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dolphi86 [110]
3 years ago
11

Help ASAP I will mark brainliest for the correct answer !!!⚡️✨

Chemistry
1 answer:
Artist 52 [7]3 years ago
3 0

Answer:

10623 km

Explanation:

3541 x 3 hours

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Which elements are out of order in terms of atomic mass. co,Ni or Li,be or I,xe​
valkas [14]

Answer:

The pair co,Ni is out of order in terms of atomic mass

Explanation:

For co,Ni

Atomic mass of Co = 58.9331 u

Atomic mass of Ni = 58.6934

For Li,be

Atomic mass of Li = 6.941 u

Atomic mass of  be = 9.012182 u

For I,xe

Atomic mass of I =  126.90447 u

Atomic mass of Xe = 131.293 u

Hence, the pair co,Ni is out of order in terms of atomic mass

7 0
3 years ago
Calculate the standard enthalpy change for the reaction at 25 ∘ C. Standard enthalpy of formation values can be found in this li
Anastasy [175]

Answer:

-179.06 kJ

Explanation:

Let's consider the following balanced reaction.

HCl(g) + NaOH(s) ⟶ NaCl(s) + H₂O(l)

We can calculate the standard enthalpy change for the reaction (ΔH°r) using the following expression.

ΔH°r = 1 mol × ΔH°f(NaCl(s)) + 1 mol × ΔH°f(H₂O(l)) - 1 mol × ΔH°f(HCl(g)) - 1 mol × ΔH°f(NaOH(s))

ΔH°r = 1 mol × (-411.15 kJ/mol) + 1 mol × (-285.83 kJ/mol) - 1 mol × (-92.31 kJ/mol) - 1 mol × (-425.61 kJ/mol)

ΔH°r = -179.06 kJ

7 0
3 years ago
HELP please! Which of these describes how heat is transferred by conduction
VLD [36.1K]
D. Air molecules touch the warm ground, heating them up
3 0
3 years ago
Soda water is water that has bubbles of carbon dioxide in it,
Elan Coil [88]

Answer:

I think mixture

Explanation:

Mixture because it is a mixture of water and carbon

3 0
3 years ago
Read 2 more answers
What can not be separated easily or, sometimes at all
BabaBlast [244]
Pure Substances cannot be separated easily or, sometimes at all.

I hope this is the answer you were looking for and that it helps!! :)
8 0
3 years ago
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