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4 years ago

Which one of the following questions about animals called affairs, pictured above, is the scientific question?

Chemistry

1 answer:

tino4ka555 [31]4 years ago

3 0

The answer is B...

because any of the others could have an opinion based answer but B will always be the same its a fact not opinion.

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List of 10 strong bases and acids?

tatyana61 [14]

KaAcid1.0 * 109Hydrobromic acidHBr1.3 * 106Hydrochloric acidHCl1.0 * 103Sulfuric acidH2SO42.4 * 101Nitric acidHNO3

4 0

3 years ago

The process n01 → p11 + β−10 n 0 1 → p 1 1 + β - 1 0 represents a(n) _____.

polet [3.4K]

Answer:

beta decay

Explanation:

The process is represented by the nuclear equation:

$^1_0n$ → $^1_1p+^0_{-1}\beta$

Where:

n represents a neutron,
p represents a proton, and
β represents an electron.

The superscripts to the leff of each symbol is the mass number (number of protons and neutrons), and the subscript to the left means the atomic number (number of protons).

Then, in this process a neutron is being transformed into a proton by the emssion of an electron (from inside the nucleus of the atom).

This electron is named beta (β) particle, and the process is called beta decay, because the neutron is changing into other subatomic particles.

5 0

4 years ago

The activation energy for the reaction NO2 (g )+ CO (g) ⟶ NO (g) + CO2 (g) is Ea = 218 kJ/mol and the change in enthalpy for the

madreJ [45]

Answer:

$470\frac{KJ}{mol}$

Explanation:

The activation energy represents the energy barrier that reagents must pass to transform into products (or products to transform into reagents in a reverse reaction)

For any reaction, the change in enthalpy is related to the activation energy by the equation

$\Delta H =E_{a\ direct}-E_{a\ reverse}$

So, the activation energy for the reverse reaction is

$E_{a\ reverse}=E_{a\ direct}-\Delta H =218 \frac{KJ}{mol} - (-252)\frac{KJ}{mol}=470\frac{KJ}{mol}$

4 0

3 years ago

The empirical formula of styrene is ch; its molar mass is 104.1 g/mol. what is the molecular formula of styrene? select one:

Nuetrik [128]

The empirical formula is a formula of a compound showing the proportion of each element involved in the compounds but it does not represent the total number of atoms in the compound. It is the lowest number of ratio between the elements in the compound. In order, to determine the actual number of the atoms or the molecular formula of the compounds, we make use of the molar mass of the compound.

To determine the molecular formula, we multiply a value to the empirical formula. Then, calculate the molar mass and see whether it is equal to the one given (104.1 g/ mol). From the choices, the only valid options are b, d and e.
 molar mass
1 CH 13.02
8 C8H8 104.16
6 C6H6 78.12

Therefore the correct answer is option B.

6 0

3 years ago

Read 2 more answers

9. To become like a noble gas the element P will have a charge of

MrRa [10]

Answer:

to become a noble gas element P will have 2 electrons in it's outer most energy level if it has one energy level

and eight in the last energy level if more than one

6 0

3 years ago