Answer:
Dependent variable are those variables that changes with the change in variables that affects it. (IG - leo_muan)
Explanation:
Dependent variable responds or gets affected to change. They are not constant. It can be possible that dependent variable is relying on independent variable as independent variable does not change with change of any of the factor in an experiment.
Sometimes, mentioning not the units leads to insufficient data of the variables. A constant is something whose value cannot be changed and is used for comparison purpose. According to the question, Rose is constant, height is dependent variable , different types of soil are independent variable.
The temperature change on a 150g sample of mercury with specific heat of 0.0330 Cag°C, If 480 cal of heat is added to it is 96.9°C.
<h3>How to calculate temperature change?</h3>
The temperature change of a substance can be calculated using the following formula:
Q = m × c × ∆T
Where;
- Q = quantity of heat absorbed or released
- m = mass of substance
- c = specific heat capacity
- ∆T = change in temperature
480 = 150 × 0.033 × ∆T
480 = 4.95∆T
∆T = 96.9°C.
Therefore, the temperature change on a 150g sample of mercury with specific heat of 0.0330 Cag°C, If 480 cal of heat is added to it is 96.9°C.
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Answer:
The order is
Quartz > Calcium > Ammonia > Chlorine
Explanation:
Among given compounds
Quartz is a covalent compound with extensive bondings and thus it will have highest melting point
Calcium is a metal so it will have strong metallic bonds thus will have high melting point, however less than quartz.
ammonia is a polar molecule with weak hydrogen bond as intermolecular interactions thus will have higher melting point than chlorine
chlorine is a non polar molecule with weak intermolecular london dispersion forces.
Son átomos que tienen el mismo número atómico, pero diferente masa atómica. Es decir, contienen el mismo número de protones pero difieren en el número de neutrones. Como ejemplo, tendríamos el Hidrógeno y sus 3 isótopos, el Protio, el Deuterio y el Tritio.
Answer:
- <u><em>34 g of NH₃ </em></u><em>will be produced from the reaction of 28 g of N₂ with 25 g of H₂.</em>
Explanation:
1) <u>Balanced chemical equation</u>
- N₂ (g) + 3H₂ (g) → 2NH₃(g)
2) <u>Stoichiometric (theoretical ) mole ratios</u>
- 1 mol N₂ (g) : 3mol H₂ (g) : 2 mol NH₃(g)
3) <u>Number of moles of each reactant</u>
- number of moles = mass in grams / atomic mass
- number of moles of N₂ = 28 g / 28 g/mol = 1 mol
- number of moles of H₂: 25 g / 2 g/mol = 12.5 mol
4)<u> Limiting reactant</u>
Since the stoichiometry states that 1 mol of N₂ reacts with 3 moles of H₂, the given mass of N₂ will react completely with the given amount of H₂, and the calculations must be done with the 28 g (1 mol) of N₂ as the limiting reactant.
5) <u>Yield</u>
Set the proportion with the mole ratios:
1 mol H₂ / 2 mol NH₃ = 1 mol H₂ / x ⇒ x = 2 mol NH₃
6) <u>Convert to grams</u>
- mass in grams = number of moles × molar mass = 2 mol × 17 g/mol = 34 g.
Answer: <em>the reaction of 28 g of N₂ with 25 g of H₂ will produce 34 g of NH₃</em>