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Lelu [443]
3 years ago
8

Answer with correct significant figures (*no scientific notation): 847.3219 x 34.6 x 1.4560 =

Chemistry
1 answer:
nordsb [41]3 years ago
5 0

Answer:

42686.04375

Explanation:

Multiply 847.3219 by 34.6 to get 29317.33774, then multiply this answer by 1.4560 to get the final answer which is 4286.04375.

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What is the result of multiplying 2.55 x 10^10 m x 3.5 x 10^-7m using proper significant figures and scientific notation.
BartSMP [9]
3 I think I’m sure much love
3 0
3 years ago
How will the temperature of the surface change?
kogti [31]

Answer:

o Surface Type- Because the atmosphere is heated by the Earth's surface, the surface type plays an important role in the surface air temperature. o Elevation and Aspect- Higher altitude generally has colder temps b/c the air is less dense and there are fewer molecules to absorb incoming solar radiation.

The Earth's surface is actually what heats the air above it.  

Explanation:

The energy from the sun is "short-wave", and as such air is transparent to it. The sunlight goes right through the air without heating it at all. This "short-wave" radiation is absorbed by the Earth which then heats up. The heated Earth then emits it's own radiation but it is in the infrared part of the spectrum or "long-wave" radiation. This heat is what warms the atmosphere.

4 0
3 years ago
How many grams of NH3 will have the same number of molecules as 26.2 g of C6H?
Effectus [21]

Answer: 2 grams

Explanation:

chemical formula of C6H:

C6H

relative atomic mass of

C:12

H:1

C6:72

H1:12

relative formula mass of

C6H1=73

molar mass of glucose:

73g

the molar mass is the mass of one mole of a substance.

in

26.2g

of C6H there are

26.2 divide by 73g moles present.

there are 0.358 or 35.8*10-1

I gram of NH3 is 17.03052

2 grams of NH3 is 35

3 0
4 years ago
It is believed that two C-12 nuclei can react in the core of a supergiant star to form Na-23 and H-1. Calculate the energy relea
Leno4ka [110]

Answer:

c. 2.16 × 10^8 kJ

Explanation:

In the given question, 2 C-12 nuclei were used for the reaction and the mass of C-12 is 12.0000 amu. Therefore, for  2 C-12 nuclei, the mass is 2*12.0000 = 24.0000 amu.

In addition, a Na-23 and a H-1 were formed in the process. The combined mass of the products is 22.989767+1.007825 = 23.997592 amu

The mass of the reactant is different from the mass of the products. The difference = 24.0000 amu - 23.997592 amu = 0.002408 amu.

Theoretically, 1 amu = 1.66054*10^-27 kg

Thus, 0.002408 amu = 0.002408*1.66054*10^-27 kg = 3.99858*10^-30 kg

This mass difference is converted to energy and its value can be calculated using:

E = mc^2 = 3.99858*10^-30 *(299792458)^2 = 3.59374*10^-13 J

Furthermore, 1 mole of hydrogen nuclei contains 6.022*10^23 particles. Thus, we have:

E = 3.59374*10^-13 * 6.022*10^23 = 2.164*10^11 J = 2.164*10^8 kJ

4 0
4 years ago
When one mole of sodium chloride dissociates in water, it produces: 1 mole of ions ½ mole of sodium ions 2 moles of ions ½ mole
adelina 88 [10]
Dissociation of NaCl in water is given as below,

                             NaCl ₍s₎    →    Na⁺ ₍aq₎  +  Cl⁻ ₍aq₎

According to this balanced equation the moles on RHS and LHS are as,

Moles on LHS,
                           NaCl ₍s₎   =   1 Mole

Moles on RHS,
                          Na⁺ ₍aq₎   =   1 Mole

                           Cl⁻ ₍aq₎   =    1 Mole
Result:
           
<span>When one mole of sodium chloride dissociates in water, it produces 2 Moles of Ions.</span>
7 0
3 years ago
Read 2 more answers
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