2 years ago

HELP PLEASE I dont understand this (7th Grade science)

Chemistry

2 answers:

Aleonysh [2.5K]2 years ago

8 0

The first is chemical

Maksim231197 [3]2 years ago

7 0

For the second one it is physical

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The Top Thrill Dragster, a rollercoaster at Cedar Point in Ohio, soars through the air at 176ft/sec. How fast is this in mph?

scoray [572]

Answer:

120mph

Explanation:

Google

divide the speed value by 1.467

176 times 60 second in a minute times 60 minutes in an hour

than divide by 5280 the amount of feet in a mile

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2 years ago

How is a covalent bond different from an ionic bond?

Alex17521 [72]

A covalent bond is a form of chemical bonding between two non-metals, whereas ionic bonding is a bond between a metal and a non-metal.

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2 years ago

100.mL of a .795 M solution of KBr is diluted to 500.mL. what is the new concentration of the solution?

kap26 [50]

Answer:

0.159 M

Explanation:

convert from mL to L then use the equation:

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rearrange to find M2

$\frac{M1V1}{V2} = M2$

$\frac{(0.795 M)(0.100 L)}{0.500 L} = 0.159 M$

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2 years ago

An empty beaker is weighed and found to weigh 23.1 g. Some potassium chloride is then added to the beaker and weighed again. The

GuDViN [60]

Answer:Mass of Potassium chloride =1.762g

Explanation:

Mass of empty beaker = 23.100 g

Mass of beaker with Potassium chloride = 24.862g

Mass of Potassium chloride = Final weight - initial weight = Mass of beaker with Potassium chloride - Mass of empty beaker = 24.862-23.100 = 1.762g

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3 years ago

Please help with number 24

vladimir1956 [14]

Layla it is A. that's the only one in standard form.

3 0

3 years ago

Read 2 more answers