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3 years ago

What are two conclusions that Mendal made about his research on genetics

1 answer:

6 0

The two conclusions that Mendal made about his research on genetics depended on the law of segregation and law of independent assortment.

Explanation:

The “law of segregation” says that, pairing of genes (alleles) take place in each parent. During split up, one gene is only passed from each parent to the offspring. But which particular gene is passed is is not know and is completely up to chance.

The “law of independent assortment” states, from all pairs of gene each offspring receives different pair of gene independently. Thus, when a gene is inheritant at one location in a genome it is not necessary that it should influence the inheritance of a gene in another location.

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Who is interested in a middle schooler?

belka [17]

Answer:

I think that middle school teachers are interested in teaching middle schoolers.

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2 years ago

Determine whether the given compound name or formula contains a polyatomic ion. N H 4 C l Choose... Magnesium sulfate Choose...

Morgarella [4.7K]

Answer:

NH₄Cl, Magnesium sulfate, KCN

Explanation:

Determine whether the given compound name or formula contains a polyatomic ion.

NH₄Cl. YES. It contains the polyatomic ion ammonium NH₄⁺.

Magnesium sulfate. YES. It contains the polyatomic ion sulfate SO₄²⁻.

Sodium phosphide Na₃P. NO.

SO₃. NO.

Calcium hydroxide Ca(OH)₂. NO.

KCN. YES. It contains the polyatomic ion cyanide CN⁻.

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2 years ago

What volume would 312g of alcohol occupy

Aleksandr-060686 [28]

Answer:

Density=Mass/volume

0.91g/ml=312g/volume

Volume=343ml

Explanation:

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3 years ago

Determine the molar mass for ammonia (NH3) in g/mol.

navik [9.2K]

Answer:

17.031 g/mol

Explanation:

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3 years ago

A weather balloon is filled with helium that occupies a volume of 5.57 104 L at 0.995 atm and 32.0°C. After it is released, it r

Alchen [17]

6.52 × 10⁴ L. (3 sig. fig.)

<h3>Explanation</h3>

Helium is a noble gas. The interaction between two helium molecules is rather weak, which makes the gas rather "ideal."

Consider the ideal gas law:

$P\cdot V = n\cdot R\cdot T$ ,

where

$P$ is the pressure of the gas,
$V$ is the volume of the gas,
$n$ is the number of gas particles in the gas,
$R$ is the ideal gas constant, and
$T$ is the absolute temperature of the gas in degrees Kelvins.

The question is asking for the final volume $V$ of the gas. Rearrange the ideal gas equation for volume:

$V = \dfrac{n \cdot R \cdot T}{P}$ .

Both the temperature of the gas, $T$ , and the pressure on the gas changed in this process. To find the new volume of the gas, change one variable at a time.

Start with the absolute temperature of the gas:

$T_0 = (32.0 + 273.15) \;\text{K} = 305.15\;\text{K}$ ,
$T_1 = (-14.5 + 273.15) \;\text{K} = 258.65\;\text{K}$ .

The volume of the gas is proportional to its temperature if both $n$ and $P$ stay constant.

$n$ won't change unless the balloon leaks, and
consider $P$ to be constant, for calculations that include $T$ .

$V_1 = V_0 \cdot \dfrac{T_1}{T_2} = 5.57\times 10^{4}\;\text{L}\times \dfrac{258.65\;\textbf{K}}{305.15\;\textbf{K}} = 4.72122\times 10^{4}\;\text{L}$ .

Now, keep the temperature at $T_1 =258.65\;\text{K}$ and change the pressure on the gas:

$P_1 = 0.995\;\text{atm}$ ,
$P_2 = 0.720\;\text{atm}$ .

The volume of the gas is proportional to the reciprocal of its absolute temperature $\dfrac{1}{T}$ if both $n$ and $T$ stays constant. In other words,

$V_2 = V_1 \cdot\dfrac{\dfrac{1}{P_2}}{\dfrac{1}{P_1}} = V_1\cdot\dfrac{P_1}{P_2} = 4.72122\times 10^{4}\;\text{L}\times\dfrac{0.995\;\text{atm}}{0.720\;\text{atm}}=6.52\times 10^{4}\;\text{L}$

(3 sig. fig. as in the question.).

See if you get the same result if you hold $T$ constant, change $P$ , and then move on to change $T$ .

6 0

2 years ago