Answer:
3 × 10¯¹⁰
Explanation:
9×10² ÷ 3×10¹²
The above expression can be simplified as follow:
9×10² ÷ 3×10¹²
Recall:
9 = 3²
9×10² ÷ 3×10¹² = 3²×10² ÷ 3×10¹²
Recall:
a^m ÷ a^n = a^(m – n)
3²×10² ÷ 3×10¹² = 3^(2 – 1) × 10^(2 – 12)
= 3¹ × 10¯¹⁰
Recall:
a¹ = a
3¹ × 10¯¹⁰ = 3 × 10¯¹⁰
762 miles = 1226.32 kilometers
you multiply the miles by 1.609 to get the kilometers
Answer:
B. It showed that microorganisms bring about chemical changes
Explanation:
In 1857 Pasteur was working to solve a problem with the distillers of Lille in wich in their barrels the alcoholic fermentation become in a lactic fermentation, and of course, that was something that they didn't want. Throughout diferents studyes Pasteur discover that different microorganism where involved directly (where responsible) in different types of fermentation. That was the key to start the microbiology studies worldwide.
<span>Benedict's solution contains copper, which can accept electrons from reducing sugars and consequently change color. A positive Benedict's sugar test will produce an orange to brick-red color. Reducing sugars have either a free aldehyde functional group or a free ketone functional group as part of their molecular structure.</span>
Answer:
26%
Explanation:
Given data:
Mass of solute = 25.0 g
Volume of solution = 95.4 mL
Weight/volume % solution = ?
Solution:
The w/v% of any solution is calculated by dividing the mass of solute into total volume of solution multiply by 100.
Formula:
w/v% = weight of solute / volume of solution × 100
Now we will put the values in formula:
w/v% = 25.0 g / 95.4 mL × 100
w/v% = 0.26× 100
w/v% = 26%
