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tatuchka [14]
3 years ago
5

What is speed ?

Chemistry
1 answer:
Slav-nsk [51]3 years ago
3 0
1. D
2. B (I think)

If you ever talk about speed, you say (per) usually so always look for that in a label. 
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Among these element groups, which is least likely to form ions?: 7A 3A 1A 4A
natta225 [31]

The  element  group  which  is least  likely  to form ions  is 4A  group


 <u><em>explanation</em></u>

Element   of   group  4A   has   4  valence  electrons.  for example Carbon which has   [He] 2S2 2P2  electron configuration has 4 valence electrons.

Since 4A elements has 4 valence electrons ,  it means  that  their valence shell  is half  filled which is  relatively stable. <em>For  this reason 4A element readily  form  ions.</em>

7 0
3 years ago
PLEASE PLEASE HELP<br> Calculate the mass of 3.4 moles of nitric acid (HNO3)
Elza [17]
Molar mass of nitric acid (HNO3) =atomic mass of hydrogen + atomic mass of nitrogen +3x atomic mass of oxygen . The molar mass of nitric acid (HNO3) is 63.0144 gram per mole, but you have 3.4 moles. Therefore; the answer is 63.0144 g/mole x 3.4 moles = 214.24896 grams.
6 0
3 years ago
Chemists and physicists often have to manipulate and control a variable that they want to study. Scientists who need to control
Inessa05 [86]
The answer is D I took the test
4 0
3 years ago
Read 2 more answers
Hi first one to answer ill give them brainliest <br> can you make a 3-D water cycle in a box?
Eva8 [605]

Answer: if ur talking abt a project,

yes, there will have to be a way to see how it looks like so it can't be a full box. so like the front or the top or anything has to be cut.

plus, if the water cycle itself would have to be printed to be a box shape

if not in a box shape, it can be inside a box. that would make it any shape but it's still in a box.

Explanation:

5 0
3 years ago
Read 2 more answers
3. Ethanol has a density of 0.800 g/mL. <br> a. What is the mass of 225 mL of ethanol?
dedylja [7]

Since the ethanol has a density of 0.800 g/mL, the mass of the ethanol is 180 grams.

<u>Given the following data:</u>

  • Volume of ethanol = 225 mL
  • Density of lead ball = 0.800 g/mL.

To find the mass of the ethanol;

Density can be defined as mass all over the volume of an object.

Mathematically, the density of a substance is given by the formula;

Density = \frac{Mass}{Volume}

Making mass the subject of formula, we have;

Mass = Density \times Volume

Substituting the given parameters into the formula, we have;

<em>Mass of ethanol </em><em>=</em><em> 180 grams.</em>

Read more: brainly.com/question/18320053

3 0
3 years ago
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