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katrin2010 [14]
3 years ago
12

The table shows the mass in grams of one at of each of several elements. List the elements in order from least mass to greatest

mass per atom: hydrogen, carbon, oxygen, silver, gold.

Mathematics
1 answer:
kykrilka [37]3 years ago
8 0

Answer:

Option B

Step-by-step explanation:

The question can be solved without observing the masses and calculating them.

How?

  • Periodic table law states that masses get increased in group and get decreased in period.
  • Hydrogen is the 1st element so it has least mass.

Now

Only option B and D has Hydrogen at first.

  • Rest omitted

Now coming to last elements Carbon and Gold

Gold is heavier as per periodic table.

So option B is correct

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0/1<br> 2(x + 3) + 5y<br> when<br> x= 5 and y= 4
Lelechka [254]

Answer:

36 is the answer here

Step-by-step explanation:

Well when you subsitute the given values

x=5

and

y=4

2(5+3)+5*4

Now solve it normally like what you would do with orders of operation

10+6+20

Left to right

36

6 0
2 years ago
3x2 +4=0 whats the answer?
Rufina [12.5K]

Answer:

False

Step-by-step explanation:

3x2 is 6 and 6 +4 is not 0 it is ten 10 norder of operations

3 0
3 years ago
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Which of the following is the best estimate of the direction of the given vector?
notka56 [123]

Answer:

The direction of the given vector is 45° N of W

Step-by-step explanation:

* Lets revise the four directions with the four quadrants

- The four directions are:

# North which represented by the positive part of y-axis

# South which represented by the negative part of y-axis

# East which represented by the positive part of x-axis

# West which represented by the negative part of y-axis

∴ The first quadrant is between the East and the North

∴ The second quadrant is between the West and the North

∴ The third quadrant is between the West and the South

∴ The fourth quadrant is between the East and the South

* The direction of any vector is tan Ф, where Ф is the angle between

 the vector and the x-axis, then:

- The direction of North of East is 45° ⇒ first quadrant

- The direction of North of West is 45° ⇒ second quadrant

- The direction of South of West is 45° ⇒ third quadrant

- The direction of South of East is 45° ⇒ fourth quadrant

* Now lets solve the problem

∵ The direction of the vector is between the North and the West

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∴ Its direction is 45° North of West

* The direction of the given vector is 45° N of W

7 0
2 years ago
Let f(x) = x2- 3x - 7. Find f(-3)
Alexxx [7]
F(x) = x^2 - 3x - 7
f(-3) = (-3)^ 2 - 3(-3) - 7
f(-3) = 9 + 9 - 7
f(-3) = 18 - 7
f(-3) = 11
6 0
3 years ago
One equation in a system is y=3x+7. Which equation gives the system no solution
atroni [7]

Answer:

A

Step-by-step explanation:

Because I know how to do it

7 0
2 years ago
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