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Citrus2011 [14]
3 years ago
12

Fill in the blanks with the word bank. !!URGENT NEED TODAY!!

Chemistry
1 answer:
stiv31 [10]3 years ago
6 0

blank 1: lost

blank 2: gained

blank 3:  same

blank 4: side

blank 5: equation

blank 6: coefficients

blank 7: formulas

blank 8: change

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What is the mass in grams for a piece of lead that has a volume of 14.8 cubic centimeters? The density of lead is 11.4 g/cc.
Oksi-84 [34.3K]

Answer:

168.72 grams

Explanation:

Density = Mass/Volume

Volume = 14.8

Mass = ?

Density = 11.4

Let x = mass

11.4 = x/14.8

Multiply both sides by 14.8

14.8(11.4 = x/14.8)

x = 168.72

8 0
3 years ago
The same heat transfer into identical masses of different substances produces different temperature changes. Calculate the final
myrzilka [38]

Answer: final temperatures will be

a) water 21 C

b) concrete  20.005 C

c) steel   20.008 C

d) mercury  53 C

Explanation:

Change in temp dT = dH / (mass x specific heat)

Specific heat of these materials can be found from many sources:

water = 1 kcal / kg C

concrete = 210 kcal / kg C

steel = 114 kcal / kg C

mercury = 0.03 kcal /kg C

So dT (water) from 1 kcal heat into 1 kg water = 1 kcal / (1 kg x 1 kcal/kg C) = 1 C therefore the final temperature is 20 + 1 = 21 C

But dT (steel) = 1 kcal / (1kg x 114 kcal/kg C) = 0.008 C so the final temperature is 20 + 0.008 = 20.008 C

The results for concrete and mercury are calculated in the same way

7 0
3 years ago
An experimenter performs a RICS experiment using a mixture (mixture 1:1 of monomers and tetramers, with a total concentration of
ICE Princess25 [194]

Answer:

Raster Image Correlation Spectroscopy (RICS) is a novel new technique for measuring molecular dynamics and confocal fluorescence imaging concentrations. RICS technique extracts information on molecular dynamics and concentrations of live cell images taken in commercial confocal systems

Explanation:

RICS analysis must be performed on images acquired through raster scanning. Laser scanning microscopes generate images by measuring the fluorescence intensity in one area of ​​a pixel at a time (a 'pixel' in this context does not have the same definition as a pixel in computer graphics, but refers to a measurement of localized intensity). The value of a pixel is obtained by illuminating a region of the sample with the focal volume of a laser beam and measuring the intensity of the fluorescence emitted. The laser beam moves to a new location and a new pixel is recorded. Each pixel can be considered to correspond to a region of the sample, with its width (called pixel size) defined by the distance the beam moves between measurements. This means that the size of a pixel is separate and independent from the size of the focal volume of the laser beam.

4 0
3 years ago
What is the charge of the ions formed by Na and by Cl?
Alexxandr [17]

Answer:

Na+ is positively charged as it loses an electron

Cl- is negatively charged as it gains an electron

3 0
3 years ago
Give an example of a change that would be a chemical change but not a physical change.
Annette [7]

Answer:

digesting food

Explanation:

you dont see it

4 0
3 years ago
Read 2 more answers
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