Help needed asap, I will mark the brainiest tomorrow after homework is graded (PLEASE NOT FUNNY BUSINESS)

How are the environments of a desert and a tundra different?

Alexeev081 [22]

Answer:

A tundra is less humid than a desert

Explanation:

6 0

2 years ago

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A powder sample weighing 250 g and having a surface area of 1 m2/g is dispersed in 1 L of water. After 10 minutes, 0.4 g of the

lisabon 2012 [21]

Answer:

a)

$K = 2.64 * 10^{-8}$

b)

$15 \frac{5}{8}$ hours

Explanation:

Given

Surface Area (S) of 250 grams of powder sample $= 250$ square meter.

$S = 2500000$ square centimeter

$V\frac{dC}{dT} = 0.40$ grams/minute

$V\frac{dC}{dT} = \frac{dM}{dT} = \frac{0.40*60}{10} = 0.66$ mg per second

$C_s = 0.01$ gram per cubic meter $= 10$ mg/ml

a)

$\frac{dM}{dT} = K SC_s$

$0.66 = K* 2500000* 10\\$

$K = 2.64 * 10^{-8}$ cm /sec

b) Time taken

Time taken to sink

$\frac{10*60}{0.4} * 37.5 = 56,250$

Time in hours

$15 \frac{5}{8}$ hours

6 0

3 years ago

What is meant by the term compound? Provide an example

PIT_PIT [208]

Answer:

I hope it helps

Explanation:

When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound. Compounds can be defined as substances consisting of 2 or more different types of elements in a fixed ratio of its atoms. When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties.Chemical Formula: Compounds are represented by their chemical formula. A chemical formula is a symbolic representation of the proportions of atoms that constitute a particular chemical compound.The chemical formula of water is H2O which shows two atoms of hydrogen and one atom of oxygen have combined to form one molecule of H2O. The chemical formula for common salt is NaCl which shows one atom of sodium and one atom of chlorine combine to form one molecule of NaCl.

6 0

3 years ago

4

Archy [21]

Answer:

Pressure

Explanation:

The variable that describes how often the particles in a sample of gas collides with each other and the walls of the container is the pressure.

The pressure of a gas is the combined force with which the gas molecules bombard a unit area of the wall of the container i.e the sum of all the tiny pushes on the unit area of the wall of the container.

The various units of gas pressure atmosphere, millimeters of Hg, torr, pascal, newton per meter squared.

Temperature is the degree of hotness or coldness of a body
Volume is the space the gases occupies.

3 0

3 years ago

Bam added 5.42 g of cscl to 35.31 ml of h2o. calculate the concentration of bam's solution in units of g solute/100 g solvent. m

Brums [2.3K]

Bam's solution, 5.42 g of CsCl mixed with 35.31 ml of H2O, has a concentration of 15.3882 g CsCl/100 g H2O.

Concentration, in chemistry, is defined as the amount of solute in a particular amount of solvent or solution. Some of the most common ways to express concentration includes molarity, mass-to-mass and mass-to-volume.

To solve for the concentration of Bam's solution in g solute/100 g solvent, solve for the mass of the solvent first.

To solve for the mass of the solvent, use the density and volume:

mass solvent = density x volume

mass solvent = 0.9975 g/ml x 35.31 ml

mass solvent = 35.221725 g

Solving for the concentration of Bam's solution in g solute/100 g solvent, where the mass of the solute CsCl is 5.42 g:

concentration = mass solute/ 100 g solvent

concentration = 5.42 g/ (35.221725/100)

concentration = 15.38822985

concentration = 15.3882 g CsCl/100 g H2O

To learn more about concentrations: brainly.com/question/23437000

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8 0

2 years ago

Help needed asap, I will mark the brainiest tomorrow after homework is graded (PLEASE NOT FUNNY BUSINESS)​

Help needed asap, I will mark the brainiest tomorrow after homework is graded (PLEASE NOT FUNNY BUSINESS)