- How much heat in joules and in calories must be added to a 75.0-g iron block with a specific heat of 0.449
j/g Celsius degree to increase its temperature from 25 degree Celsius to its melting temperature of 1535
- An aluminum kettle weighs 1.05 kg
a. What is heat capacity of the kettle?
b. How much heat is required to increase the temperature of this kettle from 23.0 Celsius degree to 99.0
c. How much heat is required to heat this kettle from 23.0 Celsius to 99.0 degree Celsius if it contains 1.25 L of
water (density of 0.997 g/mL and a specific heat of 4.184 J/g Celsius degree?
- A 45-g aluminum spoon ( specific heat 0.88 J/g degree Celsius) at 24 degree Celsius placed in 180mL
(180g) of coffee at 85 degree Celsius and the temperature of the two become equal.
a. What is the final temperature when the two become equal? Assume that coffee has the same specific heat
b. The first time a student solved this problem she got an answer of 88 degree Celsius. Explain why this is
clearly an incorrect answer.
- When 1.0 g of fructose C6H12O6(s) a sugar commonly found in fruits is burned in oxygen in a bomb
calorimeter the temperature of the calorimeter increases by 1.58 degree Celsius. If the heat capacity of the
calorimeter and its content is 9.90 kJ/ degree Celsius what is q for this combustion?
- How much heat is produced by combustion of 125 g of methanol under standard state conditions?
- Calculate (it looks like a slated triangle next to this equation) H298 (there is a degree sign next to the h) for
the process Zn(s) + S(s)+ 2O2(g)——->ZnSO4(s)
from the following information
Zn(s) + S(s)——-> ZnS(s) (slated triangle)H298 (there is a degree sign next to the h)= -206.0kJ
Zns(s) + 2O2(g)——>ZnSO4(s) (slated triangle)H298 (there is a degree sign next to the h)= -776.8kJ
- Answer the following questions about a Blu-ray laser
a. The laser on a Blu-ray player has a wave length of 405nm. In what region of the electromagnetic spectrum is
this radiation? What is its frequency?
b. A Blu-ray laser has a power of 5 milliwatts (1 watt= 1 J s-1) How many photons of light are produced by the
laser in 1 hour?
c. The ideal resolution of a player using a laser (such as a Blu-ray player) which determines how close together
data can be stored on a compact disk is determined using the following formula Resolution = 0.60(NA) where A
is the wavelength of the laser and NA is the numerical aperture. Numerical aperture is a measure of the size of
the spot light on the disk ; the larger the NA the smaller the spot. In a typical Blu-ray system NA= 0.95 if the
405-nm laser is used in a Blu-ray player, What is the closest that information can be stored on a Blu-ray disk?
d. The data density of a Blu-ray disk using a 405-nm laser is 1.5×107 bits mm-2. Disks have an outside
diameter of 120mm and a hole of 15-mm diameter. How many data bits can be contained on the disk? If a Bluray disk can hold 9,400,000 pages of text how many data bits are needed for a typed page?
- Using the Bohr model , determine the lowest possible energy in joules for the electron in the Li2+ ion.
- Using the Bohr model, determine the energy in joules of the photon produced when an electron in a He+
ion moves from the orbit with n=5 to the orbit with n=2
- What are the allowed values for each of the four quantum numbers n, l, ml, and ms?
- State the Heisenberg uncertainty principle. Describe briefly what the principle implies
54 Using complete subshell notation (1s2 2s2 2p6, and so forth) predict the electron configuration sof the
10/4/2020 Order 327361246
c. Sd. Cs2+
f Gd 3+
Neighborhood people group ought to agree to government laws and homegrown guidelines. However long they meet the prerequisites of these chances, everybody has equivalent open doors for a mind-blowing duration. Individuals who are qualified and give a valiant effort for the network lead the network. Society depends on choice, except if rules are watched and nobody is harmed. Rules and guidelines are intended to secure individuals of the general public so as to assemble a sheltered and amicable network. There are two fundamental sorts of network networks, networks characterized by geologically characterized networks and topographically various factors. Instances of geologically characterized networks are networks or local locations. The accumulated houses share a typical space. Nearby economies and territorial organizations are additionally viewed as a component of the neighboring network. Individuals from the network are invested individuals in network wellbeing, and I am keen on this What is a network? Parker characterizes the network as individuals who share a typical space or area, share a typical relationship, connect with one another, and are generally utilized in the writing (Fritz, 1985). The people group comprises of common commitments and communications connecting people to foundations and relationship organizations. In most topographical networks, there is a typical association and a pretty much free network. Schools, law requirement offices, and social government assistance offices are three instances of formal associations inside the network that are especially significant for substance misuse. Guardians and understudy associations vary in structure, regular to most networks, and can assume a significant function in forestalling drug misuse. Local gatherings and individuals from the association cooperate to make, characterize, and take care of social issues by connecting with one another.The thought that the network affects the arrangement of character is the way to Pythia Peay's article "Soul Searching" and Winona LaDuke's meeting. "The two creators who keep up the network introduced comparable perspectives and alternate points of view by living in the network and turning out to be individuals from the network and influencing individuals in the network. I experienced a month to month or yearly gathering, and they accounted for themselves as networks: the Network Summit Community, the TEDx Community, the SxSW Community and the New York Tech Party Community. I have asked myself as an exploration network and as a member in a large number of these exercises: are these exercises really a network? What is the limit between standard social affairs/get-togethers/gatherings and the network? The greatest contrast is that the occasion is exceptionally useful for individuals to construct an individual 1: 1 relationship. There might be significantly more. Then again, the intensity of the network lies in aggregate personality. We see ourselves as a gathering having a place with one gathering and we confide in one another over the normal level. Our exercises are little, yet the network is enormous. As an augmentation of the occasion insight, I made a Slack people group. Emotionally supportive network consistently. Any female business visionary or financial specialist is welcome. In spite of the fact that the historical backdrop of this network is just three months, intrigue and cooperation was great. As we get familiar with the necessities and requirements of this network, we will proceed to adjust and develop and keep on giving assets, data and availability on the web. We should join our locale. Our message network has more than 7,500 individuals, and we have another Discord channel with in excess of 1,000 individuals. In the event that you need to enroll on Slack (12,000 clients and engineer network landing page), kindly use @ thisis to send email address to message. The enrollment of the Public Slack is as yet shut. For more significant declarations on Enigma, follow this blog and our Twitter. At the point when we manufacture arrangements and stages to enable us to develop, our prosperity is firmly identified with our locale backing and cognizance. We will effectively share the most recent data on the network and news and advancement consistently. You can assist us with publicizing our undertaking and vision on your organization. Declining Drug Abuse: Sociological Strategy for Community Social Practice W. David Watts South West Texas State University Techniques for network based sociological practice are examined. With regards to social development of sensible speculations, the function of sociologists in helping networks comprehend social issues has been dissected. When the network acknowledges adolescents 'substance misuse issues, the hypothesis of control and partners' affiliation can lead sociologists who wish to work with nearby pioneers to battle drug misuse. Network association, reinforce the association among guardians and different gatherings, bring down the network's capacity to bear drug misuse, construct uphold for peer anticipation Declining Drug Abuse: Sociological Strategy for Community Social Practice W. David Watts South West Texas State University>GET ANSWER