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nata0808 [166]
3 years ago
6

. If 69.15% exists as 63Cu with an atomic mass of 62.92, then what is the atomic mass of the second isotope?

Chemistry
1 answer:
Alexeev081 [22]3 years ago
8 0

Answer: 64.8

Explanation:Please see attachment for explanation

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A chemist wishes to perform the following reaction: N2 + 3 H2 → 2 NH3 If only 14.0 g of N2 is available, what is the minimum amo
djyliett [7]

Answer:

3 grams

Explanation:

14 g of N2   is 1/2 mole

  If you halve the N2   in the balanced equation , you have to halve the H2 down to 1.5 moles of H2    which is 3 grams

4 0
2 years ago
What does an atomic number represent in an atom? 1. Number of protons 2. Number of electrons. 3. Number of neutrons. 4. Number o
WINSTONCH [101]

4: The mass amount of protons and neutrons in an atom

We just covered this in my chem class

5 0
4 years ago
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Determine if the individual bonds in each compound are polar or nonpolar.
almond37 [142]

Answer:

See explanation

Explanation:

For SCl2

S = 2.8, Cl = 3.16 difference = 0.4 polar

H2S

H = 2.2  S= 2.8  difference = 0.6  polar

CF4

C = 2.55,  F= 3.98 difference = 1.43

This compound is nonpolar irrespective of the difference in electronegativity because the molecule is symmetrical

PCl5

P= 2.19,  Cl= 3.16  difference = 0.97

This compound is nonpolar irrespective of the difference in electronegativity because the molecule is symmetrical

CH4

C = 2.55    H = 2.2    difference = 0.35 the molecule is nonpolar

CaBr2

Ca= 1    Br= 2.96  difference = 1.96

The compound is not just polar but ionic in nature due to large electronegativity difference between the bonding atoms

SF2

S = 2.8   F= 3.98     difference = 1.18

The molecule is polar

CO2

C= 2.55    O= 3.44  difference = 0.89

This compound is nonpolar irrespective of the difference in electronegativity because the molecule is symmetrical

NH3

N= 3.04     H = 2.2    difference =0.84

The molecule is polar

NaS

Na= 0.93   S = 2.8    difference = 1.87

The compound is not just polar but ionic in nature due to large electronegativity difference between the bonding

4 0
3 years ago
What is the mass of copper that increases its temperature by 285 degrees celsius when 186,000 j of energy is applied?
Llana [10]
From reliable sources in the web, it may be searched that the specific heat of copper is approximately equal to 0.385 J/gC. The amount of heat that is required to raise a certain amount by certain number of degrees is given in the equation,
                              H = mcpdT
where H is heat, m is mass, cp is specific heat, and dT is temperature difference. Substituting the known values,
                           186,000 J = (m)(0.385 J/gC)(285C) 
                                     m = 1695.15 g
3 0
3 years ago
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can the list below. Which did you include in your answer? Foam is a colloid. Colloids include gas dispersed in a liquid. Colloid
VikaD [51]

Answer:

Its all of them

Explanation:

4 0
3 years ago
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