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4 years ago

14

1. What is the criteria' for designating an object an asteroid?

1 answer:

Natasha_Volkova [10]4 years ago

8 0

Answer:

They are defined as having a minimum orbital intersection distance with Earth of less than 0.05 astronomical units (19.5 lunar distances) and an absolute magnitude of 22 or brighter.

Explanation:

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According to the periodic table, carbon has an atomic mass of 12.011 u. This indicates that the most abundant isotope of carbon

Eduardwww [97]

The most abundant of all of the isotopes of an element will be the one who's mass the mass of element is closest to. In this case, the mass of atomic carbon is closest to the mass of carbon-12.
Thus, Carbon-12 is the most abundant isotope.

3 0

4 years ago

Read 2 more answers

KNO3(s) --> K+(aq) + NO3-(aq)This reaction was carried out in a Styrofoam insulated calorimeter and the following data were r

nataly862011 [7]

Answer:

Equation correctly showing the heat of solution

$KNO_3(s)+35.2 kJ \rightarrow K^+(aq) + NO_{3}^-(aq)$

Explanation:

Mass of aqueous solution = m = 100 g

Specific heat of solution = c = 4.18 J/gºC

Change in temperature = $\Delta T=T_f-T_i$

ΔT = 21.6ºC - 30.0ºC = -8.4ºC

Heat lost by the solution = Q

$Q = mc\Delta T$

$Q=100 g\times 4.18 J/g^oC\times (-8.4^oC)$

Q = -3,511.2 J ≈ -3.51 kJ

Heat absorbed by potassium nitrate when solution in formed; Q'

Q' = -Q = 3.51 kJ

Moles of potassium nitrate , n= $\frac{10.1 g}{101 g/mol}=0.1 mol$

$KNO_3(s)\rightarrow K^+(aq) + NO_{3}^-(aq)$

The heat of solution =

$\frac{Q'}{n}=\frac{3.5112 kJ}{0.1 mol}=35.1 kJ/mol$

So, the equation correctly showing the heat of solution

$KNO_3(s)+35.2 kJ \rightarrow K^+(aq) + NO_{3}^-(aq)$

4 0

4 years ago

luis set a glass of water outside in the sunshine. when he looked at the glass ten minutes later, the contents had changed. what

xeze [42]

Evaporation is the answer

6 0

4 years ago

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There is a part A and B

ladessa [460]

Answer:

Im so confused, and maybe blind bcs I cant read it

Explanation:

Could you explain??

3 0

3 years ago

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Differentiate between acids and bases on the basis of their pH values.

kompoz [17]

Answer:

acid; there ph value is mostly 7

base: there ph value can be more than 7 or less than 7

4 0

3 years ago

Read 2 more answers