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ICE Princess25 [194]
3 years ago
13

A student is investigating acceleration using balls with

Chemistry
1 answer:
netineya [11]3 years ago
3 0

Answer:

15

Explanation:

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The burning of 1.0 g of coal produces 8.4 kcal. How many kilojoules are produced?
Andre45 [30]
The conversations need to solve this problem:

1 cal = 4.184 joules
1 Kcal= 1000 calories
1 kj= 1000 joules

or a more direct approach---->> 1 Kcal = 4.184 Kjoules

8.4 kcal (1000 calories/ 1 Kcal) x (4.184 joules/ 1 cal) x (1 Kj/ 1000 joules)= 35.1 Kj

or 8.4 kcal (4.184 Kj/ 1 kcal)= 35.1 Kj (same answer)
7 0
3 years ago
Two descriptions for a sub-atomic particle are listed below:
Dmitrij [34]
Can not be D or B and A is not enough so C is right.
4 0
3 years ago
Read 2 more answers
Al (NO3)3 + H2S –»<br><br>please help me​
Stella [2.4K]

Answer:

this reaction is a double displacement reaction in which, Aluminium nitrate reacts with hydrogen sulphide to form nitric acid and Aluminium sulphide.

here is the balanced chemical equation for the above reaction :

2 Al (NO3)3 + 3 H2S -> 6 HNO3 + Al2S3

4 0
4 years ago
what quantities will you need to measure to determine the specific heat of one of these liquids? (pivot)​
olganol [36]

Answer:

Specific heat capacity is measured by determining how much heat energy is needed to raise one gram of a substance one degree Celsius. The specific heat capacity of water is 4.2 joules per gram per degree Celsius or 1 calorie per gram per degree Celsius

Explanation:

5 0
3 years ago
Question 2 (0 points)
bazaltina [42]

Answer:

The probability  of spinning red with the spinner or rolling an odd number with the  die is \dfrac{1}{8}

Explanation:

Given that,

Total color in spinner = 4

Let the area of four parts is equal in the spinner.

We need to calculate the probability of spinning red

Using formula of probability

P(A) = \dfrac{Number\ of\ red\ color\ outcome}{Total\ number\ of\ colors\ in\ the\ spinner}

Put the value into the formula

P(A)=\dfrac{1}{4}

We need to calculate the probability of odd number of the die

Using formula of probability

P(B) = \dfrac{Number\ of\ odd\ digits\ outcome}{Total\ number\ of\ digits\ in\ the\ die}

Put the value into the formula

P(B)=\dfrac{3}{6}

P(B)=\dfrac{1}{2}

We need to calculate the probability  of spinning red with the spinner or rolling an odd number with the  die

Using formula of probability of two events which is independent

P(A\ and\ B)=P(A)\times P(B)

Put the value into the formula

P(A\ and\ B)=\dfrac{1}{4}\times\dfrac{1}{2}

P(A\ and\ B)=\dfrac{1}{8}

Hence, The probability  of spinning red with the spinner or rolling an odd number with the  die is \dfrac{1}{8}

5 0
3 years ago
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