Option d: copper.
Because copper is an element, not a mixture.
Answer:
The original concentration of the acid was 0.605 M
Explanation:
Step 1: Data given
Volume of gas = 177.6 mL = 0.1176 L
Temperature = 25.8 °C = 298.95 K
Pressure = 799.7 torr = 799.7/ 760 = 1.0522368 atm
Volume of acid needed to react = 12.6 mL = 0.0126 L
Step 2: Calculate moles
p*V = n*R*T
n = (p*V)/(R*T)
⇒with n = the number of moles = TO BE DETERMINED
⇒with p = the pressure of the gas = 799.7 torr = 1.0522368 atm
⇒with V = the volume of the gas = 177.6 mL = 0.1776 L
⇒with R = the gas constant = 0.08206 L*atm/mol*K
⇒with T = the temperature = 25.8 °C = 298.95 K
n = 0.007618 moles
Step 3: Calculate original concentration
We need 0.007618 moles of acid to react with the same amount of moles gas
Concentration acid = moles / volume
Concentration acid = 0.007618 moles / 0.0126 L
Concentration acid = 0.605 M
The original concentration of the acid was 0.605 M
True I think is the answer
Answer: See explanation
Explanation:
The negative effects of video games include:
1. Social disconnection- One negative effect of video games is that it brings about social disconnection. Video games are typically addictive and this leads to the individual playing the game gradually disconnecting from the social life. Such people tends to play games rather than having conversations with their friends or family members.
2. Addiction - Video games are addictive which can lead to depression or bring about mental health disorder.
3. Wrong values - Some video games instill wrong values in children. Such values include violence, aggression and vengeance.
4. Negative academic achievement - Students who play video games a lot tend to have a negative academic achievement as the time they could have used in reading or studying is used for playing games and thus tends to have an effect on the performance in school.
5. Health hazards- Video games may lead to health hazards- such as nerve compression, obesity, and video-induced seizures.
The positive effect of video games are:
1. Problem solving - Video games train ones brain to be creative and also come up with solution to challenges.
2. Quick thinking - Video games help one to think quickly in order to solve challenges and overcome obstacles.
3. Create positive emotions - Easy games can bring about positive emotions and uplift ones mood, and help in promoting relaxation.
4. Stimulate learning - Playing video games can help an individual to learn new skills.
The answer is B. is the energy source of stars.
Fission is the type of nuclear energy simulated on Earth, as it is the one used to generate electricity. Fusion, on the other hand, is much more complicated to achieve because it requires extremely hot temperatures compared to fission. Fusion involves the combination of two hydrogen atoms to make helium, which releases a lot of energy. Stars such as the sun, exhibit fusion with its very hot temperature and abundant source of hydrogen.
