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Juliette [100K]
4 years ago
13

Which of the following halogens would have the highest melting point?

Chemistry
1 answer:
anygoal [31]4 years ago
7 0
Answer: d. I2

The melting and boiling points increase down a group
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What are the major problems associated with the production of nuclear energy?
Sindrei [870]

Answer:

• long time lag between planning and operation.

• cost.

• weapons proliferation risk.

• meltdown risk.

• mining lung cancer risk.

• carbon-equivalent emissions and air pollution.

• waste risk.

Explanation:

hope this help <33

7 0
3 years ago
A sample of 54.0 g of methanol is heated from 25.0 °c to 35.0 °c. how much heat is required? the specific heat capacity of metha
LUCKY_DIMON [66]
The  amount of heat required   is calculated  using the below  formula

Q(heat) =M(mass) xC(specific heat capacity)x delta T (change in temperature)

change in the temperature in kelvin=(35+273)- (25 +2730= 10K
c= 2.48 j/g/k
mass= 54.0 g

Q= 54.0 g x 2.48 j/g/k x 10k  = 1339.2  joules is required
3 0
4 years ago
What is the molecular formula of a molecule that has an empirical formula of CH and a molecular mass of 78.11 g
sveticcg [70]

Answer: C6H6

Explanation: Molecular Formula is the molecular mass divided by the empirical formula mass of CH which is C 12and H is 1 so 12 + 1= 13 g CH

Solution:

78.11 g CH / 13 g CH = 6

5 0
3 years ago
You have 15.0 L of nitrogen gas at 100°C and 200 kPa. What volume of gas will you have at STP?
Pavel [41]
Actually, you do NOT need to calculate the number of moles, so you do NOT need to convert the volume and pressure. (You DO have to convert the temperature.) That's because for this problem, pV/T is constant, so the units cancel (but the temperature scale matters). 

<span>200kPa * 15L / 373K = 101kPa * V / 273K </span>
<span>V = 21.7 L </span>
7 0
4 years ago
How many atoms are present in 4.0 mol of sodium
gladu [14]
Avogadro's constant is the number of atoms of carbon-12 in 12g of
carbon-12.
atoms present equals avogadro's constant times number of moles for that substance. Type of substance does not change the number of atoms if you are given the quantity of moles, therefore the fact that it is sodium does not change the value.
<span>atoms present equals avogadro's constant times number of moles
</span>=6.023x10^23 x 4.0
=2.4x10^24
4 0
3 years ago
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