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kondor19780726 [428]

3 years ago

6

Gamma rays have the highest frequency among all common electromagnetic radiations. It means the gamma rays have the highest ener

gy and the longest wavelength

1 answer:

antiseptic1488 [7]3 years ago

3 0

Answer:

yes

Explanation:

cos of high electron transfer

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What kind of change occurs when I’ve becomes liquid water

gregori [183]

Answer:

Its a physical

theres no chemical properties involved.

Explanation:

Brainliest please

6 0

3 years ago

What is one factor that must be considered when choosing a pesticide to apply?

sasho [114]

Answer:

effect on the environment and/or legality

Explanation:

some pesticides are horrible for the environment and banned

7 0

3 years ago

What is the volume at STP of 3.44 x 1023 molecules of CO2

almond37 [142]

Answer:

C. 12.8 liters.

Explanation:

The Standard Temperature and Pressure (STP) of a gas are 273.15 K and 100 kilopascals. From Avogadro's Law, a mole of carbon dioxide contains $6.022 \times 10^{23}$ molecules. If we suppose that carbon dioxide behaves ideally, then the equation of state for ideal gas is:

$P\cdot V = n\cdot R_{u}\cdot T$ (1)

$P\cdot V = \frac{r\cdot R_{u}\cdot T}{N_{A}}$ (1b)

Where:

$P$ - Pressure, measured in pascals.

$V$ - Volume, measured in liters.

$r$ - Amount of molecules, no unit.

$N_{A}$ - Avogadro's number, no unit.

$R_{u}$ - Ideal gas constant, measured in pascal-liters per mole-Kelvin.

$T$ - Temperature, measured in Kelvin.

If we know that $P = 100000\,Pa$ , $r = 3.44\times 10^{23}$ , $N_{A} = 6.022\times 10^{23}$ , $T = 273.15\,K$ and $R_{u} = 8.314\times 10^{3}\,\frac{L\cdot Pa}{mol\cdot K}$ , then the volume of carbon dioxide at STP is:

$V = \frac{r\cdot R_{u}\cdot T}{N_{A}\cdot P}$

$V = \frac{(3.44\times 10^{23})\cdot \left(8.314\times 10^{3}\,\frac{L\cdot Pa}{mol\cdot K} \right)\cdot (273.15\,K)}{(6.022\times 10^{23})\cdot (100000\,Pa)}$

$V = 12.972\,L$

Therefore, the correct answer is C.

8 0

3 years ago

Identify the balanced chemical equation that represents a combustion reaction. 2C 4H 10 + 13O 2 ⟶ 10H 2O + 8CO 2 C 4H 10 + 5O 2

kati45 [8]

Answer:

2C₄H₁₀ + 13O₂ ⟶ 10H₂O + 8CO₂

Explanation:

2C₄H₁₀ + 13O₂ ⟶ 10H₂O + 8CO₂ . . . . . balanced combustion reaction

C₄H₁₀ + 5O₂ ⟶ 5H₂O + 4CO₂ . . . . not balanced

The two reactions involving Ca are not combustion reactions.

7 0

3 years ago

Which of the following statements is incorrect?

yarga [219]

The correct option is D.
Mole is a measurement used in chemistry which allows us to measure out the same quantity of matter in different substances. Mole allows scientist to measure two substances, for instance, magnesium and sodium, which have equal amount of atoms. Thus, a mole of magnesium contains the same number of atoms as a mole of sodium.

4 0

3 years ago