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poizon [28]
3 years ago
13

When a scientist uses reasoning to explain or interpret the things they observe

Chemistry
1 answer:
Kipish [7]3 years ago
7 0

Answer:

Inferring is when a scientist uses reasoning to explain or interpret the things they observe

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What is the bond angle in a tetrahedral molecule?
levacccp [35]
109.5

tetrahedral shape:
number of electron pair = 4,
number of bonded pair = 4,
number of lone pair = 0.
7 0
3 years ago
Read 2 more answers
at a given tempature gas with a pressure of 150 kpa has volume of 0.8 l if the pressure decreases to 75kpa and the temperature r
vova2212 [387]
  <span>P*V/T=constant 
so P*V= constant*T 
if T doesn't change then 
P*V= constant 
so 150kPa*0.8L=75kPa*xL 
xL=150kPa*0.8L/75kPa=1.6L 
hope it help</span>
8 0
3 years ago
A 20 g granite boulder absorbs 300.2 Joules of energy from the Sun, resulting in its temperature
s344n2d4d5 [400]

Answer:

19 °C

Explanation:

Step 1: Given and required data

  • Mass of granite (m): 20 g
  • Heat absorbed (Q): 300. 2 J
  • Specific heat capacity of granite (c): 0.790 J/g.°C

Step 2: Calculate the temperature change (ΔT)

We will use the following expression.

Q = c × m × ΔT

ΔT = Q/c × m

ΔT = 300.2 J/(0.790 J/g.°C) × 20 g = 19 °C

3 0
3 years ago
Questions and answers about isotopes grade 8 I need this for a PowerPoint exam projects
DanielleElmas [232]

Answer:

Question: A patient is diagnosed with a damage in the thyroid gland.

Which isotope is used to treat the patient?

Option:

A. Copper-64

B. Cobalt-60

C. Carbon-14

D. Iodine-131

Correct answer : D. Iodine-131

Question: Give the definition of isotopes.

Answer : Isotopes is the atoms of elements with the same proton number but different number of neutrons.

3 0
2 years ago
HELP!!!
ruslelena [56]
A positively charged ion is attracted to a negatively charged ion. ... represents the simplest ratio of the ions involved in the ionic compound. Oxyanion. is a polyatomic ion composed of an element and one or more oxygen atoms.
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