Answer:
128.4 g
Explanation:
Step 1: Given data
- Mass percent of element X in X(NO₃)₂: 52.55%
- Mass of the element X in the sample: 67.50 g
Step 2: Determine the total mass of the sample
The mass percent of element X in X(NO₃)₂ is 52.55%, that is, there are 52.55 g of X every 100 g of X(NO₃)₂. Then, the mass of X(NO₃)₂ that contains 67.50 g of X is:
67.50 g X × 100 g X(NO₃)₂/52.55 g X = 128.4 g X(NO₃)₂
Molar mass C₆H₈O₆ = 176.12 g/mol
1 mole ------------------ 176.12 g
2.88x10⁻⁴ mole ------- ?
mass = 2.88x10⁻⁴ * 176.12 / 1
mass ≈ 0.05072 g
hope this helps!
An error in estimation could arise owing to;
1) Inaccurate measurement of the volumes of the solutions
2) When the reaction vessels are not properly cleaned
<h3>What is error in an experiment?</h3>
Error could occur in an experiment when values are misread. The error could be random error or a systematic error.
The major ways in which an error can occur in the estimation of concentration of acetic acid in the vinegar are;
1) Inaccurate measurement of the volumes of the solutions
2) When the reaction vessels are not properly cleaned
Learn more about errors in experiment:brainly.com/question/14149934
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The bowl of mixed fruits is a mixture because there are several things making up the object. Hence, option (B) is correct.
What is a mixture?
- The matter is categorized as mixtures and pure substances.
- A mixture is defined as a combination of substances that are not chemically mixed.
- A mixture can exist in solid, liquid, or gas form.
- A mixture can exist in the same or in a different phase. It can be homogenous or heterogeneous.
- If the substances are combined in the same phase, then the mixture is a homogeneous mixture.
- But if the substances are combined in different phases, then it is a heterogeneous mixture.
Therefore, the mixed fruit bowl is a mixture, because there are several things making up the object.
Hence, option (B) is correct.
To learn more about mixture, visit: brainly.com/question/12160179
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Answer:
E = hV
Explanation:
Hello,
Photo electric effect theory was borne out the the confusing if light was either a particle or a wave. However Albert Einstein came up with a theory that light was a particle and each particle carry a certain amount of energy referred to as photons.
He used Max Planck's idea and theorized that since light is made up of photon, when each photon comes in contact with the surface of a metal, the energy is transferred to the electron.
E = hv
E = energy of the photons
h = Planck's constant = 6.626×10⁻³⁴Js
v = frequency of the photon in Hz
