1. What is the empirical formula for a compound containing 63.8% N and 36.2% O?a. N₂O₅
b. N₂O₃
c. NO₂
d. NO
e. N2₂O
Answers
43,89g≈44g
44g == 2x 14g (N) + 1x 16x(O)
M N₂O = 44g
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Instructions on balancing chemical equations:
Enter an equation of a chemical reaction and click 'Balance'. The answer will appear below
Always use the upper case for the first character in the element name and the lower case for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Compare: Co - cobalt and CO - carbon monoxide
To enter an electron into a chemical equation use {-} or e
To enter an ion specify charge after the compound in curly brackets: {+3} or {3+} or {3}.
Example: Fe{3+} + I{-} = Fe{2+} + I2
Substitute immutable groups in chemical compounds to avoid ambiguity.
For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced,
but PhC2H5 + O2 = PhOH + CO2 + H2O will
Compound states [like (s) (aq) or (g)] are not required.
If you do not know what products are enter reagents only and click 'Balance'. In many cases a complete equation will be suggested.
Reaction stoichiometry could be computed for a balanced equation. Enter either the number of moles or weight for one of the compounds to compute the rest.
Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reagents
Answers
a revolving structure in an electric motor or generator, wound with the coils that carry the current.
Answer:
The correct option is: D. A small lever in a relay switch
Explanation:
Armature is a constituting part of an electric machine, that can be used as a stationary or rotating part. It is a conductor or a conducting coil that carries alternating current and can generate electromotive force.
In a solenoid, the movable steel or iron part that functions as a switch or relay is also termed as the armature.
Answers
When rocks break down because of chemical reactions it is called chemical weathering. The rocks are weakened and subsequent disintegration of rock by chemical reactions. They can be oxidation, hydrolysis and carbonation.
Answers
g/eq = molar mass / number of H⁺
g/eq = 98 / 2
= 49 g/eq
Volume in liters = 500 mL / 1000 => 0.5 L
N = 20 / 0.5 x 49
N = 20 / 24.5
= 0.816 N
hope this helps!
Answers
Answer:
Molar concentration of HCl in this Solution = 0.01 molar
Explanation:
Given pH = 1.37
So Concentration of H⁺ is equal to = 0.042 molar
Volume of HCl solution = 250 ml
Since,
1000 ml solution contain 0.042 mole of HCl
250 ml solution contain = = 0.01 molar
Round off value = 0.01
Molar concentration of HCl in this Solution = 0.01 molar
Answers
Answer:
The correct answer will be- by providing different amount of water to experimental groups.
Explanation:
The scientific experimental samples are divided into two groups: the control group in which the variable to be studied is kept constant and the experimental variable to which different amount of studied variable is provided.
In the given question, the scientific question is how much amount of water is required for the optimal growth of the plants. The variable to be studied is water, so different amount of water is provided to different pots like 10 ml, 20 ml, 30 ml and so on. So the plant which will respond best to this amount will be the optimal concentration of the water required by the plant to grow.