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4 years ago

Use the periodic table to match each of the following element symbols to its name, atomic mass, or atomic number.

Chemistry

1 answer:

VMariaS [17]4 years ago

3 0

Sb is the atomic symbol of antimony

S is the atomic symbol of sulfur

Si is the atomic symbol of silicon

The atomic number of Sb is 51

The atomic number of S is 16

The atomic number of Si is 14

The atomic mass of Sb is 121.76

The atomic mass of S is 32.06

The atomic mass of Si is 28.08

Thus the correct match will be

Sb --------------------B (antimony)

S------------------------A(32.06) (atomic mass)

Si------------------------C(14) (atomic number)

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7. The tendency of sound waves to bend when they pass from one medium to a different medium is known as A. refraction C. resonan

ahrayia [7]

The tendency of sound waves to bend when they pass from one medium to a different medium is known a refraction.

<h3>What is refraction ?</h3>

In diffraction, a sound wave is bent or stretched out in a single medium where the sound speed remains constant. Refraction is a crucial instance in which sound waves arc or diffuse. Due to variations in the wave's speed, a sound wave bends in this occurrence.

A wave bends as it travels along the edge of an object or through an aperture. It is referred to as diffraction. When a wave transitions from one medium to another at an angle, it also bends. It's known as refraction.

Thus, The option A is correct.

To learn more about refraction follow the link below;

brainly.com/question/2660868

#SPJ1

7 0

1 year ago

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of eth

Hoochie [10]

Answer : The number of drops it takes from a dropper to dispense 1.0 ml of ethanol is, 20 drops

Solution : Given,

Density of ethanol = 0.80 g/ml

Mass of ethanol = 0.60 g

First we have to calculate the volume of ethanol.

Formula used : $Density=\frac{Mass}{Volume}$

$0.80g/ml=\frac{0.60g}{Volume}$

$Volume=\frac{0.60g}{0.80g/ml}=0.75ml$

The volume of ethanol is, 0.75 ml

Now we have to calculate the number of drops it takes from a dropper to dispense 1 ml of ethanol.

As, the number of drops in 0.75 ml of ethanol = 15

So, the number of drops in 1.0 ml of ethanol = $\frac{15}{0.75}\times 1.0=20$

Therefore, the number of drops it takes from a dropper to dispense 1.0 ml of ethanol is, 20 drops

8 0

3 years ago

A beaker containing a mixture of N2(g) and H2(g) is cooled by placing it in a tray of cold water. In response to the cooling, th

Nataliya [291]

The frequency of collisions between the N₂ and H₂ molecules will decrease and the rate of reaction will also decrease.

Since the water is cooler than the gas mixture, heat will flow from the gas to the water.

The gas will cool down, so the average kinetic energy of the gas molecules will decrease.

The molecules will be moving more slowly, so there will be <em>fewer collisions</em> and <em>fewer of these collisions will have enough energy to react</em>.

The rate of reaction between H₂ and N₂ molecules at room temperature is exceedingly slow, <em>but cooling the gas mixture will make the reaction even slower</em>.

3 0

4 years ago

Read 2 more answers

Ice melts into water. The correct equation to calculate the heat of this reaction is...

mr_godi [17]

Answer:

q=mAHf

Explanation:

When water change form from solid(ice) to liquid, it will need heat that depends on the heat of fusion(Hfus). If the form changed from liquid to gas it will use the heat of vaporization(Hvap) instead. The heat of fusion usually written just AT

q=MCAT is used to calculate heat when temperature change(AT = delta T= difference in temperature)

q=mAHvap is wrong because you need if the form change from liquid to gas

q=mc^2 is wrong because it describes the relation of mass and energy, not the form.

The answer should be q=mAHf

6 0

3 years ago

Twenty-four grams of magnesium metal reacts with sixteen grams of oxygen gas to form magnesium oxide. According to the law of co

DedPeter [7]

The law of conservation of mass dictates that the total mass of reactants must be equal to the total mass of the products. Thus:
mass(MgO) = mass(Mg) + mass(O)
mass(MgO) = 24 + 16
mass(MgO) = 40 g

The third option is correct.

4 0

3 years ago

Read 2 more answers