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Elena L [17]
3 years ago
10

What particles do during phase changes

Chemistry
1 answer:
andrey2020 [161]3 years ago
8 0

Explanation:

Hence in this experiment, the importance of experiment is being tested, as it is added only in one set of plant.

A manipulated variable is an independent variable whose amount can be changed during an experiment.

Here the fertilizer is a manipulated variable.

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If 1495 J of heat is needed to raise the temperature of a 319 g sample of a metal from 55.0°C to 66.0°C, what is the specific he
Olegator [25]
The specific  heat  capacity  of the  metal  is calculated  using  the  following  formula
Q(heat)= MC delta T
Q= 1495 j
c= specific heat   capacity =?
M(mass)=319 g
delta T = change  in  temperature = 66-55 =11 c
by  making   c  the subject  of the formula 

  C=Q /M delta T
c= 1495 j/ 319 g  x 11 c =0.426 j/g/c

3 0
3 years ago
In the actual co2 molecule the best description of the number of bonds between c-o atoms is
mel-nik [20]
The bonds between C and O are double bonds, because Carbon has to make 4 bonds in prefer to satisfy the octet rule and have 8 electrons in its outer shell. There are 2 double bonds

O=C=O
6 0
3 years ago
Elements in the same period have _____.
faust18 [17]

Ans: Elements in the same period have the same number of electron shells.

4 0
3 years ago
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What is the mass of a piece of iron if its density is 1.98 g/mL and its volume is 2.45 mL?
viktelen [127]

Answer:

4.858 g

Explanation:

Start with the formula

density = \frac{mass}{volume}

density = 1.98 g/mL

volume = 2.45 mL

mass = ??

rearrange the formula to solve for mass

(density) x (volume) = mass

Add in the substitutes and solve for mass

1.98 g/mL x 2.45 mL = 4.858 g

3 0
3 years ago
What is thought to be another cause of the large size of our brain compared to chimpanzees?
Anna35 [415]

Answer:

Compared to early humans our brains seemed to have increased in size, and part of the cause may be because of things like Climage change, ecology and social competition

Explanation:

6 0
3 years ago
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