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Gala2k [10]
3 years ago
7

Stephen pours a glass of ice water. He gets a phone call before he can drink it. What will happen if he leaves the glass on the

counter for 2 hours?
a heat will transfer from the water to the ice until both reach the same temperature
b heat will transfer from the water to the ice until the water is colder than the ice
c heat will transfer from the ice to the water and the ice will stay colder than the
water.
d heat will transfer from the ice to the water and the ice will get warmer than water
Chemistry
1 answer:
valina [46]3 years ago
3 0

Answer:

d im pretty sure

Explanation:

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Two compounds are tested for mass composition. Compound X contains 15.0 grams hydrogen and 120.0 grams oxygen. Compound Y contai
4vir4ik [10]
In order to determine if compounds X and Y are the same, the mole percentages of the elements present should be equal in both compounds.

For compound X

number of moles H = 15/ 1 =15 mol H
number of moles O = 120/ 16 = 7.5 mol O

total moles = 22.5 mol

mole percentages
% mole H = 67%
% mole O = 33%

For compound Y 

mole of H = 2 /1 = 2
mole of O = 32/16 = 2

total mole = 4 mole

mol %

% mol H = 50%
% mol O = 50%

there the two compounds are not the same.
3 0
3 years ago
Which sample contains the fewest atoms? a. 10 g of c b. 10 g of ne c. 10 g of f d. 10 g of n e. 10 g of o
Lerok [7]

The molar mass and the mass of the substance give the moles of the substance. The 10-gram sample of neon (Ne) has the fewest atoms. Thus, option b is correct.

<h3>What are moles?</h3>

Moles of the substance are the ratio of the molar mass and the mass of the substance. The moles of each atom with respect to the Avagadro's number (Nₐ) is given as,

Moles = mass ÷ molar mass

  • Moles of carbon (C) = 10 ÷ 12

= 0.83 Nₐ atoms

  • Moles of neon (Ne) = 10 ÷ 20

= 0.5 Nₐ atoms

  • Moles of fluorine (F) = 10 ÷ 19

= 0.52 Nₐ atoms

  • Moles of nitrogen (N) = 10 ÷ 14

= 0.7 Nₐ atoms

  • Moles of oxygen (O) = 10 ÷ 16

= 0.63 Nₐ atoms

Therefore, option b. 10 gm neon has the fewest atoms.

Learn more about moles here:

brainly.com/question/11884840

#SPJ1

7 0
2 years ago
Why is nature more influential than nurture?
Sphinxa [80]

Answer:

Nature involves the charecterists  we inherit through our genes, hence why we often hear the phrases “You’re just like you’re mother/father” from friends or other family members. Whereas, nurture includes the influence of the environment or our surroundings within childhood, on our later personalities and behaviour.

6 0
3 years ago
Read 2 more answers
An aqueous solution of sodium hydroxide is standardized by titration with a 0.170 M solution of perchloric acid. If 28.5 mL of b
Ray Of Light [21]

Answer:

0.095M

Explanation:

HClO4 + NaOH = NaClO4 + H2O

Concentration of acid CA= 0.170M

Concentration of base CB= ???

Volume of base VB= 28.5ml

Volume of acid VA= 16.0ml

Number of moles of acid nA= 1

Number of moles of base nB= 1

From

CAVA/CBVB= nA/nB

CB= CAVAnB/VBnA

CB= 0.170×16.0×1/28.5×1

CB= 0.095M

4 0
3 years ago
I NEED HELP PLEASE, THANKS!! :)
In-s [12.5K]

Answer:

B) microscopic

Explanation:

A scanning tunneling microscope allows imaging of microscopic particles.

5 0
3 years ago
Read 2 more answers
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