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2 years ago

WILL GIVE BRAINLIEST

1 answer:

3 0

Weathering breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice. There are two types of weathering: mechanical and chemical. Mechanical weathering is the disintegration of rock into smaller and smaller fragments.

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The steps in an investigation between two negatively charged objects are listed below.

dezoksy [38]

Answer:

Explanation:

step 2

3 0

2 years ago

Read 2 more answers

The volume of a Goodyear Blimp is 2.5x10^7 L, which is occupied by 1.7x10^6 mol of helium. What is the internal pressure of the

attashe74 [19]

Answer:

1.7 bar

Explanation:

We can use the Ideal Gas Law to calculate the individual gas pressure.

pV = nRT Divide both sides by V

p = (nRT)/V

Data: n = 1.7 × 10⁶ mol

R = 0.083 14 bar·L·K⁻¹mol⁻¹

T = 22 °C

V = 2.5 × 10⁷ L

Calculations:

(a) Change the temperature to kelvins

T = (22 + 273.15) K

= 295.15 K

(b) Calculate the pressure

p = (1.7 × 10⁶ × 0.083 14 × 295.15)/(2.5× 10⁷)

= 1.7 bar

4 0

3 years ago

A coffee-cup calorimeter initially contains 125 g water at 24.28C. Potassium bromide (10.5 g), also at 24.28C, is added to the w

iren2701 [21]

Answer:

The solution is given below

Explanation:

Heat, q= mc∆T

q= 125g x 4.18 J/g∙°C x (21.18x- 24.28) °C

q= -1619.75J

NEGATIVE SIGN INDICATES THAT HEAT IS ABSORBED.

Enthalpy Change, ∆H = 1619.75 7/ 10.5 g

= 154.26 J/g

No. of moles of KBr = Mass of KBr/ Molecular Weight of KBr

=10.5g/119gmol-1

=0.088 mol

∆H= 1619.75 J/ 0.088 mol

= 18.41 kJ/mol

6 0

3 years ago

You have 7.86 x 10^23 molecules of NaCl. This would be equal to ___ grams of NaCl.

sergij07 [2.7K]

$7.86 \times 10 {}^{23} atoms \\ \frac{7.86}{6.022} \times \frac{10 {}^{23} }{ {10}^{23} } = 1.305\: moles$

1.305 × (23+35.5) = 76.34 grams

3 0

2 years ago

An emission of green visible light from the Cu2+ ion. The literature reports emission of blue visible light from the Cu+ ion. Ch

lord [1]

B. Increasing the effective nuclear charge on an ion results in energy levels that are closer together.
hope it helps

3 0

3 years ago

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WILL GIVE BRAINLIEST