1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sleet_krkn [62]
3 years ago
12

What is thought to be another cause of the large size of our brain compared to chimpanzees?

Chemistry
2 answers:
Anna35 [415]3 years ago
6 0

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:

allsm [11]3 years ago
4 0
2 in the bone it lab own
You might be interested in
How many Neutrons are in a ^15N isotope?
Goshia [24]
There are 150 neutrons in 15N
5 0
3 years ago
write a balanced chemical equation for solid copper reacting with aqueous silver nitrate to produce aqueous copper (II) nitrate
sashaice [31]
Make sure have same amounts of species on both sides
Cu (s) + 2 AgNO3 (aq) -> Cu(NO3)2 (aq) + 2 Ag (s)
7 0
3 years ago
You have 4 moles of oxygen gas in a flask. 4 moles of helium gas is added. What happens to the total pressure of the gases in th
ASHA 777 [7]

Answer: The correct option is (c). The total pressure doubles.

Solution:

Initially,  only 4 moles of oxygen gas were present in the flask.

p_{O_2}=Tp_1\times X_{O_2}  (X_{O_2}=\frac{4}{4}) ( according to Dalton's law of partial pressure)

p_{O_2}=Tp_1\times 1=Tp_1....(1)

Tp_1= Total pressure when only oxygen gas was present.

Final total pressure when 4 moles of helium gas were added:

X'_{O_2}=\frac{4}{8}=\farc{1}{2},X_{He}=\frac{4}{8}=\frac{1}{2}

partial pressure of oxygen in the mixture :

Since, the number of moles of oxygen remains the same, the partial pressure of oxygen will also remain the same in the mixture.

p_{O_2}=Tp_2\times X'_{O_2}=Tp_2\times \frac{1}{2}

Tp_2= Total pressure of the mixture.

from (1)

Tp_1=Tp_2\times X'_{O_2}=Tp_2\times \frac{1}{2}

On rearranging, we get:

Tp_2=2\times Tp_1

The new total pressure will be twice of initial total pressure.

7 0
3 years ago
One mole of ice at 0°C is added to two moles of water at 50°C under a constant external pressure of 1 atm. This process is carri
kotykmax [81]

Answer:

T2 = 29.79°C

Explanation:

Equliibrium signifies that heat loss = heat gained

Heat gained by Ice;

H = ML

Mass, M = Number of moles * Molar mass = 1 * 18 = 18g

l = 6.01 k J m o l = 334 J/g

C = 4.186 J/g

H =  18(334)

H = 6012

Heat lost by water

H = MCΔT

H = 18 * 4.186 * (50 - T2)

H = 3767.4 - 75.348T2

Since H = H, we have;

6012 = 3767.4 - 75.348T2

- 75.348T2 = 3767 - 6012

T2 = 2245 / 75.348

T2 = 29.79°C

8 0
3 years ago
Which describes why liquid moves through a straw?
vodomira [7]

Answer:

C.

The air pressure creates a vacuum in the straw that pulls the air into the liquid.

4 0
3 years ago
Other questions:
  • Which of the following solutions is a good buffer system? Which of the following solutions is a good buffer system? a solution t
    6·1 answer
  • What is the basic unit of all matter?What is the basic unit of all matter?
    13·2 answers
  • A 50.0-g sample of liquid water at 25.0 °c is mixed with 35.0 g of water at 51.0 °c. The final temperature of the water is _____
    5·2 answers
  • compare (a) the numer of atoms and (b) the number of grams present in 1.00 mole of helium and 1.00 mole of argon
    7·1 answer
  • Select the correct answer.
    8·2 answers
  • think about the lab procedure you just read. Label each factor below V for variable or C for constant.
    7·2 answers
  • What is the density of a substance with a mass of 15.0 g and a volume of 5.0 mL?
    14·1 answer
  • A reaction in which an acid reacts with an alkali to produce a salt and water only is known as
    7·2 answers
  • I need help with this
    14·1 answer
  • Which of these data points is the most reliable?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!