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sammy [17]
3 years ago
11

We do we mean when we say a substance is pure

Chemistry
1 answer:
tiny-mole [99]3 years ago
6 0

Answer:

ot means that contains only one kind of matter. 

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How do you find the-
earnstyle [38]
The atomic number is underlined in blue and the atomic mass is underlined in red. The number of protons and electrons is equal to the atomic number. The neutrons is equal to the atomic mass minus atomic number. The group is the vertical column the element is located in (circled in greenish), while the period is the horizontal row (circles in orange).

7 0
4 years ago
A scientist wants to determine how temperature affects photosynthesis? He sets up a controlled experiment in which he places sma
kolezko [41]

Answer:

Independent variable: DIFFERENT TEMPERATURE

Explanation:

The independent variable of an experiment is the variable that the experimenter changes or manipulates in order to effect an outcome or response in the measured variable/dependent variable.

In this experiment, a scientist wants to determine how temperature affects photosynthesis. He sets up the experiment by adding 20ml of water at different temperatures to three test tubes. Hence, the independent or experimental variable is the DIFFERENT TEMPERATURES GIVEN TO EACH PLANTS IN THE TEST TUBE because it is what the experimenter changes in order to effect a measurable outcome i.e. oxygen released in each balloon as a result of photosynthesis, which is the dependent variable

4 0
3 years ago
For a given reaction, ΔS = +106 J/mol ⋅ K, and the reaction is spontaneous at temperatures above the crossover temperature, 446
solniwko [45]

Answer:  47.276 kJ/mol

Explanation:

According to Gibb's equation:

\Delta G=\Delta H-T\Delta S

\Delta G = Gibbs free energy  

\Delta H = enthalpy change

\Delta S = entropy change  = +106 J/mol

T = temperature in Kelvin  = 446 K

\Delta G= +ve, reaction is non spontaneous

\Delta G= -ve, reaction is spontaneous

\Delta G= 0, reaction is in equilibrium

\Delta H=T\Delta S

\Delta H=T\Delta S

\Delta H=446K\times +106J/Kmol=47276J/mol=47.276kJ/mol   (1kJ=1000J)

Thus the value of ΔH = 47.276 kJ/mol, assuming that ΔH and ΔS do not vary with temperature.

7 0
3 years ago
Name some Changes in matter...
frutty [35]

Answer:

Solid, Liquid, Gas.

Explanation:

Quick gg search.

5 0
2 years ago
Read 2 more answers
How would poisoning proton pumps impact anion uptake? see section 36.3 ( page 755) ?
boyakko [2]
The answer to this question would be: the anion uptake will be decreased

If proton pump function is decreased, that means the amount of proton that goes outside the cell will be decreased. It will cause the anion uptake decreased too because some anion needs to go inside cells by co transporting with the proton.
7 0
4 years ago
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