Answer:
1. False
2. True
3. True
4. True
5. True
6. True
7. True
8. False
9. True
Explanation:
Density is a physical property since its measurement does not involve any chemical process.
Since transition elements exhibit variable oxidation states, the actual oxidation state of the transition element must be specified in the compound.
Due to the fact that neutron has no charge, it was discovered by Chadwick long after the electron and proton were discovered.
The balancing of chemical reaction equations is a demonstration that atoms are neither created no destroyed. It also shows that mass is neither created nor destroyed in chemical reactions.
When a gas is heated, it expands. Its volume and its kinetic energy increases. Since volume and pressure are inversely proportional (Boyle's law) the pressure decreases.
Enthalpy is said to be an extensive property. This implies that the magnitude of change in enthalpy is known to depend on the amount of reactants that is actually reacted.
The combined gas law is applicable to all ideal gas systems irrespective of their individual chemical formulas.
10g of CO2 contains 0.227 moles of CO2 while 10g of NO contains 0.33 moles of NO hence 10.0 g of NO will contain more molecules than 10.0g of CO2.
If a sample is not at absolute zero, the particles are known to possess kinetic energy which decreases continuously until absolute zero is attained.
The Scientific Notation of Xenon’s density : 1.31293 × 10²
<h3>Further explanation</h3>
Scientific Notation consists of 2 parts
1. the first part: the first digit followed by the decimal point
2. The second part: the power of 10 which shows the number of digits after the decimal point
Xenon's density = 131.293
First digit = 1, then we give the decimal point and the next digit
The power of 10 is determined from the number of decimal points moved from the original decimal point
Because we move the decimal point two digits to the left, the power of 10 has the number 2 (10²)
So that the Scientific Notation form becomes:
1.31293 × 10²
D. the mass and number of atoms and the elements will always and must be equal on both sides of the equation, mass can not be destroyed, only conserved
Answer:
T = 42.08 °C
Explanation:
Using the expression,
Wherem
is the activation energy
R is Gas constant having value = 8.314 J / K mol
Thus, given that, = 45.6 kJ/mol = 45600 J/mol (As 1 kJ = 1000 J)
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
So,
T = (30 + 273.15) K = 303.15 K
So,
Conversion to °C as:
T(K) = T( °C) + 273.15
So,
315.23 = T( °C) + 273.15
<u>T = 42.08 °C</u>
Answer:
color the star with some spacey color(purpel, lavender, white spots)
You can also cover the rest of paper with different objects from space :)
Explanation:
