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3 years ago

1. Which kingdom is made up of only autotrophs?

Chemistry

1 answer:

Reika [66]3 years ago

3 0

Answer: I believe it's C

Hope this helped<3

Can you please make my answer brainly

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Why does water flow decrease in your shower when someone flushes the toilet

Rashid [163]

Answer:

A toilet requires a large amount of cold water to flush. So, when the toilet flushes while you're in the shower, it's stealing from your shower's cold water supply. When the pressure-balancing valve senses the drop in cold water pressure, it responds by restricting the hot water pressure.

6 0

3 years ago

Read 2 more answers

An experiment has been set up to determine if different types of insulation wrap will affect the temperature of water in a conta

kozerog [31]

Insulation wraps because independent is the variable you are changing to affect the dependent variable (what you are measuring)

3 0

3 years ago

Which choice describes a population? A. all the gray squirrels that live in a forest B. a nonliving factor in an organism's envi

goldenfox [79]

I believe D. because all the organisms that live in a lake can be a bunch of living things that would be considered a population and not a species. I canceled out B. from the get go because, I don’t believe non living organisms can be in a population ?

Please get back to me if I’m right or wrong :)

5 0

3 years ago

A balloon filled with helium occupies 20.0 l at 1.50 atm and 25.0◦c. How many moles of helium will there be in the balloon at st

satela [25.4K]

Answer:

There will be 1.23 moles of helium in the balloon at STP

Explanation:

1) <u>Initial conditions of the helium gas</u>:

V = 20.0 liter
p = 1.50 atm
T = 25.0 °C = 25.0 + 273.15 K = 298.15 K

2) <u>Ideal gas equation</u>:

pV = n RT
p, V, and T are given above
R is the Universal constant = 0.0821 atm-liter / ( K - mol)
n is the unknown number of moles

3) <u>Solve for n</u>:

n = pV / (RT) =

n = 1.50 atm × 20.0 liter / (0.0821 atm-liter /k -mol ×298.15K)

n = 1.23 mol

4) <u>At STP:</u>

STP stands for standard pressure and temperature.

The amount (number of moles) of the gas will not change because the change of pressure and temperature, so the number of moles reamain the same: 1.23 mol.

8 0

2 years ago

Determine the empirical formula of a compound containing 40. 6 grams of carbon, 5. 1 grams of hydrogen, and 54. 2 grams of oxyge

zavuch27 [327]

The empirical formula is C₂H₃O₂

<h3>What is Empirical formula of a compound ?</h3>

The empirical formula is the simplest whole number ratio of elements present in a compound.

The total molar mass of the compound is 118.084 g/mol.

mass of Carbon present = 40.6

mass of Hydrogen present = 5.1 grams

mass of Oxygen present = 2 grams

Moles of C = 40.6/12 = 3.38

Moles of H = 5.1/1.008 = 5

Moles of Oxygen = 54.2/15.999 = 3.38

Ratio of Moles of C to Oxygen is 1 : 1

Ratio of Moles of C to H is 1/1.5

Multiplying each mole fraction by 2

The empirical formula is C₂H₃O₂

To know more about Empirical Formula

brainly.com/question/14044066

#SPJ1

5 0

2 years ago