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2 years ago

Directions: Fill in the blanks with the correct terms to complete the statements. Write your answer on your answer

Chemistry

1 answer:

Doss [256]2 years ago

8 0

Answer:

1. Mountain ranges

3.pacific ocean ??

4.tempature

I'm not really sure on 2 bit trying to help you :)

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How many moles are in 45.8 g of calcium nitrate, Ca(NO3)2? PLEASE HELP

VLD [36.1K]

Answer:

the number of moles is 0.279

Explanation:

The computation of the number of moles of calcium nitrate, is shown below;

We know that

Number of moles = mass of substance ÷ molecular weight

= 45.8 g ÷ 164.088

= 0.279moles

hence, the number of moles is 0.279

We simply applied the above formula so that the correct value could come

6 0

2 years ago

How strong is the attractive force between a glass rod with a 0.680 µC charge and a silk cloth with a −0.590 µC charge, which ar

d1i1m1o1n [39]

Answer:

$\left |F\right | =0.298\ N$

Explanation:

Data provided:

Charge on the glass rod, Q = 0.680 μC = 0.680 × 10⁻⁶ C

Charge on the silk cloth, q = 0.590 μC = - 0.590 × 10⁻⁶ C

Distance between glass rod and the silk cloth, r = 11.0 cm = 0.11 m

now,

The force between (F) the charges is given as:

$\left |F\right |=\frac{kQq}{r^2}$

where,

k is the Coulomb's constant = 9 × 10⁹ N.m²/C²

on substituting the respective values, we get

$\left |F\right | =\left |\frac{9\times10^9\times0.680\times10^{-6}\times(-0.590\times10^{-6})}{0.11^2}\right |$

$\left |F\right | =0.298\ N$

3 0

3 years ago

What happens to the kinetic energy of the particles in a sample of gas as

pychu [463]

Answer:

See below

Explanation:

Temperature is basically a measure of the average kinetic energy of the particles in the sample ....so as temp goes up, kinetic energy increases

3 0

2 years ago

Read 2 more answers

What is the molar Mass of 2.4g of oxygen

liq [111]

<span>2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was found to be 60. a)What are the masses of carbon, hydrogen and oxygen in 2.4g of the compound? b)What are the emperical and ..</span>

4 0

3 years ago

A particle of mass 2.0 kg moves under the influence of the force F(x)=(-5x^2+7x)~\text{N}F(x)=(−5x 2 +7x) N. If its speed at

Brums [2.3K]

Answer:

The speed of the particle at x = 4.0 m is 13.66 m/s

Explanation:

The work done by this force between the two points above is given by

W = ∫ F dx

W = ∫⁴₋₄ (-5x² + 7x) dx

W = [(-5x³/3) + (7x²/2)]⁴₋₄

W = [(-5(4³)/3) + (7(4²)/2)] - [(-5(-4)³)/3) + (7((-4)²)/2)] = (-50.6667) - (162.6667) = (- 213.33 J)

Kinetic energy at -4.0 m

At this point, v = 20 m/s

K.E = mv²/2 = 2 × 20²/2 = 400 J

To obtain the kinetic energy at 4 m,

We apply the work-energy theorem which mathematically translates to

The work done in moving a particle from one point to another = Change in kinetic energy of the particle between those two points

W = ΔK.E

Work done between x = - 4m and x = 4 m is - 213.33 J

Hence, ΔK.E = -213.33 J

Change in kinetic energy of the particle between x = - 4m and x = 4m is ΔK.E

ΔK.E = (Kinetic energy at x = 4m) - (kinetic energy at x = - 4m)

- 213.33 J = (mv²/2) - 400

mv²/2 = -213.33 + 400 = 186.67 J

2v² = 2 × 186.67

v² = 186.67

v = 13.66 m/s.

5 0

3 years ago