago

For the reaction H2(g) + I2(g) 2HI(g), Kc = 50.2 at 445ºC. If [H2] = [I2] = [HI] = 1.75  10-3 M at 445ºC, which one of these st

Soloha48 [4]

Answer: C) The concentration of HI will increase as the system approaches equilibrium.

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_c$

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For the given chemical reaction:

$H_2(g)+I_2(g)\rightarrow 2HI(g)$

The expression for $Q_c$ is written as:

$Q_c=\frac{[HI]^2}{[H_2]^1[I_2]^1}$

$Q_c=\frac{(1.75\times 10^{-3})^2}{(1.75\times 10^{-3})^1\times (1.75\times 10^{-3})^1}$

$Q_c=1.00$

$K_c=50.2$

Thus as $K_{eq}>Q$ , the reaction will shift towards the right i.e. towards the product side.

3 0

4 years ago

Please help me! Thank you so much.

olchik [2.2K]

Answer:

Synthesis :SO3 + H2O —> H2SO4

Single displacement : Pb(NO3)2 + 2NaI —> PbI2 + 2NaNO3

Decomposition : CaCO3 —> CaO + CO2

Combustion : 2ZnS + O2 —> 2ZnO + 2S

Explanation:

8 0

3 years ago

Read 2 more answers

For many years scientists thought that dinosaurs rapidly replaced their ancestors. New information shows that dinosaurs and thei

ololo11 [35]

Answer:

The evidence that is most likely to support the idea that dinosaurs and their ancestors could have coexisted for millions of years is bones of three different species were found in the same rock layer (option D).

Explanation:

Fossils have been the strongest evidence of the existence of extinct species in the remote past. The discovery of some species and their possible ancestors in the same layer of rocks confirms the possibility of the coexistence of evolutionary forms of the same species, for a great period of time.

Once the fossils have been found, paleontologists use molecular genetic techniques to identify the fossils and their relationship with others found in the same place.

The approach suggests that it is not necessary for a species to become extinct in order for its evolutionary descendant to appear, considering coexistence for thousands or even millions of years.

The other options do not provide solid evidence to support this approach.

A. Fewer fossils were found of amphibians than of dinosaurs, which does not specify an evolutionary relationship.

B. More fossils found were of larger organisms than of dinosaurs, which is not true, because species descended from dinosaurs tend to be smaller.

C. Herbivore bones were found in each rock layer, not related to the approach.

8 0

4 years ago

A 1.2 L weather balloon on the ground has a temperature of 25°C and is at atmospheric pressure (1.0 atm). When it rises to an el

musickatia [10]

Answer:

$T_2=335.42K=62.27^oC$

Explanation:

Hello,

In this case, by using the general gas law, that allows us to understand the pressure-volume-temperature relationship as shown below:

$\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}$

Thus, solving for the temperature at the end (considering absolute units of Kelvin), we obtain:

$T_2=\frac{P_2V_2T_1}{P_1V_1}=\frac{1.8L*0.75atm*(25+273.15)K}{1.2L*1.0atm} \\\\T_2=335.42K=62.27^oC$

Best regards.

4 0

3 years ago

Read 2 more answers