<span>Homeostasis is the upkeep of a consistent inner state in an evolving situation. So as to survive the underneath ought to be required: [1]your cells should have the capacity to get and utilize vitality [2]make new cell [3]exchange materials [4]and wipe out squanders.</span>

5 0

4 years ago

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Which of these elements is a noble gas? A. hydrogen (H) B. barium (Ba) C. nitrogen (N) D. krypton (Kr) E. bromine (Br)

Novosadov [1.4K]

Krypton is a noble gas! Hope this helps!

5 0

3 years ago

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Drag the correct symbol to the equation. Not all symbols will be used. A plutonium atom undergoes nuclear fission. Identify the

Naya [18.7K]

Answer:

$_{40}^{103}Zr$

Explanation:

For any nuclear equation, we should utilize the law of mass conservation and the law of charge conservation. The sum of the masses on the left-hand side of the arrow should be equal to the sum of the masses on the right-hand side of the arrow (those are the superscripts for each nucleus). Similarly, the sums of charges should be equal (this is the law of charge conservation).

Let's say that the missing species is X with a mass of 'M' and charge of 'Z':

$_{94}^{239}Pu+_0^1n\rightarrow _Z^MX+_{54}^{134}Xe+3_0^1n$

Find mass applying the mass balance law:

$239+1=M+134+3\cdot1\\240 = M+137\\M=240 -137\\M=103$

This means our particle X has a mass of 103. Let's find the atomic number (the charge) same way:

$94+0=Z+54+3\cdot0\\94=Z+54\\Z=94-54=40$

The atomic number of our nucleus is 40. That said, we have:

$_{40}^{103}X$

Find the element in the periodic table with Z = 40. This is Zr. Meaning we can now identify it fully:

$_{40}^{103}Zr$

5 0

4 years ago

A sample of gas contains four gases (He, Ne, Ar, and Xe) with the following partial pressures: He (43 mm Hg), Ar (835 mm Hg), an

DIA [1.3K]

Answer:

Partial pressure of Ne = 366 mmHg

Explanation:

In a mixture, the sum of partial pressures for each gas, is the total pressure for the system.

Partial pressure He: 43 mmHg

Partial pressure Ar: 835 mmHg

Partial pressure Xe: 111 mmHg

Partial pressure Ne: ?

Total pressure = 1355 mmHg

43 + 835 + 111 + x = 1355

989 + x = 1355

x = 1355 - 989 → 366

6 0

3 years ago