3 years ago

Which of the following contribute(s) to most of the mass of an atom?

Chemistry

1 answer:

xenn [34]3 years ago

6 0

Answer:

B) protons and newtrons

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A car traveled 1500 km from Dallas to Shreveport in 4 hours. What is its average speed?

Gennadij [26K]

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$\frac{1500 \: km}{4 \: hours} = 375 \: km \: per \: hour.$

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2 years ago

4. How many atoms are in 32.6 g of Oxygen?

Natali5045456 [20]

Hey there!

Oxygen has a molar mass of 16. That means 16g of oxygen is 1 mole.

32.6 ÷ 16 = 2.0375 moles

We have 2.0375 moles.

There are 6.022 x 10²³ atoms in one mole.

2.0375 x 6.022 x 10²³

1.3 x 10²⁴

There are 1.3 x 10²⁴ atoms in 32.6 grams of oxygen.

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3 years ago

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A serving of Frosted Flakes cereal contains 235,000 J of energy. Calculate the change in temperature (ΔT) that would occur if th

timama [110]

The change in temperature (ΔT) : 56.14 ° C

<h3>Further explanation</h3>

Given

Cereal energy = 235,000 J

mass of water = 1000 g

Required

the change in temperature (ΔT)

Solution

Heat can be formulated :

Q = m . c . ΔT

c = specific heat for water = 4.186 J / gram ° C

235000 = 1000 . 4.186 . ΔT

$\tt \Delta T=\dfrac{235000}{1000\times 4.186}=56.14^oC$

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A student makes a cross-section clay model to represent the internal structure of a volcano that leads to the formation of two r

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CAnswer:

Explanation:

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2 years ago

What is pH a measure of?

s344n2d4d5 [400]

It measures the acidity/basic level, that rules A out
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