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lesya [120]
2 years ago
5

This is for people who have siblings.

Chemistry
1 answer:
LekaFEV [45]2 years ago
5 0

Answer:

mannn i told that little brat to stop taking the goldfish outta the box because i want them so he better hope he dies cuz if he dosent imma shove these goldfish down his throat ~respectfully~

Explanation:

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A ninja motorbike travelling at 55 m/s takes 10 sec to come to rest . What is its deceleration rate ?
9966 [12]

Answer:

Speed=Distance

Time

Explanation:

5 0
2 years ago
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The combining of hydrogen and oxygen gas into liquid water is an example of what kind of change?
KatRina [158]
The combining of hydrogen and oxygen gas into liquid=H2O (water) is a compound or a molecule because it is 2 different elements combined with chemical bonds so its Chemical. B 
7 0
3 years ago
What is the mass of 7.675 x 1023 atoms C? Answer in units of g.
nalin [4]

Answer: 15.3 grams C

Explanation:  1 mole is 6.02x10^23 atoms.  We can find the moles of C in 7.675 x 10^23 atoms of C by dividing:

(7.675 x 10^23 atoms C)/(6.02x10^23 atoms C/mole) = 1.275 moles C

The molar mass of carbon is 12g/mole.  So the mass of 7.675 x 10^23 atoms is (1.275 moles C)*(12 g/mole C) = 15.3 grams.

3 0
2 years ago
Determine the heat energy needed to raise the temperature of 120 grams of ice at -5 to steam at 115°
CaHeK987 [17]

Answer:

Q = 30355.2 J

Explanation:

Given data:

Mass of ice = 120 g

Initial temperature = -5°C

Final temperature = 115°C

Energy required = ?

Solution:

Specific heat capacity of ice is = 2.108 j/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Q = m.c. ΔT

ΔT = T2 -T1

ΔT = 115 - (-5°C)

ΔT = 120 °C

Q = 120 g × 2.108 j/g.°C × 120 °C

Q = 30355.2 J

5 0
3 years ago
Oxygen has 8 plus-charged protons. The number of minus-charged electrons is
DiKsa [7]

A single oxygen has atomic number 8 that means the nuclei of all oxygen atoms have eight protons. The number of minus-charged electron is two but the number of electrons is 10. <span>To gain a minus two-charge ion, it must have two more negative electrons than positive charged protons. With this, the ion has 10 electrons, which give it a -2 net charge. </span>

6 0
3 years ago
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