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e-lub [12.9K]
3 years ago
8

1. How will you differentiate physical from chemical change in terms of the

Chemistry
1 answer:
Tpy6a [65]3 years ago
3 0

Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

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C. The element in group 2 and period 3 is -
Tatiana [17]

Answer:

Magnesium

Explanation:

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3 years ago
What do all steroids have in common?
Morgarella [4.7K]
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Help please with this question <br> Picture above
dybincka [34]
A,D,and E I hope this helps
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3 years ago
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What amount of heat energy is required to raise the temperature of 152 g of water from 24 °C to 74 °C.
DIA [1.3K]

Answer:

Q = 31798.4J = 31.79kJ

Explanation:

Heat energy (Q) = ?

Mass (m) = 152g

T1 = 24°C

T2 = 74°C

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Q = Mc∇T

Q = 152 * 4.184 * (74 - 24)

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Heat required is 31.79kJ

6 0
3 years ago
Round to 4 significant figures.<br> 0.00238866
Nikitich [7]

Answer:

0.002389

Explanation:

look at the first non-zero digit if rounding to one significant figure

look at the digit after the first non-zero digit if rounding to two significant figures

draw a vertical line after the place value digit that is required

look at the next digit

if it's 5 or more, increase the previous digit by one

if it's 4 or less, keep the previous digit the same

fill any spaces to the right of the line with zeros, stopping at the decimal point if there is one

6 0
3 years ago
Read 2 more answers
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