Answer:
Oxygen has 8 neutrons
Explanation:
We know that cause the atomic number says how many protons does the element has, so in this case is eight, and in the mass number, we have the number of protons+neutrons, in this case is 16. Then, as we know that oxygen has eight protons with the atomic number, we would do 16-8 protons= 8 neutrons.
Check: Atomic number is 16= 8 protons + 8 neutrons
Answer:
378.25°C
Explanation:
Given data:
Number of moles of gas = 0.750 mol
Volume of gas = 35.9 L
Pressure of gas = 114 KPa (114/101 = 1.125 atm)
Temperature of gas = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
now we will put the values.
T = PV/nR
T = 1.125 atm × 35.9 L /0.750 mol × 0.0821 atm.L/ mol.K
T = 40.3875/0.062/K
T = 651.4 K
Kelvin to °C:
651.4 K - 273.15 = 378.25°C
Answer:
The chemical name for the compound formula NaCl is sodium chloride.
Answer:
Number of delocalized electrons
Explanation:
Magnesium has more delocalized electrons compared to sodium and this accounts for the higher melting point.
- When magnesium atoms comes together to form a metallic bonds, they have more network of delocalized electrons.
- There is more pull for the localized electrons due to the nuclear charge on the nucleus.
- This strong intermolecular metallic bond increases the melting point of magnesium.
Answer:
When swallowed, the signs and symptoms may include:
Severe burning and associated pain in the mouth, throat, and food-pipe
Drooling from the mouth
Loss of vision; unable to speak
Inflammation of the throat may cause respiratory difficulties
Sudden reduction in blood pressure (hypotension)
Vomiting blood
On skin contact, the signs and symptoms may include:
Severe skin and tissue burns associated with pain
Severe eye burns associated with pain; loss of vision
When inhaled, the signs and symptoms may include:
Coughing (including coughing-up blood), choking
Heaviness in the chest; chest pain
Bluish discoloration of lips and beneath fingernails
Respiratory difficulties
Reduced blood pressure (hypotension)
Headache and weakness
Increased heart-rate
Collapse
Explanation:
