Answer: ok pardon me but i think it's b
Explanation:
Answer:
Amylase enzymes help break down starches into sugars/maltose
Explanation: A
PH = -log[H₃O⁺]
[H₃O⁺] = 10^-pH
<span>[H₃O⁺] = 10^-2,32
</span>[H₃O⁺] =0,0047863 ≈<u> 4,79×10×10⁻³ mol/dm³</u>
<em>B) -- 4</em><span><em>,79×10⁻³ M</em></span>
Answer:
Mass = 46.52 g
Explanation:
Given data:
Mass of sodium phosphate react = 49.33 g
Mass of calcium phosphate produced = ?
Solution:
Chemical equation:
2Na₃PO₄ + 3Ca(NO₃)₂ → Ca₃(PO₄)₂ + 6NaNO₃
Number of moles of Na₃PO₄:
Number of moles = mass/molar mass
Number of moles = 49.33 g/ 163.94 g/mol
Number of moles = 0.300 mol
now we will compare the moles of Na₃PO₄ and Ca₃(PO₄)₂
Na₃PO₄ : Ca₃(PO₄)₂
2 : 1
0.300 : 1/2×0.300 = 0.15
Mass of Ca₃(PO₄)₂:
Mass = number of moles × molar mass
Mass = 0.15 mol × 310.14 g/mol
Mass = 46.52 g
Chemical change occur when two substances are combined and produces a new substance or decomposes into two or more substances which are entirely different from the original two substances.
There are three types of chemical changes. These are 1) Inorganic Changes, 2) Organic Changes, and 3) Biochemical Changes
Here are some examples of chemicsal changes.
If you combine Sodium and Water, chemical changes causes decomposition into Sodium Hydroxide and Hydrogen.
Sodium + Water ==> Sodium Hydroxide and Hydrogen
Na + H2O ====> NaOH and H
Another example of chemical change is:
Carbon Dioxide and Water will decompose into Sugar and Oxygen
Carbon Dioxide + Water ==> Sugar and Oxygen
CO2 + H2O ==> CnH2nOn (where n is between 3 and 7) and O
