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Mademuasel [1]
3 years ago
6

HELP PLEASE!!!!!!!

Chemistry
1 answer:
ololo11 [35]3 years ago
8 0

Answer:

    Try a grams calculator, Its pretty to nd one :D

Explanation:

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How many water molecules are need to break down an oligosaccharide that contains 10 glucose units?
mestny [16]
Answer is 10 units of water molecules.
3 0
3 years ago
What is the difference between “mass number” and “atomic mass”? which is found on the periodic table?
Greeley [361]

<span>Mass number is the number of protons and neutrons in an atom, and it tells us about the mass of the atom in amu, or atomic mass units. Atomic mass is the average mass of all the isotopes of a certain type.</span>

<span>Mass number found on the periodic table</span>

4 0
3 years ago
5. What is the mole fraction of NaOH in an aqueous<br> solution that contains 31.0 % NaOH by mass?
Liono4ka [1.6K]

Answer:

16.8%      

Explanation:

31% NaOH    molar mass  40 gm

69% H2O      molar mass  18  gm

1000 gm would be  

 310 gm NaOH  or  310/40 = 7.75 moles

 690 gm of H2O or  690/18 = 38.333 moles

7.75 / (7.75 + 38.333) = .168   mole fraction

6 0
2 years ago
How many grams of ice at -13 deg C must be added to 711 grams of water that is initially at a temperature of 87 deg C to produce
Basile [38]

Answer:

The answer to your question is m = 4.7 kg

Explanation:

Data

Ice                                   Water

mass = ?                          mass = 711 g

T₁ = -13°C                         T₁ = 87°C

T₂ = 10°C                         T₂ = 10°C

Ch = 2090 J/kg°K          Cw = 4180 J/kg°K

Process

1.- Convert temperature to kelvin

T₁ = 273 + (-13) = 260°K

T₁ water = 87 + 273 = 360 °K

T₂ = 10 + 273 = 283°K

2.- Write the equation of interchange of heat

                 - Heat lost = Heat absorbed

               - mwCw(T₂ - T₁) = miCi(T₂ - T₁)

-Substitution

              - 0.711(4180)(10 - 87) = m(2090)(10 - (-13))

- Simplification

                            228842.46 = 48070m

                            m = 228842.46/48070

-Result

                            m = 4.7 kg

4 0
3 years ago
____is not a resource that can be used to help meet our energy needs
Bezzdna [24]
I believe the answer to this is A. 
7 0
3 years ago
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